memory: add early bail out from cpu_physical_memory_set_dirty_range
[qemu/ar7.git] / target-s390x / fpu_helper.c
blob1c7f67354286ff1fd6290bc85279c9bd868a94d8
1 /*
2 * S/390 FPU helper routines
4 * Copyright (c) 2009 Ulrich Hecht
5 * Copyright (c) 2009 Alexander Graf
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
21 #include "qemu/osdep.h"
22 #include "cpu.h"
23 #include "exec/cpu_ldst.h"
24 #include "exec/helper-proto.h"
26 /* #define DEBUG_HELPER */
27 #ifdef DEBUG_HELPER
28 #define HELPER_LOG(x...) qemu_log(x)
29 #else
30 #define HELPER_LOG(x...)
31 #endif
33 #define RET128(F) (env->retxl = F.low, F.high)
35 #define convert_bit(mask, from, to) \
36 (to < from \
37 ? (mask / (from / to)) & to \
38 : (mask & from) * (to / from))
40 static void ieee_exception(CPUS390XState *env, uint32_t dxc, uintptr_t retaddr)
42 /* Install the DXC code. */
43 env->fpc = (env->fpc & ~0xff00) | (dxc << 8);
44 /* Trap. */
45 runtime_exception(env, PGM_DATA, retaddr);
48 /* Should be called after any operation that may raise IEEE exceptions. */
49 static void handle_exceptions(CPUS390XState *env, uintptr_t retaddr)
51 unsigned s390_exc, qemu_exc;
53 /* Get the exceptions raised by the current operation. Reset the
54 fpu_status contents so that the next operation has a clean slate. */
55 qemu_exc = env->fpu_status.float_exception_flags;
56 if (qemu_exc == 0) {
57 return;
59 env->fpu_status.float_exception_flags = 0;
61 /* Convert softfloat exception bits to s390 exception bits. */
62 s390_exc = 0;
63 s390_exc |= convert_bit(qemu_exc, float_flag_invalid, 0x80);
64 s390_exc |= convert_bit(qemu_exc, float_flag_divbyzero, 0x40);
65 s390_exc |= convert_bit(qemu_exc, float_flag_overflow, 0x20);
66 s390_exc |= convert_bit(qemu_exc, float_flag_underflow, 0x10);
67 s390_exc |= convert_bit(qemu_exc, float_flag_inexact, 0x08);
69 /* Install the exceptions that we raised. */
70 env->fpc |= s390_exc << 16;
72 /* Send signals for enabled exceptions. */
73 s390_exc &= env->fpc >> 24;
74 if (s390_exc) {
75 ieee_exception(env, s390_exc, retaddr);
79 static inline int float_comp_to_cc(CPUS390XState *env, int float_compare)
81 S390CPU *cpu = s390_env_get_cpu(env);
83 switch (float_compare) {
84 case float_relation_equal:
85 return 0;
86 case float_relation_less:
87 return 1;
88 case float_relation_greater:
89 return 2;
90 case float_relation_unordered:
91 return 3;
92 default:
93 cpu_abort(CPU(cpu), "unknown return value for float compare\n");
97 /* condition codes for unary FP ops */
98 uint32_t set_cc_nz_f32(float32 v)
100 if (float32_is_any_nan(v)) {
101 return 3;
102 } else if (float32_is_zero(v)) {
103 return 0;
104 } else if (float32_is_neg(v)) {
105 return 1;
106 } else {
107 return 2;
111 uint32_t set_cc_nz_f64(float64 v)
113 if (float64_is_any_nan(v)) {
114 return 3;
115 } else if (float64_is_zero(v)) {
116 return 0;
117 } else if (float64_is_neg(v)) {
118 return 1;
119 } else {
120 return 2;
124 uint32_t set_cc_nz_f128(float128 v)
126 if (float128_is_any_nan(v)) {
127 return 3;
128 } else if (float128_is_zero(v)) {
129 return 0;
130 } else if (float128_is_neg(v)) {
131 return 1;
132 } else {
133 return 2;
137 /* 32-bit FP addition */
138 uint64_t HELPER(aeb)(CPUS390XState *env, uint64_t f1, uint64_t f2)
140 float32 ret = float32_add(f1, f2, &env->fpu_status);
141 handle_exceptions(env, GETPC());
142 return ret;
145 /* 64-bit FP addition */
146 uint64_t HELPER(adb)(CPUS390XState *env, uint64_t f1, uint64_t f2)
148 float64 ret = float64_add(f1, f2, &env->fpu_status);
149 handle_exceptions(env, GETPC());
150 return ret;
153 /* 128-bit FP addition */
154 uint64_t HELPER(axb)(CPUS390XState *env, uint64_t ah, uint64_t al,
155 uint64_t bh, uint64_t bl)
157 float128 ret = float128_add(make_float128(ah, al),
158 make_float128(bh, bl),
159 &env->fpu_status);
160 handle_exceptions(env, GETPC());
161 return RET128(ret);
164 /* 32-bit FP subtraction */
165 uint64_t HELPER(seb)(CPUS390XState *env, uint64_t f1, uint64_t f2)
167 float32 ret = float32_sub(f1, f2, &env->fpu_status);
168 handle_exceptions(env, GETPC());
169 return ret;
172 /* 64-bit FP subtraction */
173 uint64_t HELPER(sdb)(CPUS390XState *env, uint64_t f1, uint64_t f2)
175 float64 ret = float64_sub(f1, f2, &env->fpu_status);
176 handle_exceptions(env, GETPC());
177 return ret;
180 /* 128-bit FP subtraction */
181 uint64_t HELPER(sxb)(CPUS390XState *env, uint64_t ah, uint64_t al,
182 uint64_t bh, uint64_t bl)
184 float128 ret = float128_sub(make_float128(ah, al),
185 make_float128(bh, bl),
186 &env->fpu_status);
187 handle_exceptions(env, GETPC());
188 return RET128(ret);
191 /* 32-bit FP division */
192 uint64_t HELPER(deb)(CPUS390XState *env, uint64_t f1, uint64_t f2)
194 float32 ret = float32_div(f1, f2, &env->fpu_status);
195 handle_exceptions(env, GETPC());
196 return ret;
199 /* 64-bit FP division */
200 uint64_t HELPER(ddb)(CPUS390XState *env, uint64_t f1, uint64_t f2)
202 float64 ret = float64_div(f1, f2, &env->fpu_status);
203 handle_exceptions(env, GETPC());
204 return ret;
207 /* 128-bit FP division */
208 uint64_t HELPER(dxb)(CPUS390XState *env, uint64_t ah, uint64_t al,
209 uint64_t bh, uint64_t bl)
211 float128 ret = float128_div(make_float128(ah, al),
212 make_float128(bh, bl),
213 &env->fpu_status);
214 handle_exceptions(env, GETPC());
215 return RET128(ret);
218 /* 32-bit FP multiplication */
219 uint64_t HELPER(meeb)(CPUS390XState *env, uint64_t f1, uint64_t f2)
221 float32 ret = float32_mul(f1, f2, &env->fpu_status);
222 handle_exceptions(env, GETPC());
223 return ret;
226 /* 64-bit FP multiplication */
227 uint64_t HELPER(mdb)(CPUS390XState *env, uint64_t f1, uint64_t f2)
229 float64 ret = float64_mul(f1, f2, &env->fpu_status);
230 handle_exceptions(env, GETPC());
231 return ret;
234 /* 64/32-bit FP multiplication */
235 uint64_t HELPER(mdeb)(CPUS390XState *env, uint64_t f1, uint64_t f2)
237 float64 ret = float32_to_float64(f2, &env->fpu_status);
238 ret = float64_mul(f1, ret, &env->fpu_status);
239 handle_exceptions(env, GETPC());
240 return ret;
243 /* 128-bit FP multiplication */
244 uint64_t HELPER(mxb)(CPUS390XState *env, uint64_t ah, uint64_t al,
245 uint64_t bh, uint64_t bl)
247 float128 ret = float128_mul(make_float128(ah, al),
248 make_float128(bh, bl),
249 &env->fpu_status);
250 handle_exceptions(env, GETPC());
251 return RET128(ret);
254 /* 128/64-bit FP multiplication */
255 uint64_t HELPER(mxdb)(CPUS390XState *env, uint64_t ah, uint64_t al,
256 uint64_t f2)
258 float128 ret = float64_to_float128(f2, &env->fpu_status);
259 ret = float128_mul(make_float128(ah, al), ret, &env->fpu_status);
260 handle_exceptions(env, GETPC());
261 return RET128(ret);
264 /* convert 32-bit float to 64-bit float */
265 uint64_t HELPER(ldeb)(CPUS390XState *env, uint64_t f2)
267 float64 ret = float32_to_float64(f2, &env->fpu_status);
268 handle_exceptions(env, GETPC());
269 return float64_maybe_silence_nan(ret);
272 /* convert 128-bit float to 64-bit float */
273 uint64_t HELPER(ldxb)(CPUS390XState *env, uint64_t ah, uint64_t al)
275 float64 ret = float128_to_float64(make_float128(ah, al), &env->fpu_status);
276 handle_exceptions(env, GETPC());
277 return float64_maybe_silence_nan(ret);
280 /* convert 64-bit float to 128-bit float */
281 uint64_t HELPER(lxdb)(CPUS390XState *env, uint64_t f2)
283 float128 ret = float64_to_float128(f2, &env->fpu_status);
284 handle_exceptions(env, GETPC());
285 return RET128(float128_maybe_silence_nan(ret));
288 /* convert 32-bit float to 128-bit float */
289 uint64_t HELPER(lxeb)(CPUS390XState *env, uint64_t f2)
291 float128 ret = float32_to_float128(f2, &env->fpu_status);
292 handle_exceptions(env, GETPC());
293 return RET128(float128_maybe_silence_nan(ret));
296 /* convert 64-bit float to 32-bit float */
297 uint64_t HELPER(ledb)(CPUS390XState *env, uint64_t f2)
299 float32 ret = float64_to_float32(f2, &env->fpu_status);
300 handle_exceptions(env, GETPC());
301 return float32_maybe_silence_nan(ret);
304 /* convert 128-bit float to 32-bit float */
305 uint64_t HELPER(lexb)(CPUS390XState *env, uint64_t ah, uint64_t al)
307 float32 ret = float128_to_float32(make_float128(ah, al), &env->fpu_status);
308 handle_exceptions(env, GETPC());
309 return float32_maybe_silence_nan(ret);
312 /* 32-bit FP compare */
313 uint32_t HELPER(ceb)(CPUS390XState *env, uint64_t f1, uint64_t f2)
315 int cmp = float32_compare_quiet(f1, f2, &env->fpu_status);
316 handle_exceptions(env, GETPC());
317 return float_comp_to_cc(env, cmp);
320 /* 64-bit FP compare */
321 uint32_t HELPER(cdb)(CPUS390XState *env, uint64_t f1, uint64_t f2)
323 int cmp = float64_compare_quiet(f1, f2, &env->fpu_status);
324 handle_exceptions(env, GETPC());
325 return float_comp_to_cc(env, cmp);
328 /* 128-bit FP compare */
329 uint32_t HELPER(cxb)(CPUS390XState *env, uint64_t ah, uint64_t al,
330 uint64_t bh, uint64_t bl)
332 int cmp = float128_compare_quiet(make_float128(ah, al),
333 make_float128(bh, bl),
334 &env->fpu_status);
335 handle_exceptions(env, GETPC());
336 return float_comp_to_cc(env, cmp);
339 static int swap_round_mode(CPUS390XState *env, int m3)
341 int ret = env->fpu_status.float_rounding_mode;
342 switch (m3) {
343 case 0:
344 /* current mode */
345 break;
346 case 1:
347 /* biased round no nearest */
348 case 4:
349 /* round to nearest */
350 set_float_rounding_mode(float_round_nearest_even, &env->fpu_status);
351 break;
352 case 5:
353 /* round to zero */
354 set_float_rounding_mode(float_round_to_zero, &env->fpu_status);
355 break;
356 case 6:
357 /* round to +inf */
358 set_float_rounding_mode(float_round_up, &env->fpu_status);
359 break;
360 case 7:
361 /* round to -inf */
362 set_float_rounding_mode(float_round_down, &env->fpu_status);
363 break;
365 return ret;
368 /* convert 64-bit int to 32-bit float */
369 uint64_t HELPER(cegb)(CPUS390XState *env, int64_t v2, uint32_t m3)
371 int hold = swap_round_mode(env, m3);
372 float32 ret = int64_to_float32(v2, &env->fpu_status);
373 set_float_rounding_mode(hold, &env->fpu_status);
374 handle_exceptions(env, GETPC());
375 return ret;
378 /* convert 64-bit int to 64-bit float */
379 uint64_t HELPER(cdgb)(CPUS390XState *env, int64_t v2, uint32_t m3)
381 int hold = swap_round_mode(env, m3);
382 float64 ret = int64_to_float64(v2, &env->fpu_status);
383 set_float_rounding_mode(hold, &env->fpu_status);
384 handle_exceptions(env, GETPC());
385 return ret;
388 /* convert 64-bit int to 128-bit float */
389 uint64_t HELPER(cxgb)(CPUS390XState *env, int64_t v2, uint32_t m3)
391 int hold = swap_round_mode(env, m3);
392 float128 ret = int64_to_float128(v2, &env->fpu_status);
393 set_float_rounding_mode(hold, &env->fpu_status);
394 handle_exceptions(env, GETPC());
395 return RET128(ret);
398 /* convert 64-bit uint to 32-bit float */
399 uint64_t HELPER(celgb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
401 int hold = swap_round_mode(env, m3);
402 float32 ret = uint64_to_float32(v2, &env->fpu_status);
403 set_float_rounding_mode(hold, &env->fpu_status);
404 handle_exceptions(env, GETPC());
405 return ret;
408 /* convert 64-bit uint to 64-bit float */
409 uint64_t HELPER(cdlgb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
411 int hold = swap_round_mode(env, m3);
412 float64 ret = uint64_to_float64(v2, &env->fpu_status);
413 set_float_rounding_mode(hold, &env->fpu_status);
414 handle_exceptions(env, GETPC());
415 return ret;
418 /* convert 64-bit uint to 128-bit float */
419 uint64_t HELPER(cxlgb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
421 int hold = swap_round_mode(env, m3);
422 float128 ret = uint64_to_float128(v2, &env->fpu_status);
423 set_float_rounding_mode(hold, &env->fpu_status);
424 handle_exceptions(env, GETPC());
425 return RET128(ret);
428 /* convert 32-bit float to 64-bit int */
429 uint64_t HELPER(cgeb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
431 int hold = swap_round_mode(env, m3);
432 int64_t ret = float32_to_int64(v2, &env->fpu_status);
433 set_float_rounding_mode(hold, &env->fpu_status);
434 handle_exceptions(env, GETPC());
435 return ret;
438 /* convert 64-bit float to 64-bit int */
439 uint64_t HELPER(cgdb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
441 int hold = swap_round_mode(env, m3);
442 int64_t ret = float64_to_int64(v2, &env->fpu_status);
443 set_float_rounding_mode(hold, &env->fpu_status);
444 handle_exceptions(env, GETPC());
445 return ret;
448 /* convert 128-bit float to 64-bit int */
449 uint64_t HELPER(cgxb)(CPUS390XState *env, uint64_t h, uint64_t l, uint32_t m3)
451 int hold = swap_round_mode(env, m3);
452 float128 v2 = make_float128(h, l);
453 int64_t ret = float128_to_int64(v2, &env->fpu_status);
454 set_float_rounding_mode(hold, &env->fpu_status);
455 handle_exceptions(env, GETPC());
456 return ret;
459 /* convert 32-bit float to 32-bit int */
460 uint64_t HELPER(cfeb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
462 int hold = swap_round_mode(env, m3);
463 int32_t ret = float32_to_int32(v2, &env->fpu_status);
464 set_float_rounding_mode(hold, &env->fpu_status);
465 handle_exceptions(env, GETPC());
466 return ret;
469 /* convert 64-bit float to 32-bit int */
470 uint64_t HELPER(cfdb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
472 int hold = swap_round_mode(env, m3);
473 int32_t ret = float64_to_int32(v2, &env->fpu_status);
474 set_float_rounding_mode(hold, &env->fpu_status);
475 handle_exceptions(env, GETPC());
476 return ret;
479 /* convert 128-bit float to 32-bit int */
480 uint64_t HELPER(cfxb)(CPUS390XState *env, uint64_t h, uint64_t l, uint32_t m3)
482 int hold = swap_round_mode(env, m3);
483 float128 v2 = make_float128(h, l);
484 int32_t ret = float128_to_int32(v2, &env->fpu_status);
485 set_float_rounding_mode(hold, &env->fpu_status);
486 handle_exceptions(env, GETPC());
487 return ret;
490 /* convert 32-bit float to 64-bit uint */
491 uint64_t HELPER(clgeb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
493 int hold = swap_round_mode(env, m3);
494 uint64_t ret;
495 v2 = float32_to_float64(v2, &env->fpu_status);
496 ret = float64_to_uint64(v2, &env->fpu_status);
497 set_float_rounding_mode(hold, &env->fpu_status);
498 handle_exceptions(env, GETPC());
499 return ret;
502 /* convert 64-bit float to 64-bit uint */
503 uint64_t HELPER(clgdb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
505 int hold = swap_round_mode(env, m3);
506 uint64_t ret = float64_to_uint64(v2, &env->fpu_status);
507 set_float_rounding_mode(hold, &env->fpu_status);
508 handle_exceptions(env, GETPC());
509 return ret;
512 /* convert 128-bit float to 64-bit uint */
513 uint64_t HELPER(clgxb)(CPUS390XState *env, uint64_t h, uint64_t l, uint32_t m3)
515 int hold = swap_round_mode(env, m3);
516 float128 v2 = make_float128(h, l);
517 /* ??? Not 100% correct. */
518 uint64_t ret = float128_to_int64(v2, &env->fpu_status);
519 set_float_rounding_mode(hold, &env->fpu_status);
520 handle_exceptions(env, GETPC());
521 return ret;
524 /* convert 32-bit float to 32-bit uint */
525 uint64_t HELPER(clfeb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
527 int hold = swap_round_mode(env, m3);
528 uint32_t ret = float32_to_uint32(v2, &env->fpu_status);
529 set_float_rounding_mode(hold, &env->fpu_status);
530 handle_exceptions(env, GETPC());
531 return ret;
534 /* convert 64-bit float to 32-bit uint */
535 uint64_t HELPER(clfdb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
537 int hold = swap_round_mode(env, m3);
538 uint32_t ret = float64_to_uint32(v2, &env->fpu_status);
539 set_float_rounding_mode(hold, &env->fpu_status);
540 handle_exceptions(env, GETPC());
541 return ret;
544 /* convert 128-bit float to 32-bit uint */
545 uint64_t HELPER(clfxb)(CPUS390XState *env, uint64_t h, uint64_t l, uint32_t m3)
547 int hold = swap_round_mode(env, m3);
548 float128 v2 = make_float128(h, l);
549 /* Not 100% correct. */
550 uint32_t ret = float128_to_int64(v2, &env->fpu_status);
551 set_float_rounding_mode(hold, &env->fpu_status);
552 handle_exceptions(env, GETPC());
553 return ret;
556 /* round to integer 32-bit */
557 uint64_t HELPER(fieb)(CPUS390XState *env, uint64_t f2, uint32_t m3)
559 int hold = swap_round_mode(env, m3);
560 float32 ret = float32_round_to_int(f2, &env->fpu_status);
561 set_float_rounding_mode(hold, &env->fpu_status);
562 handle_exceptions(env, GETPC());
563 return ret;
566 /* round to integer 64-bit */
567 uint64_t HELPER(fidb)(CPUS390XState *env, uint64_t f2, uint32_t m3)
569 int hold = swap_round_mode(env, m3);
570 float64 ret = float64_round_to_int(f2, &env->fpu_status);
571 set_float_rounding_mode(hold, &env->fpu_status);
572 handle_exceptions(env, GETPC());
573 return ret;
576 /* round to integer 128-bit */
577 uint64_t HELPER(fixb)(CPUS390XState *env, uint64_t ah, uint64_t al, uint32_t m3)
579 int hold = swap_round_mode(env, m3);
580 float128 ret = float128_round_to_int(make_float128(ah, al),
581 &env->fpu_status);
582 set_float_rounding_mode(hold, &env->fpu_status);
583 handle_exceptions(env, GETPC());
584 return RET128(ret);
587 /* 32-bit FP multiply and add */
588 uint64_t HELPER(maeb)(CPUS390XState *env, uint64_t f1,
589 uint64_t f2, uint64_t f3)
591 float32 ret = float32_muladd(f2, f3, f1, 0, &env->fpu_status);
592 handle_exceptions(env, GETPC());
593 return ret;
596 /* 64-bit FP multiply and add */
597 uint64_t HELPER(madb)(CPUS390XState *env, uint64_t f1,
598 uint64_t f2, uint64_t f3)
600 float64 ret = float64_muladd(f2, f3, f1, 0, &env->fpu_status);
601 handle_exceptions(env, GETPC());
602 return ret;
605 /* 32-bit FP multiply and subtract */
606 uint64_t HELPER(mseb)(CPUS390XState *env, uint64_t f1,
607 uint64_t f2, uint64_t f3)
609 float32 ret = float32_muladd(f2, f3, f1, float_muladd_negate_c,
610 &env->fpu_status);
611 handle_exceptions(env, GETPC());
612 return ret;
615 /* 64-bit FP multiply and subtract */
616 uint64_t HELPER(msdb)(CPUS390XState *env, uint64_t f1,
617 uint64_t f2, uint64_t f3)
619 float64 ret = float64_muladd(f2, f3, f1, float_muladd_negate_c,
620 &env->fpu_status);
621 handle_exceptions(env, GETPC());
622 return ret;
625 /* test data class 32-bit */
626 uint32_t HELPER(tceb)(uint64_t f1, uint64_t m2)
628 float32 v1 = f1;
629 int neg = float32_is_neg(v1);
630 uint32_t cc = 0;
632 if ((float32_is_zero(v1) && (m2 & (1 << (11-neg)))) ||
633 (float32_is_infinity(v1) && (m2 & (1 << (5-neg)))) ||
634 (float32_is_any_nan(v1) && (m2 & (1 << (3-neg)))) ||
635 (float32_is_signaling_nan(v1) && (m2 & (1 << (1-neg))))) {
636 cc = 1;
637 } else if (m2 & (1 << (9-neg))) {
638 /* assume normalized number */
639 cc = 1;
641 /* FIXME: denormalized? */
642 return cc;
645 /* test data class 64-bit */
646 uint32_t HELPER(tcdb)(uint64_t v1, uint64_t m2)
648 int neg = float64_is_neg(v1);
649 uint32_t cc = 0;
651 if ((float64_is_zero(v1) && (m2 & (1 << (11-neg)))) ||
652 (float64_is_infinity(v1) && (m2 & (1 << (5-neg)))) ||
653 (float64_is_any_nan(v1) && (m2 & (1 << (3-neg)))) ||
654 (float64_is_signaling_nan(v1) && (m2 & (1 << (1-neg))))) {
655 cc = 1;
656 } else if (m2 & (1 << (9-neg))) {
657 /* assume normalized number */
658 cc = 1;
660 /* FIXME: denormalized? */
661 return cc;
664 /* test data class 128-bit */
665 uint32_t HELPER(tcxb)(uint64_t ah, uint64_t al, uint64_t m2)
667 float128 v1 = make_float128(ah, al);
668 int neg = float128_is_neg(v1);
669 uint32_t cc = 0;
671 if ((float128_is_zero(v1) && (m2 & (1 << (11-neg)))) ||
672 (float128_is_infinity(v1) && (m2 & (1 << (5-neg)))) ||
673 (float128_is_any_nan(v1) && (m2 & (1 << (3-neg)))) ||
674 (float128_is_signaling_nan(v1) && (m2 & (1 << (1-neg))))) {
675 cc = 1;
676 } else if (m2 & (1 << (9-neg))) {
677 /* assume normalized number */
678 cc = 1;
680 /* FIXME: denormalized? */
681 return cc;
684 /* square root 32-bit */
685 uint64_t HELPER(sqeb)(CPUS390XState *env, uint64_t f2)
687 float32 ret = float32_sqrt(f2, &env->fpu_status);
688 handle_exceptions(env, GETPC());
689 return ret;
692 /* square root 64-bit */
693 uint64_t HELPER(sqdb)(CPUS390XState *env, uint64_t f2)
695 float64 ret = float64_sqrt(f2, &env->fpu_status);
696 handle_exceptions(env, GETPC());
697 return ret;
700 /* square root 128-bit */
701 uint64_t HELPER(sqxb)(CPUS390XState *env, uint64_t ah, uint64_t al)
703 float128 ret = float128_sqrt(make_float128(ah, al), &env->fpu_status);
704 handle_exceptions(env, GETPC());
705 return RET128(ret);
708 static const int fpc_to_rnd[4] = {
709 float_round_nearest_even,
710 float_round_to_zero,
711 float_round_up,
712 float_round_down
715 /* set fpc */
716 void HELPER(sfpc)(CPUS390XState *env, uint64_t fpc)
718 /* Install everything in the main FPC. */
719 env->fpc = fpc;
721 /* Install the rounding mode in the shadow fpu_status. */
722 set_float_rounding_mode(fpc_to_rnd[fpc & 3], &env->fpu_status);
725 /* set fpc and signal */
726 void HELPER(sfas)(CPUS390XState *env, uint64_t val)
728 uint32_t signalling = env->fpc;
729 uint32_t source = val;
730 uint32_t s390_exc;
732 /* The contents of the source operand are placed in the FPC register;
733 then the flags in the FPC register are set to the logical OR of the
734 signalling flags and the source flags. */
735 env->fpc = source | (signalling & 0x00ff0000);
736 set_float_rounding_mode(fpc_to_rnd[source & 3], &env->fpu_status);
738 /* If any signalling flag is 1 and the corresponding source mask
739 is also 1, a simulated-iee-exception trap occurs. */
740 s390_exc = (signalling >> 16) & (source >> 24);
741 if (s390_exc) {
742 ieee_exception(env, s390_exc | 3, GETPC());