diff options
Diffstat (limited to 'target/s390x/fpu_helper.c')
| -rw-r--r-- | target/s390x/fpu_helper.c | 771 |
1 files changed, 0 insertions, 771 deletions
diff --git a/target/s390x/fpu_helper.c b/target/s390x/fpu_helper.c deleted file mode 100644 index 1b662d2520..0000000000 --- a/target/s390x/fpu_helper.c +++ /dev/null @@ -1,771 +0,0 @@ -/* - * S/390 FPU helper routines - * - * Copyright (c) 2009 Ulrich Hecht - * Copyright (c) 2009 Alexander Graf - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, see <http://www.gnu.org/licenses/>. - */ - -#include "qemu/osdep.h" -#include "cpu.h" -#include "internal.h" -#include "tcg_s390x.h" -#include "exec/exec-all.h" -#include "exec/cpu_ldst.h" -#include "exec/helper-proto.h" -#include "fpu/softfloat.h" - -/* #define DEBUG_HELPER */ -#ifdef DEBUG_HELPER -#define HELPER_LOG(x...) qemu_log(x) -#else -#define HELPER_LOG(x...) -#endif - -#define RET128(F) (env->retxl = F.low, F.high) - -#define convert_bit(mask, from, to) \ - (to < from \ - ? (mask / (from / to)) & to \ - : (mask & from) * (to / from)) - -/* Should be called after any operation that may raise IEEE exceptions. */ -static void handle_exceptions(CPUS390XState *env, uintptr_t retaddr) -{ - unsigned s390_exc, qemu_exc; - - /* Get the exceptions raised by the current operation. Reset the - fpu_status contents so that the next operation has a clean slate. */ - qemu_exc = env->fpu_status.float_exception_flags; - if (qemu_exc == 0) { - return; - } - env->fpu_status.float_exception_flags = 0; - - /* Convert softfloat exception bits to s390 exception bits. */ - s390_exc = 0; - s390_exc |= convert_bit(qemu_exc, float_flag_invalid, 0x80); - s390_exc |= convert_bit(qemu_exc, float_flag_divbyzero, 0x40); - s390_exc |= convert_bit(qemu_exc, float_flag_overflow, 0x20); - s390_exc |= convert_bit(qemu_exc, float_flag_underflow, 0x10); - s390_exc |= convert_bit(qemu_exc, float_flag_inexact, 0x08); - - /* Install the exceptions that we raised. */ - env->fpc |= s390_exc << 16; - - /* Send signals for enabled exceptions. */ - s390_exc &= env->fpc >> 24; - if (s390_exc) { - tcg_s390_data_exception(env, s390_exc, retaddr); - } -} - -static inline int float_comp_to_cc(CPUS390XState *env, int float_compare) -{ - S390CPU *cpu = s390_env_get_cpu(env); - - switch (float_compare) { - case float_relation_equal: - return 0; - case float_relation_less: - return 1; - case float_relation_greater: - return 2; - case float_relation_unordered: - return 3; - default: - cpu_abort(CPU(cpu), "unknown return value for float compare\n"); - } -} - -/* condition codes for unary FP ops */ -uint32_t set_cc_nz_f32(float32 v) -{ - if (float32_is_any_nan(v)) { - return 3; - } else if (float32_is_zero(v)) { - return 0; - } else if (float32_is_neg(v)) { - return 1; - } else { - return 2; - } -} - -uint32_t set_cc_nz_f64(float64 v) -{ - if (float64_is_any_nan(v)) { - return 3; - } else if (float64_is_zero(v)) { - return 0; - } else if (float64_is_neg(v)) { - return 1; - } else { - return 2; - } -} - -uint32_t set_cc_nz_f128(float128 v) -{ - if (float128_is_any_nan(v)) { - return 3; - } else if (float128_is_zero(v)) { - return 0; - } else if (float128_is_neg(v)) { - return 1; - } else { - return 2; - } -} - -/* 32-bit FP addition */ -uint64_t HELPER(aeb)(CPUS390XState *env, uint64_t f1, uint64_t f2) -{ - float32 ret = float32_add(f1, f2, &env->fpu_status); - handle_exceptions(env, GETPC()); - return ret; -} - -/* 64-bit FP addition */ -uint64_t HELPER(adb)(CPUS390XState *env, uint64_t f1, uint64_t f2) -{ - float64 ret = float64_add(f1, f2, &env->fpu_status); - handle_exceptions(env, GETPC()); - return ret; -} - -/* 128-bit FP addition */ -uint64_t HELPER(axb)(CPUS390XState *env, uint64_t ah, uint64_t al, - uint64_t bh, uint64_t bl) -{ - float128 ret = float128_add(make_float128(ah, al), - make_float128(bh, bl), - &env->fpu_status); - handle_exceptions(env, GETPC()); - return RET128(ret); -} - -/* 32-bit FP subtraction */ -uint64_t HELPER(seb)(CPUS390XState *env, uint64_t f1, uint64_t f2) -{ - float32 ret = float32_sub(f1, f2, &env->fpu_status); - handle_exceptions(env, GETPC()); - return ret; -} - -/* 64-bit FP subtraction */ -uint64_t HELPER(sdb)(CPUS390XState *env, uint64_t f1, uint64_t f2) -{ - float64 ret = float64_sub(f1, f2, &env->fpu_status); - handle_exceptions(env, GETPC()); - return ret; -} - -/* 128-bit FP subtraction */ -uint64_t HELPER(sxb)(CPUS390XState *env, uint64_t ah, uint64_t al, - uint64_t bh, uint64_t bl) -{ - float128 ret = float128_sub(make_float128(ah, al), - make_float128(bh, bl), - &env->fpu_status); - handle_exceptions(env, GETPC()); - return RET128(ret); -} - -/* 32-bit FP division */ -uint64_t HELPER(deb)(CPUS390XState *env, uint64_t f1, uint64_t f2) -{ - float32 ret = float32_div(f1, f2, &env->fpu_status); - handle_exceptions(env, GETPC()); - return ret; -} - -/* 64-bit FP division */ -uint64_t HELPER(ddb)(CPUS390XState *env, uint64_t f1, uint64_t f2) -{ - float64 ret = float64_div(f1, f2, &env->fpu_status); - handle_exceptions(env, GETPC()); - return ret; -} - -/* 128-bit FP division */ -uint64_t HELPER(dxb)(CPUS390XState *env, uint64_t ah, uint64_t al, - uint64_t bh, uint64_t bl) -{ - float128 ret = float128_div(make_float128(ah, al), - make_float128(bh, bl), - &env->fpu_status); - handle_exceptions(env, GETPC()); - return RET128(ret); -} - -/* 32-bit FP multiplication */ -uint64_t HELPER(meeb)(CPUS390XState *env, uint64_t f1, uint64_t f2) -{ - float32 ret = float32_mul(f1, f2, &env->fpu_status); - handle_exceptions(env, GETPC()); - return ret; -} - -/* 64-bit FP multiplication */ -uint64_t HELPER(mdb)(CPUS390XState *env, uint64_t f1, uint64_t f2) -{ - float64 ret = float64_mul(f1, f2, &env->fpu_status); - handle_exceptions(env, GETPC()); - return ret; -} - -/* 64/32-bit FP multiplication */ -uint64_t HELPER(mdeb)(CPUS390XState *env, uint64_t f1, uint64_t f2) -{ - float64 ret = float32_to_float64(f2, &env->fpu_status); - ret = float64_mul(f1, ret, &env->fpu_status); - handle_exceptions(env, GETPC()); - return ret; -} - -/* 128-bit FP multiplication */ -uint64_t HELPER(mxb)(CPUS390XState *env, uint64_t ah, uint64_t al, - uint64_t bh, uint64_t bl) -{ - float128 ret = float128_mul(make_float128(ah, al), - make_float128(bh, bl), - &env->fpu_status); - handle_exceptions(env, GETPC()); - return RET128(ret); -} - -/* 128/64-bit FP multiplication */ -uint64_t HELPER(mxdb)(CPUS390XState *env, uint64_t ah, uint64_t al, - uint64_t f2) -{ - float128 ret = float64_to_float128(f2, &env->fpu_status); - ret = float128_mul(make_float128(ah, al), ret, &env->fpu_status); - handle_exceptions(env, GETPC()); - return RET128(ret); -} - -/* convert 32-bit float to 64-bit float */ -uint64_t HELPER(ldeb)(CPUS390XState *env, uint64_t f2) -{ - float64 ret = float32_to_float64(f2, &env->fpu_status); - handle_exceptions(env, GETPC()); - return ret; -} - -/* convert 128-bit float to 64-bit float */ -uint64_t HELPER(ldxb)(CPUS390XState *env, uint64_t ah, uint64_t al) -{ - float64 ret = float128_to_float64(make_float128(ah, al), &env->fpu_status); - handle_exceptions(env, GETPC()); - return ret; -} - -/* convert 64-bit float to 128-bit float */ -uint64_t HELPER(lxdb)(CPUS390XState *env, uint64_t f2) -{ - float128 ret = float64_to_float128(f2, &env->fpu_status); - handle_exceptions(env, GETPC()); - return RET128(ret); -} - -/* convert 32-bit float to 128-bit float */ -uint64_t HELPER(lxeb)(CPUS390XState *env, uint64_t f2) -{ - float128 ret = float32_to_float128(f2, &env->fpu_status); - handle_exceptions(env, GETPC()); - return RET128(ret); -} - -/* convert 64-bit float to 32-bit float */ -uint64_t HELPER(ledb)(CPUS390XState *env, uint64_t f2) -{ - float32 ret = float64_to_float32(f2, &env->fpu_status); - handle_exceptions(env, GETPC()); - return ret; -} - -/* convert 128-bit float to 32-bit float */ -uint64_t HELPER(lexb)(CPUS390XState *env, uint64_t ah, uint64_t al) -{ - float32 ret = float128_to_float32(make_float128(ah, al), &env->fpu_status); - handle_exceptions(env, GETPC()); - return ret; -} - -/* 32-bit FP compare */ -uint32_t HELPER(ceb)(CPUS390XState *env, uint64_t f1, uint64_t f2) -{ - int cmp = float32_compare_quiet(f1, f2, &env->fpu_status); - handle_exceptions(env, GETPC()); - return float_comp_to_cc(env, cmp); -} - -/* 64-bit FP compare */ -uint32_t HELPER(cdb)(CPUS390XState *env, uint64_t f1, uint64_t f2) -{ - int cmp = float64_compare_quiet(f1, f2, &env->fpu_status); - handle_exceptions(env, GETPC()); - return float_comp_to_cc(env, cmp); -} - -/* 128-bit FP compare */ -uint32_t HELPER(cxb)(CPUS390XState *env, uint64_t ah, uint64_t al, - uint64_t bh, uint64_t bl) -{ - int cmp = float128_compare_quiet(make_float128(ah, al), - make_float128(bh, bl), - &env->fpu_status); - handle_exceptions(env, GETPC()); - return float_comp_to_cc(env, cmp); -} - -static int swap_round_mode(CPUS390XState *env, int m3) -{ - int ret = env->fpu_status.float_rounding_mode; - switch (m3) { - case 0: - /* current mode */ - break; - case 1: - /* biased round no nearest */ - case 4: - /* round to nearest */ - set_float_rounding_mode(float_round_nearest_even, &env->fpu_status); - break; - case 5: - /* round to zero */ - set_float_rounding_mode(float_round_to_zero, &env->fpu_status); - break; - case 6: - /* round to +inf */ - set_float_rounding_mode(float_round_up, &env->fpu_status); - break; - case 7: - /* round to -inf */ - set_float_rounding_mode(float_round_down, &env->fpu_status); - break; - } - return ret; -} - -/* convert 64-bit int to 32-bit float */ -uint64_t HELPER(cegb)(CPUS390XState *env, int64_t v2, uint32_t m3) -{ - int hold = swap_round_mode(env, m3); - float32 ret = int64_to_float32(v2, &env->fpu_status); - set_float_rounding_mode(hold, &env->fpu_status); - handle_exceptions(env, GETPC()); - return ret; -} - -/* convert 64-bit int to 64-bit float */ -uint64_t HELPER(cdgb)(CPUS390XState *env, int64_t v2, uint32_t m3) -{ - int hold = swap_round_mode(env, m3); - float64 ret = int64_to_float64(v2, &env->fpu_status); - set_float_rounding_mode(hold, &env->fpu_status); - handle_exceptions(env, GETPC()); - return ret; -} - -/* convert 64-bit int to 128-bit float */ -uint64_t HELPER(cxgb)(CPUS390XState *env, int64_t v2, uint32_t m3) -{ - int hold = swap_round_mode(env, m3); - float128 ret = int64_to_float128(v2, &env->fpu_status); - set_float_rounding_mode(hold, &env->fpu_status); - handle_exceptions(env, GETPC()); - return RET128(ret); -} - -/* convert 64-bit uint to 32-bit float */ -uint64_t HELPER(celgb)(CPUS390XState *env, uint64_t v2, uint32_t m3) -{ - int hold = swap_round_mode(env, m3); - float32 ret = uint64_to_float32(v2, &env->fpu_status); - set_float_rounding_mode(hold, &env->fpu_status); - handle_exceptions(env, GETPC()); - return ret; -} - -/* convert 64-bit uint to 64-bit float */ -uint64_t HELPER(cdlgb)(CPUS390XState *env, uint64_t v2, uint32_t m3) -{ - int hold = swap_round_mode(env, m3); - float64 ret = uint64_to_float64(v2, &env->fpu_status); - set_float_rounding_mode(hold, &env->fpu_status); - handle_exceptions(env, GETPC()); - return ret; -} - -/* convert 64-bit uint to 128-bit float */ -uint64_t HELPER(cxlgb)(CPUS390XState *env, uint64_t v2, uint32_t m3) -{ - int hold = swap_round_mode(env, m3); - float128 ret = uint64_to_float128(v2, &env->fpu_status); - set_float_rounding_mode(hold, &env->fpu_status); - handle_exceptions(env, GETPC()); - return RET128(ret); -} - -/* convert 32-bit float to 64-bit int */ -uint64_t HELPER(cgeb)(CPUS390XState *env, uint64_t v2, uint32_t m3) -{ - int hold = swap_round_mode(env, m3); - int64_t ret = float32_to_int64(v2, &env->fpu_status); - set_float_rounding_mode(hold, &env->fpu_status); - handle_exceptions(env, GETPC()); - return ret; -} - -/* convert 64-bit float to 64-bit int */ -uint64_t HELPER(cgdb)(CPUS390XState *env, uint64_t v2, uint32_t m3) -{ - int hold = swap_round_mode(env, m3); - int64_t ret = float64_to_int64(v2, &env->fpu_status); - set_float_rounding_mode(hold, &env->fpu_status); - handle_exceptions(env, GETPC()); - return ret; -} - -/* convert 128-bit float to 64-bit int */ -uint64_t HELPER(cgxb)(CPUS390XState *env, uint64_t h, uint64_t l, uint32_t m3) -{ - int hold = swap_round_mode(env, m3); - float128 v2 = make_float128(h, l); - int64_t ret = float128_to_int64(v2, &env->fpu_status); - set_float_rounding_mode(hold, &env->fpu_status); - handle_exceptions(env, GETPC()); - return ret; -} - -/* convert 32-bit float to 32-bit int */ -uint64_t HELPER(cfeb)(CPUS390XState *env, uint64_t v2, uint32_t m3) -{ - int hold = swap_round_mode(env, m3); - int32_t ret = float32_to_int32(v2, &env->fpu_status); - set_float_rounding_mode(hold, &env->fpu_status); - handle_exceptions(env, GETPC()); - return ret; -} - -/* convert 64-bit float to 32-bit int */ -uint64_t HELPER(cfdb)(CPUS390XState *env, uint64_t v2, uint32_t m3) -{ - int hold = swap_round_mode(env, m3); - int32_t ret = float64_to_int32(v2, &env->fpu_status); - set_float_rounding_mode(hold, &env->fpu_status); - handle_exceptions(env, GETPC()); - return ret; -} - -/* convert 128-bit float to 32-bit int */ -uint64_t HELPER(cfxb)(CPUS390XState *env, uint64_t h, uint64_t l, uint32_t m3) -{ - int hold = swap_round_mode(env, m3); - float128 v2 = make_float128(h, l); - int32_t ret = float128_to_int32(v2, &env->fpu_status); - set_float_rounding_mode(hold, &env->fpu_status); - handle_exceptions(env, GETPC()); - return ret; -} - -/* convert 32-bit float to 64-bit uint */ -uint64_t HELPER(clgeb)(CPUS390XState *env, uint64_t v2, uint32_t m3) -{ - int hold = swap_round_mode(env, m3); - uint64_t ret; - v2 = float32_to_float64(v2, &env->fpu_status); - ret = float64_to_uint64(v2, &env->fpu_status); - set_float_rounding_mode(hold, &env->fpu_status); - handle_exceptions(env, GETPC()); - return ret; -} - -/* convert 64-bit float to 64-bit uint */ -uint64_t HELPER(clgdb)(CPUS390XState *env, uint64_t v2, uint32_t m3) -{ - int hold = swap_round_mode(env, m3); - uint64_t ret = float64_to_uint64(v2, &env->fpu_status); - set_float_rounding_mode(hold, &env->fpu_status); - handle_exceptions(env, GETPC()); - return ret; -} - -/* convert 128-bit float to 64-bit uint */ -uint64_t HELPER(clgxb)(CPUS390XState *env, uint64_t h, uint64_t l, uint32_t m3) -{ - int hold = swap_round_mode(env, m3); - float128 v2 = make_float128(h, l); - /* ??? Not 100% correct. */ - uint64_t ret = float128_to_int64(v2, &env->fpu_status); - set_float_rounding_mode(hold, &env->fpu_status); - handle_exceptions(env, GETPC()); - return ret; -} - -/* convert 32-bit float to 32-bit uint */ -uint64_t HELPER(clfeb)(CPUS390XState *env, uint64_t v2, uint32_t m3) -{ - int hold = swap_round_mode(env, m3); - uint32_t ret = float32_to_uint32(v2, &env->fpu_status); - set_float_rounding_mode(hold, &env->fpu_status); - handle_exceptions(env, GETPC()); - return ret; -} - -/* convert 64-bit float to 32-bit uint */ -uint64_t HELPER(clfdb)(CPUS390XState *env, uint64_t v2, uint32_t m3) -{ - int hold = swap_round_mode(env, m3); - uint32_t ret = float64_to_uint32(v2, &env->fpu_status); - set_float_rounding_mode(hold, &env->fpu_status); - handle_exceptions(env, GETPC()); - return ret; -} - -/* convert 128-bit float to 32-bit uint */ -uint64_t HELPER(clfxb)(CPUS390XState *env, uint64_t h, uint64_t l, uint32_t m3) -{ - int hold = swap_round_mode(env, m3); - float128 v2 = make_float128(h, l); - /* Not 100% correct. */ - uint32_t ret = float128_to_int64(v2, &env->fpu_status); - set_float_rounding_mode(hold, &env->fpu_status); - handle_exceptions(env, GETPC()); - return ret; -} - -/* round to integer 32-bit */ -uint64_t HELPER(fieb)(CPUS390XState *env, uint64_t f2, uint32_t m3) -{ - int hold = swap_round_mode(env, m3); - float32 ret = float32_round_to_int(f2, &env->fpu_status); - set_float_rounding_mode(hold, &env->fpu_status); - handle_exceptions(env, GETPC()); - return ret; -} - -/* round to integer 64-bit */ -uint64_t HELPER(fidb)(CPUS390XState *env, uint64_t f2, uint32_t m3) -{ - int hold = swap_round_mode(env, m3); - float64 ret = float64_round_to_int(f2, &env->fpu_status); - set_float_rounding_mode(hold, &env->fpu_status); - handle_exceptions(env, GETPC()); - return ret; -} - -/* round to integer 128-bit */ -uint64_t HELPER(fixb)(CPUS390XState *env, uint64_t ah, uint64_t al, uint32_t m3) -{ - int hold = swap_round_mode(env, m3); - float128 ret = float128_round_to_int(make_float128(ah, al), - &env->fpu_status); - set_float_rounding_mode(hold, &env->fpu_status); - handle_exceptions(env, GETPC()); - return RET128(ret); -} - -/* 32-bit FP compare and signal */ -uint32_t HELPER(keb)(CPUS390XState *env, uint64_t f1, uint64_t f2) -{ - int cmp = float32_compare(f1, f2, &env->fpu_status); - handle_exceptions(env, GETPC()); - return float_comp_to_cc(env, cmp); -} - -/* 64-bit FP compare and signal */ -uint32_t HELPER(kdb)(CPUS390XState *env, uint64_t f1, uint64_t f2) -{ - int cmp = float64_compare(f1, f2, &env->fpu_status); - handle_exceptions(env, GETPC()); - return float_comp_to_cc(env, cmp); -} - -/* 128-bit FP compare and signal */ -uint32_t HELPER(kxb)(CPUS390XState *env, uint64_t ah, uint64_t al, - uint64_t bh, uint64_t bl) -{ - int cmp = float128_compare(make_float128(ah, al), - make_float128(bh, bl), - &env->fpu_status); - handle_exceptions(env, GETPC()); - return float_comp_to_cc(env, cmp); -} - -/* 32-bit FP multiply and add */ -uint64_t HELPER(maeb)(CPUS390XState *env, uint64_t f1, - uint64_t f2, uint64_t f3) -{ - float32 ret = float32_muladd(f2, f3, f1, 0, &env->fpu_status); - handle_exceptions(env, GETPC()); - return ret; -} - -/* 64-bit FP multiply and add */ -uint64_t HELPER(madb)(CPUS390XState *env, uint64_t f1, - uint64_t f2, uint64_t f3) -{ - float64 ret = float64_muladd(f2, f3, f1, 0, &env->fpu_status); - handle_exceptions(env, GETPC()); - return ret; -} - -/* 32-bit FP multiply and subtract */ -uint64_t HELPER(mseb)(CPUS390XState *env, uint64_t f1, - uint64_t f2, uint64_t f3) -{ - float32 ret = float32_muladd(f2, f3, f1, float_muladd_negate_c, - &env->fpu_status); - handle_exceptions(env, GETPC()); - return ret; -} - -/* 64-bit FP multiply and subtract */ -uint64_t HELPER(msdb)(CPUS390XState *env, uint64_t f1, - uint64_t f2, uint64_t f3) -{ - float64 ret = float64_muladd(f2, f3, f1, float_muladd_negate_c, - &env->fpu_status); - handle_exceptions(env, GETPC()); - return ret; -} - -/* test data class 32-bit */ -uint32_t HELPER(tceb)(CPUS390XState *env, uint64_t f1, uint64_t m2) -{ - float32 v1 = f1; - int neg = float32_is_neg(v1); - uint32_t cc = 0; - - if ((float32_is_zero(v1) && (m2 & (1 << (11-neg)))) || - (float32_is_infinity(v1) && (m2 & (1 << (5-neg)))) || - (float32_is_any_nan(v1) && (m2 & (1 << (3-neg)))) || - (float32_is_signaling_nan(v1, &env->fpu_status) && - (m2 & (1 << (1-neg))))) { - cc = 1; - } else if (m2 & (1 << (9-neg))) { - /* assume normalized number */ - cc = 1; - } - /* FIXME: denormalized? */ - return cc; -} - -/* test data class 64-bit */ -uint32_t HELPER(tcdb)(CPUS390XState *env, uint64_t v1, uint64_t m2) -{ - int neg = float64_is_neg(v1); - uint32_t cc = 0; - - if ((float64_is_zero(v1) && (m2 & (1 << (11-neg)))) || - (float64_is_infinity(v1) && (m2 & (1 << (5-neg)))) || - (float64_is_any_nan(v1) && (m2 & (1 << (3-neg)))) || - (float64_is_signaling_nan(v1, &env->fpu_status) && - (m2 & (1 << (1-neg))))) { - cc = 1; - } else if (m2 & (1 << (9-neg))) { - /* assume normalized number */ - cc = 1; - } - /* FIXME: denormalized? */ - return cc; -} - -/* test data class 128-bit */ -uint32_t HELPER(tcxb)(CPUS390XState *env, uint64_t ah, - uint64_t al, uint64_t m2) -{ - float128 v1 = make_float128(ah, al); - int neg = float128_is_neg(v1); - uint32_t cc = 0; - - if ((float128_is_zero(v1) && (m2 & (1 << (11-neg)))) || - (float128_is_infinity(v1) && (m2 & (1 << (5-neg)))) || - (float128_is_any_nan(v1) && (m2 & (1 << (3-neg)))) || - (float128_is_signaling_nan(v1, &env->fpu_status) && - (m2 & (1 << (1-neg))))) { - cc = 1; - } else if (m2 & (1 << (9-neg))) { - /* assume normalized number */ - cc = 1; - } - /* FIXME: denormalized? */ - return cc; -} - -/* square root 32-bit */ -uint64_t HELPER(sqeb)(CPUS390XState *env, uint64_t f2) -{ - float32 ret = float32_sqrt(f2, &env->fpu_status); - handle_exceptions(env, GETPC()); - return ret; -} - -/* square root 64-bit */ -uint64_t HELPER(sqdb)(CPUS390XState *env, uint64_t f2) -{ - float64 ret = float64_sqrt(f2, &env->fpu_status); - handle_exceptions(env, GETPC()); - return ret; -} - -/* square root 128-bit */ -uint64_t HELPER(sqxb)(CPUS390XState *env, uint64_t ah, uint64_t al) -{ - float128 ret = float128_sqrt(make_float128(ah, al), &env->fpu_status); - handle_exceptions(env, GETPC()); - return RET128(ret); -} - -static const int fpc_to_rnd[4] = { - float_round_nearest_even, - float_round_to_zero, - float_round_up, - float_round_down -}; - -/* set fpc */ -void HELPER(sfpc)(CPUS390XState *env, uint64_t fpc) -{ - /* Install everything in the main FPC. */ - env->fpc = fpc; - - /* Install the rounding mode in the shadow fpu_status. */ - set_float_rounding_mode(fpc_to_rnd[fpc & 3], &env->fpu_status); -} - -/* set fpc and signal */ -void HELPER(sfas)(CPUS390XState *env, uint64_t val) -{ - uint32_t signalling = env->fpc; - uint32_t source = val; - uint32_t s390_exc; - - /* The contents of the source operand are placed in the FPC register; - then the flags in the FPC register are set to the logical OR of the - signalling flags and the source flags. */ - env->fpc = source | (signalling & 0x00ff0000); - set_float_rounding_mode(fpc_to_rnd[source & 3], &env->fpu_status); - - /* If any signalling flag is 1 and the corresponding source mask - is also 1, a simulated-iee-exception trap occurs. */ - s390_exc = (signalling >> 16) & (source >> 24); - if (s390_exc) { - tcg_s390_data_exception(env, s390_exc | 3, GETPC()); - } -} |