| 1 | /* |
| 2 | * S/390 FPU helper routines |
| 3 | * |
| 4 | * Copyright (c) 2009 Ulrich Hecht |
| 5 | * Copyright (c) 2009 Alexander Graf |
| 6 | * |
| 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 2.1 of the License, or (at your option) any later version. |
| 11 | * |
| 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. |
| 16 | * |
| 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/>. |
| 19 | */ |
| 20 | |
| 21 | #include "qemu/osdep.h" |
| 22 | #include "cpu.h" |
| 23 | #include "s390x-internal.h" |
| 24 | #include "tcg_s390x.h" |
| 25 | #include "exec/helper-proto.h" |
| 26 | #include "fpu/softfloat.h" |
| 27 | #include "fpu/softfloat-parts.h" |
| 28 | |
| 29 | /* #define DEBUG_HELPER */ |
| 30 | #ifdef DEBUG_HELPER |
| 31 | #define HELPER_LOG(x...) qemu_log(x) |
| 32 | #else |
| 33 | #define HELPER_LOG(x...) |
| 34 | #endif |
| 35 | |
| 36 | static inline Int128 RET128(float128 f) |
| 37 | { |
| 38 | return int128_make128(f.low, f.high); |
| 39 | } |
| 40 | |
| 41 | static inline float128 ARG128(Int128 i) |
| 42 | { |
| 43 | return make_float128(int128_gethi(i), int128_getlo(i)); |
| 44 | } |
| 45 | |
| 46 | uint8_t s390_softfloat_exc_to_ieee(unsigned int exc) |
| 47 | { |
| 48 | uint8_t s390_exc = 0; |
| 49 | |
| 50 | s390_exc |= (exc & float_flag_invalid) ? S390_IEEE_MASK_INVALID : 0; |
| 51 | s390_exc |= (exc & float_flag_divbyzero) ? S390_IEEE_MASK_DIVBYZERO : 0; |
| 52 | s390_exc |= (exc & float_flag_overflow) ? S390_IEEE_MASK_OVERFLOW : 0; |
| 53 | s390_exc |= (exc & float_flag_underflow) ? S390_IEEE_MASK_UNDERFLOW : 0; |
| 54 | s390_exc |= (exc & (float_flag_inexact | float_flag_invalid_cvti)) ? |
| 55 | S390_IEEE_MASK_INEXACT : 0; |
| 56 | |
| 57 | return s390_exc; |
| 58 | } |
| 59 | |
| 60 | static int s390_get_bfp_rounding_mode(CPUS390XState *env, int m3) |
| 61 | { |
| 62 | switch (m3) { |
| 63 | case 0: |
| 64 | /* current mode */ |
| 65 | return get_float_rounding_mode(&env->fpu_status); |
| 66 | case 1: |
| 67 | /* round to nearest with ties away from 0 */ |
| 68 | return float_round_ties_away; |
| 69 | case 3: |
| 70 | /* round to prepare for shorter precision */ |
| 71 | return float_round_to_odd; |
| 72 | case 4: |
| 73 | /* round to nearest with ties to even */ |
| 74 | return float_round_nearest_even; |
| 75 | case 5: |
| 76 | /* round to zero */ |
| 77 | return float_round_to_zero; |
| 78 | case 6: |
| 79 | /* round to +inf */ |
| 80 | return float_round_up; |
| 81 | case 7: |
| 82 | /* round to -inf */ |
| 83 | return float_round_down; |
| 84 | default: |
| 85 | g_assert_not_reached(); |
| 86 | } |
| 87 | } |
| 88 | |
| 89 | /* Should be called after any operation that may raise IEEE exceptions. */ |
| 90 | static void handle_exceptions(CPUS390XState *env, bool XxC, uintptr_t retaddr) |
| 91 | { |
| 92 | unsigned s390_exc, qemu_exc; |
| 93 | |
| 94 | /* Get the exceptions raised by the current operation. Reset the |
| 95 | fpu_status contents so that the next operation has a clean slate. */ |
| 96 | qemu_exc = env->fpu_status.float_exception_flags; |
| 97 | if (qemu_exc == 0) { |
| 98 | return; |
| 99 | } |
| 100 | env->fpu_status.float_exception_flags = 0; |
| 101 | s390_exc = s390_softfloat_exc_to_ieee(qemu_exc); |
| 102 | |
| 103 | /* |
| 104 | * IEEE-Underflow exception recognition exists if a tininess condition |
| 105 | * (underflow) exists and |
| 106 | * - The mask bit in the FPC is zero and the result is inexact |
| 107 | * - The mask bit in the FPC is one |
| 108 | * So tininess conditions that are not inexact don't trigger any |
| 109 | * underflow action in case the mask bit is not one. |
| 110 | */ |
| 111 | if (!(s390_exc & S390_IEEE_MASK_INEXACT) && |
| 112 | !((env->fpc >> 24) & S390_IEEE_MASK_UNDERFLOW)) { |
| 113 | s390_exc &= ~S390_IEEE_MASK_UNDERFLOW; |
| 114 | } |
| 115 | |
| 116 | /* |
| 117 | * FIXME: |
| 118 | * 1. Right now, all inexact conditions are indicated as |
| 119 | * "truncated" (0) and never as "incremented" (1) in the DXC. |
| 120 | * 2. Only traps due to invalid/divbyzero are suppressing. Other traps |
| 121 | * are completing, meaning the target register has to be written! |
| 122 | * This, however will mean that we have to write the register before |
| 123 | * triggering the trap - impossible right now. |
| 124 | */ |
| 125 | |
| 126 | /* |
| 127 | * invalid/divbyzero cannot coexist with other conditions. |
| 128 | * overflow/underflow however can coexist with inexact, we have to |
| 129 | * handle it separately. |
| 130 | */ |
| 131 | if (s390_exc & ~S390_IEEE_MASK_INEXACT) { |
| 132 | if (s390_exc & ~S390_IEEE_MASK_INEXACT & env->fpc >> 24) { |
| 133 | /* trap condition - inexact reported along */ |
| 134 | tcg_s390_data_exception(env, s390_exc, retaddr); |
| 135 | } |
| 136 | /* nontrap condition - inexact handled differently */ |
| 137 | env->fpc |= (s390_exc & ~S390_IEEE_MASK_INEXACT) << 16; |
| 138 | } |
| 139 | |
| 140 | /* inexact handling */ |
| 141 | if (s390_exc & S390_IEEE_MASK_INEXACT && !XxC) { |
| 142 | /* trap condition - overflow/underflow _not_ reported along */ |
| 143 | if (s390_exc & S390_IEEE_MASK_INEXACT & env->fpc >> 24) { |
| 144 | tcg_s390_data_exception(env, s390_exc & S390_IEEE_MASK_INEXACT, |
| 145 | retaddr); |
| 146 | } |
| 147 | /* nontrap condition */ |
| 148 | env->fpc |= (s390_exc & S390_IEEE_MASK_INEXACT) << 16; |
| 149 | } |
| 150 | } |
| 151 | |
| 152 | int float_comp_to_cc(CPUS390XState *env, FloatRelation float_compare) |
| 153 | { |
| 154 | switch (float_compare) { |
| 155 | case float_relation_equal: |
| 156 | return 0; |
| 157 | case float_relation_less: |
| 158 | return 1; |
| 159 | case float_relation_greater: |
| 160 | return 2; |
| 161 | case float_relation_unordered: |
| 162 | return 3; |
| 163 | default: |
| 164 | cpu_abort(env_cpu(env), "unknown return value for float compare\n"); |
| 165 | } |
| 166 | } |
| 167 | |
| 168 | /* condition codes for unary FP ops */ |
| 169 | uint32_t set_cc_nz_f32(float32 v) |
| 170 | { |
| 171 | if (float32_is_any_nan(v)) { |
| 172 | return 3; |
| 173 | } else if (float32_is_zero(v)) { |
| 174 | return 0; |
| 175 | } else if (float32_is_neg(v)) { |
| 176 | return 1; |
| 177 | } else { |
| 178 | return 2; |
| 179 | } |
| 180 | } |
| 181 | |
| 182 | uint32_t set_cc_nz_f64(float64 v) |
| 183 | { |
| 184 | if (float64_is_any_nan(v)) { |
| 185 | return 3; |
| 186 | } else if (float64_is_zero(v)) { |
| 187 | return 0; |
| 188 | } else if (float64_is_neg(v)) { |
| 189 | return 1; |
| 190 | } else { |
| 191 | return 2; |
| 192 | } |
| 193 | } |
| 194 | |
| 195 | uint32_t set_cc_nz_f128(float128 v) |
| 196 | { |
| 197 | if (float128_is_any_nan(v)) { |
| 198 | return 3; |
| 199 | } else if (float128_is_zero(v)) { |
| 200 | return 0; |
| 201 | } else if (float128_is_neg(v)) { |
| 202 | return 1; |
| 203 | } else { |
| 204 | return 2; |
| 205 | } |
| 206 | } |
| 207 | |
| 208 | /* condition codes for FP to integer conversion ops */ |
| 209 | static uint32_t set_cc_conv_f32(float32 v, float_status *stat) |
| 210 | { |
| 211 | if (stat->float_exception_flags & float_flag_invalid) { |
| 212 | return 3; |
| 213 | } else { |
| 214 | return set_cc_nz_f32(v); |
| 215 | } |
| 216 | } |
| 217 | |
| 218 | static uint32_t set_cc_conv_f64(float64 v, float_status *stat) |
| 219 | { |
| 220 | if (stat->float_exception_flags & float_flag_invalid) { |
| 221 | return 3; |
| 222 | } else { |
| 223 | return set_cc_nz_f64(v); |
| 224 | } |
| 225 | } |
| 226 | |
| 227 | static uint32_t set_cc_conv_f128(float128 v, float_status *stat) |
| 228 | { |
| 229 | if (stat->float_exception_flags & float_flag_invalid) { |
| 230 | return 3; |
| 231 | } else { |
| 232 | return set_cc_nz_f128(v); |
| 233 | } |
| 234 | } |
| 235 | |
| 236 | static inline uint8_t round_from_m34(uint32_t m34) |
| 237 | { |
| 238 | return extract32(m34, 0, 4); |
| 239 | } |
| 240 | |
| 241 | static inline bool xxc_from_m34(uint32_t m34) |
| 242 | { |
| 243 | /* XxC is bit 1 of m4 */ |
| 244 | return extract32(m34, 4 + 3 - 1, 1); |
| 245 | } |
| 246 | |
| 247 | /* 32-bit FP addition */ |
| 248 | uint64_t HELPER(aeb)(CPUS390XState *env, uint64_t f1, uint64_t f2) |
| 249 | { |
| 250 | float32 ret = float32_add(f1, f2, &env->fpu_status); |
| 251 | handle_exceptions(env, false, GETPC()); |
| 252 | return ret; |
| 253 | } |
| 254 | |
| 255 | /* 64-bit FP addition */ |
| 256 | uint64_t HELPER(adb)(CPUS390XState *env, uint64_t f1, uint64_t f2) |
| 257 | { |
| 258 | float64 ret = float64_add(f1, f2, &env->fpu_status); |
| 259 | handle_exceptions(env, false, GETPC()); |
| 260 | return ret; |
| 261 | } |
| 262 | |
| 263 | /* 128-bit FP addition */ |
| 264 | Int128 HELPER(axb)(CPUS390XState *env, Int128 a, Int128 b) |
| 265 | { |
| 266 | float128 ret = float128_add(ARG128(a), ARG128(b), &env->fpu_status); |
| 267 | handle_exceptions(env, false, GETPC()); |
| 268 | return RET128(ret); |
| 269 | } |
| 270 | |
| 271 | /* 32-bit FP subtraction */ |
| 272 | uint64_t HELPER(seb)(CPUS390XState *env, uint64_t f1, uint64_t f2) |
| 273 | { |
| 274 | float32 ret = float32_sub(f1, f2, &env->fpu_status); |
| 275 | handle_exceptions(env, false, GETPC()); |
| 276 | return ret; |
| 277 | } |
| 278 | |
| 279 | /* 64-bit FP subtraction */ |
| 280 | uint64_t HELPER(sdb)(CPUS390XState *env, uint64_t f1, uint64_t f2) |
| 281 | { |
| 282 | float64 ret = float64_sub(f1, f2, &env->fpu_status); |
| 283 | handle_exceptions(env, false, GETPC()); |
| 284 | return ret; |
| 285 | } |
| 286 | |
| 287 | /* 128-bit FP subtraction */ |
| 288 | Int128 HELPER(sxb)(CPUS390XState *env, Int128 a, Int128 b) |
| 289 | { |
| 290 | float128 ret = float128_sub(ARG128(a), ARG128(b), &env->fpu_status); |
| 291 | handle_exceptions(env, false, GETPC()); |
| 292 | return RET128(ret); |
| 293 | } |
| 294 | |
| 295 | /* 32-bit FP division */ |
| 296 | uint64_t HELPER(deb)(CPUS390XState *env, uint64_t f1, uint64_t f2) |
| 297 | { |
| 298 | float32 ret = float32_div(f1, f2, &env->fpu_status); |
| 299 | handle_exceptions(env, false, GETPC()); |
| 300 | return ret; |
| 301 | } |
| 302 | |
| 303 | /* 64-bit FP division */ |
| 304 | uint64_t HELPER(ddb)(CPUS390XState *env, uint64_t f1, uint64_t f2) |
| 305 | { |
| 306 | float64 ret = float64_div(f1, f2, &env->fpu_status); |
| 307 | handle_exceptions(env, false, GETPC()); |
| 308 | return ret; |
| 309 | } |
| 310 | |
| 311 | /* 128-bit FP division */ |
| 312 | Int128 HELPER(dxb)(CPUS390XState *env, Int128 a, Int128 b) |
| 313 | { |
| 314 | float128 ret = float128_div(ARG128(a), ARG128(b), &env->fpu_status); |
| 315 | handle_exceptions(env, false, GETPC()); |
| 316 | return RET128(ret); |
| 317 | } |
| 318 | |
| 319 | static void parts_s390_divide_to_integer(FloatParts64 *a, FloatParts64 *b, |
| 320 | int final_quotient_rounding_mode, |
| 321 | bool mask_underflow, bool mask_inexact, |
| 322 | const FloatFmt *fmt, |
| 323 | FloatParts64 *r, FloatParts64 *n, |
| 324 | uint32_t *cc, int *dxc, |
| 325 | float_status *status) |
| 326 | { |
| 327 | /* POp table "Results: DIVIDE TO INTEGER (Part 1 of 2)" */ |
| 328 | if ((float_cmask(a->cls) | float_cmask(b->cls)) & float_cmask_anynan) { |
| 329 | *r = parts64_pick_nan(a, b, status); |
| 330 | *n = *r; |
| 331 | *cc = 1; |
| 332 | } else if (a->cls == float_class_inf || b->cls == float_class_zero) { |
| 333 | *r = parts64_default_nan(status); |
| 334 | *n = *r; |
| 335 | *cc = 1; |
| 336 | status->float_exception_flags |= float_flag_invalid; |
| 337 | } else if (b->cls == float_class_inf) { |
| 338 | *r = *a; |
| 339 | n->cls = float_class_zero; |
| 340 | n->sign = a->sign ^ b->sign; |
| 341 | *cc = 0; |
| 342 | } else { |
| 343 | FloatParts64 *q, q_buf, r_precise; |
| 344 | int float_exception_flags = 0; |
| 345 | bool is_q_smallish; |
| 346 | uint32_t r_flags; |
| 347 | |
| 348 | /* Compute precise quotient */ |
| 349 | q_buf = parts64_div(a, b, status); |
| 350 | q = &q_buf; |
| 351 | |
| 352 | /* |
| 353 | * Check whether two closest integers can be precisely represented, |
| 354 | * i.e., all their bits fit into the fractional part. |
| 355 | */ |
| 356 | is_q_smallish = q->exp < (fmt->frac_size + 1); |
| 357 | |
| 358 | /* |
| 359 | * Final quotient is rounded using final-quotient-rounding method, and |
| 360 | * partial quotient is rounded toward zero. |
| 361 | * |
| 362 | * Rounding of partial quotient may be inexact. This is the whole point |
| 363 | * of distinguishing partial quotients, so ignore the exception. |
| 364 | */ |
| 365 | *n = parts64_round_to_int(q, |
| 366 | is_q_smallish |
| 367 | ? final_quotient_rounding_mode |
| 368 | : float_round_to_zero, |
| 369 | 0, status, fmt); |
| 370 | |
| 371 | /* Compute precise remainder */ |
| 372 | r_precise = parts64_muladd(b, n, a, |
| 373 | float_muladd_negate_product, status); |
| 374 | |
| 375 | /* Round remainder to the target format */ |
| 376 | *r = r_precise; |
| 377 | status->float_exception_flags = 0; |
| 378 | *r = parts64_round_to_fmt(r, status, fmt); |
| 379 | r_flags = status->float_exception_flags; |
| 380 | |
| 381 | /* POp table "Results: DIVIDE TO INTEGER (Part 2 of 2)" */ |
| 382 | if (is_q_smallish) { |
| 383 | if (r->cls != float_class_zero) { |
| 384 | if (r->exp < 2 - (1 << (fmt->exp_size - 1))) { |
| 385 | if (mask_underflow) { |
| 386 | float_exception_flags |= float_flag_underflow; |
| 387 | *dxc = 0x10; |
| 388 | r->exp += fmt->exp_re_bias; |
| 389 | } |
| 390 | } else if (r_flags & float_flag_inexact) { |
| 391 | float_exception_flags |= float_flag_inexact; |
| 392 | if (mask_inexact) { |
| 393 | bool saved_r_sign, saved_r_precise_sign; |
| 394 | |
| 395 | /* |
| 396 | * Check whether remainder was truncated (rounded |
| 397 | * toward zero) or incremented. |
| 398 | */ |
| 399 | saved_r_sign = r->sign; |
| 400 | saved_r_precise_sign = r_precise.sign; |
| 401 | r->sign = false; |
| 402 | r_precise.sign = false; |
| 403 | if (parts64_compare(r, &r_precise, status, true) < |
| 404 | float_relation_equal) { |
| 405 | *dxc = 0x8; |
| 406 | } else { |
| 407 | *dxc = 0xc; |
| 408 | } |
| 409 | r->sign = saved_r_sign; |
| 410 | r_precise.sign = saved_r_precise_sign; |
| 411 | } |
| 412 | } |
| 413 | } |
| 414 | *cc = 0; |
| 415 | } else if (n->exp > (1 << (fmt->exp_size - 1)) - 1) { |
| 416 | n->exp -= fmt->exp_re_bias; |
| 417 | *cc = r->cls == float_class_zero ? 1 : 3; |
| 418 | } else { |
| 419 | *cc = r->cls == float_class_zero ? 0 : 2; |
| 420 | } |
| 421 | |
| 422 | /* Adjust signs of zero results */ |
| 423 | if (r->cls == float_class_zero) { |
| 424 | r->sign = a->sign; |
| 425 | } |
| 426 | if (n->cls == float_class_zero) { |
| 427 | n->sign = a->sign ^ b->sign; |
| 428 | } |
| 429 | |
| 430 | status->float_exception_flags = float_exception_flags; |
| 431 | } |
| 432 | } |
| 433 | |
| 434 | #define DEFINE_S390_DIVIDE_TO_INTEGER(floatN) \ |
| 435 | static void floatN ## _s390_divide_to_integer(floatN a, floatN b, \ |
| 436 | int final_quotient_rounding_mode, bool mask_underflow, bool mask_inexact, \ |
| 437 | floatN *r, floatN *n, uint32_t *cc, int *dxc, float_status *status) \ |
| 438 | { \ |
| 439 | FloatParts64 pa = floatN ## _unpack_canonical(a, status); \ |
| 440 | FloatParts64 pb = floatN ## _unpack_canonical(b, status); \ |
| 441 | FloatParts64 pr, pn; \ |
| 442 | parts_s390_divide_to_integer(&pa, &pb, final_quotient_rounding_mode, \ |
| 443 | mask_underflow, mask_inexact, \ |
| 444 | &floatN ## _params, \ |
| 445 | &pr, &pn, cc, dxc, status); \ |
| 446 | *r = floatN ## _round_pack_canonical(&pr, status); \ |
| 447 | *n = floatN ## _round_pack_canonical(&pn, status); \ |
| 448 | } |
| 449 | |
| 450 | DEFINE_S390_DIVIDE_TO_INTEGER(float32) |
| 451 | DEFINE_S390_DIVIDE_TO_INTEGER(float64) |
| 452 | |
| 453 | void HELPER(dib)(CPUS390XState *env, uint32_t r1, uint32_t r2, uint32_t r3, |
| 454 | uint32_t m4, uint32_t bits) |
| 455 | { |
| 456 | int final_quotient_rounding_mode = s390_get_bfp_rounding_mode(env, m4); |
| 457 | bool mask_underflow = (env->fpc >> 24) & S390_IEEE_MASK_UNDERFLOW; |
| 458 | bool mask_inexact = (env->fpc >> 24) & S390_IEEE_MASK_INEXACT; |
| 459 | float32 a32, b32, n32, r32; |
| 460 | float64 a64, b64, n64, r64; |
| 461 | int dxc = -1; |
| 462 | uint32_t cc; |
| 463 | |
| 464 | if (bits == 32) { |
| 465 | a32 = env->vregs[r1][0] >> 32; |
| 466 | b32 = env->vregs[r2][0] >> 32; |
| 467 | |
| 468 | float32_s390_divide_to_integer( |
| 469 | a32, b32, |
| 470 | final_quotient_rounding_mode, |
| 471 | mask_underflow, mask_inexact, |
| 472 | &r32, &n32, &cc, &dxc, &env->fpu_status); |
| 473 | } else { |
| 474 | a64 = env->vregs[r1][0]; |
| 475 | b64 = env->vregs[r2][0]; |
| 476 | |
| 477 | float64_s390_divide_to_integer( |
| 478 | a64, b64, |
| 479 | final_quotient_rounding_mode, |
| 480 | mask_underflow, mask_inexact, |
| 481 | &r64, &n64, &cc, &dxc, &env->fpu_status); |
| 482 | } |
| 483 | |
| 484 | /* Flush the results if needed */ |
| 485 | if ((env->fpu_status.float_exception_flags & float_flag_invalid) && |
| 486 | ((env->fpc >> 24) & S390_IEEE_MASK_INVALID)) { |
| 487 | /* The action for invalid operation is "Suppress" */ |
| 488 | } else { |
| 489 | /* The action for other exceptions is "Complete" */ |
| 490 | if (bits == 32) { |
| 491 | env->vregs[r1][0] = deposit64(env->vregs[r1][0], 32, 32, r32); |
| 492 | env->vregs[r3][0] = deposit64(env->vregs[r3][0], 32, 32, n32); |
| 493 | } else { |
| 494 | env->vregs[r1][0] = r64; |
| 495 | env->vregs[r3][0] = n64; |
| 496 | } |
| 497 | env->cc_op = cc; |
| 498 | } |
| 499 | |
| 500 | /* Raise an exception if needed */ |
| 501 | if (dxc == -1) { |
| 502 | handle_exceptions(env, false, GETPC()); |
| 503 | } else { |
| 504 | env->fpu_status.float_exception_flags = 0; |
| 505 | tcg_s390_data_exception(env, dxc, GETPC()); |
| 506 | } |
| 507 | } |
| 508 | |
| 509 | /* 32-bit FP multiplication */ |
| 510 | uint64_t HELPER(meeb)(CPUS390XState *env, uint64_t f1, uint64_t f2) |
| 511 | { |
| 512 | float32 ret = float32_mul(f1, f2, &env->fpu_status); |
| 513 | handle_exceptions(env, false, GETPC()); |
| 514 | return ret; |
| 515 | } |
| 516 | |
| 517 | /* 64-bit FP multiplication */ |
| 518 | uint64_t HELPER(mdb)(CPUS390XState *env, uint64_t f1, uint64_t f2) |
| 519 | { |
| 520 | float64 ret = float64_mul(f1, f2, &env->fpu_status); |
| 521 | handle_exceptions(env, false, GETPC()); |
| 522 | return ret; |
| 523 | } |
| 524 | |
| 525 | /* 64/32-bit FP multiplication */ |
| 526 | uint64_t HELPER(mdeb)(CPUS390XState *env, uint64_t f1, uint64_t f2) |
| 527 | { |
| 528 | float64 f1_64 = float32_to_float64(f1, &env->fpu_status); |
| 529 | float64 ret = float32_to_float64(f2, &env->fpu_status); |
| 530 | ret = float64_mul(f1_64, ret, &env->fpu_status); |
| 531 | handle_exceptions(env, false, GETPC()); |
| 532 | return ret; |
| 533 | } |
| 534 | |
| 535 | /* 128-bit FP multiplication */ |
| 536 | Int128 HELPER(mxb)(CPUS390XState *env, Int128 a, Int128 b) |
| 537 | { |
| 538 | float128 ret = float128_mul(ARG128(a), ARG128(b), &env->fpu_status); |
| 539 | handle_exceptions(env, false, GETPC()); |
| 540 | return RET128(ret); |
| 541 | } |
| 542 | |
| 543 | /* 128/64-bit FP multiplication */ |
| 544 | Int128 HELPER(mxdb)(CPUS390XState *env, uint64_t f1, uint64_t f2) |
| 545 | { |
| 546 | float128 f1_128 = float64_to_float128(f1, &env->fpu_status); |
| 547 | float128 ret = float64_to_float128(f2, &env->fpu_status); |
| 548 | ret = float128_mul(f1_128, ret, &env->fpu_status); |
| 549 | handle_exceptions(env, false, GETPC()); |
| 550 | return RET128(ret); |
| 551 | } |
| 552 | |
| 553 | /* convert 32-bit float to 64-bit float */ |
| 554 | uint64_t HELPER(ldeb)(CPUS390XState *env, uint64_t f2) |
| 555 | { |
| 556 | float64 ret = float32_to_float64(f2, &env->fpu_status); |
| 557 | handle_exceptions(env, false, GETPC()); |
| 558 | return ret; |
| 559 | } |
| 560 | |
| 561 | /* convert 128-bit float to 64-bit float */ |
| 562 | uint64_t HELPER(ldxb)(CPUS390XState *env, Int128 a, uint32_t m34) |
| 563 | { |
| 564 | int old_mode = s390_swap_bfp_rounding_mode(env, round_from_m34(m34)); |
| 565 | float64 ret = float128_to_float64(ARG128(a), &env->fpu_status); |
| 566 | |
| 567 | s390_restore_bfp_rounding_mode(env, old_mode); |
| 568 | handle_exceptions(env, xxc_from_m34(m34), GETPC()); |
| 569 | return ret; |
| 570 | } |
| 571 | |
| 572 | /* convert 64-bit float to 128-bit float */ |
| 573 | Int128 HELPER(lxdb)(CPUS390XState *env, uint64_t f2) |
| 574 | { |
| 575 | float128 ret = float64_to_float128(f2, &env->fpu_status); |
| 576 | handle_exceptions(env, false, GETPC()); |
| 577 | return RET128(ret); |
| 578 | } |
| 579 | |
| 580 | /* convert 32-bit float to 128-bit float */ |
| 581 | Int128 HELPER(lxeb)(CPUS390XState *env, uint64_t f2) |
| 582 | { |
| 583 | float128 ret = float32_to_float128(f2, &env->fpu_status); |
| 584 | handle_exceptions(env, false, GETPC()); |
| 585 | return RET128(ret); |
| 586 | } |
| 587 | |
| 588 | /* convert 64-bit float to 32-bit float */ |
| 589 | uint64_t HELPER(ledb)(CPUS390XState *env, uint64_t f2, uint32_t m34) |
| 590 | { |
| 591 | int old_mode = s390_swap_bfp_rounding_mode(env, round_from_m34(m34)); |
| 592 | float32 ret = float64_to_float32(f2, &env->fpu_status); |
| 593 | |
| 594 | s390_restore_bfp_rounding_mode(env, old_mode); |
| 595 | handle_exceptions(env, xxc_from_m34(m34), GETPC()); |
| 596 | return ret; |
| 597 | } |
| 598 | |
| 599 | /* convert 128-bit float to 32-bit float */ |
| 600 | uint64_t HELPER(lexb)(CPUS390XState *env, Int128 a, uint32_t m34) |
| 601 | { |
| 602 | int old_mode = s390_swap_bfp_rounding_mode(env, round_from_m34(m34)); |
| 603 | float32 ret = float128_to_float32(ARG128(a), &env->fpu_status); |
| 604 | |
| 605 | s390_restore_bfp_rounding_mode(env, old_mode); |
| 606 | handle_exceptions(env, xxc_from_m34(m34), GETPC()); |
| 607 | return ret; |
| 608 | } |
| 609 | |
| 610 | /* 32-bit FP compare */ |
| 611 | uint32_t HELPER(ceb)(CPUS390XState *env, uint64_t f1, uint64_t f2) |
| 612 | { |
| 613 | FloatRelation cmp = float32_compare_quiet(f1, f2, &env->fpu_status); |
| 614 | handle_exceptions(env, false, GETPC()); |
| 615 | return float_comp_to_cc(env, cmp); |
| 616 | } |
| 617 | |
| 618 | /* 64-bit FP compare */ |
| 619 | uint32_t HELPER(cdb)(CPUS390XState *env, uint64_t f1, uint64_t f2) |
| 620 | { |
| 621 | FloatRelation cmp = float64_compare_quiet(f1, f2, &env->fpu_status); |
| 622 | handle_exceptions(env, false, GETPC()); |
| 623 | return float_comp_to_cc(env, cmp); |
| 624 | } |
| 625 | |
| 626 | /* 128-bit FP compare */ |
| 627 | uint32_t HELPER(cxb)(CPUS390XState *env, Int128 a, Int128 b) |
| 628 | { |
| 629 | FloatRelation cmp = float128_compare_quiet(ARG128(a), ARG128(b), |
| 630 | &env->fpu_status); |
| 631 | handle_exceptions(env, false, GETPC()); |
| 632 | return float_comp_to_cc(env, cmp); |
| 633 | } |
| 634 | |
| 635 | int s390_swap_bfp_rounding_mode(CPUS390XState *env, int m3) |
| 636 | { |
| 637 | int ret = get_float_rounding_mode(&env->fpu_status); |
| 638 | |
| 639 | set_float_rounding_mode(s390_get_bfp_rounding_mode(env, m3), |
| 640 | &env->fpu_status); |
| 641 | return ret; |
| 642 | } |
| 643 | |
| 644 | void s390_restore_bfp_rounding_mode(CPUS390XState *env, int old_mode) |
| 645 | { |
| 646 | set_float_rounding_mode(old_mode, &env->fpu_status); |
| 647 | } |
| 648 | |
| 649 | /* convert 64-bit int to 32-bit float */ |
| 650 | uint64_t HELPER(cegb)(CPUS390XState *env, int64_t v2, uint32_t m34) |
| 651 | { |
| 652 | int old_mode = s390_swap_bfp_rounding_mode(env, round_from_m34(m34)); |
| 653 | float32 ret = int64_to_float32(v2, &env->fpu_status); |
| 654 | |
| 655 | s390_restore_bfp_rounding_mode(env, old_mode); |
| 656 | handle_exceptions(env, xxc_from_m34(m34), GETPC()); |
| 657 | return ret; |
| 658 | } |
| 659 | |
| 660 | /* convert 64-bit int to 64-bit float */ |
| 661 | uint64_t HELPER(cdgb)(CPUS390XState *env, int64_t v2, uint32_t m34) |
| 662 | { |
| 663 | int old_mode = s390_swap_bfp_rounding_mode(env, round_from_m34(m34)); |
| 664 | float64 ret = int64_to_float64(v2, &env->fpu_status); |
| 665 | |
| 666 | s390_restore_bfp_rounding_mode(env, old_mode); |
| 667 | handle_exceptions(env, xxc_from_m34(m34), GETPC()); |
| 668 | return ret; |
| 669 | } |
| 670 | |
| 671 | /* convert 64-bit int to 128-bit float */ |
| 672 | Int128 HELPER(cxgb)(CPUS390XState *env, int64_t v2, uint32_t m34) |
| 673 | { |
| 674 | int old_mode = s390_swap_bfp_rounding_mode(env, round_from_m34(m34)); |
| 675 | float128 ret = int64_to_float128(v2, &env->fpu_status); |
| 676 | |
| 677 | s390_restore_bfp_rounding_mode(env, old_mode); |
| 678 | handle_exceptions(env, xxc_from_m34(m34), GETPC()); |
| 679 | return RET128(ret); |
| 680 | } |
| 681 | |
| 682 | /* convert 64-bit uint to 32-bit float */ |
| 683 | uint64_t HELPER(celgb)(CPUS390XState *env, uint64_t v2, uint32_t m34) |
| 684 | { |
| 685 | int old_mode = s390_swap_bfp_rounding_mode(env, round_from_m34(m34)); |
| 686 | float32 ret = uint64_to_float32(v2, &env->fpu_status); |
| 687 | |
| 688 | s390_restore_bfp_rounding_mode(env, old_mode); |
| 689 | handle_exceptions(env, xxc_from_m34(m34), GETPC()); |
| 690 | return ret; |
| 691 | } |
| 692 | |
| 693 | /* convert 64-bit uint to 64-bit float */ |
| 694 | uint64_t HELPER(cdlgb)(CPUS390XState *env, uint64_t v2, uint32_t m34) |
| 695 | { |
| 696 | int old_mode = s390_swap_bfp_rounding_mode(env, round_from_m34(m34)); |
| 697 | float64 ret = uint64_to_float64(v2, &env->fpu_status); |
| 698 | |
| 699 | s390_restore_bfp_rounding_mode(env, old_mode); |
| 700 | handle_exceptions(env, xxc_from_m34(m34), GETPC()); |
| 701 | return ret; |
| 702 | } |
| 703 | |
| 704 | /* convert 64-bit uint to 128-bit float */ |
| 705 | Int128 HELPER(cxlgb)(CPUS390XState *env, uint64_t v2, uint32_t m34) |
| 706 | { |
| 707 | int old_mode = s390_swap_bfp_rounding_mode(env, round_from_m34(m34)); |
| 708 | float128 ret = uint64_to_float128(v2, &env->fpu_status); |
| 709 | |
| 710 | s390_restore_bfp_rounding_mode(env, old_mode); |
| 711 | handle_exceptions(env, xxc_from_m34(m34), GETPC()); |
| 712 | return RET128(ret); |
| 713 | } |
| 714 | |
| 715 | /* convert 32-bit float to 64-bit int */ |
| 716 | uint64_t HELPER(cgeb)(CPUS390XState *env, uint64_t v2, uint32_t m34) |
| 717 | { |
| 718 | int old_mode = s390_swap_bfp_rounding_mode(env, round_from_m34(m34)); |
| 719 | int64_t ret = float32_to_int64(v2, &env->fpu_status); |
| 720 | uint32_t cc = set_cc_conv_f32(v2, &env->fpu_status); |
| 721 | |
| 722 | s390_restore_bfp_rounding_mode(env, old_mode); |
| 723 | handle_exceptions(env, xxc_from_m34(m34), GETPC()); |
| 724 | env->cc_op = cc; |
| 725 | if (float32_is_any_nan(v2)) { |
| 726 | return INT64_MIN; |
| 727 | } |
| 728 | return ret; |
| 729 | } |
| 730 | |
| 731 | /* convert 64-bit float to 64-bit int */ |
| 732 | uint64_t HELPER(cgdb)(CPUS390XState *env, uint64_t v2, uint32_t m34) |
| 733 | { |
| 734 | int old_mode = s390_swap_bfp_rounding_mode(env, round_from_m34(m34)); |
| 735 | int64_t ret = float64_to_int64(v2, &env->fpu_status); |
| 736 | uint32_t cc = set_cc_conv_f64(v2, &env->fpu_status); |
| 737 | |
| 738 | s390_restore_bfp_rounding_mode(env, old_mode); |
| 739 | handle_exceptions(env, xxc_from_m34(m34), GETPC()); |
| 740 | env->cc_op = cc; |
| 741 | if (float64_is_any_nan(v2)) { |
| 742 | return INT64_MIN; |
| 743 | } |
| 744 | return ret; |
| 745 | } |
| 746 | |
| 747 | /* convert 128-bit float to 64-bit int */ |
| 748 | uint64_t HELPER(cgxb)(CPUS390XState *env, Int128 i2, uint32_t m34) |
| 749 | { |
| 750 | int old_mode = s390_swap_bfp_rounding_mode(env, round_from_m34(m34)); |
| 751 | float128 v2 = ARG128(i2); |
| 752 | int64_t ret = float128_to_int64(v2, &env->fpu_status); |
| 753 | uint32_t cc = set_cc_conv_f128(v2, &env->fpu_status); |
| 754 | |
| 755 | s390_restore_bfp_rounding_mode(env, old_mode); |
| 756 | handle_exceptions(env, xxc_from_m34(m34), GETPC()); |
| 757 | env->cc_op = cc; |
| 758 | if (float128_is_any_nan(v2)) { |
| 759 | return INT64_MIN; |
| 760 | } |
| 761 | return ret; |
| 762 | } |
| 763 | |
| 764 | /* convert 32-bit float to 32-bit int */ |
| 765 | uint64_t HELPER(cfeb)(CPUS390XState *env, uint64_t v2, uint32_t m34) |
| 766 | { |
| 767 | int old_mode = s390_swap_bfp_rounding_mode(env, round_from_m34(m34)); |
| 768 | int32_t ret = float32_to_int32(v2, &env->fpu_status); |
| 769 | uint32_t cc = set_cc_conv_f32(v2, &env->fpu_status); |
| 770 | |
| 771 | s390_restore_bfp_rounding_mode(env, old_mode); |
| 772 | handle_exceptions(env, xxc_from_m34(m34), GETPC()); |
| 773 | env->cc_op = cc; |
| 774 | if (float32_is_any_nan(v2)) { |
| 775 | return INT32_MIN; |
| 776 | } |
| 777 | return ret; |
| 778 | } |
| 779 | |
| 780 | /* convert 64-bit float to 32-bit int */ |
| 781 | uint64_t HELPER(cfdb)(CPUS390XState *env, uint64_t v2, uint32_t m34) |
| 782 | { |
| 783 | int old_mode = s390_swap_bfp_rounding_mode(env, round_from_m34(m34)); |
| 784 | int32_t ret = float64_to_int32(v2, &env->fpu_status); |
| 785 | uint32_t cc = set_cc_conv_f64(v2, &env->fpu_status); |
| 786 | |
| 787 | s390_restore_bfp_rounding_mode(env, old_mode); |
| 788 | handle_exceptions(env, xxc_from_m34(m34), GETPC()); |
| 789 | env->cc_op = cc; |
| 790 | if (float64_is_any_nan(v2)) { |
| 791 | return INT32_MIN; |
| 792 | } |
| 793 | return ret; |
| 794 | } |
| 795 | |
| 796 | /* convert 128-bit float to 32-bit int */ |
| 797 | uint64_t HELPER(cfxb)(CPUS390XState *env, Int128 i2, uint32_t m34) |
| 798 | { |
| 799 | int old_mode = s390_swap_bfp_rounding_mode(env, round_from_m34(m34)); |
| 800 | float128 v2 = ARG128(i2); |
| 801 | int32_t ret = float128_to_int32(v2, &env->fpu_status); |
| 802 | uint32_t cc = set_cc_conv_f128(v2, &env->fpu_status); |
| 803 | |
| 804 | s390_restore_bfp_rounding_mode(env, old_mode); |
| 805 | handle_exceptions(env, xxc_from_m34(m34), GETPC()); |
| 806 | env->cc_op = cc; |
| 807 | if (float128_is_any_nan(v2)) { |
| 808 | return INT32_MIN; |
| 809 | } |
| 810 | return ret; |
| 811 | } |
| 812 | |
| 813 | /* convert 32-bit float to 64-bit uint */ |
| 814 | uint64_t HELPER(clgeb)(CPUS390XState *env, uint64_t v2, uint32_t m34) |
| 815 | { |
| 816 | int old_mode = s390_swap_bfp_rounding_mode(env, round_from_m34(m34)); |
| 817 | uint64_t ret = float32_to_uint64(v2, &env->fpu_status); |
| 818 | uint32_t cc = set_cc_conv_f32(v2, &env->fpu_status); |
| 819 | |
| 820 | s390_restore_bfp_rounding_mode(env, old_mode); |
| 821 | handle_exceptions(env, xxc_from_m34(m34), GETPC()); |
| 822 | env->cc_op = cc; |
| 823 | if (float32_is_any_nan(v2)) { |
| 824 | return 0; |
| 825 | } |
| 826 | return ret; |
| 827 | } |
| 828 | |
| 829 | /* convert 64-bit float to 64-bit uint */ |
| 830 | uint64_t HELPER(clgdb)(CPUS390XState *env, uint64_t v2, uint32_t m34) |
| 831 | { |
| 832 | int old_mode = s390_swap_bfp_rounding_mode(env, round_from_m34(m34)); |
| 833 | uint64_t ret = float64_to_uint64(v2, &env->fpu_status); |
| 834 | uint32_t cc = set_cc_conv_f64(v2, &env->fpu_status); |
| 835 | |
| 836 | s390_restore_bfp_rounding_mode(env, old_mode); |
| 837 | handle_exceptions(env, xxc_from_m34(m34), GETPC()); |
| 838 | env->cc_op = cc; |
| 839 | if (float64_is_any_nan(v2)) { |
| 840 | return 0; |
| 841 | } |
| 842 | return ret; |
| 843 | } |
| 844 | |
| 845 | /* convert 128-bit float to 64-bit uint */ |
| 846 | uint64_t HELPER(clgxb)(CPUS390XState *env, Int128 i2, uint32_t m34) |
| 847 | { |
| 848 | int old_mode = s390_swap_bfp_rounding_mode(env, round_from_m34(m34)); |
| 849 | float128 v2 = ARG128(i2); |
| 850 | uint64_t ret = float128_to_uint64(v2, &env->fpu_status); |
| 851 | uint32_t cc = set_cc_conv_f128(v2, &env->fpu_status); |
| 852 | |
| 853 | s390_restore_bfp_rounding_mode(env, old_mode); |
| 854 | handle_exceptions(env, xxc_from_m34(m34), GETPC()); |
| 855 | env->cc_op = cc; |
| 856 | if (float128_is_any_nan(v2)) { |
| 857 | return 0; |
| 858 | } |
| 859 | return ret; |
| 860 | } |
| 861 | |
| 862 | /* convert 32-bit float to 32-bit uint */ |
| 863 | uint64_t HELPER(clfeb)(CPUS390XState *env, uint64_t v2, uint32_t m34) |
| 864 | { |
| 865 | int old_mode = s390_swap_bfp_rounding_mode(env, round_from_m34(m34)); |
| 866 | uint32_t ret = float32_to_uint32(v2, &env->fpu_status); |
| 867 | uint32_t cc = set_cc_conv_f32(v2, &env->fpu_status); |
| 868 | |
| 869 | s390_restore_bfp_rounding_mode(env, old_mode); |
| 870 | handle_exceptions(env, xxc_from_m34(m34), GETPC()); |
| 871 | env->cc_op = cc; |
| 872 | if (float32_is_any_nan(v2)) { |
| 873 | return 0; |
| 874 | } |
| 875 | return ret; |
| 876 | } |
| 877 | |
| 878 | /* convert 64-bit float to 32-bit uint */ |
| 879 | uint64_t HELPER(clfdb)(CPUS390XState *env, uint64_t v2, uint32_t m34) |
| 880 | { |
| 881 | int old_mode = s390_swap_bfp_rounding_mode(env, round_from_m34(m34)); |
| 882 | uint32_t ret = float64_to_uint32(v2, &env->fpu_status); |
| 883 | uint32_t cc = set_cc_conv_f64(v2, &env->fpu_status); |
| 884 | |
| 885 | s390_restore_bfp_rounding_mode(env, old_mode); |
| 886 | handle_exceptions(env, xxc_from_m34(m34), GETPC()); |
| 887 | env->cc_op = cc; |
| 888 | if (float64_is_any_nan(v2)) { |
| 889 | return 0; |
| 890 | } |
| 891 | return ret; |
| 892 | } |
| 893 | |
| 894 | /* convert 128-bit float to 32-bit uint */ |
| 895 | uint64_t HELPER(clfxb)(CPUS390XState *env, Int128 i2, uint32_t m34) |
| 896 | { |
| 897 | int old_mode = s390_swap_bfp_rounding_mode(env, round_from_m34(m34)); |
| 898 | float128 v2 = ARG128(i2); |
| 899 | uint32_t ret = float128_to_uint32(v2, &env->fpu_status); |
| 900 | uint32_t cc = set_cc_conv_f128(v2, &env->fpu_status); |
| 901 | |
| 902 | s390_restore_bfp_rounding_mode(env, old_mode); |
| 903 | handle_exceptions(env, xxc_from_m34(m34), GETPC()); |
| 904 | env->cc_op = cc; |
| 905 | if (float128_is_any_nan(v2)) { |
| 906 | return 0; |
| 907 | } |
| 908 | return ret; |
| 909 | } |
| 910 | |
| 911 | /* round to integer 32-bit */ |
| 912 | uint64_t HELPER(fieb)(CPUS390XState *env, uint64_t f2, uint32_t m34) |
| 913 | { |
| 914 | int old_mode = s390_swap_bfp_rounding_mode(env, round_from_m34(m34)); |
| 915 | float32 ret = float32_round_to_int(f2, &env->fpu_status); |
| 916 | |
| 917 | s390_restore_bfp_rounding_mode(env, old_mode); |
| 918 | handle_exceptions(env, xxc_from_m34(m34), GETPC()); |
| 919 | return ret; |
| 920 | } |
| 921 | |
| 922 | /* round to integer 64-bit */ |
| 923 | uint64_t HELPER(fidb)(CPUS390XState *env, uint64_t f2, uint32_t m34) |
| 924 | { |
| 925 | int old_mode = s390_swap_bfp_rounding_mode(env, round_from_m34(m34)); |
| 926 | float64 ret = float64_round_to_int(f2, &env->fpu_status); |
| 927 | |
| 928 | s390_restore_bfp_rounding_mode(env, old_mode); |
| 929 | handle_exceptions(env, xxc_from_m34(m34), GETPC()); |
| 930 | return ret; |
| 931 | } |
| 932 | |
| 933 | /* round to integer 128-bit */ |
| 934 | Int128 HELPER(fixb)(CPUS390XState *env, Int128 a, uint32_t m34) |
| 935 | { |
| 936 | int old_mode = s390_swap_bfp_rounding_mode(env, round_from_m34(m34)); |
| 937 | float128 ret = float128_round_to_int(ARG128(a), &env->fpu_status); |
| 938 | |
| 939 | s390_restore_bfp_rounding_mode(env, old_mode); |
| 940 | handle_exceptions(env, xxc_from_m34(m34), GETPC()); |
| 941 | return RET128(ret); |
| 942 | } |
| 943 | |
| 944 | /* 32-bit FP compare and signal */ |
| 945 | uint32_t HELPER(keb)(CPUS390XState *env, uint64_t f1, uint64_t f2) |
| 946 | { |
| 947 | FloatRelation cmp = float32_compare(f1, f2, &env->fpu_status); |
| 948 | handle_exceptions(env, false, GETPC()); |
| 949 | return float_comp_to_cc(env, cmp); |
| 950 | } |
| 951 | |
| 952 | /* 64-bit FP compare and signal */ |
| 953 | uint32_t HELPER(kdb)(CPUS390XState *env, uint64_t f1, uint64_t f2) |
| 954 | { |
| 955 | FloatRelation cmp = float64_compare(f1, f2, &env->fpu_status); |
| 956 | handle_exceptions(env, false, GETPC()); |
| 957 | return float_comp_to_cc(env, cmp); |
| 958 | } |
| 959 | |
| 960 | /* 128-bit FP compare and signal */ |
| 961 | uint32_t HELPER(kxb)(CPUS390XState *env, Int128 a, Int128 b) |
| 962 | { |
| 963 | FloatRelation cmp = float128_compare(ARG128(a), ARG128(b), |
| 964 | &env->fpu_status); |
| 965 | handle_exceptions(env, false, GETPC()); |
| 966 | return float_comp_to_cc(env, cmp); |
| 967 | } |
| 968 | |
| 969 | /* 32-bit FP multiply and add */ |
| 970 | uint64_t HELPER(maeb)(CPUS390XState *env, uint64_t f1, |
| 971 | uint64_t f2, uint64_t f3) |
| 972 | { |
| 973 | float32 ret = float32_muladd(f3, f2, f1, 0, &env->fpu_status); |
| 974 | handle_exceptions(env, false, GETPC()); |
| 975 | return ret; |
| 976 | } |
| 977 | |
| 978 | /* 64-bit FP multiply and add */ |
| 979 | uint64_t HELPER(madb)(CPUS390XState *env, uint64_t f1, |
| 980 | uint64_t f2, uint64_t f3) |
| 981 | { |
| 982 | float64 ret = float64_muladd(f3, f2, f1, 0, &env->fpu_status); |
| 983 | handle_exceptions(env, false, GETPC()); |
| 984 | return ret; |
| 985 | } |
| 986 | |
| 987 | /* 32-bit FP multiply and subtract */ |
| 988 | uint64_t HELPER(mseb)(CPUS390XState *env, uint64_t f1, |
| 989 | uint64_t f2, uint64_t f3) |
| 990 | { |
| 991 | float32 ret = float32_muladd(f3, f2, f1, float_muladd_negate_c, |
| 992 | &env->fpu_status); |
| 993 | handle_exceptions(env, false, GETPC()); |
| 994 | return ret; |
| 995 | } |
| 996 | |
| 997 | /* 64-bit FP multiply and subtract */ |
| 998 | uint64_t HELPER(msdb)(CPUS390XState *env, uint64_t f1, |
| 999 | uint64_t f2, uint64_t f3) |
| 1000 | { |
| 1001 | float64 ret = float64_muladd(f3, f2, f1, float_muladd_negate_c, |
| 1002 | &env->fpu_status); |
| 1003 | handle_exceptions(env, false, GETPC()); |
| 1004 | return ret; |
| 1005 | } |
| 1006 | |
| 1007 | /* The rightmost bit has the number 11. */ |
| 1008 | static inline uint16_t dcmask(int bit, bool neg) |
| 1009 | { |
| 1010 | return 1 << (11 - bit - neg); |
| 1011 | } |
| 1012 | |
| 1013 | #define DEF_FLOAT_DCMASK(_TYPE) \ |
| 1014 | uint16_t _TYPE##_dcmask(CPUS390XState *env, _TYPE f1) \ |
| 1015 | { \ |
| 1016 | const bool neg = _TYPE##_is_neg(f1); \ |
| 1017 | \ |
| 1018 | /* Sorted by most common cases - only one class is possible */ \ |
| 1019 | if (_TYPE##_is_normal(f1)) { \ |
| 1020 | return dcmask(2, neg); \ |
| 1021 | } else if (_TYPE##_is_zero(f1)) { \ |
| 1022 | return dcmask(0, neg); \ |
| 1023 | } else if (_TYPE##_is_denormal(f1)) { \ |
| 1024 | return dcmask(4, neg); \ |
| 1025 | } else if (_TYPE##_is_infinity(f1)) { \ |
| 1026 | return dcmask(6, neg); \ |
| 1027 | } else if (_TYPE##_is_quiet_nan(f1, &env->fpu_status)) { \ |
| 1028 | return dcmask(8, neg); \ |
| 1029 | } \ |
| 1030 | /* signaling nan, as last remaining case */ \ |
| 1031 | return dcmask(10, neg); \ |
| 1032 | } |
| 1033 | DEF_FLOAT_DCMASK(float32) |
| 1034 | DEF_FLOAT_DCMASK(float64) |
| 1035 | DEF_FLOAT_DCMASK(float128) |
| 1036 | |
| 1037 | /* test data class 32-bit */ |
| 1038 | uint32_t HELPER(tceb)(CPUS390XState *env, uint64_t f1, uint64_t m2) |
| 1039 | { |
| 1040 | return (m2 & float32_dcmask(env, f1)) != 0; |
| 1041 | } |
| 1042 | |
| 1043 | /* test data class 64-bit */ |
| 1044 | uint32_t HELPER(tcdb)(CPUS390XState *env, uint64_t v1, uint64_t m2) |
| 1045 | { |
| 1046 | return (m2 & float64_dcmask(env, v1)) != 0; |
| 1047 | } |
| 1048 | |
| 1049 | /* test data class 128-bit */ |
| 1050 | uint32_t HELPER(tcxb)(CPUS390XState *env, Int128 a, uint64_t m2) |
| 1051 | { |
| 1052 | return (m2 & float128_dcmask(env, ARG128(a))) != 0; |
| 1053 | } |
| 1054 | |
| 1055 | /* square root 32-bit */ |
| 1056 | uint64_t HELPER(sqeb)(CPUS390XState *env, uint64_t f2) |
| 1057 | { |
| 1058 | float32 ret = float32_sqrt(f2, &env->fpu_status); |
| 1059 | handle_exceptions(env, false, GETPC()); |
| 1060 | return ret; |
| 1061 | } |
| 1062 | |
| 1063 | /* square root 64-bit */ |
| 1064 | uint64_t HELPER(sqdb)(CPUS390XState *env, uint64_t f2) |
| 1065 | { |
| 1066 | float64 ret = float64_sqrt(f2, &env->fpu_status); |
| 1067 | handle_exceptions(env, false, GETPC()); |
| 1068 | return ret; |
| 1069 | } |
| 1070 | |
| 1071 | /* square root 128-bit */ |
| 1072 | Int128 HELPER(sqxb)(CPUS390XState *env, Int128 a) |
| 1073 | { |
| 1074 | float128 ret = float128_sqrt(ARG128(a), &env->fpu_status); |
| 1075 | handle_exceptions(env, false, GETPC()); |
| 1076 | return RET128(ret); |
| 1077 | } |
| 1078 | |
| 1079 | static const int fpc_to_rnd[8] = { |
| 1080 | float_round_nearest_even, |
| 1081 | float_round_to_zero, |
| 1082 | float_round_up, |
| 1083 | float_round_down, |
| 1084 | -1, |
| 1085 | -1, |
| 1086 | -1, |
| 1087 | float_round_to_odd, |
| 1088 | }; |
| 1089 | |
| 1090 | void cpu_s390x_load_fpc(CPUS390XState *env, uint32_t fpc) |
| 1091 | { |
| 1092 | /* |
| 1093 | * Mimic kernel fpu_lfpc_safe(): a corrupt signal frame value that would |
| 1094 | * trigger a specification exception instead results in FPC being set to 0. |
| 1095 | */ |
| 1096 | if (fpc_to_rnd[fpc & 0x7] == -1 || fpc & 0x03030088u) { |
| 1097 | fpc = 0; |
| 1098 | } |
| 1099 | env->fpc = fpc; |
| 1100 | set_float_rounding_mode(fpc_to_rnd[fpc & 0x7], &env->fpu_status); |
| 1101 | } |
| 1102 | |
| 1103 | /* set fpc */ |
| 1104 | void HELPER(sfpc)(CPUS390XState *env, uint64_t fpc) |
| 1105 | { |
| 1106 | if (fpc_to_rnd[fpc & 0x7] == -1 || fpc & 0x03030088u || |
| 1107 | (!s390_has_feat(S390_FEAT_FLOATING_POINT_EXT) && fpc & 0x4)) { |
| 1108 | tcg_s390_program_interrupt(env, PGM_SPECIFICATION, GETPC()); |
| 1109 | } |
| 1110 | cpu_s390x_load_fpc(env, fpc); |
| 1111 | } |
| 1112 | |
| 1113 | /* set fpc and signal */ |
| 1114 | void HELPER(sfas)(CPUS390XState *env, uint64_t fpc) |
| 1115 | { |
| 1116 | uint32_t signalling = env->fpc; |
| 1117 | uint32_t s390_exc; |
| 1118 | |
| 1119 | if (fpc_to_rnd[fpc & 0x7] == -1 || fpc & 0x03030088u || |
| 1120 | (!s390_has_feat(S390_FEAT_FLOATING_POINT_EXT) && fpc & 0x4)) { |
| 1121 | tcg_s390_program_interrupt(env, PGM_SPECIFICATION, GETPC()); |
| 1122 | } |
| 1123 | |
| 1124 | /* |
| 1125 | * FPC is set to the FPC operand with a bitwise OR of the signalling |
| 1126 | * flags. |
| 1127 | */ |
| 1128 | env->fpc = fpc | (signalling & 0x00ff0000); |
| 1129 | set_float_rounding_mode(fpc_to_rnd[fpc & 0x7], &env->fpu_status); |
| 1130 | |
| 1131 | /* |
| 1132 | * If any signaling flag is enabled in the new FPC mask, a |
| 1133 | * simulated-iee-exception exception occurs. |
| 1134 | */ |
| 1135 | s390_exc = (signalling >> 16) & (fpc >> 24); |
| 1136 | if (s390_exc) { |
| 1137 | if (s390_exc & S390_IEEE_MASK_INVALID) { |
| 1138 | s390_exc = S390_IEEE_MASK_INVALID; |
| 1139 | } else if (s390_exc & S390_IEEE_MASK_DIVBYZERO) { |
| 1140 | s390_exc = S390_IEEE_MASK_DIVBYZERO; |
| 1141 | } else if (s390_exc & S390_IEEE_MASK_OVERFLOW) { |
| 1142 | s390_exc &= (S390_IEEE_MASK_OVERFLOW | S390_IEEE_MASK_INEXACT); |
| 1143 | } else if (s390_exc & S390_IEEE_MASK_UNDERFLOW) { |
| 1144 | s390_exc &= (S390_IEEE_MASK_UNDERFLOW | S390_IEEE_MASK_INEXACT); |
| 1145 | } else if (s390_exc & S390_IEEE_MASK_INEXACT) { |
| 1146 | s390_exc = S390_IEEE_MASK_INEXACT; |
| 1147 | } else if (s390_exc & S390_IEEE_MASK_QUANTUM) { |
| 1148 | s390_exc = S390_IEEE_MASK_QUANTUM; |
| 1149 | } |
| 1150 | tcg_s390_data_exception(env, s390_exc | 3, GETPC()); |
| 1151 | } |
| 1152 | } |
| 1153 | |
| 1154 | /* set bfp rounding mode */ |
| 1155 | void HELPER(srnm)(CPUS390XState *env, uint64_t rnd) |
| 1156 | { |
| 1157 | if (rnd > 0x7 || fpc_to_rnd[rnd & 0x7] == -1) { |
| 1158 | tcg_s390_program_interrupt(env, PGM_SPECIFICATION, GETPC()); |
| 1159 | } |
| 1160 | |
| 1161 | env->fpc = deposit32(env->fpc, 0, 3, rnd); |
| 1162 | set_float_rounding_mode(fpc_to_rnd[rnd & 0x7], &env->fpu_status); |
| 1163 | } |