1 /* $NetBSD: sljitNativeMIPS_64.c,v 1.4 2019/01/20 23:14:16 alnsn Exp $ */
2
3 /*
4 * Stack-less Just-In-Time compiler
5 *
6 * Copyright Zoltan Herczeg (hzmester@freemail.hu). All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without modification, are
9 * permitted provided that the following conditions are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright notice, this list of
12 * conditions and the following disclaimer.
13 *
14 * 2. Redistributions in binary form must reproduce the above copyright notice, this list
15 * of conditions and the following disclaimer in the documentation and/or other materials
16 * provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) AND CONTRIBUTORS ``AS IS'' AND ANY
19 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
21 * SHALL THE COPYRIGHT HOLDER(S) OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
23 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
24 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
25 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
26 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 /* mips 64-bit arch dependent functions. */
30
load_immediate(struct sljit_compiler * compiler,sljit_s32 dst_ar,sljit_sw imm)31 static sljit_s32 load_immediate(struct sljit_compiler *compiler, sljit_s32 dst_ar, sljit_sw imm)
32 {
33 sljit_s32 shift = 32;
34 sljit_s32 shift2;
35 sljit_s32 inv = 0;
36 sljit_ins ins;
37 sljit_uw uimm;
38
39 if (!(imm & ~0xffff))
40 return push_inst(compiler, ORI | SA(0) | TA(dst_ar) | IMM(imm), dst_ar);
41
42 if (imm < 0 && imm >= SIMM_MIN)
43 return push_inst(compiler, ADDIU | SA(0) | TA(dst_ar) | IMM(imm), dst_ar);
44
45 if (imm <= 0x7fffffffl && imm >= -0x80000000l) {
46 FAIL_IF(push_inst(compiler, LUI | TA(dst_ar) | IMM(imm >> 16), dst_ar));
47 return (imm & 0xffff) ? push_inst(compiler, ORI | SA(dst_ar) | TA(dst_ar) | IMM(imm), dst_ar) : SLJIT_SUCCESS;
48 }
49
50 /* Zero extended number. */
51 uimm = imm;
52 if (imm < 0) {
53 uimm = ~imm;
54 inv = 1;
55 }
56
57 while (!(uimm & 0xff00000000000000l)) {
58 shift -= 8;
59 uimm <<= 8;
60 }
61
62 if (!(uimm & 0xf000000000000000l)) {
63 shift -= 4;
64 uimm <<= 4;
65 }
66
67 if (!(uimm & 0xc000000000000000l)) {
68 shift -= 2;
69 uimm <<= 2;
70 }
71
72 if ((sljit_sw)uimm < 0) {
73 uimm >>= 1;
74 shift += 1;
75 }
76 SLJIT_ASSERT(((uimm & 0xc000000000000000l) == 0x4000000000000000l) && (shift > 0) && (shift <= 32));
77
78 if (inv)
79 uimm = ~uimm;
80
81 FAIL_IF(push_inst(compiler, LUI | TA(dst_ar) | IMM(uimm >> 48), dst_ar));
82 if (uimm & 0x0000ffff00000000l)
83 FAIL_IF(push_inst(compiler, ORI | SA(dst_ar) | TA(dst_ar) | IMM(uimm >> 32), dst_ar));
84
85 imm &= (1l << shift) - 1;
86 if (!(imm & ~0xffff)) {
87 ins = (shift == 32) ? DSLL32 : DSLL;
88 if (shift < 32)
89 ins |= SH_IMM(shift);
90 FAIL_IF(push_inst(compiler, ins | TA(dst_ar) | DA(dst_ar), dst_ar));
91 return !(imm & 0xffff) ? SLJIT_SUCCESS : push_inst(compiler, ORI | SA(dst_ar) | TA(dst_ar) | IMM(imm), dst_ar);
92 }
93
94 /* Double shifts needs to be performed. */
95 uimm <<= 32;
96 shift2 = shift - 16;
97
98 while (!(uimm & 0xf000000000000000l)) {
99 shift2 -= 4;
100 uimm <<= 4;
101 }
102
103 if (!(uimm & 0xc000000000000000l)) {
104 shift2 -= 2;
105 uimm <<= 2;
106 }
107
108 if (!(uimm & 0x8000000000000000l)) {
109 shift2--;
110 uimm <<= 1;
111 }
112
113 SLJIT_ASSERT((uimm & 0x8000000000000000l) && (shift2 > 0) && (shift2 <= 16));
114
115 FAIL_IF(push_inst(compiler, DSLL | TA(dst_ar) | DA(dst_ar) | SH_IMM(shift - shift2), dst_ar));
116 FAIL_IF(push_inst(compiler, ORI | SA(dst_ar) | TA(dst_ar) | IMM(uimm >> 48), dst_ar));
117 FAIL_IF(push_inst(compiler, DSLL | TA(dst_ar) | DA(dst_ar) | SH_IMM(shift2), dst_ar));
118
119 imm &= (1l << shift2) - 1;
120 return !(imm & 0xffff) ? SLJIT_SUCCESS : push_inst(compiler, ORI | SA(dst_ar) | TA(dst_ar) | IMM(imm), dst_ar);
121 }
122
123 #define SELECT_OP(a, b) \
124 (!(op & SLJIT_I32_OP) ? a : b)
125
126 #define EMIT_LOGICAL(op_imm, op_norm) \
127 if (flags & SRC2_IMM) { \
128 if (op & SLJIT_SET_Z) \
129 FAIL_IF(push_inst(compiler, op_imm | S(src1) | TA(EQUAL_FLAG) | IMM(src2), EQUAL_FLAG)); \
130 if (!(flags & UNUSED_DEST)) \
131 FAIL_IF(push_inst(compiler, op_imm | S(src1) | T(dst) | IMM(src2), DR(dst))); \
132 } \
133 else { \
134 if (op & SLJIT_SET_Z) \
135 FAIL_IF(push_inst(compiler, op_norm | S(src1) | T(src2) | DA(EQUAL_FLAG), EQUAL_FLAG)); \
136 if (!(flags & UNUSED_DEST)) \
137 FAIL_IF(push_inst(compiler, op_norm | S(src1) | T(src2) | D(dst), DR(dst))); \
138 }
139
140 #define EMIT_SHIFT(op_dimm, op_dimm32, op_imm, op_dv, op_v) \
141 if (flags & SRC2_IMM) { \
142 if (src2 >= 32) { \
143 SLJIT_ASSERT(!(op & SLJIT_I32_OP)); \
144 ins = op_dimm32; \
145 src2 -= 32; \
146 } \
147 else \
148 ins = (op & SLJIT_I32_OP) ? op_imm : op_dimm; \
149 if (op & SLJIT_SET_Z) \
150 FAIL_IF(push_inst(compiler, ins | T(src1) | DA(EQUAL_FLAG) | SH_IMM(src2), EQUAL_FLAG)); \
151 if (!(flags & UNUSED_DEST)) \
152 FAIL_IF(push_inst(compiler, ins | T(src1) | D(dst) | SH_IMM(src2), DR(dst))); \
153 } \
154 else { \
155 ins = (op & SLJIT_I32_OP) ? op_v : op_dv; \
156 if (op & SLJIT_SET_Z) \
157 FAIL_IF(push_inst(compiler, ins | S(src2) | T(src1) | DA(EQUAL_FLAG), EQUAL_FLAG)); \
158 if (!(flags & UNUSED_DEST)) \
159 FAIL_IF(push_inst(compiler, ins | S(src2) | T(src1) | D(dst), DR(dst))); \
160 }
161
emit_single_op(struct sljit_compiler * compiler,sljit_s32 op,sljit_s32 flags,sljit_s32 dst,sljit_s32 src1,sljit_sw src2)162 static SLJIT_INLINE sljit_s32 emit_single_op(struct sljit_compiler *compiler, sljit_s32 op, sljit_s32 flags,
163 sljit_s32 dst, sljit_s32 src1, sljit_sw src2)
164 {
165 sljit_ins ins;
166 sljit_s32 is_overflow, is_carry, is_handled;
167
168 switch (GET_OPCODE(op)) {
169 case SLJIT_MOV:
170 case SLJIT_MOV_P:
171 SLJIT_ASSERT(src1 == TMP_REG1 && !(flags & SRC2_IMM));
172 if (dst != src2)
173 return push_inst(compiler, SELECT_OP(DADDU, ADDU) | S(src2) | TA(0) | D(dst), DR(dst));
174 return SLJIT_SUCCESS;
175
176 case SLJIT_MOV_U8:
177 case SLJIT_MOV_S8:
178 SLJIT_ASSERT(src1 == TMP_REG1 && !(flags & SRC2_IMM));
179 if ((flags & (REG_DEST | REG2_SOURCE)) == (REG_DEST | REG2_SOURCE)) {
180 if (op == SLJIT_MOV_S8) {
181 FAIL_IF(push_inst(compiler, DSLL32 | T(src2) | D(dst) | SH_IMM(24), DR(dst)));
182 return push_inst(compiler, DSRA32 | T(dst) | D(dst) | SH_IMM(24), DR(dst));
183 }
184 return push_inst(compiler, ANDI | S(src2) | T(dst) | IMM(0xff), DR(dst));
185 }
186 else {
187 SLJIT_ASSERT(dst == src2);
188 }
189 return SLJIT_SUCCESS;
190
191 case SLJIT_MOV_U16:
192 case SLJIT_MOV_S16:
193 SLJIT_ASSERT(src1 == TMP_REG1 && !(flags & SRC2_IMM));
194 if ((flags & (REG_DEST | REG2_SOURCE)) == (REG_DEST | REG2_SOURCE)) {
195 if (op == SLJIT_MOV_S16) {
196 FAIL_IF(push_inst(compiler, DSLL32 | T(src2) | D(dst) | SH_IMM(16), DR(dst)));
197 return push_inst(compiler, DSRA32 | T(dst) | D(dst) | SH_IMM(16), DR(dst));
198 }
199 return push_inst(compiler, ANDI | S(src2) | T(dst) | IMM(0xffff), DR(dst));
200 }
201 else {
202 SLJIT_ASSERT(dst == src2);
203 }
204 return SLJIT_SUCCESS;
205
206 case SLJIT_MOV_U32:
207 SLJIT_ASSERT(!(op & SLJIT_I32_OP));
208 FAIL_IF(push_inst(compiler, DSLL32 | T(src2) | D(dst) | SH_IMM(0), DR(dst)));
209 return push_inst(compiler, DSRL32 | T(dst) | D(dst) | SH_IMM(0), DR(dst));
210
211 case SLJIT_MOV_S32:
212 SLJIT_ASSERT(src1 == TMP_REG1 && !(flags & SRC2_IMM));
213 return push_inst(compiler, SLL | T(src2) | D(dst) | SH_IMM(0), DR(dst));
214
215 case SLJIT_NOT:
216 SLJIT_ASSERT(src1 == TMP_REG1 && !(flags & SRC2_IMM));
217 if (op & SLJIT_SET_Z)
218 FAIL_IF(push_inst(compiler, NOR | S(src2) | T(src2) | DA(EQUAL_FLAG), EQUAL_FLAG));
219 if (!(flags & UNUSED_DEST))
220 FAIL_IF(push_inst(compiler, NOR | S(src2) | T(src2) | D(dst), DR(dst)));
221 return SLJIT_SUCCESS;
222
223 case SLJIT_CLZ:
224 SLJIT_ASSERT(src1 == TMP_REG1 && !(flags & SRC2_IMM));
225 #if (defined SLJIT_MIPS_R1 && SLJIT_MIPS_R1)
226 if (op & SLJIT_SET_Z)
227 FAIL_IF(push_inst(compiler, SELECT_OP(DCLZ, CLZ) | S(src2) | TA(EQUAL_FLAG) | DA(EQUAL_FLAG), EQUAL_FLAG));
228 if (!(flags & UNUSED_DEST))
229 FAIL_IF(push_inst(compiler, SELECT_OP(DCLZ, CLZ) | S(src2) | T(dst) | D(dst), DR(dst)));
230 #else
231 if (SLJIT_UNLIKELY(flags & UNUSED_DEST)) {
232 FAIL_IF(push_inst(compiler, SELECT_OP(DSRL32, SRL) | T(src2) | DA(EQUAL_FLAG) | SH_IMM(31), EQUAL_FLAG));
233 return push_inst(compiler, XORI | SA(EQUAL_FLAG) | TA(EQUAL_FLAG) | IMM(1), EQUAL_FLAG);
234 }
235 /* Nearly all instructions are unmovable in the following sequence. */
236 FAIL_IF(push_inst(compiler, SELECT_OP(DADDU, ADDU) | S(src2) | TA(0) | D(TMP_REG1), DR(TMP_REG1)));
237 /* Check zero. */
238 FAIL_IF(push_inst(compiler, BEQ | S(TMP_REG1) | TA(0) | IMM(5), UNMOVABLE_INS));
239 FAIL_IF(push_inst(compiler, ORI | SA(0) | T(dst) | IMM((op & SLJIT_I32_OP) ? 32 : 64), UNMOVABLE_INS));
240 FAIL_IF(push_inst(compiler, SELECT_OP(DADDIU, ADDIU) | SA(0) | T(dst) | IMM(-1), DR(dst)));
241 /* Loop for searching the highest bit. */
242 FAIL_IF(push_inst(compiler, SELECT_OP(DADDIU, ADDIU) | S(dst) | T(dst) | IMM(1), DR(dst)));
243 FAIL_IF(push_inst(compiler, BGEZ | S(TMP_REG1) | IMM(-2), UNMOVABLE_INS));
244 FAIL_IF(push_inst(compiler, SELECT_OP(DSLL, SLL) | T(TMP_REG1) | D(TMP_REG1) | SH_IMM(1), UNMOVABLE_INS));
245 if (op & SLJIT_SET_Z)
246 return push_inst(compiler, SELECT_OP(DADDU, ADDU) | S(dst) | TA(0) | DA(EQUAL_FLAG), EQUAL_FLAG);
247 #endif
248 return SLJIT_SUCCESS;
249
250 case SLJIT_ADD:
251 is_overflow = GET_FLAG_TYPE(op) == SLJIT_OVERFLOW || GET_FLAG_TYPE(op) == SLJIT_NOT_OVERFLOW;
252 is_carry = GET_FLAG_TYPE(op) == GET_FLAG_TYPE(SLJIT_SET_CARRY);
253
254 if (flags & SRC2_IMM) {
255 if (is_overflow) {
256 if (src2 >= 0)
257 FAIL_IF(push_inst(compiler, OR | S(src1) | T(src1) | DA(EQUAL_FLAG), EQUAL_FLAG));
258 else
259 FAIL_IF(push_inst(compiler, NOR | S(src1) | T(src1) | DA(EQUAL_FLAG), EQUAL_FLAG));
260 }
261 else if (op & SLJIT_SET_Z)
262 FAIL_IF(push_inst(compiler, SELECT_OP(DADDIU, ADDIU) | S(src1) | TA(EQUAL_FLAG) | IMM(src2), EQUAL_FLAG));
263
264 if (is_overflow || is_carry) {
265 if (src2 >= 0)
266 FAIL_IF(push_inst(compiler, ORI | S(src1) | TA(OTHER_FLAG) | IMM(src2), OTHER_FLAG));
267 else {
268 FAIL_IF(push_inst(compiler, SELECT_OP(DADDIU, ADDIU) | SA(0) | TA(OTHER_FLAG) | IMM(src2), OTHER_FLAG));
269 FAIL_IF(push_inst(compiler, OR | S(src1) | TA(OTHER_FLAG) | DA(OTHER_FLAG), OTHER_FLAG));
270 }
271 }
272 /* dst may be the same as src1 or src2. */
273 if (!(flags & UNUSED_DEST) || (op & VARIABLE_FLAG_MASK))
274 FAIL_IF(push_inst(compiler, SELECT_OP(DADDIU, ADDIU) | S(src1) | T(dst) | IMM(src2), DR(dst)));
275 }
276 else {
277 if (is_overflow)
278 FAIL_IF(push_inst(compiler, XOR | S(src1) | T(src2) | DA(EQUAL_FLAG), EQUAL_FLAG));
279 else if (op & SLJIT_SET_Z)
280 FAIL_IF(push_inst(compiler, SELECT_OP(DADDU, ADDU) | S(src1) | T(src2) | DA(EQUAL_FLAG), EQUAL_FLAG));
281
282 if (is_overflow || is_carry)
283 FAIL_IF(push_inst(compiler, OR | S(src1) | T(src2) | DA(OTHER_FLAG), OTHER_FLAG));
284 /* dst may be the same as src1 or src2. */
285 if (!(flags & UNUSED_DEST) || (op & VARIABLE_FLAG_MASK))
286 FAIL_IF(push_inst(compiler, SELECT_OP(DADDU, ADDU) | S(src1) | T(src2) | D(dst), DR(dst)));
287 }
288
289 /* a + b >= a | b (otherwise, the carry should be set to 1). */
290 if (is_overflow || is_carry)
291 FAIL_IF(push_inst(compiler, SLTU | S(dst) | TA(OTHER_FLAG) | DA(OTHER_FLAG), OTHER_FLAG));
292 if (!is_overflow)
293 return SLJIT_SUCCESS;
294 FAIL_IF(push_inst(compiler, SELECT_OP(DSLL32, SLL) | TA(OTHER_FLAG) | D(TMP_REG1) | SH_IMM(31), DR(TMP_REG1)));
295 FAIL_IF(push_inst(compiler, XOR | S(TMP_REG1) | TA(EQUAL_FLAG) | DA(EQUAL_FLAG), EQUAL_FLAG));
296 FAIL_IF(push_inst(compiler, XOR | S(dst) | TA(EQUAL_FLAG) | DA(OTHER_FLAG), OTHER_FLAG));
297 if (op & SLJIT_SET_Z)
298 FAIL_IF(push_inst(compiler, SELECT_OP(DADDU, ADDU) | S(dst) | TA(0) | DA(EQUAL_FLAG), EQUAL_FLAG));
299 return push_inst(compiler, SELECT_OP(DSRL32, SRL) | TA(OTHER_FLAG) | DA(OTHER_FLAG) | SH_IMM(31), OTHER_FLAG);
300
301 case SLJIT_ADDC:
302 is_carry = GET_FLAG_TYPE(op) == GET_FLAG_TYPE(SLJIT_SET_CARRY);
303
304 if (flags & SRC2_IMM) {
305 if (is_carry) {
306 if (src2 >= 0)
307 FAIL_IF(push_inst(compiler, ORI | S(src1) | TA(EQUAL_FLAG) | IMM(src2), EQUAL_FLAG));
308 else {
309 FAIL_IF(push_inst(compiler, SELECT_OP(DADDIU, ADDIU) | SA(0) | TA(EQUAL_FLAG) | IMM(src2), EQUAL_FLAG));
310 FAIL_IF(push_inst(compiler, OR | S(src1) | TA(EQUAL_FLAG) | DA(EQUAL_FLAG), EQUAL_FLAG));
311 }
312 }
313 FAIL_IF(push_inst(compiler, SELECT_OP(DADDIU, ADDIU) | S(src1) | T(dst) | IMM(src2), DR(dst)));
314 } else {
315 if (is_carry)
316 FAIL_IF(push_inst(compiler, OR | S(src1) | T(src2) | DA(EQUAL_FLAG), EQUAL_FLAG));
317 /* dst may be the same as src1 or src2. */
318 FAIL_IF(push_inst(compiler, SELECT_OP(DADDU, ADDU) | S(src1) | T(src2) | D(dst), DR(dst)));
319 }
320 if (is_carry)
321 FAIL_IF(push_inst(compiler, SLTU | S(dst) | TA(EQUAL_FLAG) | DA(EQUAL_FLAG), EQUAL_FLAG));
322
323 FAIL_IF(push_inst(compiler, SELECT_OP(DADDU, ADDU) | S(dst) | TA(OTHER_FLAG) | D(dst), DR(dst)));
324 if (!is_carry)
325 return SLJIT_SUCCESS;
326
327 /* Set ULESS_FLAG (dst == 0) && (OTHER_FLAG == 1). */
328 FAIL_IF(push_inst(compiler, SLTU | S(dst) | TA(OTHER_FLAG) | DA(OTHER_FLAG), OTHER_FLAG));
329 /* Set carry flag. */
330 return push_inst(compiler, OR | SA(OTHER_FLAG) | TA(EQUAL_FLAG) | DA(OTHER_FLAG), OTHER_FLAG);
331
332 case SLJIT_SUB:
333 if ((flags & SRC2_IMM) && src2 == SIMM_MIN) {
334 FAIL_IF(push_inst(compiler, ADDIU | SA(0) | T(TMP_REG2) | IMM(src2), DR(TMP_REG2)));
335 src2 = TMP_REG2;
336 flags &= ~SRC2_IMM;
337 }
338
339 is_handled = 0;
340
341 if (flags & SRC2_IMM) {
342 if (GET_FLAG_TYPE(op) == SLJIT_LESS || GET_FLAG_TYPE(op) == SLJIT_GREATER_EQUAL) {
343 FAIL_IF(push_inst(compiler, SLTIU | S(src1) | TA(OTHER_FLAG) | IMM(src2), OTHER_FLAG));
344 is_handled = 1;
345 }
346 else if (GET_FLAG_TYPE(op) == SLJIT_SIG_LESS || GET_FLAG_TYPE(op) == SLJIT_SIG_GREATER_EQUAL) {
347 FAIL_IF(push_inst(compiler, SLTI | S(src1) | TA(OTHER_FLAG) | IMM(src2), OTHER_FLAG));
348 is_handled = 1;
349 }
350 }
351
352 if (!is_handled && GET_FLAG_TYPE(op) >= SLJIT_LESS && GET_FLAG_TYPE(op) <= SLJIT_SIG_LESS_EQUAL) {
353 is_handled = 1;
354
355 if (flags & SRC2_IMM) {
356 FAIL_IF(push_inst(compiler, ADDIU | SA(0) | T(TMP_REG2) | IMM(src2), DR(TMP_REG2)));
357 src2 = TMP_REG2;
358 flags &= ~SRC2_IMM;
359 }
360
361 if (GET_FLAG_TYPE(op) == SLJIT_LESS || GET_FLAG_TYPE(op) == SLJIT_GREATER_EQUAL) {
362 FAIL_IF(push_inst(compiler, SLTU | S(src1) | T(src2) | DA(OTHER_FLAG), OTHER_FLAG));
363 }
364 else if (GET_FLAG_TYPE(op) == SLJIT_GREATER || GET_FLAG_TYPE(op) == SLJIT_LESS_EQUAL)
365 {
366 FAIL_IF(push_inst(compiler, SLTU | S(src2) | T(src1) | DA(OTHER_FLAG), OTHER_FLAG));
367 }
368 else if (GET_FLAG_TYPE(op) == SLJIT_SIG_LESS || GET_FLAG_TYPE(op) == SLJIT_SIG_GREATER_EQUAL) {
369 FAIL_IF(push_inst(compiler, SLT | S(src1) | T(src2) | DA(OTHER_FLAG), OTHER_FLAG));
370 }
371 else if (GET_FLAG_TYPE(op) == SLJIT_SIG_GREATER || GET_FLAG_TYPE(op) == SLJIT_SIG_LESS_EQUAL)
372 {
373 FAIL_IF(push_inst(compiler, SLT | S(src2) | T(src1) | DA(OTHER_FLAG), OTHER_FLAG));
374 }
375 }
376
377 if (is_handled) {
378 if (flags & SRC2_IMM) {
379 if (op & SLJIT_SET_Z)
380 FAIL_IF(push_inst(compiler, SELECT_OP(DADDIU, ADDIU) | S(src1) | TA(EQUAL_FLAG) | IMM(-src2), EQUAL_FLAG));
381 if (!(flags & UNUSED_DEST))
382 return push_inst(compiler, SELECT_OP(DADDIU, ADDIU) | S(src1) | T(dst) | IMM(-src2), DR(dst));
383 }
384 else {
385 if (op & SLJIT_SET_Z)
386 FAIL_IF(push_inst(compiler, SELECT_OP(DSUBU, SUBU) | S(src1) | T(src2) | DA(EQUAL_FLAG), EQUAL_FLAG));
387 if (!(flags & UNUSED_DEST))
388 return push_inst(compiler, SELECT_OP(DSUBU, SUBU) | S(src1) | T(src2) | D(dst), DR(dst));
389 }
390 return SLJIT_SUCCESS;
391 }
392
393 is_overflow = GET_FLAG_TYPE(op) == SLJIT_OVERFLOW || GET_FLAG_TYPE(op) == SLJIT_NOT_OVERFLOW;
394 is_carry = GET_FLAG_TYPE(op) == GET_FLAG_TYPE(SLJIT_SET_CARRY);
395
396 if (flags & SRC2_IMM) {
397 if (is_overflow) {
398 if (src2 >= 0)
399 FAIL_IF(push_inst(compiler, OR | S(src1) | T(src1) | DA(EQUAL_FLAG), EQUAL_FLAG));
400 else
401 FAIL_IF(push_inst(compiler, NOR | S(src1) | T(src1) | DA(EQUAL_FLAG), EQUAL_FLAG));
402 }
403 else if (op & SLJIT_SET_Z)
404 FAIL_IF(push_inst(compiler, SELECT_OP(DADDIU, ADDIU) | S(src1) | TA(EQUAL_FLAG) | IMM(-src2), EQUAL_FLAG));
405
406 if (is_overflow || is_carry)
407 FAIL_IF(push_inst(compiler, SLTIU | S(src1) | TA(OTHER_FLAG) | IMM(src2), OTHER_FLAG));
408 /* dst may be the same as src1 or src2. */
409 if (!(flags & UNUSED_DEST) || (op & VARIABLE_FLAG_MASK))
410 FAIL_IF(push_inst(compiler, SELECT_OP(DADDIU, ADDIU) | S(src1) | T(dst) | IMM(-src2), DR(dst)));
411 }
412 else {
413 if (is_overflow)
414 FAIL_IF(push_inst(compiler, XOR | S(src1) | T(src2) | DA(EQUAL_FLAG), EQUAL_FLAG));
415 else if (op & SLJIT_SET_Z)
416 FAIL_IF(push_inst(compiler, SELECT_OP(DSUBU, SUBU) | S(src1) | T(src2) | DA(EQUAL_FLAG), EQUAL_FLAG));
417
418 if (is_overflow || is_carry)
419 FAIL_IF(push_inst(compiler, SLTU | S(src1) | T(src2) | DA(OTHER_FLAG), OTHER_FLAG));
420 /* dst may be the same as src1 or src2. */
421 if (!(flags & UNUSED_DEST) || (op & VARIABLE_FLAG_MASK))
422 FAIL_IF(push_inst(compiler, SELECT_OP(DSUBU, SUBU) | S(src1) | T(src2) | D(dst), DR(dst)));
423 }
424
425 if (!is_overflow)
426 return SLJIT_SUCCESS;
427 FAIL_IF(push_inst(compiler, SELECT_OP(DSLL32, SLL) | TA(OTHER_FLAG) | D(TMP_REG1) | SH_IMM(31), DR(TMP_REG1)));
428 FAIL_IF(push_inst(compiler, XOR | S(TMP_REG1) | TA(EQUAL_FLAG) | DA(EQUAL_FLAG), EQUAL_FLAG));
429 FAIL_IF(push_inst(compiler, XOR | S(dst) | TA(EQUAL_FLAG) | DA(OTHER_FLAG), OTHER_FLAG));
430 if (op & SLJIT_SET_Z)
431 FAIL_IF(push_inst(compiler, SELECT_OP(DADDU, ADDU) | S(dst) | TA(0) | DA(EQUAL_FLAG), EQUAL_FLAG));
432 return push_inst(compiler, SELECT_OP(DSRL32, SRL) | TA(OTHER_FLAG) | DA(OTHER_FLAG) | SH_IMM(31), OTHER_FLAG);
433
434 case SLJIT_SUBC:
435 if ((flags & SRC2_IMM) && src2 == SIMM_MIN) {
436 FAIL_IF(push_inst(compiler, ADDIU | SA(0) | T(TMP_REG2) | IMM(src2), DR(TMP_REG2)));
437 src2 = TMP_REG2;
438 flags &= ~SRC2_IMM;
439 }
440
441 is_carry = GET_FLAG_TYPE(op) == GET_FLAG_TYPE(SLJIT_SET_CARRY);
442
443 if (flags & SRC2_IMM) {
444 if (is_carry)
445 FAIL_IF(push_inst(compiler, SLTIU | S(src1) | TA(EQUAL_FLAG) | IMM(src2), EQUAL_FLAG));
446 /* dst may be the same as src1 or src2. */
447 FAIL_IF(push_inst(compiler, SELECT_OP(DADDIU, ADDIU) | S(src1) | T(dst) | IMM(-src2), DR(dst)));
448 }
449 else {
450 if (is_carry)
451 FAIL_IF(push_inst(compiler, SLTU | S(src1) | T(src2) | DA(EQUAL_FLAG), EQUAL_FLAG));
452 /* dst may be the same as src1 or src2. */
453 FAIL_IF(push_inst(compiler, SELECT_OP(DSUBU, SUBU) | S(src1) | T(src2) | D(dst), DR(dst)));
454 }
455
456 if (is_carry)
457 FAIL_IF(push_inst(compiler, SLTU | S(dst) | TA(OTHER_FLAG) | D(TMP_REG1), DR(TMP_REG1)));
458
459 FAIL_IF(push_inst(compiler, SELECT_OP(DSUBU, SUBU) | S(dst) | TA(OTHER_FLAG) | D(dst), DR(dst)));
460 return (is_carry) ? push_inst(compiler, OR | SA(EQUAL_FLAG) | T(TMP_REG1) | DA(OTHER_FLAG), OTHER_FLAG) : SLJIT_SUCCESS;
461
462 case SLJIT_MUL:
463 SLJIT_ASSERT(!(flags & SRC2_IMM));
464
465 if (GET_FLAG_TYPE(op) != SLJIT_MUL_OVERFLOW && GET_FLAG_TYPE(op) != SLJIT_MUL_NOT_OVERFLOW) {
466 #if (defined SLJIT_MIPS_R1 && SLJIT_MIPS_R1)
467 if (op & SLJIT_I32_OP)
468 return push_inst(compiler, MUL | S(src1) | T(src2) | D(dst), DR(dst));
469 FAIL_IF(push_inst(compiler, DMULT | S(src1) | T(src2), MOVABLE_INS));
470 return push_inst(compiler, MFLO | D(dst), DR(dst));
471 #else
472 FAIL_IF(push_inst(compiler, SELECT_OP(DMULT, MULT) | S(src1) | T(src2), MOVABLE_INS));
473 return push_inst(compiler, MFLO | D(dst), DR(dst));
474 #endif
475 }
476 FAIL_IF(push_inst(compiler, SELECT_OP(DMULT, MULT) | S(src1) | T(src2), MOVABLE_INS));
477 FAIL_IF(push_inst(compiler, MFHI | DA(EQUAL_FLAG), EQUAL_FLAG));
478 FAIL_IF(push_inst(compiler, MFLO | D(dst), DR(dst)));
479 FAIL_IF(push_inst(compiler, SELECT_OP(DSRA32, SRA) | T(dst) | DA(OTHER_FLAG) | SH_IMM(31), OTHER_FLAG));
480 return push_inst(compiler, SELECT_OP(DSUBU, SUBU) | SA(EQUAL_FLAG) | TA(OTHER_FLAG) | DA(OTHER_FLAG), OTHER_FLAG);
481
482 case SLJIT_AND:
483 EMIT_LOGICAL(ANDI, AND);
484 return SLJIT_SUCCESS;
485
486 case SLJIT_OR:
487 EMIT_LOGICAL(ORI, OR);
488 return SLJIT_SUCCESS;
489
490 case SLJIT_XOR:
491 EMIT_LOGICAL(XORI, XOR);
492 return SLJIT_SUCCESS;
493
494 case SLJIT_SHL:
495 EMIT_SHIFT(DSLL, DSLL32, SLL, DSLLV, SLLV);
496 return SLJIT_SUCCESS;
497
498 case SLJIT_LSHR:
499 EMIT_SHIFT(DSRL, DSRL32, SRL, DSRLV, SRLV);
500 return SLJIT_SUCCESS;
501
502 case SLJIT_ASHR:
503 EMIT_SHIFT(DSRA, DSRA32, SRA, DSRAV, SRAV);
504 return SLJIT_SUCCESS;
505 }
506
507 SLJIT_UNREACHABLE();
508 return SLJIT_SUCCESS;
509 }
510
emit_const(struct sljit_compiler * compiler,sljit_s32 dst,sljit_sw init_value)511 static SLJIT_INLINE sljit_s32 emit_const(struct sljit_compiler *compiler, sljit_s32 dst, sljit_sw init_value)
512 {
513 FAIL_IF(push_inst(compiler, LUI | T(dst) | IMM(init_value >> 48), DR(dst)));
514 FAIL_IF(push_inst(compiler, ORI | S(dst) | T(dst) | IMM(init_value >> 32), DR(dst)));
515 FAIL_IF(push_inst(compiler, DSLL | T(dst) | D(dst) | SH_IMM(16), DR(dst)));
516 FAIL_IF(push_inst(compiler, ORI | S(dst) | T(dst) | IMM(init_value >> 16), DR(dst)));
517 FAIL_IF(push_inst(compiler, DSLL | T(dst) | D(dst) | SH_IMM(16), DR(dst)));
518 return push_inst(compiler, ORI | S(dst) | T(dst) | IMM(init_value), DR(dst));
519 }
520
sljit_set_jump_addr(sljit_uw addr,sljit_uw new_target,sljit_sw executable_offset)521 SLJIT_API_FUNC_ATTRIBUTE void sljit_set_jump_addr(sljit_uw addr, sljit_uw new_target, sljit_sw executable_offset)
522 {
523 sljit_ins *inst = (sljit_ins *)addr;
524
525 inst[0] = (inst[0] & 0xffff0000) | ((new_target >> 48) & 0xffff);
526 inst[1] = (inst[1] & 0xffff0000) | ((new_target >> 32) & 0xffff);
527 inst[3] = (inst[3] & 0xffff0000) | ((new_target >> 16) & 0xffff);
528 inst[5] = (inst[5] & 0xffff0000) | (new_target & 0xffff);
529 inst = (sljit_ins *)SLJIT_ADD_EXEC_OFFSET(inst, executable_offset);
530 SLJIT_CACHE_FLUSH(inst, inst + 6);
531 }
532
sljit_set_const(sljit_uw addr,sljit_sw new_constant,sljit_sw executable_offset)533 SLJIT_API_FUNC_ATTRIBUTE void sljit_set_const(sljit_uw addr, sljit_sw new_constant, sljit_sw executable_offset)
534 {
535 sljit_ins *inst = (sljit_ins *)addr;
536
537 inst[0] = (inst[0] & 0xffff0000) | ((new_constant >> 48) & 0xffff);
538 inst[1] = (inst[1] & 0xffff0000) | ((new_constant >> 32) & 0xffff);
539 inst[3] = (inst[3] & 0xffff0000) | ((new_constant >> 16) & 0xffff);
540 inst[5] = (inst[5] & 0xffff0000) | (new_constant & 0xffff);
541 inst = (sljit_ins *)SLJIT_ADD_EXEC_OFFSET(inst, executable_offset);
542 SLJIT_CACHE_FLUSH(inst, inst + 6);
543 }
544