1 /*
2 * Stack-less Just-In-Time compiler
3 *
4 * Copyright 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
load_immediate(struct sljit_compiler * compiler,sljit_s32 dst_ar,sljit_sw imm)29 static sljit_s32 load_immediate(struct sljit_compiler *compiler, sljit_s32 dst_ar, sljit_sw 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_Z) \
44 FAIL_IF(push_inst(compiler, op_imm | S(src1) | TA(EQUAL_FLAG) | IMM(src2), EQUAL_FLAG)); \
45 if (!(flags & UNUSED_DEST)) \
46 FAIL_IF(push_inst(compiler, op_imm | S(src1) | T(dst) | IMM(src2), DR(dst))); \
47 } \
48 else { \
49 if (op & SLJIT_SET_Z) \
50 FAIL_IF(push_inst(compiler, op_norm | S(src1) | T(src2) | DA(EQUAL_FLAG), EQUAL_FLAG)); \
51 if (!(flags & UNUSED_DEST)) \
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_v) \
56 if (flags & SRC2_IMM) { \
57 if (op & SLJIT_SET_Z) \
58 FAIL_IF(push_inst(compiler, op_imm | T(src1) | DA(EQUAL_FLAG) | SH_IMM(src2), EQUAL_FLAG)); \
59 if (!(flags & UNUSED_DEST)) \
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_Z) \
64 FAIL_IF(push_inst(compiler, op_v | S(src2) | T(src1) | DA(EQUAL_FLAG), EQUAL_FLAG)); \
65 if (!(flags & UNUSED_DEST)) \
66 FAIL_IF(push_inst(compiler, op_v | S(src2) | T(src1) | D(dst), DR(dst))); \
67 }
68
emit_single_op(struct sljit_compiler * compiler,sljit_s32 op,sljit_s32 flags,sljit_s32 dst,sljit_s32 src1,sljit_sw src2)69 static SLJIT_INLINE sljit_s32 emit_single_op(struct sljit_compiler *compiler, sljit_s32 op, sljit_s32 flags,
70 sljit_s32 dst, sljit_s32 src1, sljit_sw src2)
71 {
72 sljit_s32 is_overflow, is_carry, is_handled;
73
74 switch (GET_OPCODE(op)) {
75 case SLJIT_MOV:
76 case SLJIT_MOV_U32:
77 case SLJIT_MOV_S32:
78 case SLJIT_MOV_P:
79 SLJIT_ASSERT(src1 == TMP_REG1 && !(flags & SRC2_IMM));
80 if (dst != src2)
81 return push_inst(compiler, ADDU | S(src2) | TA(0) | D(dst), DR(dst));
82 return SLJIT_SUCCESS;
83
84 case SLJIT_MOV_U8:
85 case SLJIT_MOV_S8:
86 SLJIT_ASSERT(src1 == TMP_REG1 && !(flags & SRC2_IMM));
87 if ((flags & (REG_DEST | REG2_SOURCE)) == (REG_DEST | REG2_SOURCE)) {
88 if (op == SLJIT_MOV_S8) {
89 #if (defined SLJIT_MIPS_R1 && SLJIT_MIPS_R1)
90 return push_inst(compiler, SEB | T(src2) | D(dst), DR(dst));
91 #else
92 FAIL_IF(push_inst(compiler, SLL | T(src2) | D(dst) | SH_IMM(24), DR(dst)));
93 return push_inst(compiler, SRA | T(dst) | D(dst) | SH_IMM(24), DR(dst));
94 #endif
95 }
96 return push_inst(compiler, ANDI | S(src2) | T(dst) | IMM(0xff), DR(dst));
97 }
98 else {
99 SLJIT_ASSERT(dst == src2);
100 }
101 return SLJIT_SUCCESS;
102
103 case SLJIT_MOV_U16:
104 case SLJIT_MOV_S16:
105 SLJIT_ASSERT(src1 == TMP_REG1 && !(flags & SRC2_IMM));
106 if ((flags & (REG_DEST | REG2_SOURCE)) == (REG_DEST | REG2_SOURCE)) {
107 if (op == SLJIT_MOV_S16) {
108 #if (defined SLJIT_MIPS_R1 && SLJIT_MIPS_R1)
109 return push_inst(compiler, SEH | T(src2) | D(dst), DR(dst));
110 #else
111 FAIL_IF(push_inst(compiler, SLL | T(src2) | D(dst) | SH_IMM(16), DR(dst)));
112 return push_inst(compiler, SRA | T(dst) | D(dst) | SH_IMM(16), DR(dst));
113 #endif
114 }
115 return push_inst(compiler, ANDI | S(src2) | T(dst) | IMM(0xffff), DR(dst));
116 }
117 else {
118 SLJIT_ASSERT(dst == src2);
119 }
120 return SLJIT_SUCCESS;
121
122 case SLJIT_NOT:
123 SLJIT_ASSERT(src1 == TMP_REG1 && !(flags & SRC2_IMM));
124 if (op & SLJIT_SET_Z)
125 FAIL_IF(push_inst(compiler, NOR | S(src2) | T(src2) | DA(EQUAL_FLAG), EQUAL_FLAG));
126 if (!(flags & UNUSED_DEST))
127 FAIL_IF(push_inst(compiler, NOR | S(src2) | T(src2) | D(dst), DR(dst)));
128 return SLJIT_SUCCESS;
129
130 case SLJIT_CLZ:
131 SLJIT_ASSERT(src1 == TMP_REG1 && !(flags & SRC2_IMM));
132 #if (defined SLJIT_MIPS_R1 && SLJIT_MIPS_R1)
133 if (op & SLJIT_SET_Z)
134 FAIL_IF(push_inst(compiler, CLZ | S(src2) | TA(EQUAL_FLAG) | DA(EQUAL_FLAG), EQUAL_FLAG));
135 if (!(flags & UNUSED_DEST))
136 FAIL_IF(push_inst(compiler, CLZ | S(src2) | T(dst) | D(dst), DR(dst)));
137 #else
138 if (SLJIT_UNLIKELY(flags & UNUSED_DEST)) {
139 FAIL_IF(push_inst(compiler, SRL | T(src2) | DA(EQUAL_FLAG) | SH_IMM(31), EQUAL_FLAG));
140 return push_inst(compiler, XORI | SA(EQUAL_FLAG) | TA(EQUAL_FLAG) | IMM(1), EQUAL_FLAG);
141 }
142 /* Nearly all instructions are unmovable in the following sequence. */
143 FAIL_IF(push_inst(compiler, ADDU | S(src2) | TA(0) | D(TMP_REG1), DR(TMP_REG1)));
144 /* Check zero. */
145 FAIL_IF(push_inst(compiler, BEQ | S(TMP_REG1) | TA(0) | IMM(5), UNMOVABLE_INS));
146 FAIL_IF(push_inst(compiler, ORI | SA(0) | T(dst) | IMM(32), UNMOVABLE_INS));
147 FAIL_IF(push_inst(compiler, ADDIU | SA(0) | T(dst) | IMM(-1), DR(dst)));
148 /* Loop for searching the highest bit. */
149 FAIL_IF(push_inst(compiler, ADDIU | S(dst) | T(dst) | IMM(1), DR(dst)));
150 FAIL_IF(push_inst(compiler, BGEZ | S(TMP_REG1) | IMM(-2), UNMOVABLE_INS));
151 FAIL_IF(push_inst(compiler, SLL | T(TMP_REG1) | D(TMP_REG1) | SH_IMM(1), UNMOVABLE_INS));
152 #endif
153 return SLJIT_SUCCESS;
154
155 case SLJIT_ADD:
156 is_overflow = GET_FLAG_TYPE(op) == SLJIT_OVERFLOW;
157 is_carry = GET_FLAG_TYPE(op) == GET_FLAG_TYPE(SLJIT_SET_CARRY);
158
159 if (flags & SRC2_IMM) {
160 if (is_overflow) {
161 if (src2 >= 0)
162 FAIL_IF(push_inst(compiler, OR | S(src1) | T(src1) | DA(EQUAL_FLAG), EQUAL_FLAG));
163 else
164 FAIL_IF(push_inst(compiler, NOR | S(src1) | T(src1) | DA(EQUAL_FLAG), EQUAL_FLAG));
165 }
166 else if (op & SLJIT_SET_Z)
167 FAIL_IF(push_inst(compiler, ADDIU | S(src1) | TA(EQUAL_FLAG) | IMM(src2), EQUAL_FLAG));
168
169 if (is_overflow || is_carry) {
170 if (src2 >= 0)
171 FAIL_IF(push_inst(compiler, ORI | S(src1) | TA(OTHER_FLAG) | IMM(src2), OTHER_FLAG));
172 else {
173 FAIL_IF(push_inst(compiler, ADDIU | SA(0) | TA(OTHER_FLAG) | IMM(src2), OTHER_FLAG));
174 FAIL_IF(push_inst(compiler, OR | S(src1) | TA(OTHER_FLAG) | DA(OTHER_FLAG), OTHER_FLAG));
175 }
176 }
177 /* dst may be the same as src1 or src2. */
178 if (!(flags & UNUSED_DEST) || (op & VARIABLE_FLAG_MASK))
179 FAIL_IF(push_inst(compiler, ADDIU | S(src1) | T(dst) | IMM(src2), DR(dst)));
180 }
181 else {
182 if (is_overflow)
183 FAIL_IF(push_inst(compiler, XOR | S(src1) | T(src2) | DA(EQUAL_FLAG), EQUAL_FLAG));
184 else if (op & SLJIT_SET_Z)
185 FAIL_IF(push_inst(compiler, ADDU | S(src1) | T(src2) | DA(EQUAL_FLAG), EQUAL_FLAG));
186
187 if (is_overflow || is_carry)
188 FAIL_IF(push_inst(compiler, OR | S(src1) | T(src2) | DA(OTHER_FLAG), OTHER_FLAG));
189 /* dst may be the same as src1 or src2. */
190 if (!(flags & UNUSED_DEST) || (op & VARIABLE_FLAG_MASK))
191 FAIL_IF(push_inst(compiler, ADDU | S(src1) | T(src2) | D(dst), DR(dst)));
192 }
193
194 /* a + b >= a | b (otherwise, the carry should be set to 1). */
195 if (is_overflow || is_carry)
196 FAIL_IF(push_inst(compiler, SLTU | S(dst) | TA(OTHER_FLAG) | DA(OTHER_FLAG), OTHER_FLAG));
197 if (!is_overflow)
198 return SLJIT_SUCCESS;
199 FAIL_IF(push_inst(compiler, SLL | TA(OTHER_FLAG) | D(TMP_REG1) | SH_IMM(31), DR(TMP_REG1)));
200 FAIL_IF(push_inst(compiler, XOR | S(TMP_REG1) | TA(EQUAL_FLAG) | DA(EQUAL_FLAG), EQUAL_FLAG));
201 FAIL_IF(push_inst(compiler, XOR | S(dst) | TA(EQUAL_FLAG) | DA(OTHER_FLAG), OTHER_FLAG));
202 if (op & SLJIT_SET_Z)
203 FAIL_IF(push_inst(compiler, ADDU | S(dst) | TA(0) | DA(EQUAL_FLAG), EQUAL_FLAG));
204 return push_inst(compiler, SRL | TA(OTHER_FLAG) | DA(OTHER_FLAG) | SH_IMM(31), OTHER_FLAG);
205
206 case SLJIT_ADDC:
207 is_carry = GET_FLAG_TYPE(op) == GET_FLAG_TYPE(SLJIT_SET_CARRY);
208
209 if (flags & SRC2_IMM) {
210 if (is_carry) {
211 if (src2 >= 0)
212 FAIL_IF(push_inst(compiler, ORI | S(src1) | TA(EQUAL_FLAG) | IMM(src2), EQUAL_FLAG));
213 else {
214 FAIL_IF(push_inst(compiler, ADDIU | SA(0) | TA(EQUAL_FLAG) | IMM(src2), EQUAL_FLAG));
215 FAIL_IF(push_inst(compiler, OR | S(src1) | TA(EQUAL_FLAG) | DA(EQUAL_FLAG), EQUAL_FLAG));
216 }
217 }
218 FAIL_IF(push_inst(compiler, ADDIU | S(src1) | T(dst) | IMM(src2), DR(dst)));
219 } else {
220 if (is_carry)
221 FAIL_IF(push_inst(compiler, OR | S(src1) | T(src2) | DA(EQUAL_FLAG), EQUAL_FLAG));
222 /* dst may be the same as src1 or src2. */
223 FAIL_IF(push_inst(compiler, ADDU | S(src1) | T(src2) | D(dst), DR(dst)));
224 }
225 if (is_carry)
226 FAIL_IF(push_inst(compiler, SLTU | S(dst) | TA(EQUAL_FLAG) | DA(EQUAL_FLAG), EQUAL_FLAG));
227
228 FAIL_IF(push_inst(compiler, ADDU | S(dst) | TA(OTHER_FLAG) | D(dst), DR(dst)));
229 if (!is_carry)
230 return SLJIT_SUCCESS;
231
232 /* Set ULESS_FLAG (dst == 0) && (OTHER_FLAG == 1). */
233 FAIL_IF(push_inst(compiler, SLTU | S(dst) | TA(OTHER_FLAG) | DA(OTHER_FLAG), OTHER_FLAG));
234 /* Set carry flag. */
235 return push_inst(compiler, OR | SA(OTHER_FLAG) | TA(EQUAL_FLAG) | DA(OTHER_FLAG), OTHER_FLAG);
236
237 case SLJIT_SUB:
238 if ((flags & SRC2_IMM) && src2 == SIMM_MIN) {
239 FAIL_IF(push_inst(compiler, ADDIU | SA(0) | T(TMP_REG2) | IMM(src2), DR(TMP_REG2)));
240 src2 = TMP_REG2;
241 flags &= ~SRC2_IMM;
242 }
243
244 is_handled = 0;
245
246 if (flags & SRC2_IMM) {
247 if (GET_FLAG_TYPE(op) == SLJIT_LESS || GET_FLAG_TYPE(op) == SLJIT_GREATER_EQUAL) {
248 FAIL_IF(push_inst(compiler, SLTIU | S(src1) | TA(OTHER_FLAG) | IMM(src2), OTHER_FLAG));
249 is_handled = 1;
250 }
251 else if (GET_FLAG_TYPE(op) == SLJIT_SIG_LESS || GET_FLAG_TYPE(op) == SLJIT_SIG_GREATER_EQUAL) {
252 FAIL_IF(push_inst(compiler, SLTI | S(src1) | TA(OTHER_FLAG) | IMM(src2), OTHER_FLAG));
253 is_handled = 1;
254 }
255 }
256
257 if (!is_handled && GET_FLAG_TYPE(op) >= SLJIT_LESS && GET_FLAG_TYPE(op) <= SLJIT_SIG_LESS_EQUAL) {
258 is_handled = 1;
259
260 if (flags & SRC2_IMM) {
261 FAIL_IF(push_inst(compiler, ADDIU | SA(0) | T(TMP_REG2) | IMM(src2), DR(TMP_REG2)));
262 src2 = TMP_REG2;
263 flags &= ~SRC2_IMM;
264 }
265
266 if (GET_FLAG_TYPE(op) == SLJIT_LESS || GET_FLAG_TYPE(op) == SLJIT_GREATER_EQUAL) {
267 FAIL_IF(push_inst(compiler, SLTU | S(src1) | T(src2) | DA(OTHER_FLAG), OTHER_FLAG));
268 }
269 else if (GET_FLAG_TYPE(op) == SLJIT_GREATER || GET_FLAG_TYPE(op) == SLJIT_LESS_EQUAL)
270 {
271 FAIL_IF(push_inst(compiler, SLTU | S(src2) | T(src1) | DA(OTHER_FLAG), OTHER_FLAG));
272 }
273 else if (GET_FLAG_TYPE(op) == SLJIT_SIG_LESS || GET_FLAG_TYPE(op) == SLJIT_SIG_GREATER_EQUAL) {
274 FAIL_IF(push_inst(compiler, SLT | S(src1) | T(src2) | DA(OTHER_FLAG), OTHER_FLAG));
275 }
276 else if (GET_FLAG_TYPE(op) == SLJIT_SIG_GREATER || GET_FLAG_TYPE(op) == SLJIT_SIG_LESS_EQUAL)
277 {
278 FAIL_IF(push_inst(compiler, SLT | S(src2) | T(src1) | DA(OTHER_FLAG), OTHER_FLAG));
279 }
280 }
281
282 if (is_handled) {
283 if (flags & SRC2_IMM) {
284 if (op & SLJIT_SET_Z)
285 FAIL_IF(push_inst(compiler, ADDIU | S(src1) | TA(EQUAL_FLAG) | IMM(-src2), EQUAL_FLAG));
286 if (!(flags & UNUSED_DEST))
287 return push_inst(compiler, ADDIU | S(src1) | T(dst) | IMM(-src2), DR(dst));
288 }
289 else {
290 if (op & SLJIT_SET_Z)
291 FAIL_IF(push_inst(compiler, SUBU | S(src1) | T(src2) | DA(EQUAL_FLAG), EQUAL_FLAG));
292 if (!(flags & UNUSED_DEST))
293 return push_inst(compiler, SUBU | S(src1) | T(src2) | D(dst), DR(dst));
294 }
295 return SLJIT_SUCCESS;
296 }
297
298 is_overflow = GET_FLAG_TYPE(op) == SLJIT_OVERFLOW;
299 is_carry = GET_FLAG_TYPE(op) == GET_FLAG_TYPE(SLJIT_SET_CARRY);
300
301 if (flags & SRC2_IMM) {
302 if (is_overflow) {
303 if (src2 >= 0)
304 FAIL_IF(push_inst(compiler, OR | S(src1) | T(src1) | DA(EQUAL_FLAG), EQUAL_FLAG));
305 else
306 FAIL_IF(push_inst(compiler, NOR | S(src1) | T(src1) | DA(EQUAL_FLAG), EQUAL_FLAG));
307 }
308 else if (op & SLJIT_SET_Z)
309 FAIL_IF(push_inst(compiler, ADDIU | S(src1) | TA(EQUAL_FLAG) | IMM(-src2), EQUAL_FLAG));
310
311 if (is_overflow || is_carry)
312 FAIL_IF(push_inst(compiler, SLTIU | S(src1) | TA(OTHER_FLAG) | IMM(src2), OTHER_FLAG));
313 /* dst may be the same as src1 or src2. */
314 if (!(flags & UNUSED_DEST) || (op & VARIABLE_FLAG_MASK))
315 FAIL_IF(push_inst(compiler, ADDIU | S(src1) | T(dst) | IMM(-src2), DR(dst)));
316 }
317 else {
318 if (is_overflow)
319 FAIL_IF(push_inst(compiler, XOR | S(src1) | T(src2) | DA(EQUAL_FLAG), EQUAL_FLAG));
320 else if (op & SLJIT_SET_Z)
321 FAIL_IF(push_inst(compiler, SUBU | S(src1) | T(src2) | DA(EQUAL_FLAG), EQUAL_FLAG));
322
323 if (is_overflow || is_carry)
324 FAIL_IF(push_inst(compiler, SLTU | S(src1) | T(src2) | DA(OTHER_FLAG), OTHER_FLAG));
325 /* dst may be the same as src1 or src2. */
326 if (!(flags & UNUSED_DEST) || (op & VARIABLE_FLAG_MASK))
327 FAIL_IF(push_inst(compiler, SUBU | S(src1) | T(src2) | D(dst), DR(dst)));
328 }
329
330 if (!is_overflow)
331 return SLJIT_SUCCESS;
332 FAIL_IF(push_inst(compiler, SLL | TA(OTHER_FLAG) | D(TMP_REG1) | SH_IMM(31), DR(TMP_REG1)));
333 FAIL_IF(push_inst(compiler, XOR | S(TMP_REG1) | TA(EQUAL_FLAG) | DA(EQUAL_FLAG), EQUAL_FLAG));
334 FAIL_IF(push_inst(compiler, XOR | S(dst) | TA(EQUAL_FLAG) | DA(OTHER_FLAG), OTHER_FLAG));
335 if (op & SLJIT_SET_Z)
336 FAIL_IF(push_inst(compiler, ADDU | S(dst) | TA(0) | DA(EQUAL_FLAG), EQUAL_FLAG));
337 return push_inst(compiler, SRL | TA(OTHER_FLAG) | DA(OTHER_FLAG) | SH_IMM(31), OTHER_FLAG);
338
339 case SLJIT_SUBC:
340 if ((flags & SRC2_IMM) && src2 == SIMM_MIN) {
341 FAIL_IF(push_inst(compiler, ADDIU | SA(0) | T(TMP_REG2) | IMM(src2), DR(TMP_REG2)));
342 src2 = TMP_REG2;
343 flags &= ~SRC2_IMM;
344 }
345
346 is_carry = GET_FLAG_TYPE(op) == GET_FLAG_TYPE(SLJIT_SET_CARRY);
347
348 if (flags & SRC2_IMM) {
349 if (is_carry)
350 FAIL_IF(push_inst(compiler, SLTIU | S(src1) | TA(EQUAL_FLAG) | IMM(src2), EQUAL_FLAG));
351 /* dst may be the same as src1 or src2. */
352 FAIL_IF(push_inst(compiler, ADDIU | S(src1) | T(dst) | IMM(-src2), DR(dst)));
353 }
354 else {
355 if (is_carry)
356 FAIL_IF(push_inst(compiler, SLTU | S(src1) | T(src2) | DA(EQUAL_FLAG), EQUAL_FLAG));
357 /* dst may be the same as src1 or src2. */
358 FAIL_IF(push_inst(compiler, SUBU | S(src1) | T(src2) | D(dst), DR(dst)));
359 }
360
361 if (is_carry)
362 FAIL_IF(push_inst(compiler, SLTU | S(dst) | TA(OTHER_FLAG) | D(TMP_REG1), DR(TMP_REG1)));
363
364 FAIL_IF(push_inst(compiler, SUBU | S(dst) | TA(OTHER_FLAG) | D(dst), DR(dst)));
365 return (is_carry) ? push_inst(compiler, OR | SA(EQUAL_FLAG) | T(TMP_REG1) | DA(OTHER_FLAG), OTHER_FLAG) : SLJIT_SUCCESS;
366
367 case SLJIT_MUL:
368 SLJIT_ASSERT(!(flags & SRC2_IMM));
369
370 if (GET_FLAG_TYPE(op) != SLJIT_MUL_OVERFLOW) {
371 #if (defined SLJIT_MIPS_R1 && SLJIT_MIPS_R1)
372 return push_inst(compiler, MUL | S(src1) | T(src2) | D(dst), DR(dst));
373 #else
374 FAIL_IF(push_inst(compiler, MULT | S(src1) | T(src2), MOVABLE_INS));
375 return push_inst(compiler, MFLO | D(dst), DR(dst));
376 #endif
377 }
378 FAIL_IF(push_inst(compiler, MULT | S(src1) | T(src2), MOVABLE_INS));
379 FAIL_IF(push_inst(compiler, MFHI | DA(EQUAL_FLAG), EQUAL_FLAG));
380 FAIL_IF(push_inst(compiler, MFLO | D(dst), DR(dst)));
381 FAIL_IF(push_inst(compiler, SRA | T(dst) | DA(OTHER_FLAG) | SH_IMM(31), OTHER_FLAG));
382 return push_inst(compiler, SUBU | SA(EQUAL_FLAG) | TA(OTHER_FLAG) | DA(OTHER_FLAG), OTHER_FLAG);
383
384 case SLJIT_AND:
385 EMIT_LOGICAL(ANDI, AND);
386 return SLJIT_SUCCESS;
387
388 case SLJIT_OR:
389 EMIT_LOGICAL(ORI, OR);
390 return SLJIT_SUCCESS;
391
392 case SLJIT_XOR:
393 EMIT_LOGICAL(XORI, XOR);
394 return SLJIT_SUCCESS;
395
396 case SLJIT_SHL:
397 EMIT_SHIFT(SLL, SLLV);
398 return SLJIT_SUCCESS;
399
400 case SLJIT_LSHR:
401 EMIT_SHIFT(SRL, SRLV);
402 return SLJIT_SUCCESS;
403
404 case SLJIT_ASHR:
405 EMIT_SHIFT(SRA, SRAV);
406 return SLJIT_SUCCESS;
407 }
408
409 SLJIT_UNREACHABLE();
410 return SLJIT_SUCCESS;
411 }
412
emit_const(struct sljit_compiler * compiler,sljit_s32 dst,sljit_sw init_value)413 static SLJIT_INLINE sljit_s32 emit_const(struct sljit_compiler *compiler, sljit_s32 dst, sljit_sw init_value)
414 {
415 FAIL_IF(push_inst(compiler, LUI | T(dst) | IMM(init_value >> 16), DR(dst)));
416 return push_inst(compiler, ORI | S(dst) | T(dst) | IMM(init_value), DR(dst));
417 }
418
sljit_set_jump_addr(sljit_uw addr,sljit_uw new_target,sljit_sw executable_offset)419 SLJIT_API_FUNC_ATTRIBUTE void sljit_set_jump_addr(sljit_uw addr, sljit_uw new_target, sljit_sw executable_offset)
420 {
421 sljit_ins *inst = (sljit_ins *)addr;
422
423 inst[0] = (inst[0] & 0xffff0000) | ((new_target >> 16) & 0xffff);
424 inst[1] = (inst[1] & 0xffff0000) | (new_target & 0xffff);
425 inst = (sljit_ins *)SLJIT_ADD_EXEC_OFFSET(inst, executable_offset);
426 SLJIT_CACHE_FLUSH(inst, inst + 2);
427 }
428
sljit_set_const(sljit_uw addr,sljit_sw new_constant,sljit_sw executable_offset)429 SLJIT_API_FUNC_ATTRIBUTE void sljit_set_const(sljit_uw addr, sljit_sw new_constant, sljit_sw executable_offset)
430 {
431 sljit_ins *inst = (sljit_ins *)addr;
432
433 inst[0] = (inst[0] & 0xffff0000) | ((new_constant >> 16) & 0xffff);
434 inst[1] = (inst[1] & 0xffff0000) | (new_constant & 0xffff);
435 inst = (sljit_ins *)SLJIT_ADD_EXEC_OFFSET(inst, executable_offset);
436 SLJIT_CACHE_FLUSH(inst, inst + 2);
437 }
438
call_with_args(struct sljit_compiler * compiler,sljit_s32 arg_types,sljit_ins * ins_ptr)439 static sljit_s32 call_with_args(struct sljit_compiler *compiler, sljit_s32 arg_types, sljit_ins *ins_ptr)
440 {
441 sljit_s32 stack_offset = 0;
442 sljit_s32 arg_count = 0;
443 sljit_s32 float_arg_count = 0;
444 sljit_s32 word_arg_count = 0;
445 sljit_s32 types = 0;
446 sljit_s32 arg_count_save, types_save;
447 sljit_ins prev_ins = NOP;
448 sljit_ins ins = NOP;
449 sljit_u8 offsets[4];
450
451 SLJIT_ASSERT(reg_map[TMP_REG1] == 4 && freg_map[TMP_FREG1] == 12);
452
453 arg_types >>= SLJIT_DEF_SHIFT;
454
455 while (arg_types) {
456 types = (types << SLJIT_DEF_SHIFT) | (arg_types & SLJIT_DEF_MASK);
457
458 switch (arg_types & SLJIT_DEF_MASK) {
459 case SLJIT_ARG_TYPE_F32:
460 offsets[arg_count] = (sljit_u8)stack_offset;
461
462 if (word_arg_count == 0 && arg_count <= 1)
463 offsets[arg_count] = 254 + arg_count;
464
465 stack_offset += sizeof(sljit_f32);
466 arg_count++;
467 float_arg_count++;
468 break;
469 case SLJIT_ARG_TYPE_F64:
470 if (stack_offset & 0x7)
471 stack_offset += sizeof(sljit_sw);
472 offsets[arg_count] = (sljit_u8)stack_offset;
473
474 if (word_arg_count == 0 && arg_count <= 1)
475 offsets[arg_count] = 254 + arg_count;
476
477 stack_offset += sizeof(sljit_f64);
478 arg_count++;
479 float_arg_count++;
480 break;
481 default:
482 offsets[arg_count] = (sljit_u8)stack_offset;
483 stack_offset += sizeof(sljit_sw);
484 arg_count++;
485 word_arg_count++;
486 break;
487 }
488
489 arg_types >>= SLJIT_DEF_SHIFT;
490 }
491
492 /* Stack is aligned to 16 bytes, max two doubles can be placed on the stack. */
493 if (stack_offset > 16)
494 FAIL_IF(push_inst(compiler, ADDIU | S(SLJIT_SP) | T(SLJIT_SP) | IMM(-16), DR(SLJIT_SP)));
495
496 types_save = types;
497 arg_count_save = arg_count;
498
499 while (types) {
500 switch (types & SLJIT_DEF_MASK) {
501 case SLJIT_ARG_TYPE_F32:
502 arg_count--;
503 if (offsets[arg_count] < 254)
504 ins = SWC1 | S(SLJIT_SP) | FT(float_arg_count) | IMM(offsets[arg_count]);
505 float_arg_count--;
506 break;
507 case SLJIT_ARG_TYPE_F64:
508 arg_count--;
509 if (offsets[arg_count] < 254)
510 ins = SDC1 | S(SLJIT_SP) | FT(float_arg_count) | IMM(offsets[arg_count]);
511 float_arg_count--;
512 break;
513 default:
514 if (offsets[arg_count - 1] >= 16)
515 ins = SW | S(SLJIT_SP) | T(word_arg_count) | IMM(offsets[arg_count - 1]);
516 else if (arg_count != word_arg_count)
517 ins = ADDU | S(word_arg_count) | TA(0) | DA(4 + (offsets[arg_count - 1] >> 2));
518 else if (arg_count == 1)
519 ins = ADDU | S(SLJIT_R0) | TA(0) | DA(4);
520
521 arg_count--;
522 word_arg_count--;
523 break;
524 }
525
526 if (ins != NOP) {
527 if (prev_ins != NOP)
528 FAIL_IF(push_inst(compiler, prev_ins, MOVABLE_INS));
529 prev_ins = ins;
530 ins = NOP;
531 }
532
533 types >>= SLJIT_DEF_SHIFT;
534 }
535
536 types = types_save;
537 arg_count = arg_count_save;
538
539 while (types) {
540 switch (types & SLJIT_DEF_MASK) {
541 case SLJIT_ARG_TYPE_F32:
542 arg_count--;
543 if (offsets[arg_count] == 254)
544 ins = MOV_S | FMT_S | FS(SLJIT_FR0) | FD(TMP_FREG1);
545 else if (offsets[arg_count] < 16)
546 ins = LW | S(SLJIT_SP) | TA(4 + (offsets[arg_count] >> 2)) | IMM(offsets[arg_count]);
547 break;
548 case SLJIT_ARG_TYPE_F64:
549 arg_count--;
550 if (offsets[arg_count] == 254)
551 ins = MOV_S | FMT_D | FS(SLJIT_FR0) | FD(TMP_FREG1);
552 else if (offsets[arg_count] < 16) {
553 if (prev_ins != NOP)
554 FAIL_IF(push_inst(compiler, prev_ins, MOVABLE_INS));
555 prev_ins = LW | S(SLJIT_SP) | TA(4 + (offsets[arg_count] >> 2)) | IMM(offsets[arg_count]);
556 ins = LW | S(SLJIT_SP) | TA(5 + (offsets[arg_count] >> 2)) | IMM(offsets[arg_count] + sizeof(sljit_sw));
557 }
558 break;
559 default:
560 arg_count--;
561 break;
562 }
563
564 if (ins != NOP) {
565 if (prev_ins != NOP)
566 FAIL_IF(push_inst(compiler, prev_ins, MOVABLE_INS));
567 prev_ins = ins;
568 ins = NOP;
569 }
570
571 types >>= SLJIT_DEF_SHIFT;
572 }
573
574 *ins_ptr = prev_ins;
575
576 return SLJIT_SUCCESS;
577 }
578
post_call_with_args(struct sljit_compiler * compiler,sljit_s32 arg_types)579 static sljit_s32 post_call_with_args(struct sljit_compiler *compiler, sljit_s32 arg_types)
580 {
581 sljit_s32 stack_offset = 0;
582
583 arg_types >>= SLJIT_DEF_SHIFT;
584
585 while (arg_types) {
586 switch (arg_types & SLJIT_DEF_MASK) {
587 case SLJIT_ARG_TYPE_F32:
588 stack_offset += sizeof(sljit_f32);
589 break;
590 case SLJIT_ARG_TYPE_F64:
591 if (stack_offset & 0x7)
592 stack_offset += sizeof(sljit_sw);
593 stack_offset += sizeof(sljit_f64);
594 break;
595 default:
596 stack_offset += sizeof(sljit_sw);
597 break;
598 }
599
600 arg_types >>= SLJIT_DEF_SHIFT;
601 }
602
603 /* Stack is aligned to 16 bytes, max two doubles can be placed on the stack. */
604 if (stack_offset > 16)
605 return push_inst(compiler, ADDIU | S(SLJIT_SP) | T(SLJIT_SP) | IMM(16), DR(SLJIT_SP));
606
607 return SLJIT_SUCCESS;
608 }
609
sljit_emit_call(struct sljit_compiler * compiler,sljit_s32 type,sljit_s32 arg_types)610 SLJIT_API_FUNC_ATTRIBUTE struct sljit_jump* sljit_emit_call(struct sljit_compiler *compiler, sljit_s32 type,
611 sljit_s32 arg_types)
612 {
613 struct sljit_jump *jump;
614 sljit_ins ins;
615
616 CHECK_ERROR_PTR();
617 CHECK_PTR(check_sljit_emit_call(compiler, type, arg_types));
618
619 jump = (struct sljit_jump*)ensure_abuf(compiler, sizeof(struct sljit_jump));
620 PTR_FAIL_IF(!jump);
621 set_jump(jump, compiler, type & SLJIT_REWRITABLE_JUMP);
622 type &= 0xff;
623
624 PTR_FAIL_IF(call_with_args(compiler, arg_types, &ins));
625
626 SLJIT_ASSERT(DR(PIC_ADDR_REG) == 25 && PIC_ADDR_REG == TMP_REG2);
627
628 PTR_FAIL_IF(emit_const(compiler, PIC_ADDR_REG, 0));
629
630 jump->flags |= IS_JAL | IS_CALL;
631 PTR_FAIL_IF(push_inst(compiler, JALR | S(PIC_ADDR_REG) | DA(RETURN_ADDR_REG), UNMOVABLE_INS));
632 jump->addr = compiler->size;
633 PTR_FAIL_IF(push_inst(compiler, ins, UNMOVABLE_INS));
634
635 PTR_FAIL_IF(post_call_with_args(compiler, arg_types));
636
637 return jump;
638 }
639
sljit_emit_icall(struct sljit_compiler * compiler,sljit_s32 type,sljit_s32 arg_types,sljit_s32 src,sljit_sw srcw)640 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_icall(struct sljit_compiler *compiler, sljit_s32 type,
641 sljit_s32 arg_types,
642 sljit_s32 src, sljit_sw srcw)
643 {
644 sljit_ins ins;
645
646 CHECK_ERROR();
647 CHECK(check_sljit_emit_icall(compiler, type, arg_types, src, srcw));
648
649 SLJIT_ASSERT(DR(PIC_ADDR_REG) == 25 && PIC_ADDR_REG == TMP_REG2);
650
651 if (src & SLJIT_IMM)
652 FAIL_IF(load_immediate(compiler, DR(PIC_ADDR_REG), srcw));
653 else if (FAST_IS_REG(src))
654 FAIL_IF(push_inst(compiler, ADDU | S(src) | TA(0) | D(PIC_ADDR_REG), DR(PIC_ADDR_REG)));
655 else if (src & SLJIT_MEM) {
656 ADJUST_LOCAL_OFFSET(src, srcw);
657 FAIL_IF(emit_op_mem(compiler, WORD_DATA | LOAD_DATA, DR(PIC_ADDR_REG), src, srcw));
658 }
659
660 FAIL_IF(call_with_args(compiler, arg_types, &ins));
661
662 /* Register input. */
663 FAIL_IF(push_inst(compiler, JALR | S(PIC_ADDR_REG) | DA(RETURN_ADDR_REG), UNMOVABLE_INS));
664 FAIL_IF(push_inst(compiler, ins, UNMOVABLE_INS));
665 return post_call_with_args(compiler, arg_types);
666 }
667
