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: SLJIT_API_FUNC_ATTRIBUTE SLJIT_CONST char* sljit_get_platform_name()
28: {
29: return "ARM-Thumb2" SLJIT_CPUINFO;
30: }
31:
32: /* Last register + 1. */
33: #define TMP_REG1 (SLJIT_NO_REGISTERS + 1)
34: #define TMP_REG2 (SLJIT_NO_REGISTERS + 2)
35: #define TMP_REG3 (SLJIT_NO_REGISTERS + 3)
36: #define TMP_PC (SLJIT_NO_REGISTERS + 4)
37:
38: #define TMP_FREG1 (SLJIT_FLOAT_REG4 + 1)
39: #define TMP_FREG2 (SLJIT_FLOAT_REG4 + 2)
40:
41: /* See sljit_emit_enter and sljit_emit_op0 if you want to change them. */
42: static SLJIT_CONST sljit_ub reg_map[SLJIT_NO_REGISTERS + 5] = {
43: 0, 0, 1, 2, 12, 5, 6, 7, 8, 10, 11, 13, 3, 4, 14, 15
44: };
45:
46: #define COPY_BITS(src, from, to, bits) \
47: ((from >= to ? (src >> (from - to)) : (src << (to - from))) & (((1 << bits) - 1) << to))
48:
49: /* Thumb16 encodings. */
50: #define RD3(rd) (reg_map[rd])
51: #define RN3(rn) (reg_map[rn] << 3)
52: #define RM3(rm) (reg_map[rm] << 6)
53: #define RDN3(rdn) (reg_map[rdn] << 8)
54: #define IMM3(imm) (imm << 6)
55: #define IMM8(imm) (imm)
56:
57: /* Thumb16 helpers. */
58: #define SET_REGS44(rd, rn) \
59: ((reg_map[rn] << 3) | (reg_map[rd] & 0x7) | ((reg_map[rd] & 0x8) << 4))
60: #define IS_2_LO_REGS(reg1, reg2) \
61: (reg_map[reg1] <= 7 && reg_map[reg2] <= 7)
62: #define IS_3_LO_REGS(reg1, reg2, reg3) \
63: (reg_map[reg1] <= 7 && reg_map[reg2] <= 7 && reg_map[reg3] <= 7)
64:
65: /* Thumb32 encodings. */
66: #define RD4(rd) (reg_map[rd] << 8)
67: #define RN4(rn) (reg_map[rn] << 16)
68: #define RM4(rm) (reg_map[rm])
69: #define RT4(rt) (reg_map[rt] << 12)
70: #define DD4(dd) ((dd) << 12)
71: #define DN4(dn) ((dn) << 16)
72: #define DM4(dm) (dm)
73: #define IMM5(imm) \
74: (COPY_BITS(imm, 2, 12, 3) | ((imm & 0x3) << 6))
75: #define IMM12(imm) \
76: (COPY_BITS(imm, 11, 26, 1) | COPY_BITS(imm, 8, 12, 3) | (imm & 0xff))
77:
78: typedef sljit_ui sljit_ins;
79:
80: /* --------------------------------------------------------------------- */
81: /* Instrucion forms */
82: /* --------------------------------------------------------------------- */
83:
84: /* dot '.' changed to _
85: I immediate form (possibly followed by number of immediate bits). */
86: #define ADCI 0xf1400000
87: #define ADCS 0x4140
88: #define ADC_W 0xeb400000
89: #define ADD 0x4400
90: #define ADDS 0x1800
91: #define ADDSI3 0x1c00
92: #define ADDSI8 0x3000
93: #define ADD_W 0xeb000000
94: #define ADDWI 0xf2000000
95: #define ADD_SP 0xb000
96: #define ADD_W 0xeb000000
97: #define ADD_WI 0xf1000000
98: #define ANDI 0xf0000000
99: #define ANDS 0x4000
100: #define AND_W 0xea000000
101: #define ASRS 0x4100
102: #define ASRSI 0x1000
103: #define ASR_W 0xfa40f000
104: #define ASR_WI 0xea4f0020
105: #define BICI 0xf0200000
106: #define BKPT 0xbe00
107: #define BLX 0x4780
108: #define BX 0x4700
109: #define CLZ 0xfab0f080
110: #define CMPI 0x2800
111: #define CMP_W 0xebb00f00
112: #define EORI 0xf0800000
113: #define EORS 0x4040
114: #define EOR_W 0xea800000
115: #define IT 0xbf00
116: #define LSLS 0x4080
117: #define LSLSI 0x0000
118: #define LSL_W 0xfa00f000
119: #define LSL_WI 0xea4f0000
120: #define LSRS 0x40c0
121: #define LSRSI 0x0800
122: #define LSR_W 0xfa20f000
123: #define LSR_WI 0xea4f0010
124: #define MOV 0x4600
125: #define MOVS 0x0000
126: #define MOVSI 0x2000
127: #define MOVT 0xf2c00000
128: #define MOVW 0xf2400000
129: #define MOV_W 0xea4f0000
130: #define MOV_WI 0xf04f0000
131: #define MUL 0xfb00f000
132: #define MVNS 0x43c0
133: #define MVN_W 0xea6f0000
134: #define MVN_WI 0xf06f0000
135: #define NOP 0xbf00
136: #define ORNI 0xf0600000
137: #define ORRI 0xf0400000
138: #define ORRS 0x4300
139: #define ORR_W 0xea400000
140: #define POP 0xbd00
141: #define POP_W 0xe8bd0000
142: #define PUSH 0xb500
143: #define PUSH_W 0xe92d0000
144: #define RSB_WI 0xf1c00000
145: #define RSBSI 0x4240
146: #define SBCI 0xf1600000
147: #define SBCS 0x4180
148: #define SBC_W 0xeb600000
149: #define SMULL 0xfb800000
150: #define STR_SP 0x9000
151: #define SUBS 0x1a00
152: #define SUBSI3 0x1e00
153: #define SUBSI8 0x3800
154: #define SUB_W 0xeba00000
155: #define SUBWI 0xf2a00000
156: #define SUB_SP 0xb080
157: #define SUB_WI 0xf1a00000
158: #define SXTB 0xb240
159: #define SXTB_W 0xfa4ff080
160: #define SXTH 0xb200
161: #define SXTH_W 0xfa0ff080
162: #define TST 0x4200
163: #define UMULL 0xfba00000
164: #define UXTB 0xb2c0
165: #define UXTB_W 0xfa5ff080
166: #define UXTH 0xb280
167: #define UXTH_W 0xfa1ff080
168: #define VABS_F64 0xeeb00bc0
169: #define VADD_F64 0xee300b00
170: #define VCMP_F64 0xeeb40b40
171: #define VDIV_F64 0xee800b00
172: #define VMOV_F64 0xeeb00b40
173: #define VMRS 0xeef1fa10
174: #define VMUL_F64 0xee200b00
175: #define VNEG_F64 0xeeb10b40
176: #define VSTR 0xed000b00
177: #define VSUB_F64 0xee300b40
178:
179: static int push_inst16(struct sljit_compiler *compiler, sljit_ins inst)
180: {
181: sljit_uh *ptr;
182: SLJIT_ASSERT(!(inst & 0xffff0000));
183:
184: ptr = (sljit_uh*)ensure_buf(compiler, sizeof(sljit_uh));
185: FAIL_IF(!ptr);
186: *ptr = inst;
187: compiler->size++;
188: return SLJIT_SUCCESS;
189: }
190:
191: static int push_inst32(struct sljit_compiler *compiler, sljit_ins inst)
192: {
193: sljit_uh *ptr = (sljit_uh*)ensure_buf(compiler, sizeof(sljit_ins));
194: FAIL_IF(!ptr);
195: *ptr++ = inst >> 16;
196: *ptr = inst;
197: compiler->size += 2;
198: return SLJIT_SUCCESS;
199: }
200:
201: static SLJIT_INLINE int emit_imm32_const(struct sljit_compiler *compiler, int dst, sljit_uw imm)
202: {
203: FAIL_IF(push_inst32(compiler, MOVW | RD4(dst) |
204: COPY_BITS(imm, 12, 16, 4) | COPY_BITS(imm, 11, 26, 1) | COPY_BITS(imm, 8, 12, 3) | (imm & 0xff)));
205: return push_inst32(compiler, MOVT | RD4(dst) |
206: COPY_BITS(imm, 12 + 16, 16, 4) | COPY_BITS(imm, 11 + 16, 26, 1) | COPY_BITS(imm, 8 + 16, 12, 3) | ((imm & 0xff0000) >> 16));
207: }
208:
209: static SLJIT_INLINE void modify_imm32_const(sljit_uh* inst, sljit_uw new_imm)
210: {
211: int dst = inst[1] & 0x0f00;
212: SLJIT_ASSERT(((inst[0] & 0xfbf0) == (MOVW >> 16)) && ((inst[2] & 0xfbf0) == (MOVT >> 16)) && dst == (inst[3] & 0x0f00));
213: inst[0] = (MOVW >> 16) | COPY_BITS(new_imm, 12, 0, 4) | COPY_BITS(new_imm, 11, 10, 1);
214: inst[1] = dst | COPY_BITS(new_imm, 8, 12, 3) | (new_imm & 0xff);
215: inst[2] = (MOVT >> 16) | COPY_BITS(new_imm, 12 + 16, 0, 4) | COPY_BITS(new_imm, 11 + 16, 10, 1);
216: inst[3] = dst | COPY_BITS(new_imm, 8 + 16, 12, 3) | ((new_imm & 0xff0000) >> 16);
217: }
218:
219: static SLJIT_INLINE int detect_jump_type(struct sljit_jump *jump, sljit_uh *code_ptr, sljit_uh *code)
220: {
221: sljit_w diff;
222:
223: if (jump->flags & SLJIT_REWRITABLE_JUMP)
224: return 0;
225:
226: if (jump->flags & JUMP_ADDR) {
227: /* Branch to ARM code is not optimized yet. */
228: if (!(jump->u.target & 0x1))
229: return 0;
230: diff = ((sljit_w)jump->u.target - (sljit_w)(code_ptr + 2)) >> 1;
231: }
232: else {
233: SLJIT_ASSERT(jump->flags & JUMP_LABEL);
234: diff = ((sljit_w)(code + jump->u.label->size) - (sljit_w)(code_ptr + 2)) >> 1;
235: }
236:
237: if (jump->flags & IS_CONDITIONAL) {
238: SLJIT_ASSERT(!(jump->flags & IS_BL));
239: if (diff <= 127 && diff >= -128) {
240: jump->flags |= B_TYPE1;
241: return 5;
242: }
243: if (diff <= 524287 && diff >= -524288) {
244: jump->flags |= B_TYPE2;
245: return 4;
246: }
247: /* +1 comes from the prefix IT instruction. */
248: diff--;
249: if (diff <= 8388607 && diff >= -8388608) {
250: jump->flags |= B_TYPE3;
251: return 3;
252: }
253: }
254: else if (jump->flags & IS_BL) {
255: if (diff <= 8388607 && diff >= -8388608) {
256: jump->flags |= BL_TYPE6;
257: return 3;
258: }
259: }
260: else {
261: if (diff <= 1023 && diff >= -1024) {
262: jump->flags |= B_TYPE4;
263: return 4;
264: }
265: if (diff <= 8388607 && diff >= -8388608) {
266: jump->flags |= B_TYPE5;
267: return 3;
268: }
269: }
270:
271: return 0;
272: }
273:
274: static SLJIT_INLINE void inline_set_jump_addr(sljit_uw addr, sljit_uw new_addr, int flush)
275: {
276: sljit_uh* inst = (sljit_uh*)addr;
277: modify_imm32_const(inst, new_addr);
278: if (flush) {
279: SLJIT_CACHE_FLUSH(inst, inst + 3);
280: }
281: }
282:
283: static SLJIT_INLINE void set_jump_instruction(struct sljit_jump *jump)
284: {
285: int type = (jump->flags >> 4) & 0xf;
286: sljit_w diff;
287: sljit_uh *jump_inst;
288: int s, j1, j2;
289:
290: if (SLJIT_UNLIKELY(type == 0)) {
291: inline_set_jump_addr(jump->addr, (jump->flags & JUMP_LABEL) ? jump->u.label->addr : jump->u.target, 0);
292: return;
293: }
294:
295: if (jump->flags & JUMP_ADDR) {
296: SLJIT_ASSERT(jump->u.target & 0x1);
297: diff = ((sljit_w)jump->u.target - (sljit_w)(jump->addr + 4)) >> 1;
298: }
299: else
300: diff = ((sljit_w)(jump->u.label->addr) - (sljit_w)(jump->addr + 4)) >> 1;
301: jump_inst = (sljit_uh*)jump->addr;
302:
303: switch (type) {
304: case 1:
305: /* Encoding T1 of 'B' instruction */
306: SLJIT_ASSERT(diff <= 127 && diff >= -128 && (jump->flags & IS_CONDITIONAL));
307: jump_inst[0] = 0xd000 | (jump->flags & 0xf00) | (diff & 0xff);
308: return;
309: case 2:
310: /* Encoding T3 of 'B' instruction */
311: SLJIT_ASSERT(diff <= 524287 && diff >= -524288 && (jump->flags & IS_CONDITIONAL));
312: jump_inst[0] = 0xf000 | COPY_BITS(jump->flags, 8, 6, 4) | COPY_BITS(diff, 11, 0, 6) | COPY_BITS(diff, 19, 10, 1);
313: jump_inst[1] = 0x8000 | COPY_BITS(diff, 17, 13, 1) | COPY_BITS(diff, 18, 11, 1) | (diff & 0x7ff);
314: return;
315: case 3:
316: SLJIT_ASSERT(jump->flags & IS_CONDITIONAL);
317: *jump_inst++ = IT | ((jump->flags >> 4) & 0xf0) | 0x8;
318: diff--;
319: type = 5;
320: break;
321: case 4:
322: /* Encoding T2 of 'B' instruction */
323: SLJIT_ASSERT(diff <= 1023 && diff >= -1024 && !(jump->flags & IS_CONDITIONAL));
324: jump_inst[0] = 0xe000 | (diff & 0x7ff);
325: return;
326: }
327:
328: SLJIT_ASSERT(diff <= 8388607 && diff >= -8388608);
329:
330: /* Really complex instruction form for branches. */
331: s = (diff >> 23) & 0x1;
332: j1 = (~(diff >> 21) ^ s) & 0x1;
333: j2 = (~(diff >> 22) ^ s) & 0x1;
334: jump_inst[0] = 0xf000 | (s << 10) | COPY_BITS(diff, 11, 0, 10);
335: jump_inst[1] = (j1 << 13) | (j2 << 11) | (diff & 0x7ff);
336:
337: /* The others have a common form. */
338: if (type == 5) /* Encoding T4 of 'B' instruction */
339: jump_inst[1] |= 0x9000;
340: else if (type == 6) /* Encoding T1 of 'BL' instruction */
341: jump_inst[1] |= 0xd000;
342: else
343: SLJIT_ASSERT_STOP();
344: }
345:
346: SLJIT_API_FUNC_ATTRIBUTE void* sljit_generate_code(struct sljit_compiler *compiler)
347: {
348: struct sljit_memory_fragment *buf;
349: sljit_uh *code;
350: sljit_uh *code_ptr;
351: sljit_uh *buf_ptr;
352: sljit_uh *buf_end;
353: sljit_uw half_count;
354:
355: struct sljit_label *label;
356: struct sljit_jump *jump;
357: struct sljit_const *const_;
358:
359: CHECK_ERROR_PTR();
360: check_sljit_generate_code(compiler);
361: reverse_buf(compiler);
362:
363: code = (sljit_uh*)SLJIT_MALLOC_EXEC(compiler->size * sizeof(sljit_uh));
364: PTR_FAIL_WITH_EXEC_IF(code);
365: buf = compiler->buf;
366:
367: code_ptr = code;
368: half_count = 0;
369: label = compiler->labels;
370: jump = compiler->jumps;
371: const_ = compiler->consts;
372:
373: do {
374: buf_ptr = (sljit_uh*)buf->memory;
375: buf_end = buf_ptr + (buf->used_size >> 1);
376: do {
377: *code_ptr = *buf_ptr++;
378: /* These structures are ordered by their address. */
379: SLJIT_ASSERT(!label || label->size >= half_count);
380: SLJIT_ASSERT(!jump || jump->addr >= half_count);
381: SLJIT_ASSERT(!const_ || const_->addr >= half_count);
382: if (label && label->size == half_count) {
383: label->addr = ((sljit_uw)code_ptr) | 0x1;
384: label->size = code_ptr - code;
385: label = label->next;
386: }
387: if (jump && jump->addr == half_count) {
388: jump->addr = (sljit_uw)code_ptr - ((jump->flags & IS_CONDITIONAL) ? 10 : 8);
389: code_ptr -= detect_jump_type(jump, code_ptr, code);
390: jump = jump->next;
391: }
392: if (const_ && const_->addr == half_count) {
393: const_->addr = (sljit_uw)code_ptr;
394: const_ = const_->next;
395: }
396: code_ptr ++;
397: half_count ++;
398: } while (buf_ptr < buf_end);
399:
400: buf = buf->next;
401: } while (buf);
402:
403: if (label && label->size == half_count) {
404: label->addr = ((sljit_uw)code_ptr) | 0x1;
405: label->size = code_ptr - code;
406: label = label->next;
407: }
408:
409: SLJIT_ASSERT(!label);
410: SLJIT_ASSERT(!jump);
411: SLJIT_ASSERT(!const_);
412: SLJIT_ASSERT(code_ptr - code <= (int)compiler->size);
413:
414: jump = compiler->jumps;
415: while (jump) {
416: set_jump_instruction(jump);
417: jump = jump->next;
418: }
419:
420: SLJIT_CACHE_FLUSH(code, code_ptr);
421: compiler->error = SLJIT_ERR_COMPILED;
422: compiler->executable_size = compiler->size * sizeof(sljit_uh);
423: /* Set thumb mode flag. */
424: return (void*)((sljit_uw)code | 0x1);
425: }
426:
427: #define INVALID_IMM 0x80000000
428: static sljit_uw get_imm(sljit_uw imm)
429: {
430: /* Thumb immediate form. */
431: int counter;
432:
433: if (imm <= 0xff)
434: return imm;
435:
436: if ((imm & 0xffff) == (imm >> 16)) {
437: /* Some special cases. */
438: if (!(imm & 0xff00))
439: return (1 << 12) | (imm & 0xff);
440: if (!(imm & 0xff))
441: return (2 << 12) | ((imm >> 8) & 0xff);
442: if ((imm & 0xff00) == ((imm & 0xff) << 8))
443: return (3 << 12) | (imm & 0xff);
444: }
445:
446: /* Assembly optimization: count leading zeroes? */
447: counter = 8;
448: if (!(imm & 0xffff0000)) {
449: counter += 16;
450: imm <<= 16;
451: }
452: if (!(imm & 0xff000000)) {
453: counter += 8;
454: imm <<= 8;
455: }
456: if (!(imm & 0xf0000000)) {
457: counter += 4;
458: imm <<= 4;
459: }
460: if (!(imm & 0xc0000000)) {
461: counter += 2;
462: imm <<= 2;
463: }
464: if (!(imm & 0x80000000)) {
465: counter += 1;
466: imm <<= 1;
467: }
468: /* Since imm >= 128, this must be true. */
469: SLJIT_ASSERT(counter <= 31);
470:
471: if (imm & 0x00ffffff)
472: return INVALID_IMM; /* Cannot be encoded. */
473:
474: return ((imm >> 24) & 0x7f) | COPY_BITS(counter, 4, 26, 1) | COPY_BITS(counter, 1, 12, 3) | COPY_BITS(counter, 0, 7, 1);
475: }
476:
477: static int load_immediate(struct sljit_compiler *compiler, int dst, sljit_uw imm)
478: {
479: sljit_uw tmp;
480:
481: if (imm >= 0x10000) {
482: tmp = get_imm(imm);
483: if (tmp != INVALID_IMM)
484: return push_inst32(compiler, MOV_WI | RD4(dst) | tmp);
485: tmp = get_imm(~imm);
486: if (tmp != INVALID_IMM)
487: return push_inst32(compiler, MVN_WI | RD4(dst) | tmp);
488: }
489:
490: /* set low 16 bits, set hi 16 bits to 0. */
491: FAIL_IF(push_inst32(compiler, MOVW | RD4(dst) |
492: COPY_BITS(imm, 12, 16, 4) | COPY_BITS(imm, 11, 26, 1) | COPY_BITS(imm, 8, 12, 3) | (imm & 0xff)));
493:
494: /* set hi 16 bit if needed. */
495: if (imm >= 0x10000)
496: return push_inst32(compiler, MOVT | RD4(dst) |
497: COPY_BITS(imm, 12 + 16, 16, 4) | COPY_BITS(imm, 11 + 16, 26, 1) | COPY_BITS(imm, 8 + 16, 12, 3) | ((imm & 0xff0000) >> 16));
498: return SLJIT_SUCCESS;
499: }
500:
501: #define ARG1_IMM 0x0010000
502: #define ARG2_IMM 0x0020000
503: #define KEEP_FLAGS 0x0040000
504: #define SET_MULOV 0x0080000
505: /* SET_FLAGS must be 0x100000 as it is also the value of S bit (can be used for optimization). */
506: #define SET_FLAGS 0x0100000
507: #define UNUSED_RETURN 0x0200000
508: #define SLOW_DEST 0x0400000
509: #define SLOW_SRC1 0x0800000
510: #define SLOW_SRC2 0x1000000
511:
512: static int emit_op_imm(struct sljit_compiler *compiler, int flags, int dst, sljit_uw arg1, sljit_uw arg2)
513: {
514: /* dst must be register, TMP_REG1
515: arg1 must be register, TMP_REG1, imm
516: arg2 must be register, TMP_REG2, imm */
517: int reg;
518: sljit_uw imm, negated_imm;
519:
520: if (SLJIT_UNLIKELY((flags & (ARG1_IMM | ARG2_IMM)) == (ARG1_IMM | ARG2_IMM))) {
521: /* Both are immediates. */
522: flags &= ~ARG1_IMM;
523: FAIL_IF(load_immediate(compiler, TMP_REG1, arg1));
524: arg1 = TMP_REG1;
525: }
526:
527: if (flags & (ARG1_IMM | ARG2_IMM)) {
528: reg = (flags & ARG2_IMM) ? arg1 : arg2;
529: imm = (flags & ARG2_IMM) ? arg2 : arg1;
530:
531: switch (flags & 0xffff) {
532: case SLJIT_MOV:
533: SLJIT_ASSERT(!(flags & SET_FLAGS) && (flags & ARG2_IMM) && arg1 == TMP_REG1);
534: return load_immediate(compiler, dst, imm);
535: case SLJIT_NOT:
536: if (!(flags & SET_FLAGS))
537: return load_immediate(compiler, dst, ~imm);
538: /* Since the flags should be set, we just fallback to the register mode.
539: Although I could do some clever things here, "NOT IMM" does not worth the efforts. */
540: break;
541: case SLJIT_CLZ:
542: /* No form with immediate operand. */
543: break;
544: case SLJIT_ADD:
545: negated_imm = (sljit_uw)-(sljit_w)imm;
546: if (!(flags & KEEP_FLAGS) && IS_2_LO_REGS(reg, dst)) {
547: if (imm <= 0x7)
548: return push_inst16(compiler, ADDSI3 | IMM3(imm) | RD3(dst) | RN3(reg));
549: if (negated_imm <= 0x7)
550: return push_inst16(compiler, SUBSI3 | IMM3(negated_imm) | RD3(dst) | RN3(reg));
551: if (reg == dst) {
552: if (imm <= 0xff)
553: return push_inst16(compiler, ADDSI8 | IMM8(imm) | RDN3(dst));
554: if (negated_imm <= 0xff)
555: return push_inst16(compiler, SUBSI8 | IMM8(negated_imm) | RDN3(dst));
556: }
557: }
558: if (!(flags & SET_FLAGS)) {
559: if (imm <= 0xfff)
560: return push_inst32(compiler, ADDWI | RD4(dst) | RN4(reg) | IMM12(imm));
561: if (negated_imm <= 0xfff)
562: return push_inst32(compiler, SUBWI | RD4(dst) | RN4(reg) | IMM12(negated_imm));
563: }
564: imm = get_imm(imm);
565: if (imm != INVALID_IMM)
566: return push_inst32(compiler, ADD_WI | (flags & SET_FLAGS) | RD4(dst) | RN4(reg) | imm);
567: break;
568: case SLJIT_ADDC:
569: imm = get_imm(imm);
570: if (imm != INVALID_IMM)
571: return push_inst32(compiler, ADCI | (flags & SET_FLAGS) | RD4(dst) | RN4(reg) | imm);
572: break;
573: case SLJIT_SUB:
574: if (flags & ARG2_IMM) {
575: negated_imm = (sljit_uw)-(sljit_w)imm;
576: if (!(flags & KEEP_FLAGS) && IS_2_LO_REGS(reg, dst)) {
577: if (imm <= 0x7)
578: return push_inst16(compiler, SUBSI3 | IMM3(imm) | RD3(dst) | RN3(reg));
579: if (negated_imm <= 0x7)
580: return push_inst16(compiler, ADDSI3 | IMM3(negated_imm) | RD3(dst) | RN3(reg));
581: if (reg == dst) {
582: if (imm <= 0xff)
583: return push_inst16(compiler, SUBSI8 | IMM8(imm) | RDN3(dst));
584: if (negated_imm <= 0xff)
585: return push_inst16(compiler, ADDSI8 | IMM8(negated_imm) | RDN3(dst));
586: }
587: if (imm <= 0xff && (flags & UNUSED_RETURN))
588: return push_inst16(compiler, CMPI | IMM8(imm) | RDN3(reg));
589: }
590: if (!(flags & SET_FLAGS)) {
591: if (imm <= 0xfff)
592: return push_inst32(compiler, SUBWI | RD4(dst) | RN4(reg) | IMM12(imm));
593: if (negated_imm <= 0xfff)
594: return push_inst32(compiler, ADDWI | RD4(dst) | RN4(reg) | IMM12(negated_imm));
595: }
596: imm = get_imm(imm);
597: if (imm != INVALID_IMM)
598: return push_inst32(compiler, SUB_WI | (flags & SET_FLAGS) | RD4(dst) | RN4(reg) | imm);
599: }
600: else {
601: if (!(flags & KEEP_FLAGS) && imm == 0 && IS_2_LO_REGS(reg, dst))
602: return push_inst16(compiler, RSBSI | RD3(dst) | RN3(reg));
603: imm = get_imm(imm);
604: if (imm != INVALID_IMM)
605: return push_inst32(compiler, RSB_WI | (flags & SET_FLAGS) | RD4(dst) | RN4(reg) | imm);
606: }
607: break;
608: case SLJIT_SUBC:
609: if (flags & ARG2_IMM) {
610: imm = get_imm(imm);
611: if (imm != INVALID_IMM)
612: return push_inst32(compiler, SBCI | (flags & SET_FLAGS) | RD4(dst) | RN4(reg) | imm);
613: }
614: break;
615: case SLJIT_MUL:
616: /* No form with immediate operand. */
617: break;
618: case SLJIT_AND:
619: imm = get_imm(imm);
620: if (imm != INVALID_IMM)
621: return push_inst32(compiler, ANDI | (flags & SET_FLAGS) | RD4(dst) | RN4(reg) | imm);
622: imm = get_imm(~((flags & ARG2_IMM) ? arg2 : arg1));
623: if (imm != INVALID_IMM)
624: return push_inst32(compiler, BICI | (flags & SET_FLAGS) | RD4(dst) | RN4(reg) | imm);
625: break;
626: case SLJIT_OR:
627: imm = get_imm(imm);
628: if (imm != INVALID_IMM)
629: return push_inst32(compiler, ORRI | (flags & SET_FLAGS) | RD4(dst) | RN4(reg) | imm);
630: imm = get_imm(~((flags & ARG2_IMM) ? arg2 : arg1));
631: if (imm != INVALID_IMM)
632: return push_inst32(compiler, ORNI | (flags & SET_FLAGS) | RD4(dst) | RN4(reg) | imm);
633: break;
634: case SLJIT_XOR:
635: imm = get_imm(imm);
636: if (imm != INVALID_IMM)
637: return push_inst32(compiler, EORI | (flags & SET_FLAGS) | RD4(dst) | RN4(reg) | imm);
638: break;
639: case SLJIT_SHL:
640: if (flags & ARG2_IMM) {
641: imm &= 0x1f;
642: if (imm == 0) {
643: if (!(flags & SET_FLAGS))
644: return push_inst16(compiler, MOV | SET_REGS44(dst, reg));
645: if (IS_2_LO_REGS(dst, reg))
646: return push_inst16(compiler, MOVS | RD3(dst) | RN3(reg));
647: return push_inst32(compiler, MOV_W | SET_FLAGS | RD4(dst) | RM4(reg));
648: }
649: if (!(flags & KEEP_FLAGS) && IS_2_LO_REGS(dst, reg))
650: return push_inst16(compiler, LSLSI | RD3(dst) | RN3(reg) | (imm << 6));
651: return push_inst32(compiler, LSL_WI | (flags & SET_FLAGS) | RD4(dst) | RM4(reg) | IMM5(imm));
652: }
653: break;
654: case SLJIT_LSHR:
655: if (flags & ARG2_IMM) {
656: imm &= 0x1f;
657: if (imm == 0) {
658: if (!(flags & SET_FLAGS))
659: return push_inst16(compiler, MOV | SET_REGS44(dst, reg));
660: if (IS_2_LO_REGS(dst, reg))
661: return push_inst16(compiler, MOVS | RD3(dst) | RN3(reg));
662: return push_inst32(compiler, MOV_W | SET_FLAGS | RD4(dst) | RM4(reg));
663: }
664: if (!(flags & KEEP_FLAGS) && IS_2_LO_REGS(dst, reg))
665: return push_inst16(compiler, LSRSI | RD3(dst) | RN3(reg) | (imm << 6));
666: return push_inst32(compiler, LSR_WI | (flags & SET_FLAGS) | RD4(dst) | RM4(reg) | IMM5(imm));
667: }
668: break;
669: case SLJIT_ASHR:
670: if (flags & ARG2_IMM) {
671: imm &= 0x1f;
672: if (imm == 0) {
673: if (!(flags & SET_FLAGS))
674: return push_inst16(compiler, MOV | SET_REGS44(dst, reg));
675: if (IS_2_LO_REGS(dst, reg))
676: return push_inst16(compiler, MOVS | RD3(dst) | RN3(reg));
677: return push_inst32(compiler, MOV_W | SET_FLAGS | RD4(dst) | RM4(reg));
678: }
679: if (!(flags & KEEP_FLAGS) && IS_2_LO_REGS(dst, reg))
680: return push_inst16(compiler, ASRSI | RD3(dst) | RN3(reg) | (imm << 6));
681: return push_inst32(compiler, ASR_WI | (flags & SET_FLAGS) | RD4(dst) | RM4(reg) | IMM5(imm));
682: }
683: break;
684: default:
685: SLJIT_ASSERT_STOP();
686: break;
687: }
688:
689: if (flags & ARG2_IMM) {
690: FAIL_IF(load_immediate(compiler, TMP_REG2, arg2));
691: arg2 = TMP_REG2;
692: }
693: else {
694: FAIL_IF(load_immediate(compiler, TMP_REG1, arg1));
695: arg1 = TMP_REG1;
696: }
697: }
698:
699: /* Both arguments are registers. */
700: switch (flags & 0xffff) {
701: case SLJIT_MOV:
702: case SLJIT_MOV_UI:
703: case SLJIT_MOV_SI:
704: case SLJIT_MOVU:
705: case SLJIT_MOVU_UI:
706: case SLJIT_MOVU_SI:
707: SLJIT_ASSERT(!(flags & SET_FLAGS) && arg1 == TMP_REG1);
708: return push_inst16(compiler, MOV | SET_REGS44(dst, arg2));
709: case SLJIT_MOV_UB:
710: case SLJIT_MOVU_UB:
711: SLJIT_ASSERT(!(flags & SET_FLAGS) && arg1 == TMP_REG1);
712: if (IS_2_LO_REGS(dst, arg2))
713: return push_inst16(compiler, UXTB | RD3(dst) | RN3(arg2));
714: return push_inst32(compiler, UXTB_W | RD4(dst) | RM4(arg2));
715: case SLJIT_MOV_SB:
716: case SLJIT_MOVU_SB:
717: SLJIT_ASSERT(!(flags & SET_FLAGS) && arg1 == TMP_REG1);
718: if (IS_2_LO_REGS(dst, arg2))
719: return push_inst16(compiler, SXTB | RD3(dst) | RN3(arg2));
720: return push_inst32(compiler, SXTB_W | RD4(dst) | RM4(arg2));
721: case SLJIT_MOV_UH:
722: case SLJIT_MOVU_UH:
723: SLJIT_ASSERT(!(flags & SET_FLAGS) && arg1 == TMP_REG1);
724: if (IS_2_LO_REGS(dst, arg2))
725: return push_inst16(compiler, UXTH | RD3(dst) | RN3(arg2));
726: return push_inst32(compiler, UXTH_W | RD4(dst) | RM4(arg2));
727: case SLJIT_MOV_SH:
728: case SLJIT_MOVU_SH:
729: SLJIT_ASSERT(!(flags & SET_FLAGS) && arg1 == TMP_REG1);
730: if (IS_2_LO_REGS(dst, arg2))
731: return push_inst16(compiler, SXTH | RD3(dst) | RN3(arg2));
732: return push_inst32(compiler, SXTH_W | RD4(dst) | RM4(arg2));
733: case SLJIT_NOT:
734: SLJIT_ASSERT(arg1 == TMP_REG1);
735: if (!(flags & KEEP_FLAGS) && IS_2_LO_REGS(dst, arg2))
736: return push_inst16(compiler, MVNS | RD3(dst) | RN3(arg2));
737: return push_inst32(compiler, MVN_W | (flags & SET_FLAGS) | RD4(dst) | RM4(arg2));
738: case SLJIT_CLZ:
739: SLJIT_ASSERT(arg1 == TMP_REG1);
740: FAIL_IF(push_inst32(compiler, CLZ | RN4(arg2) | RD4(dst) | RM4(arg2)));
741: if (flags & SET_FLAGS) {
742: if (reg_map[dst] <= 7)
743: return push_inst16(compiler, CMPI | RDN3(dst));
744: return push_inst32(compiler, ADD_WI | SET_FLAGS | RN4(dst) | RD4(dst));
745: }
746: return SLJIT_SUCCESS;
747: case SLJIT_ADD:
748: if (!(flags & KEEP_FLAGS) && IS_3_LO_REGS(dst, arg1, arg2))
749: return push_inst16(compiler, ADDS | RD3(dst) | RN3(arg1) | RM3(arg2));
750: if (dst == arg1 && !(flags & SET_FLAGS))
751: return push_inst16(compiler, ADD | SET_REGS44(dst, arg2));
752: return push_inst32(compiler, ADD_W | (flags & SET_FLAGS) | RD4(dst) | RN4(arg1) | RM4(arg2));
753: case SLJIT_ADDC:
754: if (dst == arg1 && !(flags & KEEP_FLAGS) && IS_2_LO_REGS(dst, arg2))
755: return push_inst16(compiler, ADCS | RD3(dst) | RN3(arg2));
756: return push_inst32(compiler, ADC_W | (flags & SET_FLAGS) | RD4(dst) | RN4(arg1) | RM4(arg2));
757: case SLJIT_SUB:
758: if (!(flags & KEEP_FLAGS) && IS_3_LO_REGS(dst, arg1, arg2))
759: return push_inst16(compiler, SUBS | RD3(dst) | RN3(arg1) | RM3(arg2));
760: return push_inst32(compiler, SUB_W | (flags & SET_FLAGS) | RD4(dst) | RN4(arg1) | RM4(arg2));
761: case SLJIT_SUBC:
762: if (dst == arg1 && !(flags & KEEP_FLAGS) && IS_2_LO_REGS(dst, arg2))
763: return push_inst16(compiler, SBCS | RD3(dst) | RN3(arg2));
764: return push_inst32(compiler, SBC_W | (flags & SET_FLAGS) | RD4(dst) | RN4(arg1) | RM4(arg2));
765: case SLJIT_MUL:
766: if (!(flags & SET_FLAGS))
767: return push_inst32(compiler, MUL | RD4(dst) | RN4(arg1) | RM4(arg2));
768: SLJIT_ASSERT(reg_map[TMP_REG2] <= 7 && dst != TMP_REG2);
769: FAIL_IF(push_inst32(compiler, SMULL | RT4(dst) | RD4(TMP_REG2) | RN4(arg1) | RM4(arg2)));
770: /* cmp TMP_REG2, dst asr #31. */
771: return push_inst32(compiler, CMP_W | RN4(TMP_REG2) | 0x70e0 | RM4(dst));
772: case SLJIT_AND:
773: if (!(flags & KEEP_FLAGS)) {
774: if (dst == arg1 && IS_2_LO_REGS(dst, arg2))
775: return push_inst16(compiler, ANDS | RD3(dst) | RN3(arg2));
776: if ((flags & UNUSED_RETURN) && IS_2_LO_REGS(arg1, arg2))
777: return push_inst16(compiler, TST | RD3(arg1) | RN3(arg2));
778: }
779: return push_inst32(compiler, AND_W | (flags & SET_FLAGS) | RD4(dst) | RN4(arg1) | RM4(arg2));
780: case SLJIT_OR:
781: if (dst == arg1 && !(flags & KEEP_FLAGS) && IS_2_LO_REGS(dst, arg2))
782: return push_inst16(compiler, ORRS | RD3(dst) | RN3(arg2));
783: return push_inst32(compiler, ORR_W | (flags & SET_FLAGS) | RD4(dst) | RN4(arg1) | RM4(arg2));
784: case SLJIT_XOR:
785: if (dst == arg1 && !(flags & KEEP_FLAGS) && IS_2_LO_REGS(dst, arg2))
786: return push_inst16(compiler, EORS | RD3(dst) | RN3(arg2));
787: return push_inst32(compiler, EOR_W | (flags & SET_FLAGS) | RD4(dst) | RN4(arg1) | RM4(arg2));
788: case SLJIT_SHL:
789: if (dst == arg1 && !(flags & KEEP_FLAGS) && IS_2_LO_REGS(dst, arg2))
790: return push_inst16(compiler, LSLS | RD3(dst) | RN3(arg2));
791: return push_inst32(compiler, LSL_W | (flags & SET_FLAGS) | RD4(dst) | RN4(arg1) | RM4(arg2));
792: case SLJIT_LSHR:
793: if (dst == arg1 && !(flags & KEEP_FLAGS) && IS_2_LO_REGS(dst, arg2))
794: return push_inst16(compiler, LSRS | RD3(dst) | RN3(arg2));
795: return push_inst32(compiler, LSR_W | (flags & SET_FLAGS) | RD4(dst) | RN4(arg1) | RM4(arg2));
796: case SLJIT_ASHR:
797: if (dst == arg1 && !(flags & KEEP_FLAGS) && IS_2_LO_REGS(dst, arg2))
798: return push_inst16(compiler, ASRS | RD3(dst) | RN3(arg2));
799: return push_inst32(compiler, ASR_W | (flags & SET_FLAGS) | RD4(dst) | RN4(arg1) | RM4(arg2));
800: }
801:
802: SLJIT_ASSERT_STOP();
803: return SLJIT_SUCCESS;
804: }
805:
806: #define STORE 0x01
807: #define SIGNED 0x02
808:
809: #define WORD_SIZE 0x00
810: #define BYTE_SIZE 0x04
811: #define HALF_SIZE 0x08
812:
813: #define UPDATE 0x10
814: #define ARG_TEST 0x20
815:
816: #define IS_WORD_SIZE(flags) (!(flags & (BYTE_SIZE | HALF_SIZE)))
817: #define OFFSET_CHECK(imm, shift) (!(argw & ~(imm << shift)))
818:
819: /*
820: 1st letter:
821: w = word
822: b = byte
823: h = half
824:
825: 2nd letter:
826: s = signed
827: u = unsigned
828:
829: 3rd letter:
830: l = load
831: s = store
832: */
833:
834: static SLJIT_CONST sljit_uw sljit_mem16[12] = {
835: /* w u l */ 0x5800 /* ldr */,
836: /* w u s */ 0x5000 /* str */,
837: /* w s l */ 0x5800 /* ldr */,
838: /* w s s */ 0x5000 /* str */,
839:
840: /* b u l */ 0x5c00 /* ldrb */,
841: /* b u s */ 0x5400 /* strb */,
842: /* b s l */ 0x5600 /* ldrsb */,
843: /* b s s */ 0x5400 /* strb */,
844:
845: /* h u l */ 0x5a00 /* ldrh */,
846: /* h u s */ 0x5200 /* strh */,
847: /* h s l */ 0x5e00 /* ldrsh */,
848: /* h s s */ 0x5200 /* strh */,
849: };
850:
851: static SLJIT_CONST sljit_uw sljit_mem16_imm5[12] = {
852: /* w u l */ 0x6800 /* ldr imm5 */,
853: /* w u s */ 0x6000 /* str imm5 */,
854: /* w s l */ 0x6800 /* ldr imm5 */,
855: /* w s s */ 0x6000 /* str imm5 */,
856:
857: /* b u l */ 0x7800 /* ldrb imm5 */,
858: /* b u s */ 0x7000 /* strb imm5 */,
859: /* b s l */ 0x0000 /* not allowed */,
860: /* b s s */ 0x7000 /* strb imm5 */,
861:
862: /* h u l */ 0x8800 /* ldrh imm5 */,
863: /* h u s */ 0x8000 /* strh imm5 */,
864: /* h s l */ 0x0000 /* not allowed */,
865: /* h s s */ 0x8000 /* strh imm5 */,
866: };
867:
868: #define MEM_IMM8 0xc00
869: #define MEM_IMM12 0x800000
870: static SLJIT_CONST sljit_uw sljit_mem32[12] = {
871: /* w u l */ 0xf8500000 /* ldr.w */,
872: /* w u s */ 0xf8400000 /* str.w */,
873: /* w s l */ 0xf8500000 /* ldr.w */,
874: /* w s s */ 0xf8400000 /* str.w */,
875:
876: /* b u l */ 0xf8100000 /* ldrb.w */,
877: /* b u s */ 0xf8000000 /* strb.w */,
878: /* b s l */ 0xf9100000 /* ldrsb.w */,
879: /* b s s */ 0xf8000000 /* strb.w */,
880:
881: /* h u l */ 0xf8300000 /* ldrh.w */,
882: /* h u s */ 0xf8200000 /* strsh.w */,
883: /* h s l */ 0xf9300000 /* ldrsh.w */,
884: /* h s s */ 0xf8200000 /* strsh.w */,
885: };
886:
887: /* Helper function. Dst should be reg + value, using at most 1 instruction, flags does not set. */
888: static int emit_set_delta(struct sljit_compiler *compiler, int dst, int reg, sljit_w value)
889: {
890: if (value >= 0) {
891: if (value <= 0xfff)
892: return push_inst32(compiler, ADDWI | RD4(dst) | RN4(reg) | IMM12(value));
893: value = get_imm(value);
894: if (value != INVALID_IMM)
895: return push_inst32(compiler, ADD_WI | RD4(dst) | RN4(reg) | value);
896: }
897: else {
898: value = -value;
899: if (value <= 0xfff)
900: return push_inst32(compiler, SUBWI | RD4(dst) | RN4(reg) | IMM12(value));
901: value = get_imm(value);
902: if (value != INVALID_IMM)
903: return push_inst32(compiler, SUB_WI | RD4(dst) | RN4(reg) | value);
904: }
905: return SLJIT_ERR_UNSUPPORTED;
906: }
907:
908: /* Can perform an operation using at most 1 instruction. */
909: static int getput_arg_fast(struct sljit_compiler *compiler, int flags, int reg, int arg, sljit_w argw)
910: {
911: int tmp;
912:
913: SLJIT_ASSERT(arg & SLJIT_MEM);
914:
915: if (SLJIT_UNLIKELY(flags & UPDATE)) {
916: if ((arg & 0xf) && !(arg & 0xf0) && argw <= 0xff && argw >= -0xff) {
917: flags &= ~UPDATE;
918: arg &= 0xf;
919: if (SLJIT_UNLIKELY(flags & ARG_TEST))
920: return 1;
921:
922: if (argw >= 0)
923: argw |= 0x200;
924: else {
925: argw = -argw;
926: }
927: SLJIT_ASSERT(argw >= 0 && (argw & 0xff) <= 0xff);
928: FAIL_IF(push_inst32(compiler, sljit_mem32[flags] | MEM_IMM8 | RT4(reg) | RN4(arg) | 0x100 | argw));
929: return -1;
930: }
931: return (flags & ARG_TEST) ? SLJIT_SUCCESS : 0;
932: }
933:
934: if (SLJIT_UNLIKELY(arg & 0xf0)) {
935: argw &= 0x3;
936: tmp = (arg >> 4) & 0xf;
937: arg &= 0xf;
938: if (SLJIT_UNLIKELY(flags & ARG_TEST))
939: return 1;
940:
941: if (!argw && IS_3_LO_REGS(reg, arg, tmp))
942: FAIL_IF(push_inst16(compiler, sljit_mem16[flags] | RD3(reg) | RN3(arg) | RM3(tmp)));
943: else
944: FAIL_IF(push_inst32(compiler, sljit_mem32[flags] | RT4(reg) | RN4(arg) | RM4(tmp) | (argw << 4)));
945: return -1;
946: }
947:
948: if (!(arg & 0xf) || argw > 0xfff || argw < -0xff)
949: return (flags & ARG_TEST) ? SLJIT_SUCCESS : 0;
950:
951: if (SLJIT_UNLIKELY(flags & ARG_TEST))
952: return 1;
953:
954: arg &= 0xf;
955: if (IS_2_LO_REGS(reg, arg) && sljit_mem16_imm5[flags]) {
956: tmp = 3;
957: if (IS_WORD_SIZE(flags)) {
958: if (OFFSET_CHECK(0x1f, 2))
959: tmp = 2;
960: }
961: else if (flags & BYTE_SIZE)
962: {
963: if (OFFSET_CHECK(0x1f, 0))
964: tmp = 0;
965: }
966: else {
967: SLJIT_ASSERT(flags & HALF_SIZE);
968: if (OFFSET_CHECK(0x1f, 1))
969: tmp = 1;
970: }
971:
972: if (tmp != 3) {
973: FAIL_IF(push_inst16(compiler, sljit_mem16_imm5[flags] | RD3(reg) | RN3(arg) | (argw << (6 - tmp))));
974: return -1;
975: }
976: }
977:
978: /* SP based immediate. */
979: if (SLJIT_UNLIKELY(arg == SLJIT_LOCALS_REG) && OFFSET_CHECK(0xff, 2) && IS_WORD_SIZE(flags) && reg_map[reg] <= 7) {
980: FAIL_IF(push_inst16(compiler, STR_SP | ((flags & STORE) ? 0 : 0x800) | RDN3(reg) | (argw >> 2)));
981: return -1;
982: }
983:
984: if (argw >= 0)
985: FAIL_IF(push_inst32(compiler, sljit_mem32[flags] | MEM_IMM12 | RT4(reg) | RN4(arg) | argw));
986: else
987: FAIL_IF(push_inst32(compiler, sljit_mem32[flags] | MEM_IMM8 | RT4(reg) | RN4(arg) | -argw));
988: return -1;
989: }
990:
991: /* see getput_arg below.
992: Note: can_cache is called only for binary operators. Those
993: operators always uses word arguments without write back. */
994: static int can_cache(int arg, sljit_w argw, int next_arg, sljit_w next_argw)
995: {
996: /* Simple operation except for updates. */
997: if ((arg & 0xf0) || !(next_arg & SLJIT_MEM))
998: return 0;
999:
1000: if (!(arg & 0xf)) {
1001: if ((sljit_uw)(argw - next_argw) <= 0xfff || (sljit_uw)(next_argw - argw) <= 0xfff)
1002: return 1;
1003: return 0;
1004: }
1005:
1006: if (argw == next_argw)
1007: return 1;
1008:
1009: if (arg == next_arg && ((sljit_uw)(argw - next_argw) <= 0xfff || (sljit_uw)(next_argw - argw) <= 0xfff))
1010: return 1;
1011:
1012: return 0;
1013: }
1014:
1015: /* Emit the necessary instructions. See can_cache above. */
1016: static int getput_arg(struct sljit_compiler *compiler, int flags, int reg, int arg, sljit_w argw, int next_arg, sljit_w next_argw)
1017: {
1018: int tmp_r;
1019: sljit_w tmp;
1020:
1021: SLJIT_ASSERT(arg & SLJIT_MEM);
1022: if (!(next_arg & SLJIT_MEM)) {
1023: next_arg = 0;
1024: next_argw = 0;
1025: }
1026:
1027: tmp_r = (flags & STORE) ? TMP_REG3 : reg;
1028:
1029: if (SLJIT_UNLIKELY(flags & UPDATE)) {
1030: flags &= ~UPDATE;
1031: /* Update only applies if a base register exists. */
1032: if (arg & 0xf) {
1033: /* There is no caching here. */
1034: tmp = (arg & 0xf0) >> 4;
1035: arg &= 0xf;
1036:
1037: if (!tmp) {
1038: if (!(argw & ~0xfff)) {
1039: FAIL_IF(push_inst32(compiler, sljit_mem32[flags] | MEM_IMM12 | RT4(reg) | RN4(arg) | argw));
1040: return push_inst32(compiler, ADDWI | RD4(arg) | RN4(arg) | IMM12(argw));
1041: }
1042:
1043: if (compiler->cache_arg == SLJIT_MEM) {
1044: if (argw == compiler->cache_argw) {
1045: tmp = TMP_REG3;
1046: argw = 0;
1047: }
1048: else if (emit_set_delta(compiler, TMP_REG3, TMP_REG3, argw - compiler->cache_argw) != SLJIT_ERR_UNSUPPORTED) {
1049: FAIL_IF(compiler->error);
1050: compiler->cache_argw = argw;
1051: tmp = TMP_REG3;
1052: argw = 0;
1053: }
1054: }
1055:
1056: if (argw) {
1057: FAIL_IF(load_immediate(compiler, TMP_REG3, argw));
1058: compiler->cache_arg = SLJIT_MEM;
1059: compiler->cache_argw = argw;
1060: tmp = TMP_REG3;
1061: argw = 0;
1062: }
1063: }
1064:
1065: argw &= 0x3;
1066: if (!argw && IS_3_LO_REGS(reg, arg, tmp)) {
1067: FAIL_IF(push_inst16(compiler, sljit_mem16[flags] | RD3(reg) | RN3(arg) | RM3(tmp)));
1068: return push_inst16(compiler, ADD | SET_REGS44(arg, tmp));
1069: }
1070: FAIL_IF(push_inst32(compiler, sljit_mem32[flags] | RT4(reg) | RN4(arg) | RM4(tmp) | (argw << 4)));
1071: return push_inst32(compiler, ADD_W | RD4(arg) | RN4(arg) | RM4(tmp) | (argw << 6));
1072: }
1073: }
1074:
1075: SLJIT_ASSERT(!(arg & 0xf0));
1076:
1077: if (compiler->cache_arg == arg) {
1078: if (!((argw - compiler->cache_argw) & ~0xfff))
1079: return push_inst32(compiler, sljit_mem32[flags] | MEM_IMM12 | RT4(reg) | RN4(TMP_REG3) | (argw - compiler->cache_argw));
1080: if (!((compiler->cache_argw - argw) & ~0xff))
1081: return push_inst32(compiler, sljit_mem32[flags] | MEM_IMM8 | RT4(reg) | RN4(TMP_REG3) | (compiler->cache_argw - argw));
1082: if (emit_set_delta(compiler, TMP_REG3, TMP_REG3, argw - compiler->cache_argw) != SLJIT_ERR_UNSUPPORTED) {
1083: FAIL_IF(compiler->error);
1084: return push_inst32(compiler, sljit_mem32[flags] | MEM_IMM12 | RT4(reg) | RN4(TMP_REG3) | 0);
1085: }
1086: }
1087:
1088: next_arg = (arg & 0xf) && (arg == next_arg);
1089: arg &= 0xf;
1090: if (arg && compiler->cache_arg == SLJIT_MEM && compiler->cache_argw == argw)
1091: return push_inst32(compiler, sljit_mem32[flags] | RT4(reg) | RN4(arg) | RM4(TMP_REG3));
1092:
1093: compiler->cache_argw = argw;
1094: if (next_arg && emit_set_delta(compiler, TMP_REG3, arg, argw) != SLJIT_ERR_UNSUPPORTED) {
1095: FAIL_IF(compiler->error);
1096: compiler->cache_arg = SLJIT_MEM | arg;
1097: arg = 0;
1098: }
1099: else {
1100: FAIL_IF(load_immediate(compiler, TMP_REG3, argw));
1101: compiler->cache_arg = SLJIT_MEM;
1102:
1103: if (next_arg) {
1104: FAIL_IF(push_inst16(compiler, ADD | SET_REGS44(TMP_REG3, arg)));
1105: compiler->cache_arg = SLJIT_MEM | arg;
1106: arg = 0;
1107: }
1108: }
1109:
1110: if (arg)
1111: return push_inst32(compiler, sljit_mem32[flags] | RT4(reg) | RN4(arg) | RM4(TMP_REG3));
1112: return push_inst32(compiler, sljit_mem32[flags] | MEM_IMM12 | RT4(reg) | RN4(TMP_REG3) | 0);
1113: }
1114:
1115: static SLJIT_INLINE int emit_op_mem(struct sljit_compiler *compiler, int flags, int reg, int arg, sljit_w argw)
1116: {
1117: if (getput_arg_fast(compiler, flags, reg, arg, argw))
1118: return compiler->error;
1119: compiler->cache_arg = 0;
1120: compiler->cache_argw = 0;
1121: return getput_arg(compiler, flags, reg, arg, argw, 0, 0);
1122: }
1123:
1124: SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_enter(struct sljit_compiler *compiler, int args, int temporaries, int saveds, int local_size)
1125: {
1126: int size;
1127: sljit_ins push;
1128:
1129: CHECK_ERROR();
1130: check_sljit_emit_enter(compiler, args, temporaries, saveds, local_size);
1131:
1132: compiler->temporaries = temporaries;
1133: compiler->saveds = saveds;
1134: #if (defined SLJIT_DEBUG && SLJIT_DEBUG)
1135: compiler->logical_local_size = local_size;
1136: #endif
1137:
1138: push = (1 << 4);
1139: if (saveds >= 5)
1140: push |= 1 << 11;
1141: if (saveds >= 4)
1142: push |= 1 << 10;
1143: if (saveds >= 3)
1144: push |= 1 << 8;
1145: if (saveds >= 2)
1146: push |= 1 << 7;
1147: if (saveds >= 1)
1148: push |= 1 << 6;
1149: if (temporaries >= 5)
1150: push |= 1 << 5;
1151: FAIL_IF(saveds >= 3
1152: ? push_inst32(compiler, PUSH_W | (1 << 14) | push)
1153: : push_inst16(compiler, PUSH | push));
1154:
1155: /* Stack must be aligned to 8 bytes: */
1156: size = (3 + saveds) * sizeof(sljit_uw);
1157: local_size += size;
1158: local_size = (local_size + 7) & ~7;
1159: local_size -= size;
1160: compiler->local_size = local_size;
1161: if (local_size > 0) {
1162: if (local_size <= (127 << 2))
1163: FAIL_IF(push_inst16(compiler, SUB_SP | (local_size >> 2)));
1164: else
1165: FAIL_IF(emit_op_imm(compiler, SLJIT_SUB | ARG2_IMM, SLJIT_LOCALS_REG, SLJIT_LOCALS_REG, local_size));
1166: }
1167:
1168: if (args >= 1)
1169: FAIL_IF(push_inst16(compiler, MOV | SET_REGS44(SLJIT_SAVED_REG1, SLJIT_TEMPORARY_REG1)));
1170: if (args >= 2)
1171: FAIL_IF(push_inst16(compiler, MOV | SET_REGS44(SLJIT_SAVED_REG2, SLJIT_TEMPORARY_REG2)));
1172: if (args >= 3)
1173: FAIL_IF(push_inst16(compiler, MOV | SET_REGS44(SLJIT_SAVED_REG3, SLJIT_TEMPORARY_REG3)));
1174:
1175: return SLJIT_SUCCESS;
1176: }
1177:
1178: SLJIT_API_FUNC_ATTRIBUTE void sljit_set_context(struct sljit_compiler *compiler, int args, int temporaries, int saveds, int local_size)
1179: {
1180: int size;
1181:
1182: CHECK_ERROR_VOID();
1183: check_sljit_set_context(compiler, args, temporaries, saveds, local_size);
1184:
1185: compiler->temporaries = temporaries;
1186: compiler->saveds = saveds;
1187: #if (defined SLJIT_DEBUG && SLJIT_DEBUG)
1188: compiler->logical_local_size = local_size;
1189: #endif
1190:
1191: size = (3 + saveds) * sizeof(sljit_uw);
1192: local_size += size;
1193: local_size = (local_size + 7) & ~7;
1194: local_size -= size;
1195: compiler->local_size = local_size;
1196: }
1197:
1198: SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_return(struct sljit_compiler *compiler, int op, int src, sljit_w srcw)
1199: {
1200: sljit_ins pop;
1201:
1202: CHECK_ERROR();
1203: check_sljit_emit_return(compiler, op, src, srcw);
1204: ADJUST_LOCAL_OFFSET(src, srcw);
1205:
1206: FAIL_IF(emit_mov_before_return(compiler, op, src, srcw));
1207:
1208: if (compiler->local_size > 0) {
1209: if (compiler->local_size <= (127 << 2))
1210: FAIL_IF(push_inst16(compiler, ADD_SP | (compiler->local_size >> 2)));
1211: else
1212: FAIL_IF(emit_op_imm(compiler, SLJIT_ADD | ARG2_IMM, SLJIT_LOCALS_REG, SLJIT_LOCALS_REG, compiler->local_size));
1213: }
1214:
1215: pop = (1 << 4);
1216: if (compiler->saveds >= 5)
1217: pop |= 1 << 11;
1218: if (compiler->saveds >= 4)
1219: pop |= 1 << 10;
1220: if (compiler->saveds >= 3)
1221: pop |= 1 << 8;
1222: if (compiler->saveds >= 2)
1223: pop |= 1 << 7;
1224: if (compiler->saveds >= 1)
1225: pop |= 1 << 6;
1226: if (compiler->temporaries >= 5)
1227: pop |= 1 << 5;
1228: return compiler->saveds >= 3
1229: ? push_inst32(compiler, POP_W | (1 << 15) | pop)
1230: : push_inst16(compiler, POP | pop);
1231: }
1232:
1233: /* --------------------------------------------------------------------- */
1234: /* Operators */
1235: /* --------------------------------------------------------------------- */
1236:
1237: #ifdef __cplusplus
1238: extern "C" {
1239: #endif
1240:
1241: #if defined(__GNUC__)
1242: extern unsigned int __aeabi_uidivmod(unsigned numerator, unsigned denominator);
1243: extern unsigned int __aeabi_idivmod(unsigned numerator, unsigned denominator);
1244: #else
1245: #error "Software divmod functions are needed"
1246: #endif
1247:
1248: #ifdef __cplusplus
1249: }
1250: #endif
1251:
1252: SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_op0(struct sljit_compiler *compiler, int op)
1253: {
1254: CHECK_ERROR();
1255: check_sljit_emit_op0(compiler, op);
1256:
1257: op = GET_OPCODE(op);
1258: switch (op) {
1259: case SLJIT_BREAKPOINT:
1260: push_inst16(compiler, BKPT);
1261: break;
1262: case SLJIT_NOP:
1263: push_inst16(compiler, NOP);
1264: break;
1265: case SLJIT_UMUL:
1266: case SLJIT_SMUL:
1267: return push_inst32(compiler, (op == SLJIT_UMUL ? UMULL : SMULL)
1268: | (reg_map[SLJIT_TEMPORARY_REG2] << 8)
1269: | (reg_map[SLJIT_TEMPORARY_REG1] << 12)
1270: | (reg_map[SLJIT_TEMPORARY_REG1] << 16)
1271: | reg_map[SLJIT_TEMPORARY_REG2]);
1272: case SLJIT_UDIV:
1273: case SLJIT_SDIV:
1274: if (compiler->temporaries >= 4) {
1275: FAIL_IF(push_inst32(compiler, 0xf84d2d04 /* str r2, [sp, #-4]! */));
1276: FAIL_IF(push_inst32(compiler, 0xf84dcd04 /* str ip, [sp, #-4]! */));
1277: } else if (compiler->temporaries >= 3)
1278: FAIL_IF(push_inst32(compiler, 0xf84d2d08 /* str r2, [sp, #-8]! */));
1279: #if defined(__GNUC__)
1280: FAIL_IF(sljit_emit_ijump(compiler, SLJIT_FAST_CALL, SLJIT_IMM,
1281: (op == SLJIT_UDIV ? SLJIT_FUNC_OFFSET(__aeabi_uidivmod) : SLJIT_FUNC_OFFSET(__aeabi_idivmod))));
1282: #else
1283: #error "Software divmod functions are needed"
1284: #endif
1285: if (compiler->temporaries >= 4) {
1286: FAIL_IF(push_inst32(compiler, 0xf85dcb04 /* ldr ip, [sp], #4 */));
1287: return push_inst32(compiler, 0xf85d2b04 /* ldr r2, [sp], #4 */);
1288: } else if (compiler->temporaries >= 3)
1289: return push_inst32(compiler, 0xf85d2b08 /* ldr r2, [sp], #8 */);
1290: return SLJIT_SUCCESS;
1291: }
1292:
1293: return SLJIT_SUCCESS;
1294: }
1295:
1296: SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_op1(struct sljit_compiler *compiler, int op,
1297: int dst, sljit_w dstw,
1298: int src, sljit_w srcw)
1299: {
1300: int op_type, dst_r, flags;
1301:
1302: CHECK_ERROR();
1303: check_sljit_emit_op1(compiler, op, dst, dstw, src, srcw);
1304: ADJUST_LOCAL_OFFSET(dst, dstw);
1305: ADJUST_LOCAL_OFFSET(src, srcw);
1306:
1307: compiler->cache_arg = 0;
1308: compiler->cache_argw = 0;
1309:
1310: op_type = GET_OPCODE(op);
1311: dst_r = (dst >= SLJIT_TEMPORARY_REG1 && dst <= SLJIT_NO_REGISTERS) ? dst : TMP_REG1;
1312:
1313: if (op_type >= SLJIT_MOV && op_type <= SLJIT_MOVU_SI) {
1314: switch (op_type) {
1315: case SLJIT_MOV:
1316: case SLJIT_MOV_UI:
1317: case SLJIT_MOV_SI:
1318: flags = WORD_SIZE;
1319: break;
1320: case SLJIT_MOV_UB:
1321: flags = BYTE_SIZE;
1322: if (src & SLJIT_IMM)
1323: srcw = (unsigned char)srcw;
1324: break;
1325: case SLJIT_MOV_SB:
1326: flags = BYTE_SIZE | SIGNED;
1327: if (src & SLJIT_IMM)
1328: srcw = (signed char)srcw;
1329: break;
1330: case SLJIT_MOV_UH:
1331: flags = HALF_SIZE;
1332: if (src & SLJIT_IMM)
1333: srcw = (unsigned short)srcw;
1334: break;
1335: case SLJIT_MOV_SH:
1336: flags = HALF_SIZE | SIGNED;
1337: if (src & SLJIT_IMM)
1338: srcw = (signed short)srcw;
1339: break;
1340: case SLJIT_MOVU:
1341: case SLJIT_MOVU_UI:
1342: case SLJIT_MOVU_SI:
1343: flags = WORD_SIZE | UPDATE;
1344: break;
1345: case SLJIT_MOVU_UB:
1346: flags = BYTE_SIZE | UPDATE;
1347: if (src & SLJIT_IMM)
1348: srcw = (unsigned char)srcw;
1349: break;
1350: case SLJIT_MOVU_SB:
1351: flags = BYTE_SIZE | SIGNED | UPDATE;
1352: if (src & SLJIT_IMM)
1353: srcw = (signed char)srcw;
1354: break;
1355: case SLJIT_MOVU_UH:
1356: flags = HALF_SIZE | UPDATE;
1357: if (src & SLJIT_IMM)
1358: srcw = (unsigned short)srcw;
1359: break;
1360: case SLJIT_MOVU_SH:
1361: flags = HALF_SIZE | SIGNED | UPDATE;
1362: if (src & SLJIT_IMM)
1363: srcw = (signed short)srcw;
1364: break;
1365: default:
1366: SLJIT_ASSERT_STOP();
1367: flags = 0;
1368: break;
1369: }
1370:
1371: if (src & SLJIT_IMM)
1372: FAIL_IF(emit_op_imm(compiler, SLJIT_MOV | ARG2_IMM, dst_r, TMP_REG1, srcw));
1373: else if (src & SLJIT_MEM) {
1374: if (getput_arg_fast(compiler, flags, dst_r, src, srcw))
1375: FAIL_IF(compiler->error);
1376: else
1377: FAIL_IF(getput_arg(compiler, flags, dst_r, src, srcw, dst, dstw));
1378: } else {
1379: if (dst_r != TMP_REG1)
1380: return emit_op_imm(compiler, op_type, dst_r, TMP_REG1, src);
1381: dst_r = src;
1382: }
1383:
1384: if (dst & SLJIT_MEM) {
1385: if (getput_arg_fast(compiler, flags | STORE, dst_r, dst, dstw))
1386: return compiler->error;
1387: else
1388: return getput_arg(compiler, flags | STORE, dst_r, dst, dstw, 0, 0);
1389: }
1390: return SLJIT_SUCCESS;
1391: }
1392:
1393: if (op_type == SLJIT_NEG) {
1394: #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) || (defined SLJIT_DEBUG && SLJIT_DEBUG)
1395: compiler->skip_checks = 1;
1396: #endif
1397: return sljit_emit_op2(compiler, GET_FLAGS(op) | SLJIT_SUB, dst, dstw, SLJIT_IMM, 0, src, srcw);
1398: }
1399:
1400: flags = (GET_FLAGS(op) ? SET_FLAGS : 0) | ((op & SLJIT_KEEP_FLAGS) ? KEEP_FLAGS : 0);
1401: if (src & SLJIT_MEM) {
1402: if (getput_arg_fast(compiler, WORD_SIZE, TMP_REG2, src, srcw))
1403: FAIL_IF(compiler->error);
1404: else
1405: FAIL_IF(getput_arg(compiler, WORD_SIZE, TMP_REG2, src, srcw, dst, dstw));
1406: src = TMP_REG2;
1407: }
1408:
1409: if (src & SLJIT_IMM)
1410: flags |= ARG2_IMM;
1411: else
1412: srcw = src;
1413:
1414: emit_op_imm(compiler, flags | op_type, dst_r, TMP_REG1, srcw);
1415:
1416: if (dst & SLJIT_MEM) {
1417: if (getput_arg_fast(compiler, flags | STORE, dst_r, dst, dstw))
1418: return compiler->error;
1419: else
1420: return getput_arg(compiler, flags | STORE, dst_r, dst, dstw, 0, 0);
1421: }
1422: return SLJIT_SUCCESS;
1423: }
1424:
1425: SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_op2(struct sljit_compiler *compiler, int op,
1426: int dst, sljit_w dstw,
1427: int src1, sljit_w src1w,
1428: int src2, sljit_w src2w)
1429: {
1430: int dst_r, flags;
1431:
1432: CHECK_ERROR();
1433: check_sljit_emit_op2(compiler, op, dst, dstw, src1, src1w, src2, src2w);
1434: ADJUST_LOCAL_OFFSET(dst, dstw);
1435: ADJUST_LOCAL_OFFSET(src1, src1w);
1436: ADJUST_LOCAL_OFFSET(src2, src2w);
1437:
1438: compiler->cache_arg = 0;
1439: compiler->cache_argw = 0;
1440:
1441: dst_r = (dst >= SLJIT_TEMPORARY_REG1 && dst <= SLJIT_NO_REGISTERS) ? dst : TMP_REG1;
1442: flags = (GET_FLAGS(op) ? SET_FLAGS : 0) | ((op & SLJIT_KEEP_FLAGS) ? KEEP_FLAGS : 0);
1443:
1444: if ((dst & SLJIT_MEM) && !getput_arg_fast(compiler, WORD_SIZE | STORE | ARG_TEST, TMP_REG1, dst, dstw))
1445: flags |= SLOW_DEST;
1446:
1447: if (src1 & SLJIT_MEM) {
1448: if (getput_arg_fast(compiler, WORD_SIZE, TMP_REG1, src1, src1w))
1449: FAIL_IF(compiler->error);
1450: else
1451: flags |= SLOW_SRC1;
1452: }
1453: if (src2 & SLJIT_MEM) {
1454: if (getput_arg_fast(compiler, WORD_SIZE, TMP_REG2, src2, src2w))
1455: FAIL_IF(compiler->error);
1456: else
1457: flags |= SLOW_SRC2;
1458: }
1459:
1460: if ((flags & (SLOW_SRC1 | SLOW_SRC2)) == (SLOW_SRC1 | SLOW_SRC2)) {
1461: if (!can_cache(src1, src1w, src2, src2w) && can_cache(src1, src1w, dst, dstw)) {
1462: FAIL_IF(getput_arg(compiler, WORD_SIZE, TMP_REG2, src2, src2w, src1, src1w));
1463: FAIL_IF(getput_arg(compiler, WORD_SIZE, TMP_REG1, src1, src1w, dst, dstw));
1464: }
1465: else {
1466: FAIL_IF(getput_arg(compiler, WORD_SIZE, TMP_REG1, src1, src1w, src2, src2w));
1467: FAIL_IF(getput_arg(compiler, WORD_SIZE, TMP_REG2, src2, src2w, dst, dstw));
1468: }
1469: }
1470: else if (flags & SLOW_SRC1)
1471: FAIL_IF(getput_arg(compiler, WORD_SIZE, TMP_REG1, src1, src1w, dst, dstw));
1472: else if (flags & SLOW_SRC2)
1473: FAIL_IF(getput_arg(compiler, WORD_SIZE, TMP_REG2, src2, src2w, dst, dstw));
1474:
1475: if (src1 & SLJIT_MEM)
1476: src1 = TMP_REG1;
1477: if (src2 & SLJIT_MEM)
1478: src2 = TMP_REG2;
1479:
1480: if (src1 & SLJIT_IMM)
1481: flags |= ARG1_IMM;
1482: else
1483: src1w = src1;
1484: if (src2 & SLJIT_IMM)
1485: flags |= ARG2_IMM;
1486: else
1487: src2w = src2;
1488:
1489: if (dst == SLJIT_UNUSED)
1490: flags |= UNUSED_RETURN;
1491:
1492: if (GET_OPCODE(op) == SLJIT_MUL && (op & SLJIT_SET_O))
1493: flags |= SET_MULOV;
1494:
1495: emit_op_imm(compiler, flags | GET_OPCODE(op), dst_r, src1w, src2w);
1496:
1497: if (dst & SLJIT_MEM) {
1498: if (!(flags & SLOW_DEST)) {
1499: getput_arg_fast(compiler, WORD_SIZE | STORE, dst_r, dst, dstw);
1500: return compiler->error;
1501: }
1502: return getput_arg(compiler, WORD_SIZE | STORE, TMP_REG1, dst, dstw, 0, 0);
1503: }
1504: return SLJIT_SUCCESS;
1505: }
1506:
1507: SLJIT_API_FUNC_ATTRIBUTE int sljit_get_register_index(int reg)
1508: {
1509: check_sljit_get_register_index(reg);
1510: return reg_map[reg];
1511: }
1512:
1513: SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_op_custom(struct sljit_compiler *compiler,
1514: void *instruction, int size)
1515: {
1516: CHECK_ERROR();
1517: check_sljit_emit_op_custom(compiler, instruction, size);
1518: SLJIT_ASSERT(size == 2 || size == 4);
1519:
1520: if (size == 2)
1521: return push_inst16(compiler, *(sljit_uh*)instruction);
1522: return push_inst32(compiler, *(sljit_ins*)instruction);
1523: }
1524:
1525: /* --------------------------------------------------------------------- */
1526: /* Floating point operators */
1527: /* --------------------------------------------------------------------- */
1528:
1529: SLJIT_API_FUNC_ATTRIBUTE int sljit_is_fpu_available(void)
1530: {
1531: return 1;
1532: }
1533:
1534: static int emit_fop_mem(struct sljit_compiler *compiler, int flags, int reg, int arg, sljit_w argw)
1535: {
1536: sljit_w tmp;
1537: sljit_w inst = VSTR | ((flags & STORE) ? 0 : 0x00100000);
1538:
1539: SLJIT_ASSERT(arg & SLJIT_MEM);
1540:
1541: /* Fast loads and stores. */
1542: if (SLJIT_UNLIKELY(arg & 0xf0)) {
1543: FAIL_IF(push_inst32(compiler, ADD_W | RD4(TMP_REG2) | RN4(arg & 0xf) | RM4((arg & 0xf0) >> 4) | ((argw & 0x3) << 6)));
1544: arg = SLJIT_MEM | TMP_REG2;
1545: argw = 0;
1546: }
1547:
1548: if (arg & 0xf) {
1549: if (!(argw & ~0x3fc))
1550: return push_inst32(compiler, inst | 0x800000 | RN4(arg & 0xf) | DD4(reg) | (argw >> 2));
1551: if (!(-argw & ~0x3fc))
1552: return push_inst32(compiler, inst | RN4(arg & 0xf) | DD4(reg) | (-argw >> 2));
1553: }
1554:
1555: SLJIT_ASSERT(!(arg & 0xf0));
1556: if (compiler->cache_arg == arg) {
1557: tmp = argw - compiler->cache_argw;
1558: if (!(tmp & ~0x3fc))
1559: return push_inst32(compiler, inst | 0x800000 | RN4(TMP_REG3) | DD4(reg) | (tmp >> 2));
1560: if (!(-tmp & ~0x3fc))
1561: return push_inst32(compiler, inst | RN4(TMP_REG3) | DD4(reg) | (-tmp >> 2));
1562: if (emit_set_delta(compiler, TMP_REG3, TMP_REG3, tmp) != SLJIT_ERR_UNSUPPORTED) {
1563: FAIL_IF(compiler->error);
1564: compiler->cache_argw = argw;
1565: return push_inst32(compiler, inst | 0x800000 | RN4(TMP_REG3) | DD4(reg));
1566: }
1567: }
1568:
1569: compiler->cache_arg = arg;
1570: compiler->cache_argw = argw;
1571:
1572: if (SLJIT_UNLIKELY(!(arg & 0xf)))
1573: FAIL_IF(load_immediate(compiler, TMP_REG3, argw));
1574: else if (emit_set_delta(compiler, TMP_REG3, arg & 0xf, argw) != SLJIT_ERR_UNSUPPORTED)
1575: FAIL_IF(compiler->error);
1576: else {
1577: FAIL_IF(load_immediate(compiler, TMP_REG3, argw));
1578: if (arg & 0xf)
1579: FAIL_IF(push_inst16(compiler, ADD | SET_REGS44(TMP_REG3, (arg & 0xf))));
1580: }
1581: return push_inst32(compiler, inst | 0x800000 | RN4(TMP_REG3) | DD4(reg));
1582: }
1583:
1584: SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_fop1(struct sljit_compiler *compiler, int op,
1585: int dst, sljit_w dstw,
1586: int src, sljit_w srcw)
1587: {
1588: int dst_r;
1589:
1590: CHECK_ERROR();
1591: check_sljit_emit_fop1(compiler, op, dst, dstw, src, srcw);
1592:
1593: compiler->cache_arg = 0;
1594: compiler->cache_argw = 0;
1595:
1596: if (GET_OPCODE(op) == SLJIT_FCMP) {
1597: if (dst & SLJIT_MEM) {
1598: emit_fop_mem(compiler, 0, TMP_FREG1, dst, dstw);
1599: dst = TMP_FREG1;
1600: }
1601: if (src & SLJIT_MEM) {
1602: emit_fop_mem(compiler, 0, TMP_FREG2, src, srcw);
1603: src = TMP_FREG2;
1604: }
1605: FAIL_IF(push_inst32(compiler, VCMP_F64 | DD4(dst) | DM4(src)));
1606: return push_inst32(compiler, VMRS);
1607: }
1608:
1609: dst_r = (dst >= SLJIT_FLOAT_REG1 && dst <= SLJIT_FLOAT_REG4) ? dst : TMP_FREG1;
1610: if (src & SLJIT_MEM) {
1611: emit_fop_mem(compiler, 0, dst_r, src, srcw);
1612: src = dst_r;
1613: }
1614:
1615: switch (GET_OPCODE(op)) {
1616: case SLJIT_FMOV:
1617: if (src != dst_r)
1618: FAIL_IF(push_inst32(compiler, VMOV_F64 | DD4(dst_r) | DM4(src)));
1619: break;
1620: case SLJIT_FNEG:
1621: FAIL_IF(push_inst32(compiler, VNEG_F64 | DD4(dst_r) | DM4(src)));
1622: break;
1623: case SLJIT_FABS:
1624: FAIL_IF(push_inst32(compiler, VABS_F64 | DD4(dst_r) | DM4(src)));
1625: break;
1626: }
1627:
1628: if (dst & SLJIT_MEM)
1629: return emit_fop_mem(compiler, STORE, TMP_FREG1, dst, dstw);
1630: return SLJIT_SUCCESS;
1631: }
1632:
1633: SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_fop2(struct sljit_compiler *compiler, int op,
1634: int dst, sljit_w dstw,
1635: int src1, sljit_w src1w,
1636: int src2, sljit_w src2w)
1637: {
1638: int dst_r;
1639:
1640: CHECK_ERROR();
1641: check_sljit_emit_fop2(compiler, op, dst, dstw, src1, src1w, src2, src2w);
1642:
1643: compiler->cache_arg = 0;
1644: compiler->cache_argw = 0;
1645:
1646: dst_r = (dst >= SLJIT_FLOAT_REG1 && dst <= SLJIT_FLOAT_REG4) ? dst : TMP_FREG1;
1647: if (src1 & SLJIT_MEM) {
1648: emit_fop_mem(compiler, 0, TMP_FREG1, src1, src1w);
1649: src1 = TMP_FREG1;
1650: }
1651: if (src2 & SLJIT_MEM) {
1652: emit_fop_mem(compiler, 0, TMP_FREG2, src2, src2w);
1653: src2 = TMP_FREG2;
1654: }
1655:
1656: switch (GET_OPCODE(op)) {
1657: case SLJIT_FADD:
1658: FAIL_IF(push_inst32(compiler, VADD_F64 | DD4(dst_r) | DN4(src1) | DM4(src2)));
1659: break;
1660: case SLJIT_FSUB:
1661: FAIL_IF(push_inst32(compiler, VSUB_F64 | DD4(dst_r) | DN4(src1) | DM4(src2)));
1662: break;
1663: case SLJIT_FMUL:
1664: FAIL_IF(push_inst32(compiler, VMUL_F64 | DD4(dst_r) | DN4(src1) | DM4(src2)));
1665: break;
1666: case SLJIT_FDIV:
1667: FAIL_IF(push_inst32(compiler, VDIV_F64 | DD4(dst_r) | DN4(src1) | DM4(src2)));
1668: break;
1669: }
1670:
1671: if (dst & SLJIT_MEM)
1672: return emit_fop_mem(compiler, STORE, TMP_FREG1, dst, dstw);
1673: return SLJIT_SUCCESS;
1674: }
1675:
1676: /* --------------------------------------------------------------------- */
1677: /* Other instructions */
1678: /* --------------------------------------------------------------------- */
1679:
1680: SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_fast_enter(struct sljit_compiler *compiler, int dst, sljit_w dstw)
1681: {
1682: CHECK_ERROR();
1683: check_sljit_emit_fast_enter(compiler, dst, dstw);
1684: ADJUST_LOCAL_OFFSET(dst, dstw);
1685:
1686: if (dst >= SLJIT_TEMPORARY_REG1 && dst <= SLJIT_NO_REGISTERS)
1687: return push_inst16(compiler, MOV | SET_REGS44(dst, TMP_REG3));
1688: else if (dst & SLJIT_MEM) {
1689: if (getput_arg_fast(compiler, WORD_SIZE | STORE, TMP_REG3, dst, dstw))
1690: return compiler->error;
1691: FAIL_IF(push_inst16(compiler, MOV | SET_REGS44(TMP_REG2, TMP_REG3)));
1692: compiler->cache_arg = 0;
1693: compiler->cache_argw = 0;
1694: return getput_arg(compiler, WORD_SIZE | STORE, TMP_REG2, dst, dstw, 0, 0);
1695: }
1696:
1697: return SLJIT_SUCCESS;
1698: }
1699:
1700: SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_fast_return(struct sljit_compiler *compiler, int src, sljit_w srcw)
1701: {
1702: CHECK_ERROR();
1703: check_sljit_emit_fast_return(compiler, src, srcw);
1704: ADJUST_LOCAL_OFFSET(src, srcw);
1705:
1706: if (src >= SLJIT_TEMPORARY_REG1 && src <= SLJIT_NO_REGISTERS)
1707: FAIL_IF(push_inst16(compiler, MOV | SET_REGS44(TMP_REG3, src)));
1708: else if (src & SLJIT_MEM) {
1709: if (getput_arg_fast(compiler, WORD_SIZE, TMP_REG3, src, srcw))
1710: FAIL_IF(compiler->error);
1711: else {
1712: compiler->cache_arg = 0;
1713: compiler->cache_argw = 0;
1714: FAIL_IF(getput_arg(compiler, WORD_SIZE, TMP_REG2, src, srcw, 0, 0));
1715: FAIL_IF(push_inst16(compiler, MOV | SET_REGS44(TMP_REG3, TMP_REG2)));
1716: }
1717: }
1718: else if (src & SLJIT_IMM)
1719: FAIL_IF(load_immediate(compiler, TMP_REG3, srcw));
1720: return push_inst16(compiler, BLX | RN3(TMP_REG3));
1721: }
1722:
1723: /* --------------------------------------------------------------------- */
1724: /* Conditional instructions */
1725: /* --------------------------------------------------------------------- */
1726:
1727: static sljit_uw get_cc(int type)
1728: {
1729: switch (type) {
1730: case SLJIT_C_EQUAL:
1731: case SLJIT_C_MUL_NOT_OVERFLOW:
1732: case SLJIT_C_FLOAT_EQUAL:
1733: return 0x0;
1734:
1735: case SLJIT_C_NOT_EQUAL:
1736: case SLJIT_C_MUL_OVERFLOW:
1737: case SLJIT_C_FLOAT_NOT_EQUAL:
1738: return 0x1;
1739:
1740: case SLJIT_C_LESS:
1741: case SLJIT_C_FLOAT_LESS:
1742: return 0x3;
1743:
1744: case SLJIT_C_GREATER_EQUAL:
1745: case SLJIT_C_FLOAT_GREATER_EQUAL:
1746: return 0x2;
1747:
1748: case SLJIT_C_GREATER:
1749: case SLJIT_C_FLOAT_GREATER:
1750: return 0x8;
1751:
1752: case SLJIT_C_LESS_EQUAL:
1753: case SLJIT_C_FLOAT_LESS_EQUAL:
1754: return 0x9;
1755:
1756: case SLJIT_C_SIG_LESS:
1757: return 0xb;
1758:
1759: case SLJIT_C_SIG_GREATER_EQUAL:
1760: return 0xa;
1761:
1762: case SLJIT_C_SIG_GREATER:
1763: return 0xc;
1764:
1765: case SLJIT_C_SIG_LESS_EQUAL:
1766: return 0xd;
1767:
1768: case SLJIT_C_OVERFLOW:
1769: case SLJIT_C_FLOAT_NAN:
1770: return 0x6;
1771:
1772: case SLJIT_C_NOT_OVERFLOW:
1773: case SLJIT_C_FLOAT_NOT_NAN:
1774: return 0x7;
1775:
1776: default: /* SLJIT_JUMP */
1777: return 0xe;
1778: }
1779: }
1780:
1781: SLJIT_API_FUNC_ATTRIBUTE struct sljit_label* sljit_emit_label(struct sljit_compiler *compiler)
1782: {
1783: struct sljit_label *label;
1784:
1785: CHECK_ERROR_PTR();
1786: check_sljit_emit_label(compiler);
1787:
1788: if (compiler->last_label && compiler->last_label->size == compiler->size)
1789: return compiler->last_label;
1790:
1791: label = (struct sljit_label*)ensure_abuf(compiler, sizeof(struct sljit_label));
1792: PTR_FAIL_IF(!label);
1793: set_label(label, compiler);
1794: return label;
1795: }
1796:
1797: SLJIT_API_FUNC_ATTRIBUTE struct sljit_jump* sljit_emit_jump(struct sljit_compiler *compiler, int type)
1798: {
1799: struct sljit_jump *jump;
1800: int cc;
1801:
1802: CHECK_ERROR_PTR();
1803: check_sljit_emit_jump(compiler, type);
1804:
1805: jump = (struct sljit_jump*)ensure_abuf(compiler, sizeof(struct sljit_jump));
1806: PTR_FAIL_IF(!jump);
1807: set_jump(jump, compiler, type & SLJIT_REWRITABLE_JUMP);
1808: type &= 0xff;
1809:
1810: /* In ARM, we don't need to touch the arguments. */
1811: PTR_FAIL_IF(emit_imm32_const(compiler, TMP_REG1, 0));
1812: if (type < SLJIT_JUMP) {
1813: jump->flags |= IS_CONDITIONAL;
1814: cc = get_cc(type);
1815: jump->flags |= cc << 8;
1816: PTR_FAIL_IF(push_inst16(compiler, IT | (cc << 4) | 0x8));
1817: }
1818:
1819: jump->addr = compiler->size;
1820: if (type <= SLJIT_JUMP)
1821: PTR_FAIL_IF(push_inst16(compiler, BX | RN3(TMP_REG1)));
1822: else {
1823: jump->flags |= IS_BL;
1824: PTR_FAIL_IF(push_inst16(compiler, BLX | RN3(TMP_REG1)));
1825: }
1826:
1827: return jump;
1828: }
1829:
1830: SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_ijump(struct sljit_compiler *compiler, int type, int src, sljit_w srcw)
1831: {
1832: struct sljit_jump *jump;
1833:
1834: CHECK_ERROR();
1835: check_sljit_emit_ijump(compiler, type, src, srcw);
1836: ADJUST_LOCAL_OFFSET(src, srcw);
1837:
1838: /* In ARM, we don't need to touch the arguments. */
1839: if (src & SLJIT_IMM) {
1840: jump = (struct sljit_jump*)ensure_abuf(compiler, sizeof(struct sljit_jump));
1841: FAIL_IF(!jump);
1842: set_jump(jump, compiler, JUMP_ADDR | ((type >= SLJIT_FAST_CALL) ? IS_BL : 0));
1843: jump->u.target = srcw;
1844:
1845: FAIL_IF(emit_imm32_const(compiler, TMP_REG1, 0));
1846: jump->addr = compiler->size;
1847: FAIL_IF(push_inst16(compiler, (type <= SLJIT_JUMP ? BX : BLX) | RN3(TMP_REG1)));
1848: }
1849: else {
1850: if (src >= SLJIT_TEMPORARY_REG1 && src <= SLJIT_NO_REGISTERS)
1851: return push_inst16(compiler, (type <= SLJIT_JUMP ? BX : BLX) | RN3(src));
1852:
1853: FAIL_IF(emit_op_mem(compiler, WORD_SIZE, type <= SLJIT_JUMP ? TMP_PC : TMP_REG1, src, srcw));
1854: if (type >= SLJIT_FAST_CALL)
1855: return push_inst16(compiler, BLX | RN3(TMP_REG1));
1856: }
1857: return SLJIT_SUCCESS;
1858: }
1859:
1860: SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_cond_value(struct sljit_compiler *compiler, int op, int dst, sljit_w dstw, int type)
1861: {
1862: int dst_r;
1863: sljit_uw cc;
1864:
1865: CHECK_ERROR();
1866: check_sljit_emit_cond_value(compiler, op, dst, dstw, type);
1867: ADJUST_LOCAL_OFFSET(dst, dstw);
1868:
1869: if (dst == SLJIT_UNUSED)
1870: return SLJIT_SUCCESS;
1871:
1872: cc = get_cc(type);
1873: if (GET_OPCODE(op) == SLJIT_OR && dst >= SLJIT_TEMPORARY_REG1 && dst <= SLJIT_NO_REGISTERS) {
1874: FAIL_IF(push_inst16(compiler, IT | (cc << 4) | 0x8));
1875: FAIL_IF(push_inst32(compiler, ORRI | RN4(dst) | RD4(dst) | 0x1));
1876: if (op & SLJIT_SET_E) {
1877: if (reg_map[dst] <= 7)
1878: return push_inst16(compiler, ORRS | RD3(dst) | RN3(dst));
1879: return push_inst32(compiler, ORR_W | SET_FLAGS | RD4(TMP_REG1) | RN4(dst) | RM4(dst));
1880: }
1881: return SLJIT_SUCCESS;
1882: }
1883:
1884: dst_r = TMP_REG2;
1885: if (op == SLJIT_MOV && dst >= SLJIT_TEMPORARY_REG1 && dst <= SLJIT_NO_REGISTERS && reg_map[dst] <= 7)
1886: dst_r = dst;
1887:
1888: FAIL_IF(push_inst16(compiler, IT | (cc << 4) | (((cc & 0x1) ^ 0x1) << 3) | 0x4));
1889: FAIL_IF(push_inst16(compiler, MOVSI | 0x1 | RDN3(dst_r)));
1890: FAIL_IF(push_inst16(compiler, MOVSI | 0x0 | RDN3(dst_r)));
1891:
1892: if (dst_r == TMP_REG2) {
1893: if (GET_OPCODE(op) == SLJIT_OR) {
1894: #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) || (defined SLJIT_DEBUG && SLJIT_DEBUG)
1895: compiler->skip_checks = 1;
1896: #endif
1897: return sljit_emit_op2(compiler, op, dst, dstw, dst, dstw, TMP_REG2, 0);
1898: }
1899: if (dst & SLJIT_MEM)
1900: return emit_op_mem(compiler, WORD_SIZE | STORE, TMP_REG2, dst, dstw);
1901: else
1902: return push_inst16(compiler, MOV | SET_REGS44(dst, TMP_REG2));
1903: }
1904:
1905: return SLJIT_SUCCESS;
1906: }
1907:
1908: SLJIT_API_FUNC_ATTRIBUTE struct sljit_const* sljit_emit_const(struct sljit_compiler *compiler, int dst, sljit_w dstw, sljit_w init_value)
1909: {
1910: struct sljit_const *const_;
1911: int dst_r;
1912:
1913: CHECK_ERROR_PTR();
1914: check_sljit_emit_const(compiler, dst, dstw, init_value);
1915: ADJUST_LOCAL_OFFSET(dst, dstw);
1916:
1917: const_ = (struct sljit_const*)ensure_abuf(compiler, sizeof(struct sljit_const));
1918: PTR_FAIL_IF(!const_);
1919: set_const(const_, compiler);
1920:
1921: dst_r = (dst >= SLJIT_TEMPORARY_REG1 && dst <= SLJIT_NO_REGISTERS) ? dst : TMP_REG1;
1922: PTR_FAIL_IF(emit_imm32_const(compiler, dst_r, init_value));
1923:
1924: if (dst & SLJIT_MEM)
1925: PTR_FAIL_IF(emit_op_mem(compiler, WORD_SIZE | STORE, dst_r, dst, dstw));
1926: return const_;
1927: }
1928:
1929: SLJIT_API_FUNC_ATTRIBUTE void sljit_set_jump_addr(sljit_uw addr, sljit_uw new_addr)
1930: {
1931: inline_set_jump_addr(addr, new_addr, 1);
1932: }
1933:
1934: SLJIT_API_FUNC_ATTRIBUTE void sljit_set_const(sljit_uw addr, sljit_w new_constant)
1935: {
1936: sljit_uh* inst = (sljit_uh*)addr;
1937: modify_imm32_const(inst, new_constant);
1938: SLJIT_CACHE_FLUSH(inst, inst + 3);
1939: }
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