4 # inssel-x86.brg: burg file for special x86 instructions
7 # Dietmar Maurer (dietmar@ximian.com)
8 # Paolo Molaro (lupus@ximian.com)
10 # (C) 2002 Ximian, Inc.
13 stmt: OP_START_HANDLER {
14 MONO_EMIT_NEW_STORE_MEMBASE (s, OP_STORE_MEMBASE_REG, s->spvar->inst_basereg, s->spvar->inst_offset, X86_ESP);
17 stmt: CEE_ENDFINALLY {
18 MONO_EMIT_NEW_LOAD_MEMBASE (s, X86_ESP, s->spvar->inst_basereg, s->spvar->inst_offset);
19 tree->opcode = CEE_RET;
20 mono_bblock_add_inst (s->cbb, tree);
23 stmt: OP_ENDFILTER (reg) {
24 MONO_EMIT_NEW_UNALU (s, OP_MOVE, X86_EAX, state->left->reg1);
25 MONO_EMIT_NEW_LOAD_MEMBASE (s, X86_ESP, s->spvar->inst_basereg, s->spvar->inst_offset);
26 tree->opcode = CEE_RET;
27 mono_bblock_add_inst (s->cbb, tree);
30 stmt: CEE_STIND_I8 (OP_REGVAR, lreg) {
31 /* this should only happen for methods returning a long */
32 MONO_EMIT_NEW_UNALU (s, OP_MOVE, X86_EAX, state->right->reg1);
33 MONO_EMIT_NEW_UNALU (s, OP_MOVE, X86_EDX, state->right->reg2);
36 lreg: OP_LNEG (lreg) "3" {
37 int tmpr = mono_regstate_next_int (s->rs);
38 MONO_EMIT_NEW_UNALU (s, CEE_NEG, state->reg1, state->left->reg1);
39 MONO_EMIT_BIALU_IMM (s, tree, OP_ADC_IMM, tmpr, state->left->reg2, 0);
40 MONO_EMIT_NEW_UNALU (s, CEE_NEG, state->reg2, tmpr);
43 freg: OP_LCONV_TO_R8 (lreg) {
44 MONO_EMIT_NEW_UNALU (s, OP_X86_PUSH, -1, state->left->reg2);
45 MONO_EMIT_NEW_UNALU (s, OP_X86_PUSH, -1, state->left->reg1);
46 tree->opcode = OP_X86_FP_LOAD_I8;
47 tree->inst_basereg = X86_ESP;
48 tree->inst_offset = 0;
49 mono_bblock_add_inst (s->cbb, tree);
50 MONO_EMIT_NEW_BIALU_IMM (s, OP_ADD_IMM, X86_ESP, X86_ESP, 8);
53 freg: OP_LCONV_TO_R4 (lreg) {
54 MONO_EMIT_NEW_UNALU (s, OP_X86_PUSH, -1, state->left->reg2);
55 MONO_EMIT_NEW_UNALU (s, OP_X86_PUSH, -1, state->left->reg1);
56 tree->opcode = OP_X86_FP_LOAD_I8;
57 tree->inst_basereg = X86_ESP;
58 tree->inst_offset = 0;
59 mono_bblock_add_inst (s->cbb, tree);
60 /* change precision */
61 MONO_EMIT_NEW_STORE_MEMBASE (s, OP_STORER4_MEMBASE_REG, X86_ESP, 0, state->reg1);
62 MONO_EMIT_NEW_LOAD_MEMBASE_OP (s, OP_LOADR4_MEMBASE, state->reg1, X86_ESP, 0);
63 MONO_EMIT_NEW_BIALU_IMM (s, OP_ADD_IMM, X86_ESP, X86_ESP, 8);
66 freg: CEE_CONV_R_UN (reg) {
67 MONO_EMIT_NEW_BIALU_IMM (s, OP_X86_PUSH_IMM, -1, -1, 0);
68 MONO_EMIT_NEW_UNALU (s, OP_X86_PUSH, -1, state->left->reg1);
69 tree->opcode = OP_X86_FP_LOAD_I8;
70 tree->inst_basereg = X86_ESP;
71 tree->inst_offset = 0;
72 mono_bblock_add_inst (s->cbb, tree);
73 MONO_EMIT_NEW_BIALU_IMM (s, OP_ADD_IMM, X86_ESP, X86_ESP, 8);
76 cflags: OP_COMPARE (CEE_LDIND_I4 (base), reg) {
77 tree->opcode = OP_X86_COMPARE_MEMBASE_REG;
78 tree->inst_basereg = state->left->left->tree->inst_basereg;
79 tree->inst_offset = state->left->left->tree->inst_offset;
80 tree->sreg2 = state->right->reg1;
81 mono_bblock_add_inst (s->cbb, tree);
84 cflags: OP_COMPARE (CEE_LDIND_I4 (base), OP_ICONST) {
85 tree->opcode = OP_X86_COMPARE_MEMBASE_IMM;
86 tree->inst_basereg = state->left->left->tree->inst_basereg;
87 tree->inst_offset = state->left->left->tree->inst_offset;
88 tree->inst_imm = state->right->tree->inst_c0;
89 mono_bblock_add_inst (s->cbb, tree);
92 cflags: OP_COMPARE (reg, CEE_LDIND_I4 (base)) {
93 tree->opcode = OP_X86_COMPARE_REG_MEMBASE;
94 tree->sreg2 = state->right->left->tree->inst_basereg;
95 tree->inst_offset = state->right->left->tree->inst_offset;
96 tree->sreg1 = state->left->reg1;
97 mono_bblock_add_inst (s->cbb, tree);
100 stmt: CEE_STIND_I1 (base, OP_CEQ (cflags)) {
101 tree->opcode = OP_X86_SETEQ_MEMBASE;
102 tree->inst_offset = state->left->tree->inst_offset;
103 tree->inst_basereg = state->left->tree->inst_basereg;
104 mono_bblock_add_inst (s->cbb, tree);
107 reg: OP_LOCALLOC (OP_ICONST) {
108 if (tree->flags & MONO_INST_INIT) {
109 /* microcoded in mini-x86.c */
110 tree->sreg1 = mono_regstate_next_int (s->rs);
111 MONO_EMIT_NEW_ICONST (s, tree->sreg1, state->left->tree->inst_c0);
112 mono_bblock_add_inst (s->cbb, tree);
114 MONO_EMIT_NEW_BIALU_IMM (s, OP_SUB_IMM, X86_ESP, X86_ESP, state->left->tree->inst_c0);
115 MONO_EMIT_UNALU (s, tree, OP_MOVE, state->reg1, X86_ESP);
119 reg: OP_LOCALLOC (reg) {
120 mono_bblock_add_inst (s->cbb, tree);
123 stmt: OP_SETRET (reg) {
124 tree->opcode = OP_MOVE;
125 tree->sreg1 = state->left->reg1;
126 tree->dreg = X86_EAX;
127 mono_bblock_add_inst (s->cbb, tree);
130 stmt: OP_SETRET (lreg) {
131 MONO_EMIT_NEW_UNALU (s, OP_MOVE, X86_EDX, state->left->reg2);
132 tree->opcode = OP_MOVE;
133 tree->sreg1 = state->left->reg1;
134 tree->dreg = X86_EAX;
135 mono_bblock_add_inst (s->cbb, tree);
138 stmt: OP_SETRET (CEE_LDIND_REF (OP_REGVAR)) {
139 tree->opcode = OP_MOVE;
140 tree->sreg1 = state->left->left->tree->dreg;
141 tree->dreg = X86_EAX;
142 mono_bblock_add_inst (s->cbb, tree);
145 stmt: OP_SETRET (freg) {
149 stmt: OP_SETRET (OP_ICONST) {
150 tree->opcode = OP_ICONST;
151 tree->inst_c0 = state->left->tree->inst_c0;
152 tree->dreg = X86_EAX;
153 mono_bblock_add_inst (s->cbb, tree);
156 stmt: OP_OUTARG (reg) {
157 tree->opcode = OP_X86_PUSH;
158 tree->sreg1 = state->left->reg1;
159 mono_bblock_add_inst (s->cbb, tree);
162 # we need to reduce this code duplication with some burg syntax extension
163 stmt: OP_OUTARG (CEE_LDIND_REF (OP_REGVAR)) {
164 tree->opcode = OP_X86_PUSH;
165 tree->sreg1 = state->left->left->tree->dreg;
166 mono_bblock_add_inst (s->cbb, tree);
169 stmt: OP_OUTARG (CEE_LDIND_I4 (OP_REGVAR)) {
170 tree->opcode = OP_X86_PUSH;
171 tree->sreg1 = state->left->left->tree->dreg;
172 mono_bblock_add_inst (s->cbb, tree);
175 stmt: OP_OUTARG (CEE_LDIND_U4 (OP_REGVAR)) {
176 tree->opcode = OP_X86_PUSH;
177 tree->sreg1 = state->left->left->tree->dreg;
178 mono_bblock_add_inst (s->cbb, tree);
181 stmt: OP_OUTARG (CEE_LDIND_I (OP_REGVAR)) {
182 tree->opcode = OP_X86_PUSH;
183 tree->sreg1 = state->left->left->tree->dreg;
184 mono_bblock_add_inst (s->cbb, tree);
187 stmt: OP_OUTARG (lreg) {
188 MONO_EMIT_NEW_UNALU (s, OP_X86_PUSH, -1, state->left->reg2);
189 tree->opcode = OP_X86_PUSH;
190 tree->sreg1 = state->left->reg1;
191 mono_bblock_add_inst (s->cbb, tree);
194 stmt: OP_OUTARG (CEE_LDIND_I8 (base)) {
196 ins = mono_mempool_alloc0 (s->mempool, sizeof (MonoInst));
197 ins->opcode = OP_X86_PUSH_MEMBASE;
198 ins->inst_basereg = state->left->left->tree->inst_basereg;
199 ins->inst_offset = state->left->left->tree->inst_offset + 4;
200 mono_bblock_add_inst (s->cbb, ins);
202 tree->opcode = OP_X86_PUSH_MEMBASE;
203 tree->inst_basereg = state->left->left->tree->inst_basereg;
204 tree->inst_offset = state->left->left->tree->inst_offset;
205 mono_bblock_add_inst (s->cbb, tree);
208 stmt: OP_OUTARG (OP_ICONST) {
209 tree->opcode = OP_X86_PUSH_IMM;
210 tree->inst_imm = state->left->tree->inst_c0;
211 mono_bblock_add_inst (s->cbb, tree);
214 stmt: OP_OUTARG (CEE_LDIND_I4 (base)) {
215 tree->opcode = OP_X86_PUSH_MEMBASE;
216 tree->inst_basereg = state->left->left->tree->inst_basereg;
217 tree->inst_offset = state->left->left->tree->inst_offset;
218 mono_bblock_add_inst (s->cbb, tree);
221 stmt: OP_OUTARG (CEE_LDIND_U4 (base)) {
222 tree->opcode = OP_X86_PUSH_MEMBASE;
223 tree->inst_basereg = state->left->left->tree->inst_basereg;
224 tree->inst_offset = state->left->left->tree->inst_offset;
225 mono_bblock_add_inst (s->cbb, tree);
228 stmt: OP_OUTARG (CEE_LDIND_I (base)) {
229 tree->opcode = OP_X86_PUSH_MEMBASE;
230 tree->inst_basereg = state->left->left->tree->inst_basereg;
231 tree->inst_offset = state->left->left->tree->inst_offset;
232 mono_bblock_add_inst (s->cbb, tree);
235 stmt: OP_OUTARG (CEE_LDIND_REF (base)) {
236 tree->opcode = OP_X86_PUSH_MEMBASE;
237 tree->inst_basereg = state->left->left->tree->inst_basereg;
238 tree->inst_offset = state->left->left->tree->inst_offset;
239 mono_bblock_add_inst (s->cbb, tree);
242 stmt: OP_OUTARG (CEE_LDIND_REF (OP_REGVAR)) {
243 tree->opcode = OP_X86_PUSH;
244 tree->sreg1 = state->left->left->tree->dreg;
245 mono_bblock_add_inst (s->cbb, tree);
248 stmt: OP_OUTARG (CEE_LDOBJ (reg)) {
249 tree->opcode = OP_X86_PUSH;
250 tree->sreg1 = state->left->reg1;
251 mono_bblock_add_inst (s->cbb, tree);
254 stmt: OP_OUTARG (freg) {
255 MONO_EMIT_NEW_BIALU_IMM (s, OP_SUB_IMM, X86_ESP, X86_ESP, 8);
256 tree->opcode = OP_STORER8_MEMBASE_REG;
257 tree->sreg1 = state->left->reg1;
258 tree->inst_destbasereg = X86_ESP;
259 tree->inst_offset = 0;
260 mono_bblock_add_inst (s->cbb, tree);
263 stmt: OP_OUTARG_R4 (freg) {
264 MONO_EMIT_NEW_BIALU_IMM (s, OP_SUB_IMM, X86_ESP, X86_ESP, 4);
265 tree->opcode = OP_STORER4_MEMBASE_REG;
266 tree->sreg1 = state->left->reg1;
267 tree->inst_destbasereg = X86_ESP;
268 tree->inst_offset = 0;
269 mono_bblock_add_inst (s->cbb, tree);
272 stmt: OP_OUTARG_R8 (freg) {
273 MONO_EMIT_NEW_BIALU_IMM (s, OP_SUB_IMM, X86_ESP, X86_ESP, 8);
274 tree->opcode = OP_STORER8_MEMBASE_REG;
275 tree->sreg1 = state->left->reg1;
276 tree->inst_destbasereg = X86_ESP;
277 tree->inst_offset = 0;
278 mono_bblock_add_inst (s->cbb, tree);
281 stmt: OP_OUTARG_VT (CEE_LDOBJ (base)) {
282 MonoInst *vt = state->left->left->tree;
283 //g_print ("vt size: %d at R%d + %d\n", tree->inst_imm, vt->inst_basereg, vt->inst_offset);
288 if (tree->inst_imm <= 4) {
289 tree->opcode = OP_X86_PUSH_MEMBASE;
290 tree->inst_basereg = vt->inst_basereg;
291 tree->inst_offset = vt->inst_offset;
292 mono_bblock_add_inst (s->cbb, tree);
293 } else if (tree->inst_imm <= 20) {
294 int sz = tree->inst_imm;
297 MONO_EMIT_NEW_BIALU_IMM (s, OP_SUB_IMM, X86_ESP, X86_ESP, sz);
298 mini_emit_memcpy (s, X86_ESP, 0, vt->inst_basereg, vt->inst_offset, tree->inst_imm, 0);
300 tree->opcode = OP_X86_PUSH_OBJ;
301 tree->inst_basereg = vt->inst_basereg;
302 tree->inst_offset = vt->inst_offset;
303 mono_bblock_add_inst (s->cbb, tree);
307 stmt: OP_OUTARG_VT (OP_ICONST) {
308 tree->opcode = OP_X86_PUSH_IMM;
309 tree->inst_imm = state->left->tree->inst_c0;
310 mono_bblock_add_inst (s->cbb, tree);
313 reg: OP_LDADDR (OP_REGOFFSET) "1" {
314 if (state->left->tree->inst_offset) {
315 tree->opcode = OP_X86_LEA_MEMBASE;
316 tree->sreg1 = state->left->tree->inst_basereg;
317 tree->inst_imm = state->left->tree->inst_offset;
318 tree->dreg = state->reg1;
320 tree->opcode = OP_MOVE;
321 tree->sreg1 = state->left->tree->inst_basereg;
322 tree->dreg = state->reg1;
324 mono_bblock_add_inst (s->cbb, tree);
327 reg: CEE_LDOBJ (OP_REGOFFSET) "1" {
328 if (state->left->tree->inst_offset) {
329 tree->opcode = OP_X86_LEA_MEMBASE;
330 tree->sreg1 = state->left->tree->inst_basereg;
331 tree->inst_imm = state->left->tree->inst_offset;
332 tree->dreg = state->reg1;
334 tree->opcode = OP_MOVE;
335 tree->sreg1 = state->left->tree->inst_basereg;
336 tree->dreg = state->reg1;
338 mono_bblock_add_inst (s->cbb, tree);
341 reg: CEE_LDELEMA (reg, reg) "15" {
342 int length_reg = mono_regstate_next_int (s->rs);
343 guint32 size = mono_class_array_element_size (tree->klass);
345 MONO_EMIT_NEW_LOAD_MEMBASE_OP (s, OP_LOADI4_MEMBASE, length_reg,
346 state->left->reg1, G_STRUCT_OFFSET (MonoArray, max_length));
347 MONO_EMIT_NEW_BIALU (s, OP_COMPARE, -1, length_reg, state->right->reg1);
348 MONO_EMIT_NEW_COND_EXC (s, LE_UN, "IndexOutOfRangeException");
350 if (size == 1 || size == 2 || size == 4 || size == 8) {
351 static const int fast_log2 [] = { 1, 0, 1, -1, 2, -1, -1, -1, 3 };
352 tree->opcode = OP_X86_LEA;
353 tree->dreg = state->reg1;
354 tree->sreg1 = state->left->reg1;
355 tree->sreg2 = state->right->reg1;
356 tree->inst_imm = G_STRUCT_OFFSET (MonoArray, vector);
357 tree->unused = fast_log2 [size];
358 mono_bblock_add_inst (s->cbb, tree);
360 int mult_reg = mono_regstate_next_int (s->rs);
361 int add_reg = mono_regstate_next_int (s->rs);
362 MONO_EMIT_NEW_BIALU_IMM (s, OP_MUL_IMM, mult_reg, state->right->reg1, size);
363 MONO_EMIT_NEW_BIALU (s, CEE_ADD, add_reg, mult_reg, state->left->reg1);
364 MONO_EMIT_NEW_BIALU_IMM (s, OP_ADD_IMM, state->reg1, add_reg, G_STRUCT_OFFSET (MonoArray, vector));
368 stmt: CEE_STIND_R8 (OP_REGVAR, freg) {
369 /* nothing to do: the value is already on the FP stack */
372 stmt: CEE_STIND_I4 (base, CEE_ADD (CEE_LDIND_I4 (base), OP_ICONST)) {
373 int con = state->right->right->tree->inst_c0;
376 tree->opcode = OP_X86_INC_MEMBASE;
378 tree->opcode = OP_X86_ADD_MEMBASE_IMM;
379 tree->inst_imm = con;
382 tree->inst_basereg = state->left->tree->inst_basereg;
383 tree->inst_offset = state->left->tree->inst_offset;
384 mono_bblock_add_inst (s->cbb, tree);
386 MBTREE_TYPE *t1 = state->right->left->left->tree;
387 MBTREE_TYPE *t2 = state->left->tree;
388 MBCOND (t1->inst_basereg == t2->inst_basereg &&
389 t1->inst_offset == t2->inst_offset);
393 stmt: CEE_STIND_I4 (base, CEE_SUB (CEE_LDIND_I4 (base), OP_ICONST)) {
394 int con = state->right->right->tree->inst_c0;
397 tree->opcode = OP_X86_DEC_MEMBASE;
399 tree->opcode = OP_X86_SUB_MEMBASE_IMM;
400 tree->inst_imm = con;
403 tree->inst_basereg = state->left->tree->inst_basereg;
404 tree->inst_offset = state->left->tree->inst_offset;
405 mono_bblock_add_inst (s->cbb, tree);
407 MBTREE_TYPE *t1 = state->right->left->left->tree;
408 MBTREE_TYPE *t2 = state->left->tree;
409 MBCOND (t1->inst_basereg == t2->inst_basereg &&
410 t1->inst_offset == t2->inst_offset);
415 # this rules is incorrect, it needs to do an indirect inc (inc_membase)
416 #stmt: CEE_STIND_I4 (reg, CEE_ADD (reg, OP_ICONST)) {
417 # tree->opcode = OP_X86_INC_REG;
418 # tree->dreg = state->left->reg1;
419 # mono_bblock_add_inst (s->cbb, tree);
421 # MBState *s1 = state->left;
422 # MBState *s2 = state->right->left;
423 # int con = state->right->right->tree->inst_c0;
424 # MBCOND (con == 1 && s1->reg1 == s2->reg1);
428 stmt: CEE_STIND_I4 (OP_REGVAR, CEE_SUB (CEE_LDIND_I4 (OP_REGVAR), OP_ICONST)) {
429 int con = state->right->right->tree->inst_c0;
430 int dreg = state->left->tree->dreg;
431 int sreg = state->right->left->left->tree->dreg;
435 MONO_EMIT_NEW_UNALU (s, OP_MOVE, dreg, sreg);
436 tree->opcode = OP_X86_DEC_REG;
437 tree->dreg = tree->sreg1 = dreg;
438 } else if (con == -1) {
440 MONO_EMIT_NEW_UNALU (s, OP_MOVE, dreg, sreg);
441 tree->opcode = OP_X86_INC_REG;
442 tree->dreg = tree->sreg1 = dreg;
444 tree->opcode = OP_SUB_IMM;
445 tree->inst_imm = con;
449 mono_bblock_add_inst (s->cbb, tree);
452 stmt: CEE_STIND_I4 (OP_REGVAR, CEE_ADD (CEE_LDIND_I4 (OP_REGVAR), OP_ICONST)) {
453 int con = state->right->right->tree->inst_c0;
454 int dreg = state->left->tree->dreg;
455 int sreg = state->right->left->left->tree->dreg;
459 MONO_EMIT_NEW_UNALU (s, OP_MOVE, dreg, sreg);
460 tree->opcode = OP_X86_INC_REG;
461 tree->dreg = tree->sreg1 = dreg;
462 } else if (con == -1) {
464 MONO_EMIT_NEW_UNALU (s, OP_MOVE, dreg, sreg);
465 tree->opcode = OP_X86_DEC_REG;
466 tree->dreg = tree->sreg1 = dreg;
468 tree->opcode = OP_ADD_IMM;
469 tree->inst_imm = con;
473 mono_bblock_add_inst (s->cbb, tree);
476 reg: CEE_LDIND_I2 (OP_REGVAR) {
477 MONO_EMIT_UNALU (s, tree, OP_SEXT_I2, state->reg1, state->left->tree->dreg);
480 # on x86, fp compare overwrites EAX, so we must
481 # either improve the local register allocator or
482 # emit coarse opcodes which saves EAX for us.
484 reg: OP_CEQ (OP_COMPARE (freg, freg)) {
485 MONO_EMIT_BIALU (s, tree, OP_FCEQ, state->reg1, state->left->left->reg1,
486 state->left->right->reg1);
489 reg: OP_CLT (OP_COMPARE (freg, freg)) {
490 MONO_EMIT_BIALU (s, tree, OP_FCLT, state->reg1, state->left->left->reg1,
491 state->left->right->reg1);
494 reg: OP_CLT_UN (OP_COMPARE (freg, freg)) {
495 MONO_EMIT_BIALU (s, tree, OP_FCLT_UN, state->reg1, state->left->left->reg1,
496 state->left->right->reg1);
499 reg: OP_CGT (OP_COMPARE (freg, freg)) {
500 MONO_EMIT_BIALU (s, tree, OP_FCGT, state->reg1, state->left->left->reg1,
501 state->left->right->reg1);
504 reg: OP_CGT_UN (OP_COMPARE (freg, freg)) {
505 MONO_EMIT_BIALU (s, tree, OP_FCGT_UN, state->reg1, state->left->left->reg1,
506 state->left->right->reg1);
509 # fpcflags overwrites EAX, but this does not matter for statements
510 # because we are the last operation in the tree.
512 stmt: CEE_BNE_UN (fpcflags) {
513 tree->opcode = OP_FBNE_UN;
514 mono_bblock_add_inst (s->cbb, tree);
517 stmt: CEE_BEQ (fpcflags) {
518 tree->opcode = OP_FBEQ;
519 mono_bblock_add_inst (s->cbb, tree);
522 stmt: CEE_BLT (fpcflags) {
523 tree->opcode = OP_FBLT;
524 mono_bblock_add_inst (s->cbb, tree);
527 stmt: CEE_BLT_UN (fpcflags) {
528 tree->opcode = OP_FBLT_UN;
529 mono_bblock_add_inst (s->cbb, tree);
532 stmt: CEE_BGT (fpcflags) {
533 tree->opcode = OP_FBGT;
534 mono_bblock_add_inst (s->cbb, tree);
537 stmt: CEE_BGT_UN (fpcflags) {
538 tree->opcode = OP_FBGT_UN;
539 mono_bblock_add_inst (s->cbb, tree);
542 stmt: CEE_BGE (fpcflags) {
543 tree->opcode = OP_FBGE;
544 mono_bblock_add_inst (s->cbb, tree);
547 stmt: CEE_BGE_UN (fpcflags) {
548 tree->opcode = OP_FBGE_UN;
549 mono_bblock_add_inst (s->cbb, tree);
552 stmt: CEE_BLE (fpcflags) {
553 tree->opcode = OP_FBLE;
554 mono_bblock_add_inst (s->cbb, tree);
557 stmt: CEE_BLE_UN (fpcflags) {
558 tree->opcode = OP_FBLE_UN;
559 mono_bblock_add_inst (s->cbb, tree);
562 stmt: CEE_POP (freg) "0" {
563 /* we need to pop the value from the x86 FP stack */
564 MONO_EMIT_UNALU (s, tree, OP_X86_FPOP, -1, state->left->reg1);