/[pcre]/code/trunk/sljit/sljitNativeMIPS_32.c
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Contents of /code/trunk/sljit/sljitNativeMIPS_32.c

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Revision 740 - (hide annotations) (download)
Mon Oct 31 06:10:14 2011 UTC (2 years, 5 months ago) by zherczeg
File MIME type: text/plain
File size: 16268 byte(s)
Updating the JIT compiler
1 ph10 662 /*
2     * Stack-less Just-In-Time compiler
3     *
4     * Copyright 2009-2010 Zoltan Herczeg (hzmester@freemail.hu). All rights reserved.
5     *
6     * Redistribution and use in source and binary forms, with or without modification, are
7     * permitted provided that the following conditions are met:
8     *
9     * 1. Redistributions of source code must retain the above copyright notice, this list of
10     * conditions and the following disclaimer.
11     *
12     * 2. Redistributions in binary form must reproduce the above copyright notice, this list
13     * of conditions and the following disclaimer in the documentation and/or other materials
14     * provided with the distribution.
15     *
16     * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) AND CONTRIBUTORS ``AS IS'' AND ANY
17     * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18     * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
19     * SHALL THE COPYRIGHT HOLDER(S) OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20     * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
21     * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
22     * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
23     * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
24     * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25     */
26    
27     /* mips 32-bit arch dependent functions. */
28    
29     static int load_immediate(struct sljit_compiler *compiler, int dst_ar, sljit_w imm)
30     {
31     if (!(imm & ~0xffff))
32     return push_inst(compiler, ORI | SA(0) | TA(dst_ar) | IMM(imm), dst_ar);
33    
34     if (imm < 0 && imm >= SIMM_MIN)
35     return push_inst(compiler, ADDIU | SA(0) | TA(dst_ar) | IMM(imm), dst_ar);
36    
37     FAIL_IF(push_inst(compiler, LUI | TA(dst_ar) | IMM(imm >> 16), dst_ar));
38     return (imm & 0xffff) ? push_inst(compiler, ORI | SA(dst_ar) | TA(dst_ar) | IMM(imm), dst_ar) : SLJIT_SUCCESS;
39     }
40    
41     #define EMIT_LOGICAL(op_imm, op_norm) \
42     if (flags & SRC2_IMM) { \
43     if (op & SLJIT_SET_E) \
44     FAIL_IF(push_inst(compiler, op_imm | S(src1) | TA(EQUAL_FLAG) | IMM(src2), EQUAL_FLAG)); \
45     if (CHECK_FLAGS(SLJIT_SET_E)) \
46     FAIL_IF(push_inst(compiler, op_imm | S(src1) | T(dst) | IMM(src2), DR(dst))); \
47     } \
48     else { \
49     if (op & SLJIT_SET_E) \
50     FAIL_IF(push_inst(compiler, op_norm | S(src1) | T(src2) | DA(EQUAL_FLAG), EQUAL_FLAG)); \
51     if (CHECK_FLAGS(SLJIT_SET_E)) \
52     FAIL_IF(push_inst(compiler, op_norm | S(src1) | T(src2) | D(dst), DR(dst))); \
53     }
54    
55     #define EMIT_SHIFT(op_imm, op_norm) \
56     if (flags & SRC2_IMM) { \
57     if (op & SLJIT_SET_E) \
58     FAIL_IF(push_inst(compiler, op_imm | T(src1) | DA(EQUAL_FLAG) | SH_IMM(src2), EQUAL_FLAG)); \
59     if (CHECK_FLAGS(SLJIT_SET_E)) \
60     FAIL_IF(push_inst(compiler, op_imm | T(src1) | D(dst) | SH_IMM(src2), DR(dst))); \
61     } \
62     else { \
63     if (op & SLJIT_SET_E) \
64     FAIL_IF(push_inst(compiler, op_norm | S(src2) | T(src1) | DA(EQUAL_FLAG), EQUAL_FLAG)); \
65     if (CHECK_FLAGS(SLJIT_SET_E)) \
66     FAIL_IF(push_inst(compiler, op_norm | S(src2) | T(src1) | D(dst), DR(dst))); \
67     }
68    
69     static SLJIT_INLINE int emit_single_op(struct sljit_compiler *compiler, int op, int flags,
70     int dst, int src1, sljit_w src2)
71     {
72     int overflow_ra = 0;
73    
74     switch (GET_OPCODE(op)) {
75     case SLJIT_ADD:
76     if (flags & SRC2_IMM) {
77     if (op & SLJIT_SET_O) {
78     FAIL_IF(push_inst(compiler, SRL | T(src1) | DA(TMP_EREG1) | SH_IMM(31), TMP_EREG1));
79     if (src2 < 0)
80     FAIL_IF(push_inst(compiler, XORI | SA(TMP_EREG1) | TA(TMP_EREG1) | IMM(1), TMP_EREG1));
81     }
82     if (op & SLJIT_SET_E)
83     FAIL_IF(push_inst(compiler, ADDIU | S(src1) | TA(EQUAL_FLAG) | IMM(src2), EQUAL_FLAG));
84     if (op & SLJIT_SET_C) {
85     if (src2 >= 0)
86     FAIL_IF(push_inst(compiler, ORI | S(src1) | TA(ULESS_FLAG) | IMM(src2), ULESS_FLAG));
87     else {
88     FAIL_IF(push_inst(compiler, ADDIU | SA(0) | TA(ULESS_FLAG) | IMM(src2), ULESS_FLAG));
89     FAIL_IF(push_inst(compiler, OR | S(src1) | TA(ULESS_FLAG) | DA(ULESS_FLAG), ULESS_FLAG));
90     }
91     }
92     /* dst may be the same as src1 or src2. */
93     if (CHECK_FLAGS(SLJIT_SET_E))
94     FAIL_IF(push_inst(compiler, ADDIU | S(src1) | T(dst) | IMM(src2), DR(dst)));
95     if (op & SLJIT_SET_O) {
96     FAIL_IF(push_inst(compiler, SRL | T(dst) | DA(OVERFLOW_FLAG) | SH_IMM(31), OVERFLOW_FLAG));
97     if (src2 < 0)
98     FAIL_IF(push_inst(compiler, XORI | SA(OVERFLOW_FLAG) | TA(OVERFLOW_FLAG) | IMM(1), OVERFLOW_FLAG));
99     }
100     }
101     else {
102     if (op & SLJIT_SET_O) {
103     FAIL_IF(push_inst(compiler, XOR | S(src1) | T(src2) | DA(TMP_EREG1), TMP_EREG1));
104     FAIL_IF(push_inst(compiler, SRL | TA(TMP_EREG1) | DA(TMP_EREG1) | SH_IMM(31), TMP_EREG1));
105     if (src1 != dst)
106     overflow_ra = DR(src1);
107     else if (src2 != dst)
108     overflow_ra = DR(src2);
109     else {
110     /* Rare ocasion. */
111     FAIL_IF(push_inst(compiler, ADDU | S(src1) | TA(0) | DA(TMP_EREG2), TMP_EREG2));
112     overflow_ra = TMP_EREG2;
113     }
114     }
115     if (op & SLJIT_SET_E)
116     FAIL_IF(push_inst(compiler, ADDU | S(src1) | T(src2) | DA(EQUAL_FLAG), EQUAL_FLAG));
117     if (op & SLJIT_SET_C)
118     FAIL_IF(push_inst(compiler, OR | S(src1) | T(src2) | DA(ULESS_FLAG), ULESS_FLAG));
119     /* dst may be the same as src1 or src2. */
120     if (CHECK_FLAGS(SLJIT_SET_E))
121     FAIL_IF(push_inst(compiler, ADDU | S(src1) | T(src2) | D(dst), DR(dst)));
122     if (op & SLJIT_SET_O) {
123     FAIL_IF(push_inst(compiler, XOR | S(dst) | TA(overflow_ra) | DA(OVERFLOW_FLAG), OVERFLOW_FLAG));
124     FAIL_IF(push_inst(compiler, SRL | TA(OVERFLOW_FLAG) | DA(OVERFLOW_FLAG) | SH_IMM(31), OVERFLOW_FLAG));
125     }
126     }
127    
128     /* a + b >= a | b (otherwise, the carry should be set to 1). */
129     if (op & SLJIT_SET_C)
130     FAIL_IF(push_inst(compiler, SLTU | S(dst) | TA(ULESS_FLAG) | DA(ULESS_FLAG), ULESS_FLAG));
131     if (op & SLJIT_SET_O)
132     return push_inst(compiler, MOVN | SA(0) | TA(TMP_EREG1) | DA(OVERFLOW_FLAG), OVERFLOW_FLAG);
133     return SLJIT_SUCCESS;
134    
135     case SLJIT_ADDC:
136     if (flags & SRC2_IMM) {
137     if (op & SLJIT_SET_C) {
138     if (src2 >= 0)
139     FAIL_IF(push_inst(compiler, ORI | S(src1) | TA(TMP_EREG1) | IMM(src2), TMP_EREG1));
140     else {
141     FAIL_IF(push_inst(compiler, ADDIU | SA(0) | TA(TMP_EREG1) | IMM(src2), TMP_EREG1));
142     FAIL_IF(push_inst(compiler, OR | S(src1) | TA(TMP_EREG1) | DA(TMP_EREG1), TMP_EREG1));
143     }
144     }
145     FAIL_IF(push_inst(compiler, ADDIU | S(src1) | T(dst) | IMM(src2), DR(dst)));
146     } else {
147     if (op & SLJIT_SET_C)
148     FAIL_IF(push_inst(compiler, OR | S(src1) | T(src2) | DA(TMP_EREG1), TMP_EREG1));
149     /* dst may be the same as src1 or src2. */
150     FAIL_IF(push_inst(compiler, ADDU | S(src1) | T(src2) | D(dst), DR(dst)));
151     }
152     if (op & SLJIT_SET_C)
153     FAIL_IF(push_inst(compiler, SLTU | S(dst) | TA(TMP_EREG1) | DA(TMP_EREG1), TMP_EREG1));
154    
155     FAIL_IF(push_inst(compiler, ADDU | S(dst) | TA(ULESS_FLAG) | D(dst), DR(dst)));
156     if (!(op & SLJIT_SET_C))
157     return SLJIT_SUCCESS;
158    
159     /* Set TMP_EREG2 (dst == 0) && (ULESS_FLAG == 1). */
160     FAIL_IF(push_inst(compiler, SLTIU | S(dst) | TA(TMP_EREG2) | IMM(1), TMP_EREG2));
161     FAIL_IF(push_inst(compiler, AND | SA(TMP_EREG2) | TA(ULESS_FLAG) | DA(TMP_EREG2), TMP_EREG2));
162     /* Set carry flag. */
163     return push_inst(compiler, OR | SA(TMP_EREG2) | TA(TMP_EREG1) | DA(ULESS_FLAG), ULESS_FLAG);
164    
165     case SLJIT_SUB:
166     if ((flags & SRC2_IMM) && ((op & (SLJIT_SET_S | SLJIT_SET_U)) || src2 == SIMM_MIN)) {
167     FAIL_IF(push_inst(compiler, ADDIU | SA(0) | T(TMP_REG2) | IMM(src2), DR(TMP_REG2)));
168     src2 = TMP_REG2;
169     flags &= ~SRC2_IMM;
170     }
171    
172     if (flags & SRC2_IMM) {
173     if (op & SLJIT_SET_O) {
174     FAIL_IF(push_inst(compiler, SRL | T(src1) | DA(TMP_EREG1) | SH_IMM(31), TMP_EREG1));
175     if (src2 < 0)
176     FAIL_IF(push_inst(compiler, XORI | SA(TMP_EREG1) | TA(TMP_EREG1) | IMM(1), TMP_EREG1));
177     if (src1 != dst)
178     overflow_ra = DR(src1);
179     else {
180     /* Rare ocasion. */
181     FAIL_IF(push_inst(compiler, ADDU | S(src1) | TA(0) | DA(TMP_EREG2), TMP_EREG2));
182     overflow_ra = TMP_EREG2;
183     }
184     }
185     if (op & SLJIT_SET_E)
186     FAIL_IF(push_inst(compiler, ADDIU | S(src1) | TA(EQUAL_FLAG) | IMM(-src2), EQUAL_FLAG));
187     if (op & SLJIT_SET_C)
188     FAIL_IF(push_inst(compiler, SLTIU | S(src1) | TA(ULESS_FLAG) | IMM(src2), ULESS_FLAG));
189     /* dst may be the same as src1 or src2. */
190     if (CHECK_FLAGS(SLJIT_SET_E))
191     FAIL_IF(push_inst(compiler, ADDIU | S(src1) | T(dst) | IMM(-src2), DR(dst)));
192     }
193     else {
194     if (op & SLJIT_SET_O) {
195     FAIL_IF(push_inst(compiler, XOR | S(src1) | T(src2) | DA(TMP_EREG1), TMP_EREG1));
196     FAIL_IF(push_inst(compiler, SRL | TA(TMP_EREG1) | DA(TMP_EREG1) | SH_IMM(31), TMP_EREG1));
197     if (src1 != dst)
198     overflow_ra = DR(src1);
199     else {
200     /* Rare ocasion. */
201     FAIL_IF(push_inst(compiler, ADDU | S(src1) | TA(0) | DA(TMP_EREG2), TMP_EREG2));
202     overflow_ra = TMP_EREG2;
203     }
204     }
205     if (op & SLJIT_SET_E)
206     FAIL_IF(push_inst(compiler, SUBU | S(src1) | T(src2) | DA(EQUAL_FLAG), EQUAL_FLAG));
207     if (op & (SLJIT_SET_U | SLJIT_SET_C))
208     FAIL_IF(push_inst(compiler, SLTU | S(src1) | T(src2) | DA(ULESS_FLAG), ULESS_FLAG));
209     if (op & SLJIT_SET_U)
210     FAIL_IF(push_inst(compiler, SLTU | S(src2) | T(src1) | DA(UGREATER_FLAG), UGREATER_FLAG));
211     if (op & SLJIT_SET_S) {
212     FAIL_IF(push_inst(compiler, SLT | S(src1) | T(src2) | DA(LESS_FLAG), LESS_FLAG));
213     FAIL_IF(push_inst(compiler, SLT | S(src2) | T(src1) | DA(GREATER_FLAG), GREATER_FLAG));
214     }
215     /* dst may be the same as src1 or src2. */
216     if (CHECK_FLAGS(SLJIT_SET_E | SLJIT_SET_S | SLJIT_SET_U | SLJIT_SET_C))
217     FAIL_IF(push_inst(compiler, SUBU | S(src1) | T(src2) | D(dst), DR(dst)));
218     }
219    
220     if (op & SLJIT_SET_O) {
221     FAIL_IF(push_inst(compiler, XOR | S(dst) | TA(overflow_ra) | DA(OVERFLOW_FLAG), OVERFLOW_FLAG));
222     FAIL_IF(push_inst(compiler, SRL | TA(OVERFLOW_FLAG) | DA(OVERFLOW_FLAG) | SH_IMM(31), OVERFLOW_FLAG));
223     return push_inst(compiler, MOVZ | SA(0) | TA(TMP_EREG1) | DA(OVERFLOW_FLAG), OVERFLOW_FLAG);
224     }
225     return SLJIT_SUCCESS;
226    
227     case SLJIT_SUBC:
228     if ((flags & SRC2_IMM) && src2 == SIMM_MIN) {
229     FAIL_IF(push_inst(compiler, ADDIU | SA(0) | T(TMP_REG2) | IMM(src2), DR(TMP_REG2)));
230     src2 = TMP_REG2;
231     flags &= ~SRC2_IMM;
232     }
233    
234     if (flags & SRC2_IMM) {
235     if (op & SLJIT_SET_C)
236     FAIL_IF(push_inst(compiler, SLTIU | S(src1) | TA(TMP_EREG1) | IMM(-src2), TMP_EREG1));
237     /* dst may be the same as src1 or src2. */
238     FAIL_IF(push_inst(compiler, ADDIU | S(src1) | T(dst) | IMM(-src2), DR(dst)));
239     }
240     else {
241     if (op & SLJIT_SET_C)
242     FAIL_IF(push_inst(compiler, SLTU | S(src1) | T(src2) | DA(TMP_EREG1), TMP_EREG1));
243     /* dst may be the same as src1 or src2. */
244     FAIL_IF(push_inst(compiler, SUBU | S(src1) | T(src2) | D(dst), DR(dst)));
245     }
246    
247     if (op & SLJIT_SET_C)
248     FAIL_IF(push_inst(compiler, MOVZ | SA(ULESS_FLAG) | T(dst) | DA(TMP_EREG1), TMP_EREG1));
249    
250     FAIL_IF(push_inst(compiler, SUBU | S(dst) | TA(ULESS_FLAG) | D(dst), DR(dst)));
251    
252     if (op & SLJIT_SET_C)
253     FAIL_IF(push_inst(compiler, ADDU | SA(TMP_EREG1) | TA(0) | DA(ULESS_FLAG), ULESS_FLAG));
254    
255     return SLJIT_SUCCESS;
256    
257     case SLJIT_MUL:
258     SLJIT_ASSERT(!(flags & SRC2_IMM));
259 zherczeg 714 if (!(op & SLJIT_SET_O)) {
260     #if (defined SLJIT_MIPS_32_64 && SLJIT_MIPS_32_64)
261 ph10 662 return push_inst(compiler, MUL | S(src1) | T(src2) | D(dst), DR(dst));
262 zherczeg 714 #else
263     FAIL_IF(push_inst(compiler, MULT | S(src1) | T(src2), MOVABLE_INS));
264     return push_inst(compiler, MFLO | D(dst), DR(dst));
265     #endif
266     }
267 ph10 662 FAIL_IF(push_inst(compiler, MULT | S(src1) | T(src2), MOVABLE_INS));
268     FAIL_IF(push_inst(compiler, MFHI | DA(TMP_EREG1), TMP_EREG1));
269     FAIL_IF(push_inst(compiler, MFLO | D(dst), DR(dst)));
270     FAIL_IF(push_inst(compiler, SRA | T(dst) | DA(TMP_EREG2) | SH_IMM(31), TMP_EREG2));
271     return push_inst(compiler, SUBU | SA(TMP_EREG1) | TA(TMP_EREG2) | DA(OVERFLOW_FLAG), OVERFLOW_FLAG);
272    
273     case SLJIT_AND:
274     EMIT_LOGICAL(ANDI, AND);
275     return SLJIT_SUCCESS;
276    
277     case SLJIT_OR:
278     EMIT_LOGICAL(ORI, OR);
279     return SLJIT_SUCCESS;
280    
281     case SLJIT_XOR:
282     EMIT_LOGICAL(XORI, XOR);
283     return SLJIT_SUCCESS;
284    
285     case SLJIT_SHL:
286     EMIT_SHIFT(SLL, SLLV);
287     return SLJIT_SUCCESS;
288    
289     case SLJIT_LSHR:
290     EMIT_SHIFT(SRL, SRLV);
291     return SLJIT_SUCCESS;
292    
293     case SLJIT_ASHR:
294     EMIT_SHIFT(SRA, SRAV);
295     return SLJIT_SUCCESS;
296    
297     case SLJIT_MOV:
298     case SLJIT_MOV_UI:
299     case SLJIT_MOV_SI:
300     SLJIT_ASSERT(src1 == TMP_REG1);
301     if (dst != src2)
302     return push_inst(compiler, ADDU | S(src2) | TA(0) | D(dst), DR(dst));
303     return SLJIT_SUCCESS;
304    
305     case SLJIT_MOV_UB:
306     case SLJIT_MOV_SB:
307     SLJIT_ASSERT(src1 == TMP_REG1);
308     if ((flags & (REG_DEST | REG2_SOURCE)) == (REG_DEST | REG2_SOURCE)) {
309 zherczeg 714 if (op == SLJIT_MOV_SB) {
310     #if (defined SLJIT_MIPS_32_64 && SLJIT_MIPS_32_64)
311 ph10 662 return push_inst(compiler, SEB | T(src2) | D(dst), DR(dst));
312 zherczeg 714 #else
313     FAIL_IF(push_inst(compiler, SLL | T(src2) | D(dst) | SH_IMM(24), DR(dst)));
314     return push_inst(compiler, SRA | T(dst) | D(dst) | SH_IMM(24), DR(dst));
315     #endif
316     }
317 ph10 662 return push_inst(compiler, ANDI | S(src2) | T(dst) | IMM(0xff), DR(dst));
318     }
319     else if (dst != src2)
320     SLJIT_ASSERT_STOP();
321     return SLJIT_SUCCESS;
322    
323     case SLJIT_MOV_UH:
324     case SLJIT_MOV_SH:
325     SLJIT_ASSERT(src1 == TMP_REG1);
326     if ((flags & (REG_DEST | REG2_SOURCE)) == (REG_DEST | REG2_SOURCE)) {
327 zherczeg 714 if (op == SLJIT_MOV_SH) {
328     #if (defined SLJIT_MIPS_32_64 && SLJIT_MIPS_32_64)
329 ph10 662 return push_inst(compiler, SEH | T(src2) | D(dst), DR(dst));
330 zherczeg 714 #else
331     FAIL_IF(push_inst(compiler, SLL | T(src2) | D(dst) | SH_IMM(16), DR(dst)));
332     return push_inst(compiler, SRA | T(dst) | D(dst) | SH_IMM(16), DR(dst));
333     #endif
334     }
335 ph10 662 return push_inst(compiler, ANDI | S(src2) | T(dst) | IMM(0xffff), DR(dst));
336     }
337     else if (dst != src2)
338     SLJIT_ASSERT_STOP();
339     return SLJIT_SUCCESS;
340    
341     case SLJIT_NOT:
342     SLJIT_ASSERT(src1 == TMP_REG1 && !(flags & SRC2_IMM));
343     if (op & SLJIT_SET_E)
344     FAIL_IF(push_inst(compiler, NOR | S(src2) | T(src2) | DA(EQUAL_FLAG), EQUAL_FLAG));
345     if (CHECK_FLAGS(SLJIT_SET_E))
346     FAIL_IF(push_inst(compiler, NOR | S(src2) | T(src2) | D(dst), DR(dst)));
347     return SLJIT_SUCCESS;
348    
349     case SLJIT_CLZ:
350     SLJIT_ASSERT(src1 == TMP_REG1 && !(flags & SRC2_IMM));
351 zherczeg 714 #if (defined SLJIT_MIPS_32_64 && SLJIT_MIPS_32_64)
352 ph10 662 if (op & SLJIT_SET_E)
353     FAIL_IF(push_inst(compiler, CLZ | S(src2) | TA(EQUAL_FLAG) | DA(EQUAL_FLAG), EQUAL_FLAG));
354     if (CHECK_FLAGS(SLJIT_SET_E))
355     FAIL_IF(push_inst(compiler, CLZ | S(src2) | T(dst) | D(dst), DR(dst)));
356 zherczeg 714 #else
357     if (SLJIT_UNLIKELY(flags & UNUSED_DEST)) {
358     FAIL_IF(push_inst(compiler, SRL | T(src2) | DA(EQUAL_FLAG) | SH_IMM(31), EQUAL_FLAG));
359     return push_inst(compiler, XORI | SA(EQUAL_FLAG) | TA(EQUAL_FLAG) | IMM(1), EQUAL_FLAG);
360     }
361     /* Nearly all instructions are unmovable in the following sequence. */
362     FAIL_IF(push_inst(compiler, ADDU_W | S(src2) | TA(0) | D(TMP_REG1), DR(TMP_REG1)));
363     /* Check zero. */
364     FAIL_IF(push_inst(compiler, BEQ | S(TMP_REG1) | TA(0) | IMM(6), UNMOVABLE_INS));
365     FAIL_IF(push_inst(compiler, ORI | SA(0) | T(dst) | IMM(32), UNMOVABLE_INS));
366     /* Check sign bit. */
367     FAIL_IF(push_inst(compiler, BLTZ | S(TMP_REG1) | IMM(4), UNMOVABLE_INS));
368     FAIL_IF(push_inst(compiler, ORI | SA(0) | T(dst) | IMM(0), UNMOVABLE_INS));
369     /* Loop for searching the highest bit. */
370     FAIL_IF(push_inst(compiler, SLL | T(TMP_REG1) | D(TMP_REG1) | SH_IMM(1), DR(TMP_REG1)));
371     FAIL_IF(push_inst(compiler, BGEZ | S(TMP_REG1) | IMM(-2), UNMOVABLE_INS));
372     FAIL_IF(push_inst(compiler, ADDIU_W | S(dst) | T(dst) | IMM(1), UNMOVABLE_INS));
373     if (op & SLJIT_SET_E)
374     return push_inst(compiler, ADDU_W | S(dst) | TA(0) | DA(EQUAL_FLAG), EQUAL_FLAG);
375     #endif
376 ph10 662 return SLJIT_SUCCESS;
377     }
378    
379     SLJIT_ASSERT_STOP();
380     return SLJIT_SUCCESS;
381     }
382    
383     static SLJIT_INLINE int emit_const(struct sljit_compiler *compiler, int reg, sljit_w init_value)
384     {
385     FAIL_IF(push_inst(compiler, LUI | T(reg) | IMM(init_value >> 16), DR(reg)));
386     return push_inst(compiler, ORI | S(reg) | T(reg) | IMM(init_value), DR(reg));
387     }
388    
389 zherczeg 740 SLJIT_API_FUNC_ATTRIBUTE void sljit_set_jump_addr(sljit_uw addr, sljit_uw new_addr)
390 ph10 662 {
391     sljit_ins *inst = (sljit_ins*)addr;
392    
393     inst[0] = (inst[0] & 0xffff0000) | ((new_addr >> 16) & 0xffff);
394     inst[1] = (inst[1] & 0xffff0000) | (new_addr & 0xffff);
395     SLJIT_CACHE_FLUSH(inst, inst + 2);
396     }
397    
398 zherczeg 740 SLJIT_API_FUNC_ATTRIBUTE void sljit_set_const(sljit_uw addr, sljit_w new_constant)
399 ph10 662 {
400     sljit_ins *inst = (sljit_ins*)addr;
401    
402     inst[0] = (inst[0] & 0xffff0000) | ((new_constant >> 16) & 0xffff);
403     inst[1] = (inst[1] & 0xffff0000) | (new_constant & 0xffff);
404     SLJIT_CACHE_FLUSH(inst, inst + 2);
405     }

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