trunk/sljit/sljitNativeARM_v5.c

/*
 *    Stack-less Just-In-Time compiler
 *
 *    Copyright 2009-2012 Zoltan Herczeg (hzmester@freemail.hu). All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification, are
 * permitted provided that the following conditions are met:
 *
 *   1. Redistributions of source code must retain the above copyright notice, this list of
 *      conditions and the following disclaimer.
 *
 *   2. Redistributions in binary form must reproduce the above copyright notice, this list
 *      of conditions and the following disclaimer in the documentation and/or other materials
 *      provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) AND CONTRIBUTORS ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
 * SHALL THE COPYRIGHT HOLDER(S) OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

SLJIT_API_FUNC_ATTRIBUTE SLJIT_CONST char* sljit_get_platform_name(void)
{
#if (defined SLJIT_CONFIG_ARM_V7 && SLJIT_CONFIG_ARM_V7)
        return "ARMv7" SLJIT_CPUINFO;
#elif (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
        return "ARMv5" SLJIT_CPUINFO;
#else
#error "Internal error: Unknown ARM architecture"
#endif
}

/* Last register + 1. */
#define TMP_REG1        (SLJIT_NO_REGISTERS + 1)
#define TMP_REG2        (SLJIT_NO_REGISTERS + 2)
#define TMP_REG3        (SLJIT_NO_REGISTERS + 3)
#define TMP_PC          (SLJIT_NO_REGISTERS + 4)

#define TMP_FREG1       (0)
#define TMP_FREG2       (SLJIT_FLOAT_REG6 + 1)

/* In ARM instruction words.
   Cache lines are usually 32 byte aligned. */
#define CONST_POOL_ALIGNMENT    8
#define CONST_POOL_EMPTY        0xffffffff

#define ALIGN_INSTRUCTION(ptr) \
        (sljit_uw*)(((sljit_uw)(ptr) + (CONST_POOL_ALIGNMENT * sizeof(sljit_uw)) - 1) & ~((CONST_POOL_ALIGNMENT * sizeof(sljit_uw)) - 1))
#define MAX_DIFFERENCE(max_diff) \
        (((max_diff) / (sljit_si)sizeof(sljit_uw)) - (CONST_POOL_ALIGNMENT - 1))

/* See sljit_emit_enter and sljit_emit_op0 if you want to change them. */
static SLJIT_CONST sljit_ub reg_map[SLJIT_NO_REGISTERS + 5] = {
        0, 0, 1, 2, 10, 11, 4, 5, 6, 7, 8, 13, 3, 12, 14, 15
};

#define RM(rm) (reg_map[rm])
#define RD(rd) (reg_map[rd] << 12)
#define RN(rn) (reg_map[rn] << 16)

/* --------------------------------------------------------------------- */
/*  Instrucion forms                                                     */
/* --------------------------------------------------------------------- */

/* The instruction includes the AL condition.
   INST_NAME - CONDITIONAL remove this flag. */
#define COND_MASK       0xf0000000
#define CONDITIONAL     0xe0000000
#define PUSH_POOL       0xff000000

/* DP - Data Processing instruction (use with EMIT_DATA_PROCESS_INS). */
#define ADC_DP          0x5
#define ADD_DP          0x4
#define AND_DP          0x0
#define B               0xea000000
#define BIC_DP          0xe
#define BL              0xeb000000
#define BLX             0xe12fff30
#define BX              0xe12fff10
#define CLZ             0xe16f0f10
#define CMP_DP          0xa
#define BKPT            0xe1200070
#define EOR_DP          0x1
#define MOV_DP          0xd
#define MUL             0xe0000090
#define MVN_DP          0xf
#define NOP             0xe1a00000
#define ORR_DP          0xc
#define PUSH            0xe92d0000
#define POP             0xe8bd0000
#define RSB_DP          0x3
#define RSC_DP          0x7
#define SBC_DP          0x6
#define SMULL           0xe0c00090
#define SUB_DP          0x2
#define UMULL           0xe0800090
#define VABS_F32        0xeeb00ac0
#define VADD_F32        0xee300a00
#define VCMP_F32        0xeeb40a40
#define VDIV_F32        0xee800a00
#define VMOV_F32        0xeeb00a40
#define VMRS            0xeef1fa10
#define VMUL_F32        0xee200a00
#define VNEG_F32        0xeeb10a40
#define VSTR_F32        0xed000a00
#define VSUB_F32        0xee300a40

#if (defined SLJIT_CONFIG_ARM_V7 && SLJIT_CONFIG_ARM_V7)
/* Arm v7 specific instructions. */
#define MOVW            0xe3000000
#define MOVT            0xe3400000
#define SXTB            0xe6af0070
#define SXTH            0xe6bf0070
#define UXTB            0xe6ef0070
#define UXTH            0xe6ff0070
#endif

#if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)

static sljit_si push_cpool(struct sljit_compiler *compiler)
{
        /* Pushing the constant pool into the instruction stream. */
        sljit_uw* inst;
        sljit_uw* cpool_ptr;
        sljit_uw* cpool_end;
        sljit_si i;

        /* The label could point the address after the constant pool. */
        if (compiler->last_label && compiler->last_label->size == compiler->size)
                compiler->last_label->size += compiler->cpool_fill + (CONST_POOL_ALIGNMENT - 1) + 1;

        SLJIT_ASSERT(compiler->cpool_fill > 0 && compiler->cpool_fill <= CPOOL_SIZE);
        inst = (sljit_uw*)ensure_buf(compiler, sizeof(sljit_uw));
        FAIL_IF(!inst);
        compiler->size++;
        *inst = 0xff000000 | compiler->cpool_fill;

        for (i = 0; i < CONST_POOL_ALIGNMENT - 1; i++) {
                inst = (sljit_uw*)ensure_buf(compiler, sizeof(sljit_uw));
                FAIL_IF(!inst);
                compiler->size++;
                *inst = 0;
        }

        cpool_ptr = compiler->cpool;
        cpool_end = cpool_ptr + compiler->cpool_fill;
        while (cpool_ptr < cpool_end) {
                inst = (sljit_uw*)ensure_buf(compiler, sizeof(sljit_uw));
                FAIL_IF(!inst);
                compiler->size++;
                *inst = *cpool_ptr++;
        }
        compiler->cpool_diff = CONST_POOL_EMPTY;
        compiler->cpool_fill = 0;
        return SLJIT_SUCCESS;
}

static sljit_si push_inst(struct sljit_compiler *compiler, sljit_uw inst)
{
        sljit_uw* ptr;

        if (SLJIT_UNLIKELY(compiler->cpool_diff != CONST_POOL_EMPTY && compiler->size - compiler->cpool_diff >= MAX_DIFFERENCE(4092)))
                FAIL_IF(push_cpool(compiler));

        ptr = (sljit_uw*)ensure_buf(compiler, sizeof(sljit_uw));
        FAIL_IF(!ptr);
        compiler->size++;
        *ptr = inst;
        return SLJIT_SUCCESS;
}

static sljit_si push_inst_with_literal(struct sljit_compiler *compiler, sljit_uw inst, sljit_uw literal)
{
        sljit_uw* ptr;
        sljit_uw cpool_index = CPOOL_SIZE;
        sljit_uw* cpool_ptr;
        sljit_uw* cpool_end;
        sljit_ub* cpool_unique_ptr;

        if (SLJIT_UNLIKELY(compiler->cpool_diff != CONST_POOL_EMPTY && compiler->size - compiler->cpool_diff >= MAX_DIFFERENCE(4092)))
                FAIL_IF(push_cpool(compiler));
        else if (compiler->cpool_fill > 0) {
                cpool_ptr = compiler->cpool;
                cpool_end = cpool_ptr + compiler->cpool_fill;
                cpool_unique_ptr = compiler->cpool_unique;
                do {
                        if ((*cpool_ptr == literal) && !(*cpool_unique_ptr)) {
                                cpool_index = cpool_ptr - compiler->cpool;
                                break;
                        }
                        cpool_ptr++;
                        cpool_unique_ptr++;
                } while (cpool_ptr < cpool_end);
        }

        if (cpool_index == CPOOL_SIZE) {
                /* Must allocate a new entry in the literal pool. */
                if (compiler->cpool_fill < CPOOL_SIZE) {
                        cpool_index = compiler->cpool_fill;
                        compiler->cpool_fill++;
                }
                else {
                        FAIL_IF(push_cpool(compiler));
                        cpool_index = 0;
                        compiler->cpool_fill = 1;
                }
        }

        SLJIT_ASSERT((inst & 0xfff) == 0);
        ptr = (sljit_uw*)ensure_buf(compiler, sizeof(sljit_uw));
        FAIL_IF(!ptr);
        compiler->size++;
        *ptr = inst | cpool_index;

        compiler->cpool[cpool_index] = literal;
        compiler->cpool_unique[cpool_index] = 0;
        if (compiler->cpool_diff == CONST_POOL_EMPTY)
                compiler->cpool_diff = compiler->size;
        return SLJIT_SUCCESS;
}

static sljit_si push_inst_with_unique_literal(struct sljit_compiler *compiler, sljit_uw inst, sljit_uw literal)
{
        sljit_uw* ptr;
        if (SLJIT_UNLIKELY((compiler->cpool_diff != CONST_POOL_EMPTY && compiler->size - compiler->cpool_diff >= MAX_DIFFERENCE(4092)) || compiler->cpool_fill >= CPOOL_SIZE))
                FAIL_IF(push_cpool(compiler));

        SLJIT_ASSERT(compiler->cpool_fill < CPOOL_SIZE && (inst & 0xfff) == 0);
        ptr = (sljit_uw*)ensure_buf(compiler, sizeof(sljit_uw));
        FAIL_IF(!ptr);
        compiler->size++;
        *ptr = inst | compiler->cpool_fill;

        compiler->cpool[compiler->cpool_fill] = literal;
        compiler->cpool_unique[compiler->cpool_fill] = 1;
        compiler->cpool_fill++;
        if (compiler->cpool_diff == CONST_POOL_EMPTY)
                compiler->cpool_diff = compiler->size;
        return SLJIT_SUCCESS;
}

static SLJIT_INLINE sljit_si prepare_blx(struct sljit_compiler *compiler)
{
        /* Place for at least two instruction (doesn't matter whether the first has a literal). */
        if (SLJIT_UNLIKELY(compiler->cpool_diff != CONST_POOL_EMPTY && compiler->size - compiler->cpool_diff >= MAX_DIFFERENCE(4088)))
                return push_cpool(compiler);
        return SLJIT_SUCCESS;
}

static SLJIT_INLINE sljit_si emit_blx(struct sljit_compiler *compiler)
{
        /* Must follow tightly the previous instruction (to be able to convert it to bl instruction). */
        SLJIT_ASSERT(compiler->cpool_diff == CONST_POOL_EMPTY || compiler->size - compiler->cpool_diff < MAX_DIFFERENCE(4092));
        return push_inst(compiler, BLX | RM(TMP_REG1));
}

static sljit_uw patch_pc_relative_loads(sljit_uw *last_pc_patch, sljit_uw *code_ptr, sljit_uw* const_pool, sljit_uw cpool_size)
{
        sljit_uw diff;
        sljit_uw ind;
        sljit_uw counter = 0;
        sljit_uw* clear_const_pool = const_pool;
        sljit_uw* clear_const_pool_end = const_pool + cpool_size;

        SLJIT_ASSERT(const_pool - code_ptr <= CONST_POOL_ALIGNMENT);
        /* Set unused flag for all literals in the constant pool.
           I.e.: unused literals can belong to branches, which can be encoded as B or BL.
           We can "compress" the constant pool by discarding these literals. */
        while (clear_const_pool < clear_const_pool_end)
                *clear_const_pool++ = (sljit_uw)(-1);

        while (last_pc_patch < code_ptr) {
                /* Data transfer instruction with Rn == r15. */
                if ((*last_pc_patch & 0x0c0f0000) == 0x040f0000) {
                        diff = const_pool - last_pc_patch;
                        ind = (*last_pc_patch) & 0xfff;

                        /* Must be a load instruction with immediate offset. */
                        SLJIT_ASSERT(ind < cpool_size && !(*last_pc_patch & (1 << 25)) && (*last_pc_patch & (1 << 20)));
                        if ((sljit_si)const_pool[ind] < 0) {
                                const_pool[ind] = counter;
                                ind = counter;
                                counter++;
                        }
                        else
                                ind = const_pool[ind];

                        SLJIT_ASSERT(diff >= 1);
                        if (diff >= 2 || ind > 0) {
                                diff = (diff + ind - 2) << 2;
                                SLJIT_ASSERT(diff <= 0xfff);
                                *last_pc_patch = (*last_pc_patch & ~0xfff) | diff;
                        }
                        else
                                *last_pc_patch = (*last_pc_patch & ~(0xfff | (1 << 23))) | 0x004;
                }
                last_pc_patch++;
        }
        return counter;
}

/* In some rare ocasions we may need future patches. The probability is close to 0 in practice. */
struct future_patch {
        struct future_patch* next;
        sljit_si index;
        sljit_si value;
};

static SLJIT_INLINE sljit_si resolve_const_pool_index(struct future_patch **first_patch, sljit_uw cpool_current_index, sljit_uw *cpool_start_address, sljit_uw *buf_ptr)
{
        sljit_si value;
        struct future_patch *curr_patch, *prev_patch;

        /* Using the values generated by patch_pc_relative_loads. */
        if (!*first_patch)
                value = (sljit_si)cpool_start_address[cpool_current_index];
        else {
                curr_patch = *first_patch;
                prev_patch = 0;
                while (1) {
                        if (!curr_patch) {
                                value = (sljit_si)cpool_start_address[cpool_current_index];
                                break;
                        }
                        if ((sljit_uw)curr_patch->index == cpool_current_index) {
                                value = curr_patch->value;
                                if (prev_patch)
                                        prev_patch->next = curr_patch->next;
                                else
                                        *first_patch = curr_patch->next;
                                SLJIT_FREE(curr_patch);
                                break;
                        }
                        prev_patch = curr_patch;
                        curr_patch = curr_patch->next;
                }
        }

        if (value >= 0) {
                if ((sljit_uw)value > cpool_current_index) {
                        curr_patch = (struct future_patch*)SLJIT_MALLOC(sizeof(struct future_patch));
                        if (!curr_patch) {
                                while (*first_patch) {
                                        curr_patch = *first_patch;
                                        *first_patch = (*first_patch)->next;
                                        SLJIT_FREE(curr_patch);
                                }
                                return SLJIT_ERR_ALLOC_FAILED;
                        }
                        curr_patch->next = *first_patch;
                        curr_patch->index = value;
                        curr_patch->value = cpool_start_address[value];
                        *first_patch = curr_patch;
                }
                cpool_start_address[value] = *buf_ptr;
        }
        return SLJIT_SUCCESS;
}

#else

static sljit_si push_inst(struct sljit_compiler *compiler, sljit_uw inst)
{
        sljit_uw* ptr;

        ptr = (sljit_uw*)ensure_buf(compiler, sizeof(sljit_uw));
        FAIL_IF(!ptr);
        compiler->size++;
        *ptr = inst;
        return SLJIT_SUCCESS;
}

static SLJIT_INLINE sljit_si emit_imm(struct sljit_compiler *compiler, sljit_si reg, sljit_sw imm)
{
        FAIL_IF(push_inst(compiler, MOVW | RD(reg) | ((imm << 4) & 0xf0000) | (imm & 0xfff)));
        return push_inst(compiler, MOVT | RD(reg) | ((imm >> 12) & 0xf0000) | ((imm >> 16) & 0xfff));
}

#endif

static SLJIT_INLINE sljit_si detect_jump_type(struct sljit_jump *jump, sljit_uw *code_ptr, sljit_uw *code)
{
        sljit_sw diff;

        if (jump->flags & SLJIT_REWRITABLE_JUMP)
                return 0;

#if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
        if (jump->flags & IS_BL)
                code_ptr--;

        if (jump->flags & JUMP_ADDR)
                diff = ((sljit_sw)jump->u.target - (sljit_sw)(code_ptr + 2));
        else {
                SLJIT_ASSERT(jump->flags & JUMP_LABEL);
                diff = ((sljit_sw)(code + jump->u.label->size) - (sljit_sw)(code_ptr + 2));
        }

        /* Branch to Thumb code has not been optimized yet. */
        if (diff & 0x3)
                return 0;

        if (jump->flags & IS_BL) {
                if (diff <= 0x01ffffff && diff >= -0x02000000) {
                        *code_ptr = (BL - CONDITIONAL) | (*(code_ptr + 1) & COND_MASK);
                        jump->flags |= PATCH_B;
                        return 1;
                }
        }
        else {
                if (diff <= 0x01ffffff && diff >= -0x02000000) {
                        *code_ptr = (B - CONDITIONAL) | (*code_ptr & COND_MASK);
                        jump->flags |= PATCH_B;
                }
        }
#else
        if (jump->flags & JUMP_ADDR)
                diff = ((sljit_sw)jump->u.target - (sljit_sw)code_ptr);
        else {
                SLJIT_ASSERT(jump->flags & JUMP_LABEL);
                diff = ((sljit_sw)(code + jump->u.label->size) - (sljit_sw)code_ptr);
        }

        /* Branch to Thumb code has not been optimized yet. */
        if (diff & 0x3)
                return 0;

        if (diff <= 0x01ffffff && diff >= -0x02000000) {
                code_ptr -= 2;
                *code_ptr = ((jump->flags & IS_BL) ? (BL - CONDITIONAL) : (B - CONDITIONAL)) | (code_ptr[2] & COND_MASK);
                jump->flags |= PATCH_B;
                return 1;
        }
#endif
        return 0;
}

static SLJIT_INLINE void inline_set_jump_addr(sljit_uw addr, sljit_uw new_addr, sljit_si flush)
{
#if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
        sljit_uw *ptr = (sljit_uw*)addr;
        sljit_uw *inst = (sljit_uw*)ptr[0];
        sljit_uw mov_pc = ptr[1];
        sljit_si bl = (mov_pc & 0x0000f000) != RD(TMP_PC);
        sljit_sw diff = (sljit_sw)(((sljit_sw)new_addr - (sljit_sw)(inst + 2)) >> 2);

        if (diff <= 0x7fffff && diff >= -0x800000) {
                /* Turn to branch. */
                if (!bl) {
                        inst[0] = (mov_pc & COND_MASK) | (B - CONDITIONAL) | (diff & 0xffffff);
                        if (flush) {
                                SLJIT_CACHE_FLUSH(inst, inst + 1);
                        }
                } else {
                        inst[0] = (mov_pc & COND_MASK) | (BL - CONDITIONAL) | (diff & 0xffffff);
                        inst[1] = NOP;
                        if (flush) {
                                SLJIT_CACHE_FLUSH(inst, inst + 2);
                        }
                }
        } else {
                /* Get the position of the constant. */
                if (mov_pc & (1 << 23))
                        ptr = inst + ((mov_pc & 0xfff) >> 2) + 2;
                else
                        ptr = inst + 1;

                if (*inst != mov_pc) {
                        inst[0] = mov_pc;
                        if (!bl) {
                                if (flush) {
                                        SLJIT_CACHE_FLUSH(inst, inst + 1);
                                }
                        } else {
                                inst[1] = BLX | RM(TMP_REG1);
                                if (flush) {
                                        SLJIT_CACHE_FLUSH(inst, inst + 2);
                                }
                        }
                }
                *ptr = new_addr;
        }
#else
        sljit_uw *inst = (sljit_uw*)addr;
        SLJIT_ASSERT((inst[0] & 0xfff00000) == MOVW && (inst[1] & 0xfff00000) == MOVT);
        inst[0] = MOVW | (inst[0] & 0xf000) | ((new_addr << 4) & 0xf0000) | (new_addr & 0xfff);
        inst[1] = MOVT | (inst[1] & 0xf000) | ((new_addr >> 12) & 0xf0000) | ((new_addr >> 16) & 0xfff);
        if (flush) {
                SLJIT_CACHE_FLUSH(inst, inst + 2);
        }
#endif
}

static sljit_uw get_imm(sljit_uw imm);

static SLJIT_INLINE void inline_set_const(sljit_uw addr, sljit_sw new_constant, sljit_si flush)
{
#if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
        sljit_uw *ptr = (sljit_uw*)addr;
        sljit_uw *inst = (sljit_uw*)ptr[0];
        sljit_uw ldr_literal = ptr[1];
        sljit_uw src2;

        src2 = get_imm(new_constant);
        if (src2) {
                *inst = 0xe3a00000 | (ldr_literal & 0xf000) | src2;
                if (flush) {
                        SLJIT_CACHE_FLUSH(inst, inst + 1);
                }
                return;
        }

        src2 = get_imm(~new_constant);
        if (src2) {
                *inst = 0xe3e00000 | (ldr_literal & 0xf000) | src2;
                if (flush) {
                        SLJIT_CACHE_FLUSH(inst, inst + 1);
                }
                return;
        }

        if (ldr_literal & (1 << 23))
                ptr = inst + ((ldr_literal & 0xfff) >> 2) + 2;
        else
                ptr = inst + 1;

        if (*inst != ldr_literal) {
                *inst = ldr_literal;
                if (flush) {
                        SLJIT_CACHE_FLUSH(inst, inst + 1);
                }
        }
        *ptr = new_constant;
#else
        sljit_uw *inst = (sljit_uw*)addr;
        SLJIT_ASSERT((inst[0] & 0xfff00000) == MOVW && (inst[1] & 0xfff00000) == MOVT);
        inst[0] = MOVW | (inst[0] & 0xf000) | ((new_constant << 4) & 0xf0000) | (new_constant & 0xfff);
        inst[1] = MOVT | (inst[1] & 0xf000) | ((new_constant >> 12) & 0xf0000) | ((new_constant >> 16) & 0xfff);
        if (flush) {
                SLJIT_CACHE_FLUSH(inst, inst + 2);
        }
#endif
}

SLJIT_API_FUNC_ATTRIBUTE void* sljit_generate_code(struct sljit_compiler *compiler)
{
        struct sljit_memory_fragment *buf;
        sljit_uw *code;
        sljit_uw *code_ptr;
        sljit_uw *buf_ptr;
        sljit_uw *buf_end;
        sljit_uw size;
        sljit_uw word_count;
#if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
        sljit_uw cpool_size;
        sljit_uw cpool_skip_alignment;
        sljit_uw cpool_current_index;
        sljit_uw *cpool_start_address;
        sljit_uw *last_pc_patch;
        struct future_patch *first_patch;
#endif

        struct sljit_label *label;
        struct sljit_jump *jump;
        struct sljit_const *const_;

        CHECK_ERROR_PTR();
        check_sljit_generate_code(compiler);
        reverse_buf(compiler);

        /* Second code generation pass. */
#if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
        size = compiler->size + (compiler->patches << 1);
        if (compiler->cpool_fill > 0)
                size += compiler->cpool_fill + CONST_POOL_ALIGNMENT - 1;
#else
        size = compiler->size;
#endif
        code = (sljit_uw*)SLJIT_MALLOC_EXEC(size * sizeof(sljit_uw));
        PTR_FAIL_WITH_EXEC_IF(code);
        buf = compiler->buf;

#if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
        cpool_size = 0;
        cpool_skip_alignment = 0;
        cpool_current_index = 0;
        cpool_start_address = NULL;
        first_patch = NULL;
        last_pc_patch = code;
#endif

        code_ptr = code;
        word_count = 0;

        label = compiler->labels;
        jump = compiler->jumps;
        const_ = compiler->consts;

        if (label && label->size == 0) {
                label->addr = (sljit_uw)code;
                label->size = 0;
                label = label->next;
        }

        do {
                buf_ptr = (sljit_uw*)buf->memory;
                buf_end = buf_ptr + (buf->used_size >> 2);
                do {
                        word_count++;
#if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
                        if (cpool_size > 0) {
                                if (cpool_skip_alignment > 0) {
                                        buf_ptr++;
                                        cpool_skip_alignment--;
                                }
                                else {
                                        if (SLJIT_UNLIKELY(resolve_const_pool_index(&first_patch, cpool_current_index, cpool_start_address, buf_ptr))) {
                                                SLJIT_FREE_EXEC(code);
                                                compiler->error = SLJIT_ERR_ALLOC_FAILED;
                                                return NULL;
                                        }
                                        buf_ptr++;
                                        if (++cpool_current_index >= cpool_size) {
                                                SLJIT_ASSERT(!first_patch);
                                                cpool_size = 0;
                                                if (label && label->size == word_count) {
                                                        /* Points after the current instruction. */
                                                        label->addr = (sljit_uw)code_ptr;
                                                        label->size = code_ptr - code;
                                                        label = label->next;
                                                }
                                        }
                                }
                        }
                        else if ((*buf_ptr & 0xff000000) != PUSH_POOL) {
#endif
                                *code_ptr = *buf_ptr++;
                                /* These structures are ordered by their address. */
                                SLJIT_ASSERT(!label || label->size >= word_count);
                                SLJIT_ASSERT(!jump || jump->addr >= word_count);
                                SLJIT_ASSERT(!const_ || const_->addr >= word_count);
                                if (jump && jump->addr == word_count) {
#if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
                                        if (detect_jump_type(jump, code_ptr, code))
                                                code_ptr--;
                                        jump->addr = (sljit_uw)code_ptr;
#else
                                        jump->addr = (sljit_uw)(code_ptr - 2);
                                        if (detect_jump_type(jump, code_ptr, code))
                                                code_ptr -= 2;
#endif
                                        jump = jump->next;
                                }
                                if (label && label->size == word_count) {
                                        /* code_ptr can be affected above. */
                                        label->addr = (sljit_uw)(code_ptr + 1);
                                        label->size = (code_ptr + 1) - code;
                                        label = label->next;
                                }
                                if (const_ && const_->addr == word_count) {
#if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
                                        const_->addr = (sljit_uw)code_ptr;
#else
                                        const_->addr = (sljit_uw)(code_ptr - 1);
#endif
                                        const_ = const_->next;
                                }
                                code_ptr++;
#if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
                        }
                        else {
                                /* Fortunately, no need to shift. */
                                cpool_size = *buf_ptr++ & ~PUSH_POOL;
                                SLJIT_ASSERT(cpool_size > 0);
                                cpool_start_address = ALIGN_INSTRUCTION(code_ptr + 1);
                                cpool_current_index = patch_pc_relative_loads(last_pc_patch, code_ptr, cpool_start_address, cpool_size);
                                if (cpool_current_index > 0) {
                                        /* Unconditional branch. */
                                        *code_ptr = B | (((cpool_start_address - code_ptr) + cpool_current_index - 2) & ~PUSH_POOL);
                                        code_ptr = cpool_start_address + cpool_current_index;
                                }
                                cpool_skip_alignment = CONST_POOL_ALIGNMENT - 1;
                                cpool_current_index = 0;
                                last_pc_patch = code_ptr;
                        }
#endif
                } while (buf_ptr < buf_end);
                buf = buf->next;
        } while (buf);

        SLJIT_ASSERT(!label);
        SLJIT_ASSERT(!jump);
        SLJIT_ASSERT(!const_);

#if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
        SLJIT_ASSERT(cpool_size == 0);
        if (compiler->cpool_fill > 0) {
                cpool_start_address = ALIGN_INSTRUCTION(code_ptr);
                cpool_current_index = patch_pc_relative_loads(last_pc_patch, code_ptr, cpool_start_address, compiler->cpool_fill);
                if (cpool_current_index > 0)
                        code_ptr = cpool_start_address + cpool_current_index;

                buf_ptr = compiler->cpool;
                buf_end = buf_ptr + compiler->cpool_fill;
                cpool_current_index = 0;
                while (buf_ptr < buf_end) {
                        if (SLJIT_UNLIKELY(resolve_const_pool_index(&first_patch, cpool_current_index, cpool_start_address, buf_ptr))) {
                                SLJIT_FREE_EXEC(code);
                                compiler->error = SLJIT_ERR_ALLOC_FAILED;
                                return NULL;
                        }
                        buf_ptr++;
                        cpool_current_index++;
                }
                SLJIT_ASSERT(!first_patch);
        }
#endif

        jump = compiler->jumps;
        while (jump) {
                buf_ptr = (sljit_uw*)jump->addr;

                if (jump->flags & PATCH_B) {
                        if (!(jump->flags & JUMP_ADDR)) {
                                SLJIT_ASSERT(jump->flags & JUMP_LABEL);
                                SLJIT_ASSERT(((sljit_sw)jump->u.label->addr - (sljit_sw)(buf_ptr + 2)) <= 0x01ffffff && ((sljit_sw)jump->u.label->addr - (sljit_sw)(buf_ptr + 2)) >= -0x02000000);
                                *buf_ptr |= (((sljit_sw)jump->u.label->addr - (sljit_sw)(buf_ptr + 2)) >> 2) & 0x00ffffff;
                        }
                        else {
                                SLJIT_ASSERT(((sljit_sw)jump->u.target - (sljit_sw)(buf_ptr + 2)) <= 0x01ffffff && ((sljit_sw)jump->u.target - (sljit_sw)(buf_ptr + 2)) >= -0x02000000);
                                *buf_ptr |= (((sljit_sw)jump->u.target - (sljit_sw)(buf_ptr + 2)) >> 2) & 0x00ffffff;
                        }
                }
                else if (jump->flags & SLJIT_REWRITABLE_JUMP) {
#if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
                        jump->addr = (sljit_uw)code_ptr;
                        code_ptr[0] = (sljit_uw)buf_ptr;
                        code_ptr[1] = *buf_ptr;
                        inline_set_jump_addr((sljit_uw)code_ptr, (jump->flags & JUMP_LABEL) ? jump->u.label->addr : jump->u.target, 0);
                        code_ptr += 2;
#else
                        inline_set_jump_addr((sljit_uw)buf_ptr, (jump->flags & JUMP_LABEL) ? jump->u.label->addr : jump->u.target, 0);
#endif
                }
                else {
#if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
                        if (jump->flags & IS_BL)
                                buf_ptr--;
                        if (*buf_ptr & (1 << 23))
                                buf_ptr += ((*buf_ptr & 0xfff) >> 2) + 2;
                        else
                                buf_ptr += 1;
                        *buf_ptr = (jump->flags & JUMP_LABEL) ? jump->u.label->addr : jump->u.target;
#else
                        inline_set_jump_addr((sljit_uw)buf_ptr, (jump->flags & JUMP_LABEL) ? jump->u.label->addr : jump->u.target, 0);
#endif
                }
                jump = jump->next;
        }

#if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
        const_ = compiler->consts;
        while (const_) {
                buf_ptr = (sljit_uw*)const_->addr;
                const_->addr = (sljit_uw)code_ptr;

                code_ptr[0] = (sljit_uw)buf_ptr;
                code_ptr[1] = *buf_ptr;
                if (*buf_ptr & (1 << 23))
                        buf_ptr += ((*buf_ptr & 0xfff) >> 2) + 2;
                else
                        buf_ptr += 1;
                /* Set the value again (can be a simple constant). */
                inline_set_const((sljit_uw)code_ptr, *buf_ptr, 0);
                code_ptr += 2;

                const_ = const_->next;
        }
#endif

        SLJIT_ASSERT(code_ptr - code <= (sljit_si)size);

        compiler->error = SLJIT_ERR_COMPILED;
        compiler->executable_size = (code_ptr - code) * sizeof(sljit_uw);
        SLJIT_CACHE_FLUSH(code, code_ptr);
        return code;
}

/* --------------------------------------------------------------------- */
/*  Entry, exit                                                          */
/* --------------------------------------------------------------------- */

/* emit_op inp_flags.
   WRITE_BACK must be the first, since it is a flag. */
#define WRITE_BACK      0x01
#define ALLOW_IMM       0x02
#define ALLOW_INV_IMM   0x04
#define ALLOW_ANY_IMM   (ALLOW_IMM | ALLOW_INV_IMM)
#define ARG_TEST        0x08

/* Creates an index in data_transfer_insts array. */
#define WORD_DATA       0x00
#define BYTE_DATA       0x10
#define HALF_DATA       0x20
#define SIGNED_DATA     0x40
#define LOAD_DATA       0x80

#define EMIT_INSTRUCTION(inst) \
        FAIL_IF(push_inst(compiler, (inst)))

/* Condition: AL. */
#define EMIT_DATA_PROCESS_INS(opcode, set_flags, dst, src1, src2) \
        (0xe0000000 | ((opcode) << 21) | (set_flags) | RD(dst) | RN(src1) | (src2))

static sljit_si emit_op(struct sljit_compiler *compiler, sljit_si op, sljit_si inp_flags,
        sljit_si dst, sljit_sw dstw,
        sljit_si src1, sljit_sw src1w,
        sljit_si src2, sljit_sw src2w);

SLJIT_API_FUNC_ATTRIBUTE sljit_si sljit_emit_enter(struct sljit_compiler *compiler, sljit_si args, sljit_si scratches, sljit_si saveds, sljit_si local_size)
{
        sljit_si size;
        sljit_uw push;

        CHECK_ERROR();
        check_sljit_emit_enter(compiler, args, scratches, saveds, local_size);

        compiler->scratches = scratches;
        compiler->saveds = saveds;
#if (defined SLJIT_DEBUG && SLJIT_DEBUG)
        compiler->logical_local_size = local_size;
#endif

        /* Push saved registers, temporary registers
           stmdb sp!, {..., lr} */
        push = PUSH | (1 << 14);
        if (scratches >= 5)
                push |= 1 << 11;
        if (scratches >= 4)
                push |= 1 << 10;
        if (saveds >= 5)
                push |= 1 << 8;
        if (saveds >= 4)
                push |= 1 << 7;
        if (saveds >= 3)
                push |= 1 << 6;
        if (saveds >= 2)
                push |= 1 << 5;
        if (saveds >= 1)
                push |= 1 << 4;
        EMIT_INSTRUCTION(push);

        /* Stack must be aligned to 8 bytes: */
        size = (1 + saveds) * sizeof(sljit_uw);
        if (scratches >= 4)
                size += (scratches - 3) * sizeof(sljit_uw);
        local_size += size;
        local_size = (local_size + 7) & ~7;
        local_size -= size;
        compiler->local_size = local_size;
        if (local_size > 0)
                FAIL_IF(emit_op(compiler, SLJIT_SUB, ALLOW_IMM, SLJIT_LOCALS_REG, 0, SLJIT_LOCALS_REG, 0, SLJIT_IMM, local_size));

        if (args >= 1)
                EMIT_INSTRUCTION(EMIT_DATA_PROCESS_INS(MOV_DP, 0, SLJIT_SAVED_REG1, SLJIT_UNUSED, RM(SLJIT_SCRATCH_REG1)));
        if (args >= 2)
                EMIT_INSTRUCTION(EMIT_DATA_PROCESS_INS(MOV_DP, 0, SLJIT_SAVED_REG2, SLJIT_UNUSED, RM(SLJIT_SCRATCH_REG2)));
        if (args >= 3)
                EMIT_INSTRUCTION(EMIT_DATA_PROCESS_INS(MOV_DP, 0, SLJIT_SAVED_REG3, SLJIT_UNUSED, RM(SLJIT_SCRATCH_REG3)));

        return SLJIT_SUCCESS;
}

SLJIT_API_FUNC_ATTRIBUTE void sljit_set_context(struct sljit_compiler *compiler, sljit_si args, sljit_si scratches, sljit_si saveds, sljit_si local_size)
{
        sljit_si size;

        CHECK_ERROR_VOID();
        check_sljit_set_context(compiler, args, scratches, saveds, local_size);

        compiler->scratches = scratches;
        compiler->saveds = saveds;
#if (defined SLJIT_DEBUG && SLJIT_DEBUG)
        compiler->logical_local_size = local_size;
#endif

        size = (1 + saveds) * sizeof(sljit_uw);
        if (scratches >= 4)
                size += (scratches - 3) * sizeof(sljit_uw);
        local_size += size;
        local_size = (local_size + 7) & ~7;
        local_size -= size;
        compiler->local_size = local_size;
}

SLJIT_API_FUNC_ATTRIBUTE sljit_si sljit_emit_return(struct sljit_compiler *compiler, sljit_si op, sljit_si src, sljit_sw srcw)
{
        sljit_uw pop;

        CHECK_ERROR();
        check_sljit_emit_return(compiler, op, src, srcw);

        FAIL_IF(emit_mov_before_return(compiler, op, src, srcw));

        if (compiler->local_size > 0)
                FAIL_IF(emit_op(compiler, SLJIT_ADD, ALLOW_IMM, SLJIT_LOCALS_REG, 0, SLJIT_LOCALS_REG, 0, SLJIT_IMM, compiler->local_size));

        pop = POP | (1 << 15);
        /* Push saved registers, temporary registers
           ldmia sp!, {..., pc} */
        if (compiler->scratches >= 5)
                pop |= 1 << 11;
        if (compiler->scratches >= 4)
                pop |= 1 << 10;
        if (compiler->saveds >= 5)
                pop |= 1 << 8;
        if (compiler->saveds >= 4)
                pop |= 1 << 7;
        if (compiler->saveds >= 3)
                pop |= 1 << 6;
        if (compiler->saveds >= 2)
                pop |= 1 << 5;
        if (compiler->saveds >= 1)
                pop |= 1 << 4;

        return push_inst(compiler, pop);
}

/* --------------------------------------------------------------------- */
/*  Operators                                                            */
/* --------------------------------------------------------------------- */

/* s/l - store/load (1 bit)
   u/s - signed/unsigned (1 bit)
   w/b/h/N - word/byte/half/NOT allowed (2 bit)
   It contans 16 items, but not all are different. */

static sljit_sw data_transfer_insts[16] = {
/* s u w */ 0xe5000000 /* str */,
/* s u b */ 0xe5400000 /* strb */,
/* s u h */ 0xe10000b0 /* strh */,
/* s u N */ 0x00000000 /* not allowed */,
/* s s w */ 0xe5000000 /* str */,
/* s s b */ 0xe5400000 /* strb */,
/* s s h */ 0xe10000b0 /* strh */,
/* s s N */ 0x00000000 /* not allowed */,

/* l u w */ 0xe5100000 /* ldr */,
/* l u b */ 0xe5500000 /* ldrb */,
/* l u h */ 0xe11000b0 /* ldrh */,
/* l u N */ 0x00000000 /* not allowed */,
/* l s w */ 0xe5100000 /* ldr */,
/* l s b */ 0xe11000d0 /* ldrsb */,
/* l s h */ 0xe11000f0 /* ldrsh */,
/* l s N */ 0x00000000 /* not allowed */,
};

#define EMIT_DATA_TRANSFER(type, add, wb, target, base1, base2) \
        (data_transfer_insts[(type) >> 4] | ((add) << 23) | ((wb) << 21) | (reg_map[target] << 12) | (reg_map[base1] << 16) | (base2))
/* Normal ldr/str instruction.
   Type2: ldrsb, ldrh, ldrsh */
#define IS_TYPE1_TRANSFER(type) \
        (data_transfer_insts[(type) >> 4] & 0x04000000)
#define TYPE2_TRANSFER_IMM(imm) \
        (((imm) & 0xf) | (((imm) & 0xf0) << 4) | (1 << 22))

/* flags: */
  /* Arguments are swapped. */
#define ARGS_SWAPPED    0x01
  /* Inverted immediate. */
#define INV_IMM         0x02
  /* Source and destination is register. */
#define REG_DEST        0x04
#define REG_SOURCE      0x08
  /* One instruction is enough. */
#define FAST_DEST       0x10
  /* Multiple instructions are required. */
#define SLOW_DEST       0x20
/* SET_FLAGS must be (1 << 20) as it is also the value of S bit (can be used for optimization). */
#define SET_FLAGS       (1 << 20)
/* dst: reg
   src1: reg
   src2: reg or imm (if allowed)
   SRC2_IMM must be (1 << 25) as it is also the value of I bit (can be used for optimization). */
#define SRC2_IMM        (1 << 25)

#define EMIT_DATA_PROCESS_INS_AND_RETURN(opcode) \
        return push_inst(compiler, EMIT_DATA_PROCESS_INS(opcode, flags & SET_FLAGS, dst, src1, (src2 & SRC2_IMM) ? src2 : RM(src2)))

#define EMIT_FULL_DATA_PROCESS_INS_AND_RETURN(opcode, dst, src1, src2) \
        return push_inst(compiler, EMIT_DATA_PROCESS_INS(opcode, flags & SET_FLAGS, dst, src1, src2))

#define EMIT_SHIFT_INS_AND_RETURN(opcode) \
        SLJIT_ASSERT(!(flags & INV_IMM) && !(src2 & SRC2_IMM)); \
        if (compiler->shift_imm != 0x20) { \
                SLJIT_ASSERT(src1 == TMP_REG1); \
                SLJIT_ASSERT(!(flags & ARGS_SWAPPED)); \
                if (compiler->shift_imm != 0) \
                        return push_inst(compiler, EMIT_DATA_PROCESS_INS(MOV_DP, flags & SET_FLAGS, dst, SLJIT_UNUSED, (compiler->shift_imm << 7) | (opcode << 5) | reg_map[src2])); \
                return push_inst(compiler, EMIT_DATA_PROCESS_INS(MOV_DP, flags & SET_FLAGS, dst, SLJIT_UNUSED, reg_map[src2])); \
        } \
        return push_inst(compiler, EMIT_DATA_PROCESS_INS(MOV_DP, flags & SET_FLAGS, dst, SLJIT_UNUSED, (reg_map[(flags & ARGS_SWAPPED) ? src1 : src2] << 8) | (opcode << 5) | 0x10 | ((flags & ARGS_SWAPPED) ? reg_map[src2] : reg_map[src1])));

static SLJIT_INLINE sljit_si emit_single_op(struct sljit_compiler *compiler, sljit_si op, sljit_si flags,
        sljit_si dst, sljit_si src1, sljit_si src2)
{
        sljit_sw mul_inst;

        switch (GET_OPCODE(op)) {
        case SLJIT_MOV:
                SLJIT_ASSERT(src1 == TMP_REG1 && !(flags & ARGS_SWAPPED));
                if (dst != src2) {
                        if (src2 & SRC2_IMM) {
                                if (flags & INV_IMM)
                                        EMIT_FULL_DATA_PROCESS_INS_AND_RETURN(MVN_DP, dst, SLJIT_UNUSED, src2);
                                EMIT_FULL_DATA_PROCESS_INS_AND_RETURN(MOV_DP, dst, SLJIT_UNUSED, src2);
                        }
                        EMIT_FULL_DATA_PROCESS_INS_AND_RETURN(MOV_DP, dst, SLJIT_UNUSED, reg_map[src2]);
                }
                return SLJIT_SUCCESS;

        case SLJIT_MOV_UB:
        case SLJIT_MOV_SB:
                SLJIT_ASSERT(src1 == TMP_REG1 && !(flags & ARGS_SWAPPED));
                if ((flags & (REG_DEST | REG_SOURCE)) == (REG_DEST | REG_SOURCE)) {
#if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
                        if (op == SLJIT_MOV_UB)
                                return push_inst(compiler, EMIT_DATA_PROCESS_INS(AND_DP, 0, dst, src2, SRC2_IMM | 0xff));
                        EMIT_INSTRUCTION(EMIT_DATA_PROCESS_INS(MOV_DP, 0, dst, SLJIT_UNUSED, (24 << 7) | reg_map[src2]));
                        return push_inst(compiler, EMIT_DATA_PROCESS_INS(MOV_DP, 0, dst, SLJIT_UNUSED, (24 << 7) | (op == SLJIT_MOV_UB ? 0x20 : 0x40) | reg_map[dst]));
#else
                        return push_inst(compiler, (op == SLJIT_MOV_UB ? UXTB : SXTB) | RD(dst) | RM(src2));
#endif
                }
                else if (dst != src2) {
                        SLJIT_ASSERT(src2 & SRC2_IMM);
                        if (flags & INV_IMM)
                                EMIT_FULL_DATA_PROCESS_INS_AND_RETURN(MVN_DP, dst, SLJIT_UNUSED, src2);
                        EMIT_FULL_DATA_PROCESS_INS_AND_RETURN(MOV_DP, dst, SLJIT_UNUSED, src2);
                }
                return SLJIT_SUCCESS;

        case SLJIT_MOV_UH:
        case SLJIT_MOV_SH:
                SLJIT_ASSERT(src1 == TMP_REG1 && !(flags & ARGS_SWAPPED));
                if ((flags & (REG_DEST | REG_SOURCE)) == (REG_DEST | REG_SOURCE)) {
#if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
                        EMIT_INSTRUCTION(EMIT_DATA_PROCESS_INS(MOV_DP, 0, dst, SLJIT_UNUSED, (16 << 7) | reg_map[src2]));
                        return push_inst(compiler, EMIT_DATA_PROCESS_INS(MOV_DP, 0, dst, SLJIT_UNUSED, (16 << 7) | (op == SLJIT_MOV_UH ? 0x20 : 0x40) | reg_map[dst]));
#else
                        return push_inst(compiler, (op == SLJIT_MOV_UH ? UXTH : SXTH) | RD(dst) | RM(src2));
#endif
                }
                else if (dst != src2) {
                        SLJIT_ASSERT(src2 & SRC2_IMM);
                        if (flags & INV_IMM)
                                EMIT_FULL_DATA_PROCESS_INS_AND_RETURN(MVN_DP, dst, SLJIT_UNUSED, src2);
                        EMIT_FULL_DATA_PROCESS_INS_AND_RETURN(MOV_DP, dst, SLJIT_UNUSED, src2);
                }
                return SLJIT_SUCCESS;

        case SLJIT_NOT:
                if (src2 & SRC2_IMM) {
                        if (flags & INV_IMM)
                                EMIT_FULL_DATA_PROCESS_INS_AND_RETURN(MOV_DP, dst, SLJIT_UNUSED, src2);
                        EMIT_FULL_DATA_PROCESS_INS_AND_RETURN(MVN_DP, dst, SLJIT_UNUSED, src2);
                }
                EMIT_FULL_DATA_PROCESS_INS_AND_RETURN(MVN_DP, dst, SLJIT_UNUSED, RM(src2));

        case SLJIT_CLZ:
                SLJIT_ASSERT(!(flags & INV_IMM));
                SLJIT_ASSERT(!(src2 & SRC2_IMM));
                FAIL_IF(push_inst(compiler, CLZ | RD(dst) | RM(src2)));
                if (flags & SET_FLAGS)
                        EMIT_FULL_DATA_PROCESS_INS_AND_RETURN(CMP_DP, SLJIT_UNUSED, dst, SRC2_IMM);
                return SLJIT_SUCCESS;

        case SLJIT_ADD:
                SLJIT_ASSERT(!(flags & INV_IMM));
                EMIT_DATA_PROCESS_INS_AND_RETURN(ADD_DP);

        case SLJIT_ADDC:
                SLJIT_ASSERT(!(flags & INV_IMM));
                EMIT_DATA_PROCESS_INS_AND_RETURN(ADC_DP);

        case SLJIT_SUB:
                SLJIT_ASSERT(!(flags & INV_IMM));
                if (!(flags & ARGS_SWAPPED))
                        EMIT_DATA_PROCESS_INS_AND_RETURN(SUB_DP);
                EMIT_DATA_PROCESS_INS_AND_RETURN(RSB_DP);

        case SLJIT_SUBC:
                SLJIT_ASSERT(!(flags & INV_IMM));
                if (!(flags & ARGS_SWAPPED))
                        EMIT_DATA_PROCESS_INS_AND_RETURN(SBC_DP);
                EMIT_DATA_PROCESS_INS_AND_RETURN(RSC_DP);

        case SLJIT_MUL:
                SLJIT_ASSERT(!(flags & INV_IMM));
                SLJIT_ASSERT(!(src2 & SRC2_IMM));
                if (SLJIT_UNLIKELY(op & SLJIT_SET_O))
                        mul_inst = SMULL | (reg_map[TMP_REG3] << 16) | (reg_map[dst] << 12);
                else
                        mul_inst = MUL | (reg_map[dst] << 16);

                if (dst != src2)
                        FAIL_IF(push_inst(compiler, mul_inst | (reg_map[src1] << 8) | reg_map[src2]));
                else if (dst != src1)
                        FAIL_IF(push_inst(compiler, mul_inst | (reg_map[src2] << 8) | reg_map[src1]));
                else {
                        /* Rm and Rd must not be the same register. */
                        SLJIT_ASSERT(dst != TMP_REG1);
                        FAIL_IF(push_inst(compiler, EMIT_DATA_PROCESS_INS(MOV_DP, 0, TMP_REG1, SLJIT_UNUSED, reg_map[src2])));
                        FAIL_IF(push_inst(compiler, mul_inst | (reg_map[src2] << 8) | reg_map[TMP_REG1]));
                }

                if (!(op & SLJIT_SET_O))
                        return SLJIT_SUCCESS;

                /* We need to use TMP_REG3. */
                compiler->cache_arg = 0;
                compiler->cache_argw = 0;
                /* cmp TMP_REG2, dst asr #31. */
                return push_inst(compiler, EMIT_DATA_PROCESS_INS(CMP_DP, SET_FLAGS, SLJIT_UNUSED, TMP_REG3, RM(dst) | 0xfc0));

        case SLJIT_AND:
                if (!(flags & INV_IMM))
                        EMIT_DATA_PROCESS_INS_AND_RETURN(AND_DP);
                EMIT_DATA_PROCESS_INS_AND_RETURN(BIC_DP);

        case SLJIT_OR:
                SLJIT_ASSERT(!(flags & INV_IMM));
                EMIT_DATA_PROCESS_INS_AND_RETURN(ORR_DP);

        case SLJIT_XOR:
                SLJIT_ASSERT(!(flags & INV_IMM));
                EMIT_DATA_PROCESS_INS_AND_RETURN(EOR_DP);

        case SLJIT_SHL:
                EMIT_SHIFT_INS_AND_RETURN(0);

        case SLJIT_LSHR:
                EMIT_SHIFT_INS_AND_RETURN(1);

        case SLJIT_ASHR:
                EMIT_SHIFT_INS_AND_RETURN(2);
        }
        SLJIT_ASSERT_STOP();
        return SLJIT_SUCCESS;
}

#undef EMIT_DATA_PROCESS_INS_AND_RETURN
#undef EMIT_FULL_DATA_PROCESS_INS_AND_RETURN
#undef EMIT_SHIFT_INS_AND_RETURN

/* Tests whether the immediate can be stored in the 12 bit imm field.
   Returns with 0 if not possible. */
static sljit_uw get_imm(sljit_uw imm)
{
        sljit_si rol;

        if (imm <= 0xff)
                return SRC2_IMM | imm;

        if (!(imm & 0xff000000)) {
                imm <<= 8;
                rol = 8;
        }
        else {
                imm = (imm << 24) | (imm >> 8);
                rol = 0;
        }

        if (!(imm & 0xff000000)) {
                imm <<= 8;
                rol += 4;
        }

        if (!(imm & 0xf0000000)) {
                imm <<= 4;
                rol += 2;
        }

        if (!(imm & 0xc0000000)) {
                imm <<= 2;
                rol += 1;
        }

        if (!(imm & 0x00ffffff))
                return SRC2_IMM | (imm >> 24) | (rol << 8);
        else
                return 0;
}

#if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
static sljit_si generate_int(struct sljit_compiler *compiler, sljit_si reg, sljit_uw imm, sljit_si positive)
{
        sljit_uw mask;
        sljit_uw imm1;
        sljit_uw imm2;
        sljit_si rol;

        /* Step1: Search a zero byte (8 continous zero bit). */
        mask = 0xff000000;
        rol = 8;
        while(1) {
                if (!(imm & mask)) {
                        /* Rol imm by rol. */
                        imm = (imm << rol) | (imm >> (32 - rol));
                        /* Calculate arm rol. */
                        rol = 4 + (rol >> 1);
                        break;
                }
                rol += 2;
                mask >>= 2;
                if (mask & 0x3) {
                        /* rol by 8. */
                        imm = (imm << 8) | (imm >> 24);
                        mask = 0xff00;
                        rol = 24;
                        while (1) {
                                if (!(imm & mask)) {
                                        /* Rol imm by rol. */
                                        imm = (imm << rol) | (imm >> (32 - rol));
                                        /* Calculate arm rol. */
                                        rol = (rol >> 1) - 8;
                                        break;
                                }
                                rol += 2;
                                mask >>= 2;
                                if (mask & 0x3)
                                        return 0;
                        }
                        break;
                }
        }

        /* The low 8 bit must be zero. */
        SLJIT_ASSERT(!(imm & 0xff));

        if (!(imm & 0xff000000)) {
                imm1 = SRC2_IMM | ((imm >> 16) & 0xff) | (((rol + 4) & 0xf) << 8);
                imm2 = SRC2_IMM | ((imm >> 8) & 0xff) | (((rol + 8) & 0xf) << 8);
        }
        else if (imm & 0xc0000000) {
                imm1 = SRC2_IMM | ((imm >> 24) & 0xff) | ((rol & 0xf) << 8);
                imm <<= 8;
                rol += 4;

                if (!(imm & 0xff000000)) {
                        imm <<= 8;
                        rol += 4;
                }

                if (!(imm & 0xf0000000)) {
                        imm <<= 4;
                        rol += 2;
                }

                if (!(imm & 0xc0000000)) {
                        imm <<= 2;
                        rol += 1;
                }

                if (!(imm & 0x00ffffff))
                        imm2 = SRC2_IMM | (imm >> 24) | ((rol & 0xf) << 8);
                else
                        return 0;
        }
        else {
                if (!(imm & 0xf0000000)) {
                        imm <<= 4;
                        rol += 2;
                }

                if (!(imm & 0xc0000000)) {
                        imm <<= 2;
                        rol += 1;
                }

                imm1 = SRC2_IMM | ((imm >> 24) & 0xff) | ((rol & 0xf) << 8);
                imm <<= 8;
                rol += 4;

                if (!(imm & 0xf0000000)) {
                        imm <<= 4;
                        rol += 2;
                }

                if (!(imm & 0xc0000000)) {
                        imm <<= 2;
                        rol += 1;
                }

                if (!(imm & 0x00ffffff))
                        imm2 = SRC2_IMM | (imm >> 24) | ((rol & 0xf) << 8);
                else
                        return 0;
        }

        EMIT_INSTRUCTION(EMIT_DATA_PROCESS_INS(positive ? MOV_DP : MVN_DP, 0, reg, SLJIT_UNUSED, imm1));
        EMIT_INSTRUCTION(EMIT_DATA_PROCESS_INS(positive ? ORR_DP : BIC_DP, 0, reg, reg, imm2));
        return 1;
}
#endif

static sljit_si load_immediate(struct sljit_compiler *compiler, sljit_si reg, sljit_uw imm)
{
        sljit_uw tmp;

#if (defined SLJIT_CONFIG_ARM_V7 && SLJIT_CONFIG_ARM_V7)
        if (!(imm & ~0xffff))
                return push_inst(compiler, MOVW | RD(reg) | ((imm << 4) & 0xf0000) | (imm & 0xfff));
#endif

        /* Create imm by 1 inst. */
        tmp = get_imm(imm);
        if (tmp) {
                EMIT_INSTRUCTION(EMIT_DATA_PROCESS_INS(MOV_DP, 0, reg, SLJIT_UNUSED, tmp));
                return SLJIT_SUCCESS;
        }

        tmp = get_imm(~imm);
        if (tmp) {
                EMIT_INSTRUCTION(EMIT_DATA_PROCESS_INS(MVN_DP, 0, reg, SLJIT_UNUSED, tmp));
                return SLJIT_SUCCESS;
        }

#if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
        /* Create imm by 2 inst. */
        FAIL_IF(generate_int(compiler, reg, imm, 1));
        FAIL_IF(generate_int(compiler, reg, ~imm, 0));

        /* Load integer. */
        return push_inst_with_literal(compiler, EMIT_DATA_TRANSFER(WORD_DATA | LOAD_DATA, 1, 0, reg, TMP_PC, 0), imm);
#else
        return emit_imm(compiler, reg, imm);
#endif
}

/* Helper function. Dst should be reg + value, using at most 1 instruction, flags does not set. */
static sljit_si emit_set_delta(struct sljit_compiler *compiler, sljit_si dst, sljit_si reg, sljit_sw value)
{
        if (value >= 0) {
                value = get_imm(value);
                if (value)
                        return push_inst(compiler, EMIT_DATA_PROCESS_INS(ADD_DP, 0, dst, reg, value));
        }
        else {
                value = get_imm(-value);
                if (value)
                        return push_inst(compiler, EMIT_DATA_PROCESS_INS(SUB_DP, 0, dst, reg, value));
        }
        return SLJIT_ERR_UNSUPPORTED;
}

/* Can perform an operation using at most 1 instruction. */
static sljit_si getput_arg_fast(struct sljit_compiler *compiler, sljit_si inp_flags, sljit_si reg, sljit_si arg, sljit_sw argw)
{
        sljit_uw imm;

        if (arg & SLJIT_IMM) {
                imm = get_imm(argw);
                if (imm) {
                        if (inp_flags & ARG_TEST)
                                return 1;
                        EMIT_INSTRUCTION(EMIT_DATA_PROCESS_INS(MOV_DP, 0, reg, SLJIT_UNUSED, imm));
                        return -1;
                }
                imm = get_imm(~argw);
                if (imm) {
                        if (inp_flags & ARG_TEST)
                                return 1;
                        EMIT_INSTRUCTION(EMIT_DATA_PROCESS_INS(MVN_DP, 0, reg, SLJIT_UNUSED, imm));
                        return -1;
                }
                return (inp_flags & ARG_TEST) ? SLJIT_SUCCESS : 0;
        }

        SLJIT_ASSERT(arg & SLJIT_MEM);

        /* Fast loads/stores. */
        if (arg & 0xf) {
                if (!(arg & 0xf0)) {
                        if (IS_TYPE1_TRANSFER(inp_flags)) {
                                if (argw >= 0 && argw <= 0xfff) {
                                        if (inp_flags & ARG_TEST)
                                                return 1;
                                        EMIT_INSTRUCTION(EMIT_DATA_TRANSFER(inp_flags, 1, inp_flags & WRITE_BACK, reg, arg & 0xf, argw));
                                        return -1;
                                }
                                if (argw < 0 && argw >= -0xfff) {
                                        if (inp_flags & ARG_TEST)
                                                return 1;
                                        EMIT_INSTRUCTION(EMIT_DATA_TRANSFER(inp_flags, 0, inp_flags & WRITE_BACK, reg, arg & 0xf, -argw));
                                        return -1;
                                }
                        }
                        else {
                                if (argw >= 0 && argw <= 0xff) {
                                        if (inp_flags & ARG_TEST)
                                                return 1;
                                        EMIT_INSTRUCTION(EMIT_DATA_TRANSFER(inp_flags, 1, inp_flags & WRITE_BACK, reg, arg & 0xf, TYPE2_TRANSFER_IMM(argw)));
                                        return -1;
                                }
                                if (argw < 0 && argw >= -0xff) {
                                        if (inp_flags & ARG_TEST)
                                                return 1;
                                        argw = -argw;
                                        EMIT_INSTRUCTION(EMIT_DATA_TRANSFER(inp_flags, 0, inp_flags & WRITE_BACK, reg, arg & 0xf, TYPE2_TRANSFER_IMM(argw)));
                                        return -1;
                                }
                        }
                }
                else if ((argw & 0x3) == 0 || IS_TYPE1_TRANSFER(inp_flags)) {
                        if (inp_flags & ARG_TEST)
                                return 1;
                        EMIT_INSTRUCTION(EMIT_DATA_TRANSFER(inp_flags, 1, inp_flags & WRITE_BACK, reg, arg & 0xf,
                                RM((arg >> 4) & 0xf) | (IS_TYPE1_TRANSFER(inp_flags) ? SRC2_IMM : 0) | ((argw & 0x3) << 7)));
                        return -1;
                }
        }

        return (inp_flags & ARG_TEST) ? SLJIT_SUCCESS : 0;
}

/* See getput_arg below.
   Note: can_cache is called only for binary operators. Those
   operators always uses word arguments without write back. */
static sljit_si can_cache(sljit_si arg, sljit_sw argw, sljit_si next_arg, sljit_sw next_argw)
{
        /* Immediate caching is not supported as it would be an operation on constant arguments. */
        if (arg & SLJIT_IMM)
                return 0;

        /* Always a simple operation. */
        if (arg & 0xf0)
                return 0;

        if (!(arg & 0xf)) {
                /* Immediate access. */
                if ((next_arg & SLJIT_MEM) && ((sljit_uw)argw - (sljit_uw)next_argw <= 0xfff || (sljit_uw)next_argw - (sljit_uw)argw <= 0xfff))
                        return 1;
                return 0;
        }

        if (argw <= 0xfffff && argw >= -0xfffff)
                return 0;

        if (argw == next_argw && (next_arg & SLJIT_MEM))
                return 1;

        if (arg == next_arg && ((sljit_uw)argw - (sljit_uw)next_argw <= 0xfff || (sljit_uw)next_argw - (sljit_uw)argw <= 0xfff))
                return 1;

        return 0;
}

#define GETPUT_ARG_DATA_TRANSFER(add, wb, target, base, imm) \
        if (max_delta & 0xf00) \
                FAIL_IF(push_inst(compiler, EMIT_DATA_TRANSFER(inp_flags, add, wb, target, base, imm))); \
        else \
                FAIL_IF(push_inst(compiler, EMIT_DATA_TRANSFER(inp_flags, add, wb, target, base, TYPE2_TRANSFER_IMM(imm))));

#define TEST_WRITE_BACK() \
        if (inp_flags & WRITE_BACK) { \
                tmp_r = arg & 0xf; \
                if (reg == tmp_r) { \
                        /* This can only happen for stores */ \
                        /* since ldr reg, [reg, ...]! has no meaning */ \
                        SLJIT_ASSERT(!(inp_flags & LOAD_DATA)); \
                        EMIT_INSTRUCTION(EMIT_DATA_PROCESS_INS(MOV_DP, 0, TMP_REG3, SLJIT_UNUSED, RM(reg))); \
                        reg = TMP_REG3; \
                } \
        }

/* Emit the necessary instructions. See can_cache above. */
static sljit_si getput_arg(struct sljit_compiler *compiler, sljit_si inp_flags, sljit_si reg, sljit_si arg, sljit_sw argw, sljit_si next_arg, sljit_sw next_argw)
{
        sljit_si tmp_r;
        sljit_sw max_delta;
        sljit_sw sign;
        sljit_uw imm;

        if (arg & SLJIT_IMM) {
                SLJIT_ASSERT(inp_flags & LOAD_DATA);
                return load_immediate(compiler, reg, argw);
        }

        SLJIT_ASSERT(arg & SLJIT_MEM);

        tmp_r = (inp_flags & LOAD_DATA) ? reg : TMP_REG3;
        max_delta = IS_TYPE1_TRANSFER(inp_flags) ? 0xfff : 0xff;

        if ((arg & 0xf) == SLJIT_UNUSED) {
                /* Write back is not used. */
                imm = (sljit_uw)(argw - compiler->cache_argw);
                if ((compiler->cache_arg & SLJIT_IMM) && (imm <= (sljit_uw)max_delta || imm >= (sljit_uw)-max_delta)) {
                        if (imm <= (sljit_uw)max_delta) {
                                sign = 1;
                                argw = argw - compiler->cache_argw;
                        }
                        else {
                                sign = 0;
                                argw = compiler->cache_argw - argw;
                        }

                        GETPUT_ARG_DATA_TRANSFER(sign, 0, reg, TMP_REG3, argw);
                        return SLJIT_SUCCESS;
                }

                /* With write back, we can create some sophisticated loads, but
                   it is hard to decide whether we should convert downward (0s) or upward (1s). */
                imm = (sljit_uw)(argw - next_argw);
                if ((next_arg & SLJIT_MEM) && (imm <= (sljit_uw)max_delta || imm >= (sljit_uw)-max_delta)) {
                        SLJIT_ASSERT(inp_flags & LOAD_DATA);

                        compiler->cache_arg = SLJIT_IMM;
                        compiler->cache_argw = argw;
                        tmp_r = TMP_REG3;
                }

                FAIL_IF(load_immediate(compiler, tmp_r, argw));
                GETPUT_ARG_DATA_TRANSFER(1, 0, reg, tmp_r, 0);
                return SLJIT_SUCCESS;
        }

        if (arg & 0xf0) {
                SLJIT_ASSERT((argw & 0x3) && !(max_delta & 0xf00));
                if (inp_flags & WRITE_BACK)
                        tmp_r = arg & 0xf;
                EMIT_INSTRUCTION(EMIT_DATA_PROCESS_INS(ADD_DP, 0, tmp_r, arg & 0xf, RM((arg >> 4) & 0xf) | ((argw & 0x3) << 7)));
                EMIT_INSTRUCTION(EMIT_DATA_TRANSFER(inp_flags, 1, 0, reg, tmp_r, TYPE2_TRANSFER_IMM(0)));
                return SLJIT_SUCCESS;
        }

        imm = (sljit_uw)(argw - compiler->cache_argw);
        if (compiler->cache_arg == arg && imm <= (sljit_uw)max_delta) {
                SLJIT_ASSERT(!(inp_flags & WRITE_BACK));
                GETPUT_ARG_DATA_TRANSFER(1, 0, reg, TMP_REG3, imm);
                return SLJIT_SUCCESS;
        }
        if (compiler->cache_arg == arg && imm >= (sljit_uw)-max_delta) {
                SLJIT_ASSERT(!(inp_flags & WRITE_BACK));
                imm = (sljit_uw)-(sljit_sw)imm;
                GETPUT_ARG_DATA_TRANSFER(0, 0, reg, TMP_REG3, imm);
                return SLJIT_SUCCESS;
        }

        imm = get_imm(argw & ~max_delta);
        if (imm) {
                TEST_WRITE_BACK();
                EMIT_INSTRUCTION(EMIT_DATA_PROCESS_INS(ADD_DP, 0, tmp_r, arg & 0xf, imm));
                GETPUT_ARG_DATA_TRANSFER(1, inp_flags & WRITE_BACK, reg, tmp_r, argw & max_delta);
                return SLJIT_SUCCESS;
        }

        imm = get_imm(-argw & ~max_delta);
        if (imm) {
                argw = -argw;
                TEST_WRITE_BACK();
                EMIT_INSTRUCTION(EMIT_DATA_PROCESS_INS(SUB_DP, 0, tmp_r, arg & 0xf, imm));
                GETPUT_ARG_DATA_TRANSFER(0, inp_flags & WRITE_BACK, reg, tmp_r, argw & max_delta);
                return SLJIT_SUCCESS;
        }

        if ((compiler->cache_arg & SLJIT_IMM) && compiler->cache_argw == argw) {
                TEST_WRITE_BACK();
                EMIT_INSTRUCTION(EMIT_DATA_TRANSFER(inp_flags, 1, inp_flags & WRITE_BACK, reg, arg & 0xf, RM(TMP_REG3) | (max_delta & 0xf00 ? SRC2_IMM : 0)));
                return SLJIT_SUCCESS;
        }

        if (argw == next_argw && (next_arg & SLJIT_MEM)) {
                SLJIT_ASSERT(inp_flags & LOAD_DATA);
                FAIL_IF(load_immediate(compiler, TMP_REG3, argw));

                compiler->cache_arg = SLJIT_IMM;
                compiler->cache_argw = argw;

                TEST_WRITE_BACK();
                EMIT_INSTRUCTION(EMIT_DATA_TRANSFER(inp_flags, 1, inp_flags & WRITE_BACK, reg, arg & 0xf, RM(TMP_REG3) | (max_delta & 0xf00 ? SRC2_IMM : 0)));
                return SLJIT_SUCCESS;
        }

        imm = (sljit_uw)(argw - next_argw);
        if (arg == next_arg && !(inp_flags & WRITE_BACK) && (imm <= (sljit_uw)max_delta || imm >= (sljit_uw)-max_delta)) {
                SLJIT_ASSERT(inp_flags & LOAD_DATA);
                FAIL_IF(load_immediate(compiler, TMP_REG3, argw));
                EMIT_INSTRUCTION(EMIT_DATA_PROCESS_INS(ADD_DP, 0, TMP_REG3, TMP_REG3, reg_map[arg & 0xf]));

                compiler->cache_arg = arg;
                compiler->cache_argw = argw;

                GETPUT_ARG_DATA_TRANSFER(1, 0, reg, TMP_REG3, 0);
                return SLJIT_SUCCESS;
        }

        if ((arg & 0xf) == tmp_r) {
                compiler->cache_arg = SLJIT_IMM;
                compiler->cache_argw = argw;
                tmp_r = TMP_REG3;
        }

        FAIL_IF(load_immediate(compiler, tmp_r, argw));
        EMIT_INSTRUCTION(EMIT_DATA_TRANSFER(inp_flags, 1, inp_flags & WRITE_BACK, reg, arg & 0xf, reg_map[tmp_r] | (max_delta & 0xf00 ? SRC2_IMM : 0)));
        return SLJIT_SUCCESS;
}

static SLJIT_INLINE sljit_si emit_op_mem(struct sljit_compiler *compiler, sljit_si flags, sljit_si reg, sljit_si arg, sljit_sw argw)
{
        if (getput_arg_fast(compiler, flags, reg, arg, argw))
                return compiler->error;
        compiler->cache_arg = 0;
        compiler->cache_argw = 0;
        return getput_arg(compiler, flags, reg, arg, argw, 0, 0);
}

static SLJIT_INLINE sljit_si emit_op_mem2(struct sljit_compiler *compiler, sljit_si flags, sljit_si reg, sljit_si arg1, sljit_sw arg1w, sljit_si arg2, sljit_sw arg2w)
{
        if (getput_arg_fast(compiler, flags, reg, arg1, arg1w))
                return compiler->error;
        return getput_arg(compiler, flags, reg, arg1, arg1w, arg2, arg2w);
}

static sljit_si emit_op(struct sljit_compiler *compiler, sljit_si op, sljit_si inp_flags,
        sljit_si dst, sljit_sw dstw,
        sljit_si src1, sljit_sw src1w,
        sljit_si src2, sljit_sw src2w)
{
        /* arg1 goes to TMP_REG1 or src reg
           arg2 goes to TMP_REG2, imm or src reg
           TMP_REG3 can be used for caching
           result goes to TMP_REG2, so put result can use TMP_REG1 and TMP_REG3. */

        /* We prefers register and simple consts. */
        sljit_si dst_r;
        sljit_si src1_r;
        sljit_si src2_r = 0;
        sljit_si sugg_src2_r = TMP_REG2;
        sljit_si flags = GET_FLAGS(op) ? SET_FLAGS : 0;

        compiler->cache_arg = 0;
        compiler->cache_argw = 0;

        /* Destination check. */
        if (SLJIT_UNLIKELY(dst == SLJIT_UNUSED)) {
                if (op >= SLJIT_MOV && op <= SLJIT_MOVU_SI && !(src2 & SLJIT_MEM))
                        return SLJIT_SUCCESS;
                dst_r = TMP_REG2;
        }
        else if (dst <= TMP_REG3) {
                dst_r = dst;
                flags |= REG_DEST;
                if (op >= SLJIT_MOV && op <= SLJIT_MOVU_SI)
                        sugg_src2_r = dst_r;
        }
        else {
                SLJIT_ASSERT(dst & SLJIT_MEM);
                if (getput_arg_fast(compiler, inp_flags | ARG_TEST, TMP_REG2, dst, dstw)) {
                        flags |= FAST_DEST;
                        dst_r = TMP_REG2;
                }
                else {
                        flags |= SLOW_DEST;
                        dst_r = 0;
                }
        }

        /* Source 1. */
        if (src1 <= TMP_REG3)
                src1_r = src1;
        else if (src2 <= TMP_REG3) {
                flags |= ARGS_SWAPPED;
                src1_r = src2;
                src2 = src1;
                src2w = src1w;
        }
        else do { /* do { } while(0) is used because of breaks. */
                src1_r = 0;
                if ((inp_flags & ALLOW_ANY_IMM) && (src1 & SLJIT_IMM)) {
                        /* The second check will generate a hit. */
                        src2_r = get_imm(src1w);
                        if (src2_r) {
                                flags |= ARGS_SWAPPED;
                                src1 = src2;
                                src1w = src2w;
                                break;
                        }
                        if (inp_flags & ALLOW_INV_IMM) {
                                src2_r = get_imm(~src1w);
                                if (src2_r) {
                                        flags |= ARGS_SWAPPED | INV_IMM;
                                        src1 = src2;
                                        src1w = src2w;
                                        break;
                                }
                        }
                        if (GET_OPCODE(op) == SLJIT_ADD) {
                                src2_r = get_imm(-src1w);
                                if (src2_r) {
                                        /* Note: ARGS_SWAPPED is intentionally not applied! */
                                        src1 = src2;
                                        src1w = src2w;
                                        op = SLJIT_SUB | GET_ALL_FLAGS(op);
                                        break;
                                }
                        }
                }

                if (getput_arg_fast(compiler, inp_flags | LOAD_DATA, TMP_REG1, src1, src1w)) {
                        FAIL_IF(compiler->error);
                        src1_r = TMP_REG1;
                }
        } while (0);

        /* Source 2. */
        if (src2_r == 0) {
                if (src2 <= TMP_REG3) {
                        src2_r = src2;
                        flags |= REG_SOURCE;
                        if (!(flags & REG_DEST) && op >= SLJIT_MOV && op <= SLJIT_MOVU_SI)
                                dst_r = src2_r;
                }
                else do { /* do { } while(0) is used because of breaks. */
                        if ((inp_flags & ALLOW_ANY_IMM) && (src2 & SLJIT_IMM)) {
                                src2_r = get_imm(src2w);
                                if (src2_r)
                                        break;
                                if (inp_flags & ALLOW_INV_IMM) {
                                        src2_r = get_imm(~src2w);
                                        if (src2_r) {
                                                flags |= INV_IMM;
                                                break;
                                        }
                                }
                                if (GET_OPCODE(op) == SLJIT_ADD) {
                                        src2_r = get_imm(-src2w);
                                        if (src2_r) {
                                                op = SLJIT_SUB | GET_ALL_FLAGS(op);
                                                flags &= ~ARGS_SWAPPED;
                                                break;
                                        }
                                }
                                if (GET_OPCODE(op) == SLJIT_SUB && !(flags & ARGS_SWAPPED)) {
                                        src2_r = get_imm(-src2w);
                                        if (src2_r) {
                                                op = SLJIT_ADD | GET_ALL_FLAGS(op);
                                                flags &= ~ARGS_SWAPPED;
                                                break;
                                        }
                                }
                        }

                        /* src2_r is 0. */
                        if (getput_arg_fast(compiler, inp_flags | LOAD_DATA, sugg_src2_r, src2, src2w)) {
                                FAIL_IF(compiler->error);
                                src2_r = sugg_src2_r;
                        }
                } while (0);
        }

        /* src1_r, src2_r and dst_r can be zero (=unprocessed) or non-zero.
           If they are zero, they must not be registers. */
        if (src1_r == 0 && src2_r == 0 && dst_r == 0) {
                if (!can_cache(src1, src1w, src2, src2w) && can_cache(src1, src1w, dst, dstw)) {
                        SLJIT_ASSERT(!(flags & ARGS_SWAPPED));
                        flags |= ARGS_SWAPPED;
                        FAIL_IF(getput_arg(compiler, inp_flags | LOAD_DATA, TMP_REG1, src2, src2w, src1, src1w));
                        FAIL_IF(getput_arg(compiler, inp_flags | LOAD_DATA, TMP_REG2, src1, src1w, dst, dstw));
                }
                else {
                        FAIL_IF(getput_arg(compiler, inp_flags | LOAD_DATA, TMP_REG1, src1, src1w, src2, src2w));
                        FAIL_IF(getput_arg(compiler, inp_flags | LOAD_DATA, TMP_REG2, src2, src2w, dst, dstw));
                }
                src1_r = TMP_REG1;
                src2_r = TMP_REG2;
        }
        else if (src1_r == 0 && src2_r == 0) {
                FAIL_IF(getput_arg(compiler, inp_flags | LOAD_DATA, TMP_REG1, src1, src1w, src2, src2w));
                src1_r = TMP_REG1;
        }
        else if (src1_r == 0 && dst_r == 0) {
                FAIL_IF(getput_arg(compiler, inp_flags | LOAD_DATA, TMP_REG1, src1, src1w, dst, dstw));
                src1_r = TMP_REG1;
        }
        else if (src2_r == 0 && dst_r == 0) {
                FAIL_IF(getput_arg(compiler, inp_flags | LOAD_DATA, sugg_src2_r, src2, src2w, dst, dstw));
                src2_r = sugg_src2_r;
        }

        if (dst_r == 0)
                dst_r = TMP_REG2;

        if (src1_r == 0) {
                FAIL_IF(getput_arg(compiler, inp_flags | LOAD_DATA, TMP_REG1, src1, src1w, 0, 0));
                src1_r = TMP_REG1;
        }

        if (src2_r == 0) {
                FAIL_IF(getput_arg(compiler, inp_flags | LOAD_DATA, sugg_src2_r, src2, src2w, 0, 0));
                src2_r = sugg_src2_r;
        }

        FAIL_IF(emit_single_op(compiler, op, flags, dst_r, src1_r, src2_r));

        if (flags & (FAST_DEST | SLOW_DEST)) {
                if (flags & FAST_DEST)
                        FAIL_IF(getput_arg_fast(compiler, inp_flags, dst_r, dst, dstw));
                else
                        FAIL_IF(getput_arg(compiler, inp_flags, dst_r, dst, dstw, 0, 0));
        }
        return SLJIT_SUCCESS;
}

#ifdef __cplusplus
extern "C" {
#endif

#if defined(__GNUC__)
extern unsigned int __aeabi_uidivmod(unsigned int numerator, unsigned int denominator);
extern int __aeabi_idivmod(int numerator, int denominator);
#else
#error "Software divmod functions are needed"
#endif

#ifdef __cplusplus
}
#endif

SLJIT_API_FUNC_ATTRIBUTE sljit_si sljit_emit_op0(struct sljit_compiler *compiler, sljit_si op)
{
        CHECK_ERROR();
        check_sljit_emit_op0(compiler, op);

        op = GET_OPCODE(op);
        switch (op) {
        case SLJIT_BREAKPOINT:
                EMIT_INSTRUCTION(BKPT);
                break;
        case SLJIT_NOP:
                EMIT_INSTRUCTION(NOP);
                break;
        case SLJIT_UMUL:
        case SLJIT_SMUL:
#if (defined SLJIT_CONFIG_ARM_V7 && SLJIT_CONFIG_ARM_V7)
                return push_inst(compiler, (op == SLJIT_UMUL ? UMULL : SMULL)
                        | (reg_map[SLJIT_SCRATCH_REG2] << 16)
                        | (reg_map[SLJIT_SCRATCH_REG1] << 12)
                        | (reg_map[SLJIT_SCRATCH_REG1] << 8)
                        | reg_map[SLJIT_SCRATCH_REG2]);
#else
                EMIT_INSTRUCTION(EMIT_DATA_PROCESS_INS(MOV_DP, 0, TMP_REG1, SLJIT_UNUSED, RM(SLJIT_SCRATCH_REG2)));
                return push_inst(compiler, (op == SLJIT_UMUL ? UMULL : SMULL)
                        | (reg_map[SLJIT_SCRATCH_REG2] << 16)
                        | (reg_map[SLJIT_SCRATCH_REG1] << 12)
                        | (reg_map[SLJIT_SCRATCH_REG1] << 8)
                        | reg_map[TMP_REG1]);
#endif
        case SLJIT_UDIV:
        case SLJIT_SDIV:
                if (compiler->scratches >= 3)
                        EMIT_INSTRUCTION(0xe52d2008 /* str r2, [sp, #-8]! */);
#if defined(__GNUC__)
                FAIL_IF(sljit_emit_ijump(compiler, SLJIT_FAST_CALL, SLJIT_IMM,
                        (op == SLJIT_UDIV ? SLJIT_FUNC_OFFSET(__aeabi_uidivmod) : SLJIT_FUNC_OFFSET(__aeabi_idivmod))));
#else
#error "Software divmod functions are needed"
#endif
                if (compiler->scratches >= 3)
                        return push_inst(compiler, 0xe49d2008 /* ldr r2, [sp], #8 */);
                return SLJIT_SUCCESS;
        }

        return SLJIT_SUCCESS;
}

SLJIT_API_FUNC_ATTRIBUTE sljit_si sljit_emit_op1(struct sljit_compiler *compiler, sljit_si op,
        sljit_si dst, sljit_sw dstw,
        sljit_si src, sljit_sw srcw)
{
        CHECK_ERROR();
        check_sljit_emit_op1(compiler, op, dst, dstw, src, srcw);
        ADJUST_LOCAL_OFFSET(dst, dstw);
        ADJUST_LOCAL_OFFSET(src, srcw);

        switch (GET_OPCODE(op)) {
        case SLJIT_MOV:
        case SLJIT_MOV_UI:
        case SLJIT_MOV_SI:
        case SLJIT_MOV_P:
                return emit_op(compiler, SLJIT_MOV, ALLOW_ANY_IMM, dst, dstw, TMP_REG1, 0, src, srcw);

        case SLJIT_MOV_UB:
                return emit_op(compiler, SLJIT_MOV_UB, ALLOW_ANY_IMM | BYTE_DATA, dst, dstw, TMP_REG1, 0, src, (src & SLJIT_IMM) ? (sljit_ub)srcw : srcw);

        case SLJIT_MOV_SB:
                return emit_op(compiler, SLJIT_MOV_SB, ALLOW_ANY_IMM | SIGNED_DATA | BYTE_DATA, dst, dstw, TMP_REG1, 0, src, (src & SLJIT_IMM) ? (sljit_sb)srcw : srcw);

        case SLJIT_MOV_UH:
                return emit_op(compiler, SLJIT_MOV_UH, ALLOW_ANY_IMM | HALF_DATA, dst, dstw, TMP_REG1, 0, src, (src & SLJIT_IMM) ? (sljit_uh)srcw : srcw);

        case SLJIT_MOV_SH:
                return emit_op(compiler, SLJIT_MOV_SH, ALLOW_ANY_IMM | SIGNED_DATA | HALF_DATA, dst, dstw, TMP_REG1, 0, src, (src & SLJIT_IMM) ? (sljit_sh)srcw : srcw);

        case SLJIT_MOVU:
        case SLJIT_MOVU_UI:
        case SLJIT_MOVU_SI:
        case SLJIT_MOVU_P:
                return emit_op(compiler, SLJIT_MOV, ALLOW_ANY_IMM | WRITE_BACK, dst, dstw, TMP_REG1, 0, src, srcw);

        case SLJIT_MOVU_UB:
                return emit_op(compiler, SLJIT_MOV_UB, ALLOW_ANY_IMM | BYTE_DATA | WRITE_BACK, dst, dstw, TMP_REG1, 0, src, (src & SLJIT_IMM) ? (sljit_ub)srcw : srcw);

        case SLJIT_MOVU_SB:
                return emit_op(compiler, SLJIT_MOV_SB, ALLOW_ANY_IMM | SIGNED_DATA | BYTE_DATA | WRITE_BACK, dst, dstw, TMP_REG1, 0, src, (src & SLJIT_IMM) ? (sljit_sb)srcw : srcw);

        case SLJIT_MOVU_UH:
                return emit_op(compiler, SLJIT_MOV_UH, ALLOW_ANY_IMM | HALF_DATA | WRITE_BACK, dst, dstw, TMP_REG1, 0, src, (src & SLJIT_IMM) ? (sljit_uh)srcw : srcw);

        case SLJIT_MOVU_SH:
                return emit_op(compiler, SLJIT_MOV_SH, ALLOW_ANY_IMM | SIGNED_DATA | HALF_DATA | WRITE_BACK, dst, dstw, TMP_REG1, 0, src, (src & SLJIT_IMM) ? (sljit_sh)srcw : srcw);

        case SLJIT_NOT:
                return emit_op(compiler, op, ALLOW_ANY_IMM, dst, dstw, TMP_REG1, 0, src, srcw);

        case SLJIT_NEG:
#if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) || (defined SLJIT_DEBUG && SLJIT_DEBUG)
                compiler->skip_checks = 1;
#endif
                return sljit_emit_op2(compiler, SLJIT_SUB | GET_ALL_FLAGS(op), dst, dstw, SLJIT_IMM, 0, src, srcw);

        case SLJIT_CLZ:
                return emit_op(compiler, op, 0, dst, dstw, TMP_REG1, 0, src, srcw);
        }

        return SLJIT_SUCCESS;
}

SLJIT_API_FUNC_ATTRIBUTE sljit_si sljit_emit_op2(struct sljit_compiler *compiler, sljit_si op,
        sljit_si dst, sljit_sw dstw,
        sljit_si src1, sljit_sw src1w,
        sljit_si src2, sljit_sw src2w)
{
        CHECK_ERROR();
        check_sljit_emit_op2(compiler, op, dst, dstw, src1, src1w, src2, src2w);
        ADJUST_LOCAL_OFFSET(dst, dstw);
        ADJUST_LOCAL_OFFSET(src1, src1w);
        ADJUST_LOCAL_OFFSET(src2, src2w);

        switch (GET_OPCODE(op)) {
        case SLJIT_ADD:
        case SLJIT_ADDC:
        case SLJIT_SUB:
        case SLJIT_SUBC:
        case SLJIT_OR:
        case SLJIT_XOR:
                return emit_op(compiler, op, ALLOW_IMM, dst, dstw, src1, src1w, src2, src2w);

        case SLJIT_MUL:
                return emit_op(compiler, op, 0, dst, dstw, src1, src1w, src2, src2w);

        case SLJIT_AND:
                return emit_op(compiler, op, ALLOW_ANY_IMM, dst, dstw, src1, src1w, src2, src2w);

        case SLJIT_SHL:
        case SLJIT_LSHR:
        case SLJIT_ASHR:
                if (src2 & SLJIT_IMM) {
                        compiler->shift_imm = src2w & 0x1f;
                        return emit_op(compiler, op, 0, dst, dstw, TMP_REG1, 0, src1, src1w);
                }
                else {
                        compiler->shift_imm = 0x20;
                        return emit_op(compiler, op, 0, dst, dstw, src1, src1w, src2, src2w);
                }
        }

        return SLJIT_SUCCESS;
}

SLJIT_API_FUNC_ATTRIBUTE sljit_si sljit_get_register_index(sljit_si reg)
{
        check_sljit_get_register_index(reg);
        return reg_map[reg];
}

SLJIT_API_FUNC_ATTRIBUTE sljit_si sljit_get_float_register_index(sljit_si reg)
{
        check_sljit_get_float_register_index(reg);
        return reg;
}

SLJIT_API_FUNC_ATTRIBUTE sljit_si sljit_emit_op_custom(struct sljit_compiler *compiler,
        void *instruction, sljit_si size)
{
        CHECK_ERROR();
        check_sljit_emit_op_custom(compiler, instruction, size);
        SLJIT_ASSERT(size == 4);

        return push_inst(compiler, *(sljit_uw*)instruction);
}

/* --------------------------------------------------------------------- */
/*  Floating point operators                                             */
/* --------------------------------------------------------------------- */

#if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)

/* 0 - no fpu
   1 - vfp */
static sljit_si arm_fpu_type = -1;

static void init_compiler(void)
{
        if (arm_fpu_type != -1)
                return;

        /* TODO: Only the OS can help to determine the correct fpu type. */
        arm_fpu_type = 1;
}

SLJIT_API_FUNC_ATTRIBUTE sljit_si sljit_is_fpu_available(void)
{
        if (arm_fpu_type == -1)
                init_compiler();
        return arm_fpu_type;
}

#else

#define arm_fpu_type 1

SLJIT_API_FUNC_ATTRIBUTE sljit_si sljit_is_fpu_available(void)
{
        /* Always available. */
        return 1;
}

#endif

#define FPU_LOAD (1 << 20)
#define EMIT_FPU_DATA_TRANSFER(inst, add, base, freg, offs) \
        ((inst) | ((add) << 23) | (reg_map[base] << 16) | (freg << 12) | (offs))
#define EMIT_FPU_OPERATION(opcode, mode, dst, src1, src2) \
        ((opcode) | (mode) | ((dst) << 12) | (src1) | ((src2) << 16))

static sljit_si emit_fop_mem(struct sljit_compiler *compiler, sljit_si flags, sljit_si reg, sljit_si arg, sljit_sw argw)
{
        sljit_sw tmp;
        sljit_uw imm;
        sljit_sw inst = VSTR_F32 | (flags & (SLJIT_SINGLE_OP | FPU_LOAD));
        SLJIT_ASSERT(arg & SLJIT_MEM);

        if (SLJIT_UNLIKELY(arg & 0xf0)) {
                EMIT_INSTRUCTION(EMIT_DATA_PROCESS_INS(ADD_DP, 0, TMP_REG1, arg & 0xf, RM((arg >> 4) & 0xf) | ((argw & 0x3) << 7)));
                arg = SLJIT_MEM | TMP_REG1;
                argw = 0;
        }

        /* Fast loads and stores. */
        if ((arg & 0xf)) {
                if (!(argw & ~0x3fc))
                        return push_inst(compiler, EMIT_FPU_DATA_TRANSFER(inst, 1, arg & 0xf, reg, argw >> 2));
                if (!(-argw & ~0x3fc))
                        return push_inst(compiler, EMIT_FPU_DATA_TRANSFER(inst, 0, arg & 0xf, reg, (-argw) >> 2));
        }

        if (compiler->cache_arg == arg) {
                tmp = argw - compiler->cache_argw;
                if (!(tmp & ~0x3fc))
                        return push_inst(compiler, EMIT_FPU_DATA_TRANSFER(inst, 1, TMP_REG3, reg, tmp >> 2));
                if (!(-tmp & ~0x3fc))
                        return push_inst(compiler, EMIT_FPU_DATA_TRANSFER(inst, 0, TMP_REG3, reg, -tmp >> 2));
                if (emit_set_delta(compiler, TMP_REG3, TMP_REG3, tmp) != SLJIT_ERR_UNSUPPORTED) {
                        FAIL_IF(compiler->error);
                        compiler->cache_argw = argw;
                        return push_inst(compiler, EMIT_FPU_DATA_TRANSFER(inst, 1, TMP_REG3, reg, 0));
                }
        }

        if (arg & 0xf) {
                if (emit_set_delta(compiler, TMP_REG1, arg & 0xf, argw) != SLJIT_ERR_UNSUPPORTED) {
                        FAIL_IF(compiler->error);
                        return push_inst(compiler, EMIT_FPU_DATA_TRANSFER(inst, 1, TMP_REG1, reg, 0));
                }
                imm = get_imm(argw & ~0x3fc);
                if (imm) {
                        EMIT_INSTRUCTION(EMIT_DATA_PROCESS_INS(ADD_DP, 0, TMP_REG1, arg & 0xf, imm));
                        return push_inst(compiler, EMIT_FPU_DATA_TRANSFER(inst, 1, TMP_REG1, reg, (argw & 0x3fc) >> 2));
                }
                imm = get_imm(-argw & ~0x3fc);
                if (imm) {
                        argw = -argw;
                        EMIT_INSTRUCTION(EMIT_DATA_PROCESS_INS(SUB_DP, 0, TMP_REG1, arg & 0xf, imm));
                        return push_inst(compiler, EMIT_FPU_DATA_TRANSFER(inst, 0, TMP_REG1, reg, (argw & 0x3fc) >> 2));
                }
        }

        compiler->cache_arg = arg;
        compiler->cache_argw = argw;
        if (arg & 0xf) {
                FAIL_IF(load_immediate(compiler, TMP_REG1, argw));
                EMIT_INSTRUCTION(EMIT_DATA_PROCESS_INS(ADD_DP, 0, TMP_REG3, arg & 0xf, reg_map[TMP_REG1]));
        }
        else
                FAIL_IF(load_immediate(compiler, TMP_REG3, argw));

        return push_inst(compiler, EMIT_FPU_DATA_TRANSFER(inst, 1, TMP_REG3, reg, 0));
}

SLJIT_API_FUNC_ATTRIBUTE sljit_si sljit_emit_fop1(struct sljit_compiler *compiler, sljit_si op,
        sljit_si dst, sljit_sw dstw,
        sljit_si src, sljit_sw srcw)
{
        sljit_si dst_fr;

        CHECK_ERROR();
        check_sljit_emit_fop1(compiler, op, dst, dstw, src, srcw);
        SLJIT_COMPILE_ASSERT((SLJIT_SINGLE_OP == 0x100), float_transfer_bit_error);

        compiler->cache_arg = 0;
        compiler->cache_argw = 0;
        op ^= SLJIT_SINGLE_OP;

        if (GET_OPCODE(op) == SLJIT_CMPD) {
                if (dst > SLJIT_FLOAT_REG6) {
                        FAIL_IF(emit_fop_mem(compiler, (op & SLJIT_SINGLE_OP) | FPU_LOAD, TMP_FREG1, dst, dstw));
                        dst = TMP_FREG1;
                }
                if (src > SLJIT_FLOAT_REG6) {
                        FAIL_IF(emit_fop_mem(compiler, (op & SLJIT_SINGLE_OP) | FPU_LOAD, TMP_FREG2, src, srcw));
                        src = TMP_FREG2;
                }
                EMIT_INSTRUCTION(EMIT_FPU_OPERATION(VCMP_F32, op & SLJIT_SINGLE_OP, dst, src, 0));
                EMIT_INSTRUCTION(VMRS);
                return SLJIT_SUCCESS;
        }

        dst_fr = (dst > SLJIT_FLOAT_REG6) ? TMP_FREG1 : dst;

        if (src > SLJIT_FLOAT_REG6) {
                FAIL_IF(emit_fop_mem(compiler, (op & SLJIT_SINGLE_OP) | FPU_LOAD, dst_fr, src, srcw));
                src = dst_fr;
        }

        switch (GET_OPCODE(op)) {
                case SLJIT_MOVD:
                        if (src != dst_fr && dst_fr != TMP_FREG1)
                                EMIT_INSTRUCTION(EMIT_FPU_OPERATION(VMOV_F32, op & SLJIT_SINGLE_OP, dst_fr, src, 0));
                        break;
                case SLJIT_NEGD:
                        EMIT_INSTRUCTION(EMIT_FPU_OPERATION(VNEG_F32, op & SLJIT_SINGLE_OP, dst_fr, src, 0));
                        break;
                case SLJIT_ABSD:
                        EMIT_INSTRUCTION(EMIT_FPU_OPERATION(VABS_F32, op & SLJIT_SINGLE_OP, dst_fr, src, 0));
                        break;
        }

        if (dst_fr == TMP_FREG1) {
                if (GET_OPCODE(op) == SLJIT_MOVD)
                        dst_fr = src;
                FAIL_IF(emit_fop_mem(compiler, (op & SLJIT_SINGLE_OP), dst_fr, dst, dstw));
        }

        return SLJIT_SUCCESS;
}

SLJIT_API_FUNC_ATTRIBUTE sljit_si sljit_emit_fop2(struct sljit_compiler *compiler, sljit_si op,
        sljit_si dst, sljit_sw dstw,
        sljit_si src1, sljit_sw src1w,
        sljit_si src2, sljit_sw src2w)
{
        sljit_si dst_fr;

        CHECK_ERROR();
        check_sljit_emit_fop2(compiler, op, dst, dstw, src1, src1w, src2, src2w);

        compiler->cache_arg = 0;
        compiler->cache_argw = 0;
        op ^= SLJIT_SINGLE_OP;

        dst_fr = (dst > SLJIT_FLOAT_REG6) ? TMP_FREG1 : dst;

        if (src2 > SLJIT_FLOAT_REG6) {
                FAIL_IF(emit_fop_mem(compiler, (op & SLJIT_SINGLE_OP) | FPU_LOAD, TMP_FREG2, src2, src2w));
                src2 = TMP_FREG2;
        }

        if (src1 > SLJIT_FLOAT_REG6) {
                FAIL_IF(emit_fop_mem(compiler, (op & SLJIT_SINGLE_OP) | FPU_LOAD, TMP_FREG1, src1, src1w));
                src1 = TMP_FREG1;
        }

        switch (GET_OPCODE(op)) {
        case SLJIT_ADDD:
                EMIT_INSTRUCTION(EMIT_FPU_OPERATION(VADD_F32, op & SLJIT_SINGLE_OP, dst_fr, src2, src1));
                break;

        case SLJIT_SUBD:
                EMIT_INSTRUCTION(EMIT_FPU_OPERATION(VSUB_F32, op & SLJIT_SINGLE_OP, dst_fr, src2, src1));
                break;

        case SLJIT_MULD:
                EMIT_INSTRUCTION(EMIT_FPU_OPERATION(VMUL_F32, op & SLJIT_SINGLE_OP, dst_fr, src2, src1));
                break;

        case SLJIT_DIVD:
                EMIT_INSTRUCTION(EMIT_FPU_OPERATION(VDIV_F32, op & SLJIT_SINGLE_OP, dst_fr, src2, src1));
                break;
        }

        if (dst_fr == TMP_FREG1)
                FAIL_IF(emit_fop_mem(compiler, (op & SLJIT_SINGLE_OP), TMP_FREG1, dst, dstw));

        return SLJIT_SUCCESS;
}

#undef FPU_LOAD
#undef EMIT_FPU_DATA_TRANSFER
#undef EMIT_FPU_OPERATION

/* --------------------------------------------------------------------- */
/*  Other instructions                                                   */
/* --------------------------------------------------------------------- */

SLJIT_API_FUNC_ATTRIBUTE sljit_si sljit_emit_fast_enter(struct sljit_compiler *compiler, sljit_si dst, sljit_sw dstw)
{
        CHECK_ERROR();
        check_sljit_emit_fast_enter(compiler, dst, dstw);
        ADJUST_LOCAL_OFFSET(dst, dstw);

        /* For UNUSED dst. Uncommon, but possible. */
        if (dst == SLJIT_UNUSED)
                return SLJIT_SUCCESS;

        if (dst <= TMP_REG3)
                return push_inst(compiler, EMIT_DATA_PROCESS_INS(MOV_DP, 0, dst, SLJIT_UNUSED, RM(TMP_REG3)));

        /* Memory. */
        if (getput_arg_fast(compiler, WORD_DATA, TMP_REG3, dst, dstw))
                return compiler->error;
        /* TMP_REG3 is used for caching. */
        EMIT_INSTRUCTION(EMIT_DATA_PROCESS_INS(MOV_DP, 0, TMP_REG2, SLJIT_UNUSED, RM(TMP_REG3)));
        compiler->cache_arg = 0;
        compiler->cache_argw = 0;
        return getput_arg(compiler, WORD_DATA, TMP_REG2, dst, dstw, 0, 0);
}

SLJIT_API_FUNC_ATTRIBUTE sljit_si sljit_emit_fast_return(struct sljit_compiler *compiler, sljit_si src, sljit_sw srcw)
{
        CHECK_ERROR();
        check_sljit_emit_fast_return(compiler, src, srcw);
        ADJUST_LOCAL_OFFSET(src, srcw);

        if (src <= TMP_REG3)
                EMIT_INSTRUCTION(EMIT_DATA_PROCESS_INS(MOV_DP, 0, TMP_REG3, SLJIT_UNUSED, RM(src)));
        else if (src & SLJIT_MEM) {
                if (getput_arg_fast(compiler, WORD_DATA | LOAD_DATA, TMP_REG3, src, srcw))
                        FAIL_IF(compiler->error);
                else {
                        compiler->cache_arg = 0;
                        compiler->cache_argw = 0;
                        FAIL_IF(getput_arg(compiler, WORD_DATA | LOAD_DATA, TMP_REG2, src, srcw, 0, 0));
                        EMIT_INSTRUCTION(EMIT_DATA_PROCESS_INS(MOV_DP, 0, TMP_REG3, SLJIT_UNUSED, RM(TMP_REG2)));
                }
        }
        else if (src & SLJIT_IMM)
                FAIL_IF(load_immediate(compiler, TMP_REG3, srcw));
        return push_inst(compiler, BLX | RM(TMP_REG3));
}

/* --------------------------------------------------------------------- */
/*  Conditional instructions                                             */
/* --------------------------------------------------------------------- */

static sljit_uw get_cc(sljit_si type)
{
        switch (type) {
        case SLJIT_C_EQUAL:
        case SLJIT_C_MUL_NOT_OVERFLOW:
        case SLJIT_C_FLOAT_EQUAL:
                return 0x00000000;

        case SLJIT_C_NOT_EQUAL:
        case SLJIT_C_MUL_OVERFLOW:
        case SLJIT_C_FLOAT_NOT_EQUAL:
                return 0x10000000;

        case SLJIT_C_LESS:
        case SLJIT_C_FLOAT_LESS:
                return 0x30000000;

        case SLJIT_C_GREATER_EQUAL:
        case SLJIT_C_FLOAT_GREATER_EQUAL:
                return 0x20000000;

        case SLJIT_C_GREATER:
        case SLJIT_C_FLOAT_GREATER:
                return 0x80000000;

        case SLJIT_C_LESS_EQUAL:
        case SLJIT_C_FLOAT_LESS_EQUAL:
                return 0x90000000;

        case SLJIT_C_SIG_LESS:
                return 0xb0000000;

        case SLJIT_C_SIG_GREATER_EQUAL:
                return 0xa0000000;

        case SLJIT_C_SIG_GREATER:
                return 0xc0000000;

        case SLJIT_C_SIG_LESS_EQUAL:
                return 0xd0000000;

        case SLJIT_C_OVERFLOW:
        case SLJIT_C_FLOAT_UNORDERED:
                return 0x60000000;

        case SLJIT_C_NOT_OVERFLOW:
        case SLJIT_C_FLOAT_ORDERED:
                return 0x70000000;

        default: /* SLJIT_JUMP */
                return 0xe0000000;
        }
}

SLJIT_API_FUNC_ATTRIBUTE struct sljit_label* sljit_emit_label(struct sljit_compiler *compiler)
{
        struct sljit_label *label;

        CHECK_ERROR_PTR();
        check_sljit_emit_label(compiler);

        if (compiler->last_label && compiler->last_label->size == compiler->size)
                return compiler->last_label;

        label = (struct sljit_label*)ensure_abuf(compiler, sizeof(struct sljit_label));
        PTR_FAIL_IF(!label);
        set_label(label, compiler);
        return label;
}

SLJIT_API_FUNC_ATTRIBUTE struct sljit_jump* sljit_emit_jump(struct sljit_compiler *compiler, sljit_si type)
{
        struct sljit_jump *jump;

        CHECK_ERROR_PTR();
        check_sljit_emit_jump(compiler, type);

        jump = (struct sljit_jump*)ensure_abuf(compiler, sizeof(struct sljit_jump));
        PTR_FAIL_IF(!jump);
        set_jump(jump, compiler, type & SLJIT_REWRITABLE_JUMP);
        type &= 0xff;

        /* In ARM, we don't need to touch the arguments. */
#if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
        if (type >= SLJIT_FAST_CALL)
                PTR_FAIL_IF(prepare_blx(compiler));
        PTR_FAIL_IF(push_inst_with_unique_literal(compiler, ((EMIT_DATA_TRANSFER(WORD_DATA | LOAD_DATA, 1, 0,
                type <= SLJIT_JUMP ? TMP_PC : TMP_REG1, TMP_PC, 0)) & ~COND_MASK) | get_cc(type), 0));

        if (jump->flags & SLJIT_REWRITABLE_JUMP) {
                jump->addr = compiler->size;
                compiler->patches++;
        }

        if (type >= SLJIT_FAST_CALL) {
                jump->flags |= IS_BL;
                PTR_FAIL_IF(emit_blx(compiler));
        }

        if (!(jump->flags & SLJIT_REWRITABLE_JUMP))
                jump->addr = compiler->size;
#else
        if (type >= SLJIT_FAST_CALL)
                jump->flags |= IS_BL;
        PTR_FAIL_IF(emit_imm(compiler, TMP_REG1, 0));
        PTR_FAIL_IF(push_inst(compiler, (((type <= SLJIT_JUMP ? BX : BLX) | RM(TMP_REG1)) & ~COND_MASK) | get_cc(type)));
        jump->addr = compiler->size;
#endif
        return jump;
}

SLJIT_API_FUNC_ATTRIBUTE sljit_si sljit_emit_ijump(struct sljit_compiler *compiler, sljit_si type, sljit_si src, sljit_sw srcw)
{
        struct sljit_jump *jump;

        CHECK_ERROR();
        check_sljit_emit_ijump(compiler, type, src, srcw);
        ADJUST_LOCAL_OFFSET(src, srcw);

        /* In ARM, we don't need to touch the arguments. */
        if (src & SLJIT_IMM) {
                jump = (struct sljit_jump*)ensure_abuf(compiler, sizeof(struct sljit_jump));
                FAIL_IF(!jump);
                set_jump(jump, compiler, JUMP_ADDR | ((type >= SLJIT_FAST_CALL) ? IS_BL : 0));
                jump->u.target = srcw;

#if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
                if (type >= SLJIT_FAST_CALL)
                        FAIL_IF(prepare_blx(compiler));
                FAIL_IF(push_inst_with_unique_literal(compiler, EMIT_DATA_TRANSFER(WORD_DATA | LOAD_DATA, 1, 0, type <= SLJIT_JUMP ? TMP_PC : TMP_REG1, TMP_PC, 0), 0));
                if (type >= SLJIT_FAST_CALL)
                        FAIL_IF(emit_blx(compiler));
#else
                FAIL_IF(emit_imm(compiler, TMP_REG1, 0));
                FAIL_IF(push_inst(compiler, (type <= SLJIT_JUMP ? BX : BLX) | RM(TMP_REG1)));
#endif
                jump->addr = compiler->size;
        }
        else {
                if (src <= TMP_REG3)
                        return push_inst(compiler, (type <= SLJIT_JUMP ? BX : BLX) | RM(src));

                SLJIT_ASSERT(src & SLJIT_MEM);
                FAIL_IF(emit_op_mem(compiler, WORD_DATA | LOAD_DATA, TMP_REG2, src, srcw));
                return push_inst(compiler, (type <= SLJIT_JUMP ? BX : BLX) | RM(TMP_REG2));
        }

        return SLJIT_SUCCESS;
}

SLJIT_API_FUNC_ATTRIBUTE sljit_si sljit_emit_op_flags(struct sljit_compiler *compiler, sljit_si op,
        sljit_si dst, sljit_sw dstw,
        sljit_si src, sljit_sw srcw,
        sljit_si type)
{
        sljit_si dst_r, flags = GET_ALL_FLAGS(op);
        sljit_uw cc, ins;

        CHECK_ERROR();
        check_sljit_emit_op_flags(compiler, op, dst, dstw, src, srcw, type);
        ADJUST_LOCAL_OFFSET(dst, dstw);
        ADJUST_LOCAL_OFFSET(src, srcw);

        if (dst == SLJIT_UNUSED)
                return SLJIT_SUCCESS;

        op = GET_OPCODE(op);
        cc = get_cc(type);
        dst_r = (dst <= TMP_REG3) ? dst : TMP_REG2;

        if (op < SLJIT_ADD) {
                EMIT_INSTRUCTION(EMIT_DATA_PROCESS_INS(MOV_DP, 0, dst_r, SLJIT_UNUSED, SRC2_IMM | 0));
                EMIT_INSTRUCTION((EMIT_DATA_PROCESS_INS(MOV_DP, 0, dst_r, SLJIT_UNUSED, SRC2_IMM | 1) & ~COND_MASK) | cc);
                return (dst_r == TMP_REG2) ? emit_op_mem(compiler, WORD_DATA, TMP_REG2, dst, dstw) : SLJIT_SUCCESS;
        }

        ins = (op == SLJIT_AND ? AND_DP : (op == SLJIT_OR ? ORR_DP : EOR_DP));
        if ((op == SLJIT_OR || op == SLJIT_XOR) && dst <= TMP_REG3 && dst == src) {
                EMIT_INSTRUCTION((EMIT_DATA_PROCESS_INS(ins, 0, dst, dst, SRC2_IMM | 1) & ~COND_MASK) | cc);
                /* The condition must always be set, even if the ORR/EOR is not executed above. */
                return (flags & SLJIT_SET_E) ? push_inst(compiler, EMIT_DATA_PROCESS_INS(MOV_DP, SET_FLAGS, TMP_REG1, SLJIT_UNUSED, RM(dst))) : SLJIT_SUCCESS;
        }

        compiler->cache_arg = 0;
        compiler->cache_argw = 0;
        if (src & SLJIT_MEM) {
                FAIL_IF(emit_op_mem2(compiler, WORD_DATA | LOAD_DATA, TMP_REG1, src, srcw, dst, dstw));
                src = TMP_REG1;
                srcw = 0;
        } else if (src & SLJIT_IMM) {
                FAIL_IF(load_immediate(compiler, TMP_REG1, srcw));
                src = TMP_REG1;
                srcw = 0;
        }

        EMIT_INSTRUCTION((EMIT_DATA_PROCESS_INS(ins, 0, dst_r, src, SRC2_IMM | 1) & ~COND_MASK) | cc);
        EMIT_INSTRUCTION((EMIT_DATA_PROCESS_INS(ins, 0, dst_r, src, SRC2_IMM | 0) & ~COND_MASK) | (cc ^ 0x10000000));
        if (dst_r == TMP_REG2)
                FAIL_IF(emit_op_mem2(compiler, WORD_DATA, TMP_REG2, dst, dstw, 0, 0));

        return (flags & SLJIT_SET_E) ? push_inst(compiler, EMIT_DATA_PROCESS_INS(MOV_DP, SET_FLAGS, TMP_REG1, SLJIT_UNUSED, RM(dst_r))) : SLJIT_SUCCESS;
}

SLJIT_API_FUNC_ATTRIBUTE struct sljit_const* sljit_emit_const(struct sljit_compiler *compiler, sljit_si dst, sljit_sw dstw, sljit_sw init_value)
{
        struct sljit_const *const_;
        sljit_si reg;

        CHECK_ERROR_PTR();
        check_sljit_emit_const(compiler, dst, dstw, init_value);
        ADJUST_LOCAL_OFFSET(dst, dstw);

        const_ = (struct sljit_const*)ensure_abuf(compiler, sizeof(struct sljit_const));
        PTR_FAIL_IF(!const_);

        reg = (dst <= TMP_REG3) ? dst : TMP_REG2;

#if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
        PTR_FAIL_IF(push_inst_with_unique_literal(compiler, EMIT_DATA_TRANSFER(WORD_DATA | LOAD_DATA, 1, 0, reg, TMP_PC, 0), init_value));
        compiler->patches++;
#else
        PTR_FAIL_IF(emit_imm(compiler, reg, init_value));
#endif
        set_const(const_, compiler);

        if (reg == TMP_REG2 && dst != SLJIT_UNUSED)
                PTR_FAIL_IF(emit_op_mem(compiler, WORD_DATA, TMP_REG2, dst, dstw));
        return const_;
}

SLJIT_API_FUNC_ATTRIBUTE void sljit_set_jump_addr(sljit_uw addr, sljit_uw new_addr)
{
        inline_set_jump_addr(addr, new_addr, 1);
}

SLJIT_API_FUNC_ATTRIBUTE void sljit_set_const(sljit_uw addr, sljit_sw new_constant)
{
        inline_set_const(addr, new_constant, 1);
}