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 64-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 sljit_s32 shift = 32;
32 sljit_s32 shift2;
33 sljit_s32 inv = 0;
34 sljit_ins ins;
35 sljit_uw uimm;
36
37 if (!(imm & ~0xffff))
38 return push_inst(compiler, ORI | SA(0) | TA(dst_ar) | IMM(imm), dst_ar);
39
40 if (imm < 0 && imm >= SIMM_MIN)
41 return push_inst(compiler, ADDIU | SA(0) | TA(dst_ar) | IMM(imm), dst_ar);
42
43 if (imm <= 0x7fffffffl && imm >= -0x80000000l) {
44 FAIL_IF(push_inst(compiler, LUI | TA(dst_ar) | IMM(imm >> 16), dst_ar));
45 return (imm & 0xffff) ? push_inst(compiler, ORI | SA(dst_ar) | TA(dst_ar) | IMM(imm), dst_ar) : SLJIT_SUCCESS;
46 }
47
48 /* Zero extended number. */
49 uimm = imm;
50 if (imm < 0) {
51 uimm = ~imm;
52 inv = 1;
53 }
54
55 while (!(uimm & 0xff00000000000000l)) {
56 shift -= 8;
57 uimm <<= 8;
58 }
59
60 if (!(uimm & 0xf000000000000000l)) {
61 shift -= 4;
62 uimm <<= 4;
63 }
64
65 if (!(uimm & 0xc000000000000000l)) {
66 shift -= 2;
67 uimm <<= 2;
68 }
69
70 if ((sljit_sw)uimm < 0) {
71 uimm >>= 1;
72 shift += 1;
73 }
74 SLJIT_ASSERT(((uimm & 0xc000000000000000l) == 0x4000000000000000l) && (shift > 0) && (shift <= 32));
75
76 if (inv)
77 uimm = ~uimm;
78
79 FAIL_IF(push_inst(compiler, LUI | TA(dst_ar) | IMM(uimm >> 48), dst_ar));
80 if (uimm & 0x0000ffff00000000l)
81 FAIL_IF(push_inst(compiler, ORI | SA(dst_ar) | TA(dst_ar) | IMM(uimm >> 32), dst_ar));
82
83 imm &= (1l << shift) - 1;
84 if (!(imm & ~0xffff)) {
85 ins = (shift == 32) ? DSLL32 : DSLL;
86 if (shift < 32)
87 ins |= SH_IMM(shift);
88 FAIL_IF(push_inst(compiler, ins | TA(dst_ar) | DA(dst_ar), dst_ar));
89 return !(imm & 0xffff) ? SLJIT_SUCCESS : push_inst(compiler, ORI | SA(dst_ar) | TA(dst_ar) | IMM(imm), dst_ar);
90 }
91
92 /* Double shifts needs to be performed. */
93 uimm <<= 32;
94 shift2 = shift - 16;
95
96 while (!(uimm & 0xf000000000000000l)) {
97 shift2 -= 4;
98 uimm <<= 4;
99 }
100
101 if (!(uimm & 0xc000000000000000l)) {
102 shift2 -= 2;
103 uimm <<= 2;
104 }
105
106 if (!(uimm & 0x8000000000000000l)) {
107 shift2--;
108 uimm <<= 1;
109 }
110
111 SLJIT_ASSERT((uimm & 0x8000000000000000l) && (shift2 > 0) && (shift2 <= 16));
112
113 FAIL_IF(push_inst(compiler, DSLL | TA(dst_ar) | DA(dst_ar) | SH_IMM(shift - shift2), dst_ar));
114 FAIL_IF(push_inst(compiler, ORI | SA(dst_ar) | TA(dst_ar) | IMM(uimm >> 48), dst_ar));
115 FAIL_IF(push_inst(compiler, DSLL | TA(dst_ar) | DA(dst_ar) | SH_IMM(shift2), dst_ar));
116
117 imm &= (1l << shift2) - 1;
118 return !(imm & 0xffff) ? SLJIT_SUCCESS : push_inst(compiler, ORI | SA(dst_ar) | TA(dst_ar) | IMM(imm), dst_ar);
119 }
120
121 #define SELECT_OP(a, b) \
122 (!(op & SLJIT_I32_OP) ? a : b)
123
124 #define EMIT_LOGICAL(op_imm, op_norm) \
125 if (flags & SRC2_IMM) { \
126 if (op & SLJIT_SET_Z) \
127 FAIL_IF(push_inst(compiler, op_imm | S(src1) | TA(EQUAL_FLAG) | IMM(src2), EQUAL_FLAG)); \
128 if (!(flags & UNUSED_DEST)) \
129 FAIL_IF(push_inst(compiler, op_imm | S(src1) | T(dst) | IMM(src2), DR(dst))); \
130 } \
131 else { \
132 if (op & SLJIT_SET_Z) \
133 FAIL_IF(push_inst(compiler, op_norm | S(src1) | T(src2) | DA(EQUAL_FLAG), EQUAL_FLAG)); \
134 if (!(flags & UNUSED_DEST)) \
135 FAIL_IF(push_inst(compiler, op_norm | S(src1) | T(src2) | D(dst), DR(dst))); \
136 }
137
138 #define EMIT_SHIFT(op_dimm, op_dimm32, op_imm, op_dv, op_v) \
139 if (flags & SRC2_IMM) { \
140 if (src2 >= 32) { \
141 SLJIT_ASSERT(!(op & SLJIT_I32_OP)); \
142 ins = op_dimm32; \
143 src2 -= 32; \
144 } \
145 else \
146 ins = (op & SLJIT_I32_OP) ? op_imm : op_dimm; \
147 if (op & SLJIT_SET_Z) \
148 FAIL_IF(push_inst(compiler, ins | T(src1) | DA(EQUAL_FLAG) | SH_IMM(src2), EQUAL_FLAG)); \
149 if (!(flags & UNUSED_DEST)) \
150 FAIL_IF(push_inst(compiler, ins | T(src1) | D(dst) | SH_IMM(src2), DR(dst))); \
151 } \
152 else { \
153 ins = (op & SLJIT_I32_OP) ? op_v : op_dv; \
154 if (op & SLJIT_SET_Z) \
155 FAIL_IF(push_inst(compiler, ins | S(src2) | T(src1) | DA(EQUAL_FLAG), EQUAL_FLAG)); \
156 if (!(flags & UNUSED_DEST)) \
157 FAIL_IF(push_inst(compiler, ins | S(src2) | T(src1) | D(dst), DR(dst))); \
158 }
159
emit_single_op(struct sljit_compiler * compiler,sljit_s32 op,sljit_s32 flags,sljit_s32 dst,sljit_s32 src1,sljit_sw src2)160 static SLJIT_INLINE sljit_s32 emit_single_op(struct sljit_compiler *compiler, sljit_s32 op, sljit_s32 flags,
161 sljit_s32 dst, sljit_s32 src1, sljit_sw src2)
162 {
163 sljit_ins ins;
164 sljit_s32 is_overflow, is_carry, is_handled;
165
166 switch (GET_OPCODE(op)) {
167 case SLJIT_MOV:
168 case SLJIT_MOV_P:
169 SLJIT_ASSERT(src1 == TMP_REG1 && !(flags & SRC2_IMM));
170 if (dst != src2)
171 return push_inst(compiler, SELECT_OP(DADDU, ADDU) | S(src2) | TA(0) | D(dst), DR(dst));
172 return SLJIT_SUCCESS;
173
174 case SLJIT_MOV_U8:
175 case SLJIT_MOV_S8:
176 SLJIT_ASSERT(src1 == TMP_REG1 && !(flags & SRC2_IMM));
177 if ((flags & (REG_DEST | REG2_SOURCE)) == (REG_DEST | REG2_SOURCE)) {
178 if (op == SLJIT_MOV_S8) {
179 FAIL_IF(push_inst(compiler, DSLL32 | T(src2) | D(dst) | SH_IMM(24), DR(dst)));
180 return push_inst(compiler, DSRA32 | T(dst) | D(dst) | SH_IMM(24), DR(dst));
181 }
182 return push_inst(compiler, ANDI | S(src2) | T(dst) | IMM(0xff), DR(dst));
183 }
184 else {
185 SLJIT_ASSERT(dst == src2);
186 }
187 return SLJIT_SUCCESS;
188
189 case SLJIT_MOV_U16:
190 case SLJIT_MOV_S16:
191 SLJIT_ASSERT(src1 == TMP_REG1 && !(flags & SRC2_IMM));
192 if ((flags & (REG_DEST | REG2_SOURCE)) == (REG_DEST | REG2_SOURCE)) {
193 if (op == SLJIT_MOV_S16) {
194 FAIL_IF(push_inst(compiler, DSLL32 | T(src2) | D(dst) | SH_IMM(16), DR(dst)));
195 return push_inst(compiler, DSRA32 | T(dst) | D(dst) | SH_IMM(16), DR(dst));
196 }
197 return push_inst(compiler, ANDI | S(src2) | T(dst) | IMM(0xffff), DR(dst));
198 }
199 else {
200 SLJIT_ASSERT(dst == src2);
201 }
202 return SLJIT_SUCCESS;
203
204 case SLJIT_MOV_U32:
205 SLJIT_ASSERT(!(op & SLJIT_I32_OP));
206 FAIL_IF(push_inst(compiler, DSLL32 | T(src2) | D(dst) | SH_IMM(0), DR(dst)));
207 return push_inst(compiler, DSRL32 | T(dst) | D(dst) | SH_IMM(0), DR(dst));
208
209 case SLJIT_MOV_S32:
210 SLJIT_ASSERT(src1 == TMP_REG1 && !(flags & SRC2_IMM));
211 return push_inst(compiler, SLL | T(src2) | D(dst) | SH_IMM(0), DR(dst));
212
213 case SLJIT_NOT:
214 SLJIT_ASSERT(src1 == TMP_REG1 && !(flags & SRC2_IMM));
215 if (op & SLJIT_SET_Z)
216 FAIL_IF(push_inst(compiler, NOR | S(src2) | T(src2) | DA(EQUAL_FLAG), EQUAL_FLAG));
217 if (!(flags & UNUSED_DEST))
218 FAIL_IF(push_inst(compiler, NOR | S(src2) | T(src2) | D(dst), DR(dst)));
219 return SLJIT_SUCCESS;
220
221 case SLJIT_CLZ:
222 SLJIT_ASSERT(src1 == TMP_REG1 && !(flags & SRC2_IMM));
223 #if (defined SLJIT_MIPS_REV && SLJIT_MIPS_REV >= 1)
224 if (op & SLJIT_SET_Z)
225 FAIL_IF(push_inst(compiler, SELECT_OP(DCLZ, CLZ) | S(src2) | TA(EQUAL_FLAG) | DA(EQUAL_FLAG), EQUAL_FLAG));
226 if (!(flags & UNUSED_DEST))
227 FAIL_IF(push_inst(compiler, SELECT_OP(DCLZ, CLZ) | S(src2) | T(dst) | D(dst), DR(dst)));
228 #else /* SLJIT_MIPS_REV < 1 */
229 if (SLJIT_UNLIKELY(flags & UNUSED_DEST)) {
230 FAIL_IF(push_inst(compiler, SELECT_OP(DSRL32, SRL) | T(src2) | DA(EQUAL_FLAG) | SH_IMM(31), EQUAL_FLAG));
231 return push_inst(compiler, XORI | SA(EQUAL_FLAG) | TA(EQUAL_FLAG) | IMM(1), EQUAL_FLAG);
232 }
233 /* Nearly all instructions are unmovable in the following sequence. */
234 FAIL_IF(push_inst(compiler, SELECT_OP(DADDU, ADDU) | S(src2) | TA(0) | D(TMP_REG1), DR(TMP_REG1)));
235 /* Check zero. */
236 FAIL_IF(push_inst(compiler, BEQ | S(TMP_REG1) | TA(0) | IMM(5), UNMOVABLE_INS));
237 FAIL_IF(push_inst(compiler, ORI | SA(0) | T(dst) | IMM((op & SLJIT_I32_OP) ? 32 : 64), UNMOVABLE_INS));
238 FAIL_IF(push_inst(compiler, SELECT_OP(DADDIU, ADDIU) | SA(0) | T(dst) | IMM(-1), DR(dst)));
239 /* Loop for searching the highest bit. */
240 FAIL_IF(push_inst(compiler, SELECT_OP(DADDIU, ADDIU) | S(dst) | T(dst) | IMM(1), DR(dst)));
241 FAIL_IF(push_inst(compiler, BGEZ | S(TMP_REG1) | IMM(-2), UNMOVABLE_INS));
242 FAIL_IF(push_inst(compiler, SELECT_OP(DSLL, SLL) | T(TMP_REG1) | D(TMP_REG1) | SH_IMM(1), UNMOVABLE_INS));
243 #endif /* SLJIT_MIPS_REV >= 1 */
244 return SLJIT_SUCCESS;
245
246 case SLJIT_ADD:
247 is_overflow = GET_FLAG_TYPE(op) == SLJIT_OVERFLOW;
248 is_carry = GET_FLAG_TYPE(op) == GET_FLAG_TYPE(SLJIT_SET_CARRY);
249
250 if (flags & SRC2_IMM) {
251 if (is_overflow) {
252 if (src2 >= 0)
253 FAIL_IF(push_inst(compiler, OR | S(src1) | T(src1) | DA(EQUAL_FLAG), EQUAL_FLAG));
254 else
255 FAIL_IF(push_inst(compiler, NOR | S(src1) | T(src1) | DA(EQUAL_FLAG), EQUAL_FLAG));
256 }
257 else if (op & SLJIT_SET_Z)
258 FAIL_IF(push_inst(compiler, SELECT_OP(DADDIU, ADDIU) | S(src1) | TA(EQUAL_FLAG) | IMM(src2), EQUAL_FLAG));
259
260 if (is_overflow || is_carry) {
261 if (src2 >= 0)
262 FAIL_IF(push_inst(compiler, ORI | S(src1) | TA(OTHER_FLAG) | IMM(src2), OTHER_FLAG));
263 else {
264 FAIL_IF(push_inst(compiler, SELECT_OP(DADDIU, ADDIU) | SA(0) | TA(OTHER_FLAG) | IMM(src2), OTHER_FLAG));
265 FAIL_IF(push_inst(compiler, OR | S(src1) | TA(OTHER_FLAG) | DA(OTHER_FLAG), OTHER_FLAG));
266 }
267 }
268 /* dst may be the same as src1 or src2. */
269 if (!(flags & UNUSED_DEST) || (op & VARIABLE_FLAG_MASK))
270 FAIL_IF(push_inst(compiler, SELECT_OP(DADDIU, ADDIU) | S(src1) | T(dst) | IMM(src2), DR(dst)));
271 }
272 else {
273 if (is_overflow)
274 FAIL_IF(push_inst(compiler, XOR | S(src1) | T(src2) | DA(EQUAL_FLAG), EQUAL_FLAG));
275 else if (op & SLJIT_SET_Z)
276 FAIL_IF(push_inst(compiler, SELECT_OP(DADDU, ADDU) | S(src1) | T(src2) | DA(EQUAL_FLAG), EQUAL_FLAG));
277
278 if (is_overflow || is_carry)
279 FAIL_IF(push_inst(compiler, OR | S(src1) | T(src2) | DA(OTHER_FLAG), OTHER_FLAG));
280 /* dst may be the same as src1 or src2. */
281 if (!(flags & UNUSED_DEST) || (op & VARIABLE_FLAG_MASK))
282 FAIL_IF(push_inst(compiler, SELECT_OP(DADDU, ADDU) | S(src1) | T(src2) | D(dst), DR(dst)));
283 }
284
285 /* a + b >= a | b (otherwise, the carry should be set to 1). */
286 if (is_overflow || is_carry)
287 FAIL_IF(push_inst(compiler, SLTU | S(dst) | TA(OTHER_FLAG) | DA(OTHER_FLAG), OTHER_FLAG));
288 if (!is_overflow)
289 return SLJIT_SUCCESS;
290 FAIL_IF(push_inst(compiler, SELECT_OP(DSLL32, SLL) | TA(OTHER_FLAG) | D(TMP_REG1) | SH_IMM(31), DR(TMP_REG1)));
291 FAIL_IF(push_inst(compiler, XOR | S(TMP_REG1) | TA(EQUAL_FLAG) | DA(EQUAL_FLAG), EQUAL_FLAG));
292 FAIL_IF(push_inst(compiler, XOR | S(dst) | TA(EQUAL_FLAG) | DA(OTHER_FLAG), OTHER_FLAG));
293 if (op & SLJIT_SET_Z)
294 FAIL_IF(push_inst(compiler, SELECT_OP(DADDU, ADDU) | S(dst) | TA(0) | DA(EQUAL_FLAG), EQUAL_FLAG));
295 return push_inst(compiler, SELECT_OP(DSRL32, SRL) | TA(OTHER_FLAG) | DA(OTHER_FLAG) | SH_IMM(31), OTHER_FLAG);
296
297 case SLJIT_ADDC:
298 is_carry = GET_FLAG_TYPE(op) == GET_FLAG_TYPE(SLJIT_SET_CARRY);
299
300 if (flags & SRC2_IMM) {
301 if (is_carry) {
302 if (src2 >= 0)
303 FAIL_IF(push_inst(compiler, ORI | S(src1) | TA(EQUAL_FLAG) | IMM(src2), EQUAL_FLAG));
304 else {
305 FAIL_IF(push_inst(compiler, SELECT_OP(DADDIU, ADDIU) | SA(0) | TA(EQUAL_FLAG) | IMM(src2), EQUAL_FLAG));
306 FAIL_IF(push_inst(compiler, OR | S(src1) | TA(EQUAL_FLAG) | DA(EQUAL_FLAG), EQUAL_FLAG));
307 }
308 }
309 FAIL_IF(push_inst(compiler, SELECT_OP(DADDIU, ADDIU) | S(src1) | T(dst) | IMM(src2), DR(dst)));
310 } else {
311 if (is_carry)
312 FAIL_IF(push_inst(compiler, OR | S(src1) | T(src2) | DA(EQUAL_FLAG), EQUAL_FLAG));
313 /* dst may be the same as src1 or src2. */
314 FAIL_IF(push_inst(compiler, SELECT_OP(DADDU, ADDU) | S(src1) | T(src2) | D(dst), DR(dst)));
315 }
316 if (is_carry)
317 FAIL_IF(push_inst(compiler, SLTU | S(dst) | TA(EQUAL_FLAG) | DA(EQUAL_FLAG), EQUAL_FLAG));
318
319 FAIL_IF(push_inst(compiler, SELECT_OP(DADDU, ADDU) | S(dst) | TA(OTHER_FLAG) | D(dst), DR(dst)));
320 if (!is_carry)
321 return SLJIT_SUCCESS;
322
323 /* Set ULESS_FLAG (dst == 0) && (OTHER_FLAG == 1). */
324 FAIL_IF(push_inst(compiler, SLTU | S(dst) | TA(OTHER_FLAG) | DA(OTHER_FLAG), OTHER_FLAG));
325 /* Set carry flag. */
326 return push_inst(compiler, OR | SA(OTHER_FLAG) | TA(EQUAL_FLAG) | DA(OTHER_FLAG), OTHER_FLAG);
327
328 case SLJIT_SUB:
329 if ((flags & SRC2_IMM) && src2 == SIMM_MIN) {
330 FAIL_IF(push_inst(compiler, ADDIU | SA(0) | T(TMP_REG2) | IMM(src2), DR(TMP_REG2)));
331 src2 = TMP_REG2;
332 flags &= ~SRC2_IMM;
333 }
334
335 is_handled = 0;
336
337 if (flags & SRC2_IMM) {
338 if (GET_FLAG_TYPE(op) == SLJIT_LESS || GET_FLAG_TYPE(op) == SLJIT_GREATER_EQUAL) {
339 FAIL_IF(push_inst(compiler, SLTIU | S(src1) | TA(OTHER_FLAG) | IMM(src2), OTHER_FLAG));
340 is_handled = 1;
341 }
342 else if (GET_FLAG_TYPE(op) == SLJIT_SIG_LESS || GET_FLAG_TYPE(op) == SLJIT_SIG_GREATER_EQUAL) {
343 FAIL_IF(push_inst(compiler, SLTI | S(src1) | TA(OTHER_FLAG) | IMM(src2), OTHER_FLAG));
344 is_handled = 1;
345 }
346 }
347
348 if (!is_handled && GET_FLAG_TYPE(op) >= SLJIT_LESS && GET_FLAG_TYPE(op) <= SLJIT_SIG_LESS_EQUAL) {
349 is_handled = 1;
350
351 if (flags & SRC2_IMM) {
352 FAIL_IF(push_inst(compiler, ADDIU | SA(0) | T(TMP_REG2) | IMM(src2), DR(TMP_REG2)));
353 src2 = TMP_REG2;
354 flags &= ~SRC2_IMM;
355 }
356
357 if (GET_FLAG_TYPE(op) == SLJIT_LESS || GET_FLAG_TYPE(op) == SLJIT_GREATER_EQUAL) {
358 FAIL_IF(push_inst(compiler, SLTU | S(src1) | T(src2) | DA(OTHER_FLAG), OTHER_FLAG));
359 }
360 else if (GET_FLAG_TYPE(op) == SLJIT_GREATER || GET_FLAG_TYPE(op) == SLJIT_LESS_EQUAL)
361 {
362 FAIL_IF(push_inst(compiler, SLTU | S(src2) | T(src1) | DA(OTHER_FLAG), OTHER_FLAG));
363 }
364 else if (GET_FLAG_TYPE(op) == SLJIT_SIG_LESS || GET_FLAG_TYPE(op) == SLJIT_SIG_GREATER_EQUAL) {
365 FAIL_IF(push_inst(compiler, SLT | S(src1) | T(src2) | DA(OTHER_FLAG), OTHER_FLAG));
366 }
367 else if (GET_FLAG_TYPE(op) == SLJIT_SIG_GREATER || GET_FLAG_TYPE(op) == SLJIT_SIG_LESS_EQUAL)
368 {
369 FAIL_IF(push_inst(compiler, SLT | S(src2) | T(src1) | DA(OTHER_FLAG), OTHER_FLAG));
370 }
371 }
372
373 if (is_handled) {
374 if (flags & SRC2_IMM) {
375 if (op & SLJIT_SET_Z)
376 FAIL_IF(push_inst(compiler, SELECT_OP(DADDIU, ADDIU) | S(src1) | TA(EQUAL_FLAG) | IMM(-src2), EQUAL_FLAG));
377 if (!(flags & UNUSED_DEST))
378 return push_inst(compiler, SELECT_OP(DADDIU, ADDIU) | S(src1) | T(dst) | IMM(-src2), DR(dst));
379 }
380 else {
381 if (op & SLJIT_SET_Z)
382 FAIL_IF(push_inst(compiler, SELECT_OP(DSUBU, SUBU) | S(src1) | T(src2) | DA(EQUAL_FLAG), EQUAL_FLAG));
383 if (!(flags & UNUSED_DEST))
384 return push_inst(compiler, SELECT_OP(DSUBU, SUBU) | S(src1) | T(src2) | D(dst), DR(dst));
385 }
386 return SLJIT_SUCCESS;
387 }
388
389 is_overflow = GET_FLAG_TYPE(op) == SLJIT_OVERFLOW;
390 is_carry = GET_FLAG_TYPE(op) == GET_FLAG_TYPE(SLJIT_SET_CARRY);
391
392 if (flags & SRC2_IMM) {
393 if (is_overflow) {
394 if (src2 >= 0)
395 FAIL_IF(push_inst(compiler, OR | S(src1) | T(src1) | DA(EQUAL_FLAG), EQUAL_FLAG));
396 else
397 FAIL_IF(push_inst(compiler, NOR | S(src1) | T(src1) | DA(EQUAL_FLAG), EQUAL_FLAG));
398 }
399 else if (op & SLJIT_SET_Z)
400 FAIL_IF(push_inst(compiler, SELECT_OP(DADDIU, ADDIU) | S(src1) | TA(EQUAL_FLAG) | IMM(-src2), EQUAL_FLAG));
401
402 if (is_overflow || is_carry)
403 FAIL_IF(push_inst(compiler, SLTIU | S(src1) | TA(OTHER_FLAG) | IMM(src2), OTHER_FLAG));
404 /* dst may be the same as src1 or src2. */
405 if (!(flags & UNUSED_DEST) || (op & VARIABLE_FLAG_MASK))
406 FAIL_IF(push_inst(compiler, SELECT_OP(DADDIU, ADDIU) | S(src1) | T(dst) | IMM(-src2), DR(dst)));
407 }
408 else {
409 if (is_overflow)
410 FAIL_IF(push_inst(compiler, XOR | S(src1) | T(src2) | DA(EQUAL_FLAG), EQUAL_FLAG));
411 else if (op & SLJIT_SET_Z)
412 FAIL_IF(push_inst(compiler, SELECT_OP(DSUBU, SUBU) | S(src1) | T(src2) | DA(EQUAL_FLAG), EQUAL_FLAG));
413
414 if (is_overflow || is_carry)
415 FAIL_IF(push_inst(compiler, SLTU | S(src1) | T(src2) | DA(OTHER_FLAG), OTHER_FLAG));
416 /* dst may be the same as src1 or src2. */
417 if (!(flags & UNUSED_DEST) || (op & VARIABLE_FLAG_MASK))
418 FAIL_IF(push_inst(compiler, SELECT_OP(DSUBU, SUBU) | S(src1) | T(src2) | D(dst), DR(dst)));
419 }
420
421 if (!is_overflow)
422 return SLJIT_SUCCESS;
423 FAIL_IF(push_inst(compiler, SELECT_OP(DSLL32, SLL) | TA(OTHER_FLAG) | D(TMP_REG1) | SH_IMM(31), DR(TMP_REG1)));
424 FAIL_IF(push_inst(compiler, XOR | S(TMP_REG1) | TA(EQUAL_FLAG) | DA(EQUAL_FLAG), EQUAL_FLAG));
425 FAIL_IF(push_inst(compiler, XOR | S(dst) | TA(EQUAL_FLAG) | DA(OTHER_FLAG), OTHER_FLAG));
426 if (op & SLJIT_SET_Z)
427 FAIL_IF(push_inst(compiler, SELECT_OP(DADDU, ADDU) | S(dst) | TA(0) | DA(EQUAL_FLAG), EQUAL_FLAG));
428 return push_inst(compiler, SELECT_OP(DSRL32, SRL) | TA(OTHER_FLAG) | DA(OTHER_FLAG) | SH_IMM(31), OTHER_FLAG);
429
430 case SLJIT_SUBC:
431 if ((flags & SRC2_IMM) && src2 == SIMM_MIN) {
432 FAIL_IF(push_inst(compiler, ADDIU | SA(0) | T(TMP_REG2) | IMM(src2), DR(TMP_REG2)));
433 src2 = TMP_REG2;
434 flags &= ~SRC2_IMM;
435 }
436
437 is_carry = GET_FLAG_TYPE(op) == GET_FLAG_TYPE(SLJIT_SET_CARRY);
438
439 if (flags & SRC2_IMM) {
440 if (is_carry)
441 FAIL_IF(push_inst(compiler, SLTIU | S(src1) | TA(EQUAL_FLAG) | IMM(src2), EQUAL_FLAG));
442 /* dst may be the same as src1 or src2. */
443 FAIL_IF(push_inst(compiler, SELECT_OP(DADDIU, ADDIU) | S(src1) | T(dst) | IMM(-src2), DR(dst)));
444 }
445 else {
446 if (is_carry)
447 FAIL_IF(push_inst(compiler, SLTU | S(src1) | T(src2) | DA(EQUAL_FLAG), EQUAL_FLAG));
448 /* dst may be the same as src1 or src2. */
449 FAIL_IF(push_inst(compiler, SELECT_OP(DSUBU, SUBU) | S(src1) | T(src2) | D(dst), DR(dst)));
450 }
451
452 if (is_carry)
453 FAIL_IF(push_inst(compiler, SLTU | S(dst) | TA(OTHER_FLAG) | D(TMP_REG1), DR(TMP_REG1)));
454
455 FAIL_IF(push_inst(compiler, SELECT_OP(DSUBU, SUBU) | S(dst) | TA(OTHER_FLAG) | D(dst), DR(dst)));
456 return (is_carry) ? push_inst(compiler, OR | SA(EQUAL_FLAG) | T(TMP_REG1) | DA(OTHER_FLAG), OTHER_FLAG) : SLJIT_SUCCESS;
457
458 case SLJIT_MUL:
459 SLJIT_ASSERT(!(flags & SRC2_IMM));
460
461 if (GET_FLAG_TYPE(op) != SLJIT_OVERFLOW) {
462 #if (defined SLJIT_MIPS_REV && SLJIT_MIPS_REV >= 6)
463 return push_inst(compiler, SELECT_OP(DMUL, MUL) | S(src1) | T(src2) | D(dst), DR(dst));
464 #elif (defined SLJIT_MIPS_REV && SLJIT_MIPS_REV >= 1)
465 if (op & SLJIT_I32_OP)
466 return push_inst(compiler, MUL | S(src1) | T(src2) | D(dst), DR(dst));
467 FAIL_IF(push_inst(compiler, DMULT | S(src1) | T(src2), MOVABLE_INS));
468 return push_inst(compiler, MFLO | D(dst), DR(dst));
469 #else /* SLJIT_MIPS_REV < 1 */
470 FAIL_IF(push_inst(compiler, SELECT_OP(DMULT, MULT) | S(src1) | T(src2), MOVABLE_INS));
471 return push_inst(compiler, MFLO | D(dst), DR(dst));
472 #endif /* SLJIT_MIPS_REV >= 6 */
473 }
474
475 #if (defined SLJIT_MIPS_REV && SLJIT_MIPS_REV >= 6)
476 FAIL_IF(push_inst(compiler, SELECT_OP(DMUL, MUL) | S(src1) | T(src2) | D(dst), DR(dst)));
477 FAIL_IF(push_inst(compiler, SELECT_OP(DMUH, MUH) | S(src1) | T(src2) | DA(EQUAL_FLAG), EQUAL_FLAG));
478 #else /* SLJIT_MIPS_REV < 6 */
479 FAIL_IF(push_inst(compiler, SELECT_OP(DMULT, MULT) | S(src1) | T(src2), MOVABLE_INS));
480 FAIL_IF(push_inst(compiler, MFHI | DA(EQUAL_FLAG), EQUAL_FLAG));
481 FAIL_IF(push_inst(compiler, MFLO | D(dst), DR(dst)));
482 #endif /* SLJIT_MIPS_REV >= 6 */
483 FAIL_IF(push_inst(compiler, SELECT_OP(DSRA32, SRA) | T(dst) | DA(OTHER_FLAG) | SH_IMM(31), OTHER_FLAG));
484 return push_inst(compiler, SELECT_OP(DSUBU, SUBU) | SA(EQUAL_FLAG) | TA(OTHER_FLAG) | DA(OTHER_FLAG), OTHER_FLAG);
485
486 case SLJIT_AND:
487 EMIT_LOGICAL(ANDI, AND);
488 return SLJIT_SUCCESS;
489
490 case SLJIT_OR:
491 EMIT_LOGICAL(ORI, OR);
492 return SLJIT_SUCCESS;
493
494 case SLJIT_XOR:
495 EMIT_LOGICAL(XORI, XOR);
496 return SLJIT_SUCCESS;
497
498 case SLJIT_SHL:
499 EMIT_SHIFT(DSLL, DSLL32, SLL, DSLLV, SLLV);
500 return SLJIT_SUCCESS;
501
502 case SLJIT_LSHR:
503 EMIT_SHIFT(DSRL, DSRL32, SRL, DSRLV, SRLV);
504 return SLJIT_SUCCESS;
505
506 case SLJIT_ASHR:
507 EMIT_SHIFT(DSRA, DSRA32, SRA, DSRAV, SRAV);
508 return SLJIT_SUCCESS;
509 }
510
511 SLJIT_UNREACHABLE();
512 return SLJIT_SUCCESS;
513 }
514
emit_const(struct sljit_compiler * compiler,sljit_s32 dst,sljit_sw init_value)515 static SLJIT_INLINE sljit_s32 emit_const(struct sljit_compiler *compiler, sljit_s32 dst, sljit_sw init_value)
516 {
517 FAIL_IF(push_inst(compiler, LUI | T(dst) | IMM(init_value >> 48), DR(dst)));
518 FAIL_IF(push_inst(compiler, ORI | S(dst) | T(dst) | IMM(init_value >> 32), DR(dst)));
519 FAIL_IF(push_inst(compiler, DSLL | T(dst) | D(dst) | SH_IMM(16), DR(dst)));
520 FAIL_IF(push_inst(compiler, ORI | S(dst) | T(dst) | IMM(init_value >> 16), DR(dst)));
521 FAIL_IF(push_inst(compiler, DSLL | T(dst) | D(dst) | SH_IMM(16), DR(dst)));
522 return push_inst(compiler, ORI | S(dst) | T(dst) | IMM(init_value), DR(dst));
523 }
524
sljit_set_jump_addr(sljit_uw addr,sljit_uw new_target,sljit_sw executable_offset)525 SLJIT_API_FUNC_ATTRIBUTE void sljit_set_jump_addr(sljit_uw addr, sljit_uw new_target, sljit_sw executable_offset)
526 {
527 sljit_ins *inst = (sljit_ins *)addr;
528 SLJIT_UNUSED_ARG(executable_offset);
529
530 SLJIT_UPDATE_WX_FLAGS(inst, inst + 6, 0);
531 inst[0] = (inst[0] & 0xffff0000) | ((new_target >> 48) & 0xffff);
532 inst[1] = (inst[1] & 0xffff0000) | ((new_target >> 32) & 0xffff);
533 inst[3] = (inst[3] & 0xffff0000) | ((new_target >> 16) & 0xffff);
534 inst[5] = (inst[5] & 0xffff0000) | (new_target & 0xffff);
535 SLJIT_UPDATE_WX_FLAGS(inst, inst + 6, 1);
536 inst = (sljit_ins *)SLJIT_ADD_EXEC_OFFSET(inst, executable_offset);
537 SLJIT_CACHE_FLUSH(inst, inst + 6);
538 }
539
sljit_set_const(sljit_uw addr,sljit_sw new_constant,sljit_sw executable_offset)540 SLJIT_API_FUNC_ATTRIBUTE void sljit_set_const(sljit_uw addr, sljit_sw new_constant, sljit_sw executable_offset)
541 {
542 sljit_set_jump_addr(addr, new_constant, executable_offset);
543 }
544
call_with_args(struct sljit_compiler * compiler,sljit_s32 arg_types,sljit_ins * ins_ptr)545 static sljit_s32 call_with_args(struct sljit_compiler *compiler, sljit_s32 arg_types, sljit_ins *ins_ptr)
546 {
547 sljit_s32 arg_count = 0;
548 sljit_s32 word_arg_count = 0;
549 sljit_s32 float_arg_count = 0;
550 sljit_s32 types = 0;
551 sljit_ins prev_ins = NOP;
552 sljit_ins ins = NOP;
553
554 SLJIT_ASSERT(reg_map[TMP_REG1] == 4 && freg_map[TMP_FREG1] == 12);
555
556 arg_types >>= SLJIT_DEF_SHIFT;
557
558 while (arg_types) {
559 types = (types << SLJIT_DEF_SHIFT) | (arg_types & SLJIT_DEF_MASK);
560
561 switch (arg_types & SLJIT_DEF_MASK) {
562 case SLJIT_ARG_TYPE_F32:
563 case SLJIT_ARG_TYPE_F64:
564 arg_count++;
565 float_arg_count++;
566 break;
567 default:
568 arg_count++;
569 word_arg_count++;
570 break;
571 }
572
573 arg_types >>= SLJIT_DEF_SHIFT;
574 }
575
576 while (types) {
577 switch (types & SLJIT_DEF_MASK) {
578 case SLJIT_ARG_TYPE_F32:
579 if (arg_count != float_arg_count)
580 ins = MOV_S | FMT_S | FS(float_arg_count) | FD(arg_count);
581 else if (arg_count == 1)
582 ins = MOV_S | FMT_S | FS(SLJIT_FR0) | FD(TMP_FREG1);
583 arg_count--;
584 float_arg_count--;
585 break;
586 case SLJIT_ARG_TYPE_F64:
587 if (arg_count != float_arg_count)
588 ins = MOV_S | FMT_D | FS(float_arg_count) | FD(arg_count);
589 else if (arg_count == 1)
590 ins = MOV_S | FMT_D | FS(SLJIT_FR0) | FD(TMP_FREG1);
591 arg_count--;
592 float_arg_count--;
593 break;
594 default:
595 if (arg_count != word_arg_count)
596 ins = DADDU | S(word_arg_count) | TA(0) | D(arg_count);
597 else if (arg_count == 1)
598 ins = DADDU | S(SLJIT_R0) | TA(0) | DA(4);
599 arg_count--;
600 word_arg_count--;
601 break;
602 }
603
604 if (ins != NOP) {
605 if (prev_ins != NOP)
606 FAIL_IF(push_inst(compiler, prev_ins, MOVABLE_INS));
607 prev_ins = ins;
608 ins = NOP;
609 }
610
611 types >>= SLJIT_DEF_SHIFT;
612 }
613
614 *ins_ptr = prev_ins;
615
616 return SLJIT_SUCCESS;
617 }
618
sljit_emit_call(struct sljit_compiler * compiler,sljit_s32 type,sljit_s32 arg_types)619 SLJIT_API_FUNC_ATTRIBUTE struct sljit_jump* sljit_emit_call(struct sljit_compiler *compiler, sljit_s32 type,
620 sljit_s32 arg_types)
621 {
622 struct sljit_jump *jump;
623 sljit_ins ins;
624
625 CHECK_ERROR_PTR();
626 CHECK_PTR(check_sljit_emit_call(compiler, type, arg_types));
627
628 jump = (struct sljit_jump*)ensure_abuf(compiler, sizeof(struct sljit_jump));
629 PTR_FAIL_IF(!jump);
630 set_jump(jump, compiler, type & SLJIT_REWRITABLE_JUMP);
631 type &= 0xff;
632
633 PTR_FAIL_IF(call_with_args(compiler, arg_types, &ins));
634
635 SLJIT_ASSERT(DR(PIC_ADDR_REG) == 25 && PIC_ADDR_REG == TMP_REG2);
636
637 PTR_FAIL_IF(emit_const(compiler, PIC_ADDR_REG, 0));
638
639 jump->flags |= IS_JAL | IS_CALL;
640 PTR_FAIL_IF(push_inst(compiler, JALR | S(PIC_ADDR_REG) | DA(RETURN_ADDR_REG), UNMOVABLE_INS));
641 jump->addr = compiler->size;
642 PTR_FAIL_IF(push_inst(compiler, ins, UNMOVABLE_INS));
643
644 return jump;
645 }
646
sljit_emit_icall(struct sljit_compiler * compiler,sljit_s32 type,sljit_s32 arg_types,sljit_s32 src,sljit_sw srcw)647 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_icall(struct sljit_compiler *compiler, sljit_s32 type,
648 sljit_s32 arg_types,
649 sljit_s32 src, sljit_sw srcw)
650 {
651 sljit_ins ins;
652
653 CHECK_ERROR();
654 CHECK(check_sljit_emit_icall(compiler, type, arg_types, src, srcw));
655
656 SLJIT_ASSERT(DR(PIC_ADDR_REG) == 25 && PIC_ADDR_REG == TMP_REG2);
657
658 if (src & SLJIT_IMM)
659 FAIL_IF(load_immediate(compiler, DR(PIC_ADDR_REG), srcw));
660 else if (FAST_IS_REG(src))
661 FAIL_IF(push_inst(compiler, DADDU | S(src) | TA(0) | D(PIC_ADDR_REG), DR(PIC_ADDR_REG)));
662 else if (src & SLJIT_MEM) {
663 ADJUST_LOCAL_OFFSET(src, srcw);
664 FAIL_IF(emit_op_mem(compiler, WORD_DATA | LOAD_DATA, DR(PIC_ADDR_REG), src, srcw));
665 }
666
667 FAIL_IF(call_with_args(compiler, arg_types, &ins));
668
669 /* Register input. */
670 FAIL_IF(push_inst(compiler, JALR | S(PIC_ADDR_REG) | DA(RETURN_ADDR_REG), UNMOVABLE_INS));
671 return push_inst(compiler, ins, UNMOVABLE_INS);
672 }
673
