1 /*
2  *    Stack-less Just-In-Time compiler
3  *
4  *    Copyright 2009-2012 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_si dst_ar,sljit_sw imm)29 static sljit_si load_immediate(struct sljit_compiler *compiler, sljit_si 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_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_v) \
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_v | S(src2) | T(src1) | DA(EQUAL_FLAG), EQUAL_FLAG)); \
65 		if (CHECK_FLAGS(SLJIT_SET_E)) \
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_si op,sljit_si flags,sljit_si dst,sljit_si src1,sljit_sw src2)69 static SLJIT_INLINE sljit_si emit_single_op(struct sljit_compiler *compiler, sljit_si op, sljit_si flags,
70 	sljit_si dst, sljit_si src1, sljit_sw src2)
71 {
72 	switch (GET_OPCODE(op)) {
73 	case SLJIT_MOV:
74 	case SLJIT_MOV_UI:
75 	case SLJIT_MOV_SI:
76 	case SLJIT_MOV_P:
77 		SLJIT_ASSERT(src1 == TMP_REG1 && !(flags & SRC2_IMM));
78 		if (dst != src2)
79 			return push_inst(compiler, ADDU | S(src2) | TA(0) | D(dst), DR(dst));
80 		return SLJIT_SUCCESS;
81 
82 	case SLJIT_MOV_UB:
83 	case SLJIT_MOV_SB:
84 		SLJIT_ASSERT(src1 == TMP_REG1 && !(flags & SRC2_IMM));
85 		if ((flags & (REG_DEST | REG2_SOURCE)) == (REG_DEST | REG2_SOURCE)) {
86 			if (op == SLJIT_MOV_SB) {
87 #if (defined SLJIT_MIPS_R1 && SLJIT_MIPS_R1)
88 				return push_inst(compiler, SEB | T(src2) | D(dst), DR(dst));
89 #else
90 				FAIL_IF(push_inst(compiler, SLL | T(src2) | D(dst) | SH_IMM(24), DR(dst)));
91 				return push_inst(compiler, SRA | T(dst) | D(dst) | SH_IMM(24), DR(dst));
92 #endif
93 			}
94 			return push_inst(compiler, ANDI | S(src2) | T(dst) | IMM(0xff), DR(dst));
95 		}
96 		else if (dst != src2)
97 			SLJIT_ASSERT_STOP();
98 		return SLJIT_SUCCESS;
99 
100 	case SLJIT_MOV_UH:
101 	case SLJIT_MOV_SH:
102 		SLJIT_ASSERT(src1 == TMP_REG1 && !(flags & SRC2_IMM));
103 		if ((flags & (REG_DEST | REG2_SOURCE)) == (REG_DEST | REG2_SOURCE)) {
104 			if (op == SLJIT_MOV_SH) {
105 #if (defined SLJIT_MIPS_R1 && SLJIT_MIPS_R1)
106 				return push_inst(compiler, SEH | T(src2) | D(dst), DR(dst));
107 #else
108 				FAIL_IF(push_inst(compiler, SLL | T(src2) | D(dst) | SH_IMM(16), DR(dst)));
109 				return push_inst(compiler, SRA | T(dst) | D(dst) | SH_IMM(16), DR(dst));
110 #endif
111 			}
112 			return push_inst(compiler, ANDI | S(src2) | T(dst) | IMM(0xffff), DR(dst));
113 		}
114 		else if (dst != src2)
115 			SLJIT_ASSERT_STOP();
116 		return SLJIT_SUCCESS;
117 
118 	case SLJIT_NOT:
119 		SLJIT_ASSERT(src1 == TMP_REG1 && !(flags & SRC2_IMM));
120 		if (op & SLJIT_SET_E)
121 			FAIL_IF(push_inst(compiler, NOR | S(src2) | T(src2) | DA(EQUAL_FLAG), EQUAL_FLAG));
122 		if (CHECK_FLAGS(SLJIT_SET_E))
123 			FAIL_IF(push_inst(compiler, NOR | S(src2) | T(src2) | D(dst), DR(dst)));
124 		return SLJIT_SUCCESS;
125 
126 	case SLJIT_CLZ:
127 		SLJIT_ASSERT(src1 == TMP_REG1 && !(flags & SRC2_IMM));
128 #if (defined SLJIT_MIPS_R1 && SLJIT_MIPS_R1)
129 		if (op & SLJIT_SET_E)
130 			FAIL_IF(push_inst(compiler, CLZ | S(src2) | TA(EQUAL_FLAG) | DA(EQUAL_FLAG), EQUAL_FLAG));
131 		if (CHECK_FLAGS(SLJIT_SET_E))
132 			FAIL_IF(push_inst(compiler, CLZ | S(src2) | T(dst) | D(dst), DR(dst)));
133 #else
134 		if (SLJIT_UNLIKELY(flags & UNUSED_DEST)) {
135 			FAIL_IF(push_inst(compiler, SRL | T(src2) | DA(EQUAL_FLAG) | SH_IMM(31), EQUAL_FLAG));
136 			return push_inst(compiler, XORI | SA(EQUAL_FLAG) | TA(EQUAL_FLAG) | IMM(1), EQUAL_FLAG);
137 		}
138 		/* Nearly all instructions are unmovable in the following sequence. */
139 		FAIL_IF(push_inst(compiler, ADDU | S(src2) | TA(0) | D(TMP_REG1), DR(TMP_REG1)));
140 		/* Check zero. */
141 		FAIL_IF(push_inst(compiler, BEQ | S(TMP_REG1) | TA(0) | IMM(5), UNMOVABLE_INS));
142 		FAIL_IF(push_inst(compiler, ORI | SA(0) | T(dst) | IMM(32), UNMOVABLE_INS));
143 		FAIL_IF(push_inst(compiler, ADDIU | SA(0) | T(dst) | IMM(-1), DR(dst)));
144 		/* Loop for searching the highest bit. */
145 		FAIL_IF(push_inst(compiler, ADDIU | S(dst) | T(dst) | IMM(1), DR(dst)));
146 		FAIL_IF(push_inst(compiler, BGEZ | S(TMP_REG1) | IMM(-2), UNMOVABLE_INS));
147 		FAIL_IF(push_inst(compiler, SLL | T(TMP_REG1) | D(TMP_REG1) | SH_IMM(1), UNMOVABLE_INS));
148 		if (op & SLJIT_SET_E)
149 			return push_inst(compiler, ADDU | S(dst) | TA(0) | DA(EQUAL_FLAG), EQUAL_FLAG);
150 #endif
151 		return SLJIT_SUCCESS;
152 
153 	case SLJIT_ADD:
154 		if (flags & SRC2_IMM) {
155 			if (op & SLJIT_SET_O) {
156 				if (src2 >= 0)
157 					FAIL_IF(push_inst(compiler, OR | S(src1) | T(src1) | DA(OVERFLOW_FLAG), OVERFLOW_FLAG));
158 				else
159 					FAIL_IF(push_inst(compiler, NOR | S(src1) | T(src1) | DA(OVERFLOW_FLAG), OVERFLOW_FLAG));
160 			}
161 			if (op & SLJIT_SET_E)
162 				FAIL_IF(push_inst(compiler, ADDIU | S(src1) | TA(EQUAL_FLAG) | IMM(src2), EQUAL_FLAG));
163 			if (op & (SLJIT_SET_C | SLJIT_SET_O)) {
164 				if (src2 >= 0)
165 					FAIL_IF(push_inst(compiler, ORI | S(src1) | TA(ULESS_FLAG) | IMM(src2), ULESS_FLAG));
166 				else {
167 					FAIL_IF(push_inst(compiler, ADDIU | SA(0) | TA(ULESS_FLAG) | IMM(src2), ULESS_FLAG));
168 					FAIL_IF(push_inst(compiler, OR | S(src1) | TA(ULESS_FLAG) | DA(ULESS_FLAG), ULESS_FLAG));
169 				}
170 			}
171 			/* dst may be the same as src1 or src2. */
172 			if (CHECK_FLAGS(SLJIT_SET_E))
173 				FAIL_IF(push_inst(compiler, ADDIU | S(src1) | T(dst) | IMM(src2), DR(dst)));
174 		}
175 		else {
176 			if (op & SLJIT_SET_O)
177 				FAIL_IF(push_inst(compiler, XOR | S(src1) | T(src2) | DA(OVERFLOW_FLAG), OVERFLOW_FLAG));
178 			if (op & SLJIT_SET_E)
179 				FAIL_IF(push_inst(compiler, ADDU | S(src1) | T(src2) | DA(EQUAL_FLAG), EQUAL_FLAG));
180 			if (op & (SLJIT_SET_C | SLJIT_SET_O))
181 				FAIL_IF(push_inst(compiler, OR | S(src1) | T(src2) | DA(ULESS_FLAG), ULESS_FLAG));
182 			/* dst may be the same as src1 or src2. */
183 			if (CHECK_FLAGS(SLJIT_SET_E))
184 				FAIL_IF(push_inst(compiler, ADDU | S(src1) | T(src2) | D(dst), DR(dst)));
185 		}
186 
187 		/* a + b >= a | b (otherwise, the carry should be set to 1). */
188 		if (op & (SLJIT_SET_C | SLJIT_SET_O))
189 			FAIL_IF(push_inst(compiler, SLTU | S(dst) | TA(ULESS_FLAG) | DA(ULESS_FLAG), ULESS_FLAG));
190 		if (!(op & SLJIT_SET_O))
191 			return SLJIT_SUCCESS;
192 		FAIL_IF(push_inst(compiler, SLL | TA(ULESS_FLAG) | D(TMP_REG1) | SH_IMM(31), DR(TMP_REG1)));
193 		FAIL_IF(push_inst(compiler, XOR | S(TMP_REG1) | TA(OVERFLOW_FLAG) | DA(OVERFLOW_FLAG), OVERFLOW_FLAG));
194 		FAIL_IF(push_inst(compiler, XOR | S(dst) | TA(OVERFLOW_FLAG) | DA(OVERFLOW_FLAG), OVERFLOW_FLAG));
195 		return push_inst(compiler, SLL | TA(OVERFLOW_FLAG) | DA(OVERFLOW_FLAG) | SH_IMM(31), OVERFLOW_FLAG);
196 
197 	case SLJIT_ADDC:
198 		if (flags & SRC2_IMM) {
199 			if (op & SLJIT_SET_C) {
200 				if (src2 >= 0)
201 					FAIL_IF(push_inst(compiler, ORI | S(src1) | TA(OVERFLOW_FLAG) | IMM(src2), OVERFLOW_FLAG));
202 				else {
203 					FAIL_IF(push_inst(compiler, ADDIU | SA(0) | TA(OVERFLOW_FLAG) | IMM(src2), OVERFLOW_FLAG));
204 					FAIL_IF(push_inst(compiler, OR | S(src1) | TA(OVERFLOW_FLAG) | DA(OVERFLOW_FLAG), OVERFLOW_FLAG));
205 				}
206 			}
207 			FAIL_IF(push_inst(compiler, ADDIU | S(src1) | T(dst) | IMM(src2), DR(dst)));
208 		} else {
209 			if (op & SLJIT_SET_C)
210 				FAIL_IF(push_inst(compiler, OR | S(src1) | T(src2) | DA(OVERFLOW_FLAG), OVERFLOW_FLAG));
211 			/* dst may be the same as src1 or src2. */
212 			FAIL_IF(push_inst(compiler, ADDU | S(src1) | T(src2) | D(dst), DR(dst)));
213 		}
214 		if (op & SLJIT_SET_C)
215 			FAIL_IF(push_inst(compiler, SLTU | S(dst) | TA(OVERFLOW_FLAG) | DA(OVERFLOW_FLAG), OVERFLOW_FLAG));
216 
217 		FAIL_IF(push_inst(compiler, ADDU | S(dst) | TA(ULESS_FLAG) | D(dst), DR(dst)));
218 		if (!(op & SLJIT_SET_C))
219 			return SLJIT_SUCCESS;
220 
221 		/* Set ULESS_FLAG (dst == 0) && (ULESS_FLAG == 1). */
222 		FAIL_IF(push_inst(compiler, SLTU | S(dst) | TA(ULESS_FLAG) | DA(ULESS_FLAG), ULESS_FLAG));
223 		/* Set carry flag. */
224 		return push_inst(compiler, OR | SA(ULESS_FLAG) | TA(OVERFLOW_FLAG) | DA(ULESS_FLAG), ULESS_FLAG);
225 
226 	case SLJIT_SUB:
227 		if ((flags & SRC2_IMM) && ((op & (SLJIT_SET_U | SLJIT_SET_S)) || src2 == SIMM_MIN)) {
228 			FAIL_IF(push_inst(compiler, ADDIU | SA(0) | T(TMP_REG2) | IMM(src2), DR(TMP_REG2)));
229 			src2 = TMP_REG2;
230 			flags &= ~SRC2_IMM;
231 		}
232 
233 		if (flags & SRC2_IMM) {
234 			if (op & SLJIT_SET_O) {
235 				if (src2 >= 0)
236 					FAIL_IF(push_inst(compiler, OR | S(src1) | T(src1) | DA(OVERFLOW_FLAG), OVERFLOW_FLAG));
237 				else
238 					FAIL_IF(push_inst(compiler, NOR | S(src1) | T(src1) | DA(OVERFLOW_FLAG), OVERFLOW_FLAG));
239 			}
240 			if (op & SLJIT_SET_E)
241 				FAIL_IF(push_inst(compiler, ADDIU | S(src1) | TA(EQUAL_FLAG) | IMM(-src2), EQUAL_FLAG));
242 			if (op & (SLJIT_SET_C | SLJIT_SET_O))
243 				FAIL_IF(push_inst(compiler, SLTIU | S(src1) | TA(ULESS_FLAG) | IMM(src2), ULESS_FLAG));
244 			/* dst may be the same as src1 or src2. */
245 			if (CHECK_FLAGS(SLJIT_SET_E))
246 				FAIL_IF(push_inst(compiler, ADDIU | S(src1) | T(dst) | IMM(-src2), DR(dst)));
247 		}
248 		else {
249 			if (op & SLJIT_SET_O)
250 				FAIL_IF(push_inst(compiler, XOR | S(src1) | T(src2) | DA(OVERFLOW_FLAG), OVERFLOW_FLAG));
251 			if (op & SLJIT_SET_E)
252 				FAIL_IF(push_inst(compiler, SUBU | S(src1) | T(src2) | DA(EQUAL_FLAG), EQUAL_FLAG));
253 			if (op & (SLJIT_SET_U | SLJIT_SET_C | SLJIT_SET_O))
254 				FAIL_IF(push_inst(compiler, SLTU | S(src1) | T(src2) | DA(ULESS_FLAG), ULESS_FLAG));
255 			if (op & SLJIT_SET_U)
256 				FAIL_IF(push_inst(compiler, SLTU | S(src2) | T(src1) | DA(UGREATER_FLAG), UGREATER_FLAG));
257 			if (op & SLJIT_SET_S) {
258 				FAIL_IF(push_inst(compiler, SLT | S(src1) | T(src2) | DA(LESS_FLAG), LESS_FLAG));
259 				FAIL_IF(push_inst(compiler, SLT | S(src2) | T(src1) | DA(GREATER_FLAG), GREATER_FLAG));
260 			}
261 			/* dst may be the same as src1 or src2. */
262 			if (CHECK_FLAGS(SLJIT_SET_E | SLJIT_SET_U | SLJIT_SET_S | SLJIT_SET_C))
263 				FAIL_IF(push_inst(compiler, SUBU | S(src1) | T(src2) | D(dst), DR(dst)));
264 		}
265 
266 		if (!(op & SLJIT_SET_O))
267 			return SLJIT_SUCCESS;
268 		FAIL_IF(push_inst(compiler, SLL | TA(ULESS_FLAG) | D(TMP_REG1) | SH_IMM(31), DR(TMP_REG1)));
269 		FAIL_IF(push_inst(compiler, XOR | S(TMP_REG1) | TA(OVERFLOW_FLAG) | DA(OVERFLOW_FLAG), OVERFLOW_FLAG));
270 		FAIL_IF(push_inst(compiler, XOR | S(dst) | TA(OVERFLOW_FLAG) | DA(OVERFLOW_FLAG), OVERFLOW_FLAG));
271 		return push_inst(compiler, SRL | TA(OVERFLOW_FLAG) | DA(OVERFLOW_FLAG) | SH_IMM(31), OVERFLOW_FLAG);
272 
273 	case SLJIT_SUBC:
274 		if ((flags & SRC2_IMM) && src2 == SIMM_MIN) {
275 			FAIL_IF(push_inst(compiler, ADDIU | SA(0) | T(TMP_REG2) | IMM(src2), DR(TMP_REG2)));
276 			src2 = TMP_REG2;
277 			flags &= ~SRC2_IMM;
278 		}
279 
280 		if (flags & SRC2_IMM) {
281 			if (op & SLJIT_SET_C)
282 				FAIL_IF(push_inst(compiler, SLTIU | S(src1) | TA(OVERFLOW_FLAG) | IMM(src2), OVERFLOW_FLAG));
283 			/* dst may be the same as src1 or src2. */
284 			FAIL_IF(push_inst(compiler, ADDIU | S(src1) | T(dst) | IMM(-src2), DR(dst)));
285 		}
286 		else {
287 			if (op & SLJIT_SET_C)
288 				FAIL_IF(push_inst(compiler, SLTU | S(src1) | T(src2) | DA(OVERFLOW_FLAG), OVERFLOW_FLAG));
289 			/* dst may be the same as src1 or src2. */
290 			FAIL_IF(push_inst(compiler, SUBU | S(src1) | T(src2) | D(dst), DR(dst)));
291 		}
292 
293 		if (op & SLJIT_SET_C)
294 			FAIL_IF(push_inst(compiler, SLTU | S(dst) | TA(ULESS_FLAG) | DA(LESS_FLAG), LESS_FLAG));
295 
296 		FAIL_IF(push_inst(compiler, SUBU | S(dst) | TA(ULESS_FLAG) | D(dst), DR(dst)));
297 		return (op & SLJIT_SET_C) ? push_inst(compiler, OR | SA(OVERFLOW_FLAG) | TA(LESS_FLAG) | DA(ULESS_FLAG), ULESS_FLAG) : SLJIT_SUCCESS;
298 
299 	case SLJIT_MUL:
300 		SLJIT_ASSERT(!(flags & SRC2_IMM));
301 		if (!(op & SLJIT_SET_O)) {
302 #if (defined SLJIT_MIPS_R1 && SLJIT_MIPS_R1)
303 			return push_inst(compiler, MUL | S(src1) | T(src2) | D(dst), DR(dst));
304 #else
305 			FAIL_IF(push_inst(compiler, MULT | S(src1) | T(src2), MOVABLE_INS));
306 			return push_inst(compiler, MFLO | D(dst), DR(dst));
307 #endif
308 		}
309 		FAIL_IF(push_inst(compiler, MULT | S(src1) | T(src2), MOVABLE_INS));
310 		FAIL_IF(push_inst(compiler, MFHI | DA(ULESS_FLAG), ULESS_FLAG));
311 		FAIL_IF(push_inst(compiler, MFLO | D(dst), DR(dst)));
312 		FAIL_IF(push_inst(compiler, SRA | T(dst) | DA(UGREATER_FLAG) | SH_IMM(31), UGREATER_FLAG));
313 		return push_inst(compiler, SUBU | SA(ULESS_FLAG) | TA(UGREATER_FLAG) | DA(OVERFLOW_FLAG), OVERFLOW_FLAG);
314 
315 	case SLJIT_AND:
316 		EMIT_LOGICAL(ANDI, AND);
317 		return SLJIT_SUCCESS;
318 
319 	case SLJIT_OR:
320 		EMIT_LOGICAL(ORI, OR);
321 		return SLJIT_SUCCESS;
322 
323 	case SLJIT_XOR:
324 		EMIT_LOGICAL(XORI, XOR);
325 		return SLJIT_SUCCESS;
326 
327 	case SLJIT_SHL:
328 		EMIT_SHIFT(SLL, SLLV);
329 		return SLJIT_SUCCESS;
330 
331 	case SLJIT_LSHR:
332 		EMIT_SHIFT(SRL, SRLV);
333 		return SLJIT_SUCCESS;
334 
335 	case SLJIT_ASHR:
336 		EMIT_SHIFT(SRA, SRAV);
337 		return SLJIT_SUCCESS;
338 	}
339 
340 	SLJIT_ASSERT_STOP();
341 	return SLJIT_SUCCESS;
342 }
343 
emit_const(struct sljit_compiler * compiler,sljit_si dst,sljit_sw init_value)344 static SLJIT_INLINE sljit_si emit_const(struct sljit_compiler *compiler, sljit_si dst, sljit_sw init_value)
345 {
346 	FAIL_IF(push_inst(compiler, LUI | T(dst) | IMM(init_value >> 16), DR(dst)));
347 	return push_inst(compiler, ORI | S(dst) | T(dst) | IMM(init_value), DR(dst));
348 }
349 
sljit_set_jump_addr(sljit_uw addr,sljit_uw new_addr)350 SLJIT_API_FUNC_ATTRIBUTE void sljit_set_jump_addr(sljit_uw addr, sljit_uw new_addr)
351 {
352 	sljit_ins *inst = (sljit_ins*)addr;
353 
354 	inst[0] = (inst[0] & 0xffff0000) | ((new_addr >> 16) & 0xffff);
355 	inst[1] = (inst[1] & 0xffff0000) | (new_addr & 0xffff);
356 	SLJIT_CACHE_FLUSH(inst, inst + 2);
357 }
358 
sljit_set_const(sljit_uw addr,sljit_sw new_constant)359 SLJIT_API_FUNC_ATTRIBUTE void sljit_set_const(sljit_uw addr, sljit_sw new_constant)
360 {
361 	sljit_ins *inst = (sljit_ins*)addr;
362 
363 	inst[0] = (inst[0] & 0xffff0000) | ((new_constant >> 16) & 0xffff);
364 	inst[1] = (inst[1] & 0xffff0000) | (new_constant & 0xffff);
365 	SLJIT_CACHE_FLUSH(inst, inst + 2);
366 }
367