root / target-s390x / fpu_helper.c @ 5b50e790
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/*
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* S/390 FPU helper routines
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*
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* Copyright (c) 2009 Ulrich Hecht
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* Copyright (c) 2009 Alexander Graf
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "cpu.h" |
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#include "helper.h" |
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#if !defined(CONFIG_USER_ONLY)
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#include "exec/softmmu_exec.h" |
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#endif
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/* #define DEBUG_HELPER */
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#ifdef DEBUG_HELPER
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#define HELPER_LOG(x...) qemu_log(x)
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#else
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#define HELPER_LOG(x...)
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#endif
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#define RET128(F) (env->retxl = F.low, F.high)
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#define convert_bit(mask, from, to) \
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(to < from \ |
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? (mask / (from / to)) & to \ |
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: (mask & from) * (to / from)) |
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static void ieee_exception(CPUS390XState *env, uint32_t dxc, uintptr_t retaddr) |
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{
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/* Install the DXC code. */
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env->fpc = (env->fpc & ~0xff00) | (dxc << 8); |
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/* Trap. */
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runtime_exception(env, PGM_DATA, retaddr); |
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} |
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/* Should be called after any operation that may raise IEEE exceptions. */
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static void handle_exceptions(CPUS390XState *env, uintptr_t retaddr) |
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{
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unsigned s390_exc, qemu_exc;
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/* Get the exceptions raised by the current operation. Reset the
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fpu_status contents so that the next operation has a clean slate. */
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qemu_exc = env->fpu_status.float_exception_flags; |
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if (qemu_exc == 0) { |
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return;
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} |
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env->fpu_status.float_exception_flags = 0;
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/* Convert softfloat exception bits to s390 exception bits. */
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s390_exc = 0;
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s390_exc |= convert_bit(qemu_exc, float_flag_invalid, 0x80);
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s390_exc |= convert_bit(qemu_exc, float_flag_divbyzero, 0x40);
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s390_exc |= convert_bit(qemu_exc, float_flag_overflow, 0x20);
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s390_exc |= convert_bit(qemu_exc, float_flag_underflow, 0x10);
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s390_exc |= convert_bit(qemu_exc, float_flag_inexact, 0x08);
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/* Install the exceptions that we raised. */
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env->fpc |= s390_exc << 16;
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/* Send signals for enabled exceptions. */
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s390_exc &= env->fpc >> 24;
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if (s390_exc) {
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ieee_exception(env, s390_exc, retaddr); |
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} |
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} |
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static inline int float_comp_to_cc(CPUS390XState *env, int float_compare) |
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{
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switch (float_compare) {
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case float_relation_equal:
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return 0; |
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case float_relation_less:
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return 1; |
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case float_relation_greater:
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return 2; |
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case float_relation_unordered:
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return 3; |
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default:
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cpu_abort(env, "unknown return value for float compare\n");
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} |
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} |
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/* condition codes for unary FP ops */
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uint32_t set_cc_nz_f32(float32 v) |
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{
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if (float32_is_any_nan(v)) {
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return 3; |
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} else if (float32_is_zero(v)) { |
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return 0; |
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} else if (float32_is_neg(v)) { |
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return 1; |
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} else {
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return 2; |
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} |
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} |
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uint32_t set_cc_nz_f64(float64 v) |
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{
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if (float64_is_any_nan(v)) {
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return 3; |
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} else if (float64_is_zero(v)) { |
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return 0; |
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} else if (float64_is_neg(v)) { |
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return 1; |
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} else {
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return 2; |
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} |
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} |
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uint32_t set_cc_nz_f128(float128 v) |
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{
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if (float128_is_any_nan(v)) {
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return 3; |
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} else if (float128_is_zero(v)) { |
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return 0; |
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} else if (float128_is_neg(v)) { |
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return 1; |
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} else {
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return 2; |
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} |
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} |
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/* 32-bit FP addition */
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uint64_t HELPER(aeb)(CPUS390XState *env, uint64_t f1, uint64_t f2) |
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{
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float32 ret = float32_add(f1, f2, &env->fpu_status); |
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handle_exceptions(env, GETPC()); |
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return ret;
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} |
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/* 64-bit FP addition */
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uint64_t HELPER(adb)(CPUS390XState *env, uint64_t f1, uint64_t f2) |
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{
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float64 ret = float64_add(f1, f2, &env->fpu_status); |
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handle_exceptions(env, GETPC()); |
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return ret;
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} |
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/* 128-bit FP addition */
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uint64_t HELPER(axb)(CPUS390XState *env, uint64_t ah, uint64_t al, |
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uint64_t bh, uint64_t bl) |
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{
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float128 ret = float128_add(make_float128(ah, al), |
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make_float128(bh, bl), |
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&env->fpu_status); |
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handle_exceptions(env, GETPC()); |
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return RET128(ret);
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} |
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/* 32-bit FP subtraction */
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uint64_t HELPER(seb)(CPUS390XState *env, uint64_t f1, uint64_t f2) |
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{
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float32 ret = float32_sub(f1, f2, &env->fpu_status); |
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handle_exceptions(env, GETPC()); |
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return ret;
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} |
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/* 64-bit FP subtraction */
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uint64_t HELPER(sdb)(CPUS390XState *env, uint64_t f1, uint64_t f2) |
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{
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float64 ret = float64_sub(f1, f2, &env->fpu_status); |
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handle_exceptions(env, GETPC()); |
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return ret;
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} |
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/* 128-bit FP subtraction */
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uint64_t HELPER(sxb)(CPUS390XState *env, uint64_t ah, uint64_t al, |
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uint64_t bh, uint64_t bl) |
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{
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float128 ret = float128_sub(make_float128(ah, al), |
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make_float128(bh, bl), |
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&env->fpu_status); |
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handle_exceptions(env, GETPC()); |
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return RET128(ret);
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} |
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/* 32-bit FP division */
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uint64_t HELPER(deb)(CPUS390XState *env, uint64_t f1, uint64_t f2) |
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{
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float32 ret = float32_div(f1, f2, &env->fpu_status); |
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handle_exceptions(env, GETPC()); |
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return ret;
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} |
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/* 64-bit FP division */
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uint64_t HELPER(ddb)(CPUS390XState *env, uint64_t f1, uint64_t f2) |
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{
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float64 ret = float64_div(f1, f2, &env->fpu_status); |
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handle_exceptions(env, GETPC()); |
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return ret;
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} |
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/* 128-bit FP division */
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uint64_t HELPER(dxb)(CPUS390XState *env, uint64_t ah, uint64_t al, |
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uint64_t bh, uint64_t bl) |
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{
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float128 ret = float128_div(make_float128(ah, al), |
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make_float128(bh, bl), |
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&env->fpu_status); |
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handle_exceptions(env, GETPC()); |
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return RET128(ret);
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} |
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/* 32-bit FP multiplication */
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uint64_t HELPER(meeb)(CPUS390XState *env, uint64_t f1, uint64_t f2) |
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{
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float32 ret = float32_mul(f1, f2, &env->fpu_status); |
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handle_exceptions(env, GETPC()); |
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return ret;
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} |
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/* 64-bit FP multiplication */
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uint64_t HELPER(mdb)(CPUS390XState *env, uint64_t f1, uint64_t f2) |
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{
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float64 ret = float64_mul(f1, f2, &env->fpu_status); |
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handle_exceptions(env, GETPC()); |
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return ret;
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} |
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/* 64/32-bit FP multiplication */
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uint64_t HELPER(mdeb)(CPUS390XState *env, uint64_t f1, uint64_t f2) |
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{
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float64 ret = float32_to_float64(f2, &env->fpu_status); |
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ret = float64_mul(f1, ret, &env->fpu_status); |
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handle_exceptions(env, GETPC()); |
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return ret;
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} |
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/* 128-bit FP multiplication */
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uint64_t HELPER(mxb)(CPUS390XState *env, uint64_t ah, uint64_t al, |
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uint64_t bh, uint64_t bl) |
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{
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float128 ret = float128_mul(make_float128(ah, al), |
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make_float128(bh, bl), |
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&env->fpu_status); |
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handle_exceptions(env, GETPC()); |
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return RET128(ret);
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} |
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/* 128/64-bit FP multiplication */
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uint64_t HELPER(mxdb)(CPUS390XState *env, uint64_t ah, uint64_t al, |
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uint64_t f2) |
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{
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float128 ret = float64_to_float128(f2, &env->fpu_status); |
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ret = float128_mul(make_float128(ah, al), ret, &env->fpu_status); |
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handle_exceptions(env, GETPC()); |
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return RET128(ret);
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} |
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/* convert 32-bit float to 64-bit float */
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uint64_t HELPER(ldeb)(CPUS390XState *env, uint64_t f2) |
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{
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float64 ret = float32_to_float64(f2, &env->fpu_status); |
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handle_exceptions(env, GETPC()); |
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return ret;
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} |
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/* convert 128-bit float to 64-bit float */
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uint64_t HELPER(ldxb)(CPUS390XState *env, uint64_t ah, uint64_t al) |
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{
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float64 ret = float128_to_float64(make_float128(ah, al), &env->fpu_status); |
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handle_exceptions(env, GETPC()); |
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return ret;
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} |
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/* convert 64-bit float to 128-bit float */
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uint64_t HELPER(lxdb)(CPUS390XState *env, uint64_t f2) |
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{
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float128 ret = float64_to_float128(f2, &env->fpu_status); |
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handle_exceptions(env, GETPC()); |
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return RET128(ret);
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} |
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/* convert 32-bit float to 128-bit float */
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uint64_t HELPER(lxeb)(CPUS390XState *env, uint64_t f2) |
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{
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float128 ret = float32_to_float128(f2, &env->fpu_status); |
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handle_exceptions(env, GETPC()); |
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return RET128(ret);
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} |
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/* convert 64-bit float to 32-bit float */
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uint64_t HELPER(ledb)(CPUS390XState *env, uint64_t f2) |
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{
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float32 ret = float64_to_float32(f2, &env->fpu_status); |
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handle_exceptions(env, GETPC()); |
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return ret;
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} |
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/* convert 128-bit float to 32-bit float */
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uint64_t HELPER(lexb)(CPUS390XState *env, uint64_t ah, uint64_t al) |
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{
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float32 ret = float128_to_float32(make_float128(ah, al), &env->fpu_status); |
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handle_exceptions(env, GETPC()); |
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return ret;
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} |
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/* 32-bit FP compare */
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uint32_t HELPER(ceb)(CPUS390XState *env, uint64_t f1, uint64_t f2) |
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{
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int cmp = float32_compare_quiet(f1, f2, &env->fpu_status);
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handle_exceptions(env, GETPC()); |
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return float_comp_to_cc(env, cmp);
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} |
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/* 64-bit FP compare */
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uint32_t HELPER(cdb)(CPUS390XState *env, uint64_t f1, uint64_t f2) |
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{
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int cmp = float64_compare_quiet(f1, f2, &env->fpu_status);
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handle_exceptions(env, GETPC()); |
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return float_comp_to_cc(env, cmp);
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} |
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/* 128-bit FP compare */
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uint32_t HELPER(cxb)(CPUS390XState *env, uint64_t ah, uint64_t al, |
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uint64_t bh, uint64_t bl) |
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{
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int cmp = float128_compare_quiet(make_float128(ah, al),
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make_float128(bh, bl), |
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&env->fpu_status); |
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handle_exceptions(env, GETPC()); |
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return float_comp_to_cc(env, cmp);
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} |
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static int swap_round_mode(CPUS390XState *env, int m3) |
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{
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int ret = env->fpu_status.float_rounding_mode;
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switch (m3) {
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case 0: |
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/* current mode */
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break;
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case 1: |
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/* biased round no nearest */
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case 4: |
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/* round to nearest */
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set_float_rounding_mode(float_round_nearest_even, &env->fpu_status); |
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break;
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case 5: |
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/* round to zero */
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set_float_rounding_mode(float_round_to_zero, &env->fpu_status); |
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break;
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case 6: |
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/* round to +inf */
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set_float_rounding_mode(float_round_up, &env->fpu_status); |
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break;
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case 7: |
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/* round to -inf */
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set_float_rounding_mode(float_round_down, &env->fpu_status); |
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break;
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} |
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return ret;
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} |
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|
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/* convert 64-bit int to 32-bit float */
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uint64_t HELPER(cegb)(CPUS390XState *env, int64_t v2, uint32_t m3) |
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{
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int hold = swap_round_mode(env, m3);
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float32 ret = int64_to_float32(v2, &env->fpu_status); |
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set_float_rounding_mode(hold, &env->fpu_status); |
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handle_exceptions(env, GETPC()); |
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return ret;
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} |
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|
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/* convert 64-bit int to 64-bit float */
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uint64_t HELPER(cdgb)(CPUS390XState *env, int64_t v2, uint32_t m3) |
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{
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int hold = swap_round_mode(env, m3);
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float64 ret = int64_to_float64(v2, &env->fpu_status); |
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set_float_rounding_mode(hold, &env->fpu_status); |
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handle_exceptions(env, GETPC()); |
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return ret;
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} |
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|
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/* convert 64-bit int to 128-bit float */
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uint64_t HELPER(cxgb)(CPUS390XState *env, int64_t v2, uint32_t m3) |
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{
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int hold = swap_round_mode(env, m3);
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float128 ret = int64_to_float128(v2, &env->fpu_status); |
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set_float_rounding_mode(hold, &env->fpu_status); |
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handle_exceptions(env, GETPC()); |
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return RET128(ret);
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} |
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|
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/* convert 64-bit uint to 32-bit float */
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uint64_t HELPER(celgb)(CPUS390XState *env, uint64_t v2, uint32_t m3) |
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{
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int hold = swap_round_mode(env, m3);
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float32 ret = uint64_to_float32(v2, &env->fpu_status); |
| 403 |
set_float_rounding_mode(hold, &env->fpu_status); |
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handle_exceptions(env, GETPC()); |
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return ret;
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} |
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|
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/* convert 64-bit uint to 64-bit float */
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uint64_t HELPER(cdlgb)(CPUS390XState *env, uint64_t v2, uint32_t m3) |
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{
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int hold = swap_round_mode(env, m3);
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float64 ret = uint64_to_float64(v2, &env->fpu_status); |
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set_float_rounding_mode(hold, &env->fpu_status); |
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handle_exceptions(env, GETPC()); |
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return ret;
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} |
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|
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/* convert 64-bit uint to 128-bit float */
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uint64_t HELPER(cxlgb)(CPUS390XState *env, uint64_t v2, uint32_t m3) |
| 420 |
{
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| 421 |
int hold = swap_round_mode(env, m3);
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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);
|
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} |
| 427 |
|
| 428 |
/* convert 32-bit float to 64-bit int */
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uint64_t HELPER(cgeb)(CPUS390XState *env, uint64_t v2, uint32_t m3) |
| 430 |
{
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int hold = swap_round_mode(env, m3);
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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;
|
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} |
| 437 |
|
| 438 |
/* convert 64-bit float to 64-bit int */
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uint64_t HELPER(cgdb)(CPUS390XState *env, uint64_t v2, uint32_t m3) |
| 440 |
{
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| 441 |
int hold = swap_round_mode(env, m3);
|
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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;
|
| 446 |
} |
| 447 |
|
| 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) |
| 450 |
{
|
| 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;
|
| 457 |
} |
| 458 |
|
| 459 |
/* convert 32-bit float to 32-bit int */
|
| 460 |
uint64_t HELPER(cfeb)(CPUS390XState *env, uint64_t v2, uint32_t m3) |
| 461 |
{
|
| 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;
|
| 467 |
} |
| 468 |
|
| 469 |
/* convert 64-bit float to 32-bit int */
|
| 470 |
uint64_t HELPER(cfdb)(CPUS390XState *env, uint64_t v2, uint32_t m3) |
| 471 |
{
|
| 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;
|
| 477 |
} |
| 478 |
|
| 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) |
| 481 |
{
|
| 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;
|
| 488 |
} |
| 489 |
|
| 490 |
/* convert 32-bit float to 64-bit uint */
|
| 491 |
uint64_t HELPER(clgeb)(CPUS390XState *env, uint64_t v2, uint32_t m3) |
| 492 |
{
|
| 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;
|
| 500 |
} |
| 501 |
|
| 502 |
/* convert 64-bit float to 64-bit uint */
|
| 503 |
uint64_t HELPER(clgdb)(CPUS390XState *env, uint64_t v2, uint32_t m3) |
| 504 |
{
|
| 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;
|
| 510 |
} |
| 511 |
|
| 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) |
| 514 |
{
|
| 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;
|
| 522 |
} |
| 523 |
|
| 524 |
/* convert 32-bit float to 32-bit uint */
|
| 525 |
uint64_t HELPER(clfeb)(CPUS390XState *env, uint64_t v2, uint32_t m3) |
| 526 |
{
|
| 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;
|
| 532 |
} |
| 533 |
|
| 534 |
/* convert 64-bit float to 32-bit uint */
|
| 535 |
uint64_t HELPER(clfdb)(CPUS390XState *env, uint64_t v2, uint32_t m3) |
| 536 |
{
|
| 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;
|
| 542 |
} |
| 543 |
|
| 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) |
| 546 |
{
|
| 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;
|
| 554 |
} |
| 555 |
|
| 556 |
/* 32-bit FP multiply and add */
|
| 557 |
uint64_t HELPER(maeb)(CPUS390XState *env, uint64_t f1, |
| 558 |
uint64_t f2, uint64_t f3) |
| 559 |
{
|
| 560 |
float32 ret = float32_muladd(f2, f3, f1, 0, &env->fpu_status);
|
| 561 |
handle_exceptions(env, GETPC()); |
| 562 |
return ret;
|
| 563 |
} |
| 564 |
|
| 565 |
/* 64-bit FP multiply and add */
|
| 566 |
uint64_t HELPER(madb)(CPUS390XState *env, uint64_t f1, |
| 567 |
uint64_t f2, uint64_t f3) |
| 568 |
{
|
| 569 |
float64 ret = float64_muladd(f2, f3, f1, 0, &env->fpu_status);
|
| 570 |
handle_exceptions(env, GETPC()); |
| 571 |
return ret;
|
| 572 |
} |
| 573 |
|
| 574 |
/* 32-bit FP multiply and subtract */
|
| 575 |
uint64_t HELPER(mseb)(CPUS390XState *env, uint64_t f1, |
| 576 |
uint64_t f2, uint64_t f3) |
| 577 |
{
|
| 578 |
float32 ret = float32_muladd(f2, f3, f1, float_muladd_negate_c, |
| 579 |
&env->fpu_status); |
| 580 |
handle_exceptions(env, GETPC()); |
| 581 |
return ret;
|
| 582 |
} |
| 583 |
|
| 584 |
/* 64-bit FP multiply and subtract */
|
| 585 |
uint64_t HELPER(msdb)(CPUS390XState *env, uint64_t f1, |
| 586 |
uint64_t f2, uint64_t f3) |
| 587 |
{
|
| 588 |
float64 ret = float64_muladd(f2, f3, f1, float_muladd_negate_c, |
| 589 |
&env->fpu_status); |
| 590 |
handle_exceptions(env, GETPC()); |
| 591 |
return ret;
|
| 592 |
} |
| 593 |
|
| 594 |
/* test data class 32-bit */
|
| 595 |
uint32_t HELPER(tceb)(uint64_t f1, uint64_t m2) |
| 596 |
{
|
| 597 |
float32 v1 = f1; |
| 598 |
int neg = float32_is_neg(v1);
|
| 599 |
uint32_t cc = 0;
|
| 600 |
|
| 601 |
if ((float32_is_zero(v1) && (m2 & (1 << (11-neg)))) || |
| 602 |
(float32_is_infinity(v1) && (m2 & (1 << (5-neg)))) || |
| 603 |
(float32_is_any_nan(v1) && (m2 & (1 << (3-neg)))) || |
| 604 |
(float32_is_signaling_nan(v1) && (m2 & (1 << (1-neg))))) { |
| 605 |
cc = 1;
|
| 606 |
} else if (m2 & (1 << (9-neg))) { |
| 607 |
/* assume normalized number */
|
| 608 |
cc = 1;
|
| 609 |
} |
| 610 |
/* FIXME: denormalized? */
|
| 611 |
return cc;
|
| 612 |
} |
| 613 |
|
| 614 |
/* test data class 64-bit */
|
| 615 |
uint32_t HELPER(tcdb)(uint64_t v1, uint64_t m2) |
| 616 |
{
|
| 617 |
int neg = float64_is_neg(v1);
|
| 618 |
uint32_t cc = 0;
|
| 619 |
|
| 620 |
if ((float64_is_zero(v1) && (m2 & (1 << (11-neg)))) || |
| 621 |
(float64_is_infinity(v1) && (m2 & (1 << (5-neg)))) || |
| 622 |
(float64_is_any_nan(v1) && (m2 & (1 << (3-neg)))) || |
| 623 |
(float64_is_signaling_nan(v1) && (m2 & (1 << (1-neg))))) { |
| 624 |
cc = 1;
|
| 625 |
} else if (m2 & (1 << (9-neg))) { |
| 626 |
/* assume normalized number */
|
| 627 |
cc = 1;
|
| 628 |
} |
| 629 |
/* FIXME: denormalized? */
|
| 630 |
return cc;
|
| 631 |
} |
| 632 |
|
| 633 |
/* test data class 128-bit */
|
| 634 |
uint32_t HELPER(tcxb)(uint64_t ah, uint64_t al, uint64_t m2) |
| 635 |
{
|
| 636 |
float128 v1 = make_float128(ah, al); |
| 637 |
int neg = float128_is_neg(v1);
|
| 638 |
uint32_t cc = 0;
|
| 639 |
|
| 640 |
if ((float128_is_zero(v1) && (m2 & (1 << (11-neg)))) || |
| 641 |
(float128_is_infinity(v1) && (m2 & (1 << (5-neg)))) || |
| 642 |
(float128_is_any_nan(v1) && (m2 & (1 << (3-neg)))) || |
| 643 |
(float128_is_signaling_nan(v1) && (m2 & (1 << (1-neg))))) { |
| 644 |
cc = 1;
|
| 645 |
} else if (m2 & (1 << (9-neg))) { |
| 646 |
/* assume normalized number */
|
| 647 |
cc = 1;
|
| 648 |
} |
| 649 |
/* FIXME: denormalized? */
|
| 650 |
return cc;
|
| 651 |
} |
| 652 |
|
| 653 |
/* square root 32-bit */
|
| 654 |
uint64_t HELPER(sqeb)(CPUS390XState *env, uint64_t f2) |
| 655 |
{
|
| 656 |
float32 ret = float32_sqrt(f2, &env->fpu_status); |
| 657 |
handle_exceptions(env, GETPC()); |
| 658 |
return ret;
|
| 659 |
} |
| 660 |
|
| 661 |
/* square root 64-bit */
|
| 662 |
uint64_t HELPER(sqdb)(CPUS390XState *env, uint64_t f2) |
| 663 |
{
|
| 664 |
float64 ret = float64_sqrt(f2, &env->fpu_status); |
| 665 |
handle_exceptions(env, GETPC()); |
| 666 |
return ret;
|
| 667 |
} |
| 668 |
|
| 669 |
/* square root 128-bit */
|
| 670 |
uint64_t HELPER(sqxb)(CPUS390XState *env, uint64_t ah, uint64_t al) |
| 671 |
{
|
| 672 |
float128 ret = float128_sqrt(make_float128(ah, al), &env->fpu_status); |
| 673 |
handle_exceptions(env, GETPC()); |
| 674 |
return RET128(ret);
|
| 675 |
} |
| 676 |
|
| 677 |
static const int fpc_to_rnd[4] = { |
| 678 |
float_round_nearest_even, |
| 679 |
float_round_to_zero, |
| 680 |
float_round_up, |
| 681 |
float_round_down |
| 682 |
}; |
| 683 |
|
| 684 |
/* set fpc */
|
| 685 |
void HELPER(sfpc)(CPUS390XState *env, uint64_t fpc)
|
| 686 |
{
|
| 687 |
/* Install everything in the main FPC. */
|
| 688 |
env->fpc = fpc; |
| 689 |
|
| 690 |
/* Install the rounding mode in the shadow fpu_status. */
|
| 691 |
set_float_rounding_mode(fpc_to_rnd[fpc & 3], &env->fpu_status);
|
| 692 |
} |
| 693 |
|
| 694 |
/* set fpc and signal */
|
| 695 |
void HELPER(sfas)(CPUS390XState *env, uint64_t val)
|
| 696 |
{
|
| 697 |
uint32_t signalling = env->fpc; |
| 698 |
uint32_t source = val; |
| 699 |
uint32_t s390_exc; |
| 700 |
|
| 701 |
/* The contents of the source operand are placed in the FPC register;
|
| 702 |
then the flags in the FPC register are set to the logical OR of the
|
| 703 |
signalling flags and the source flags. */
|
| 704 |
env->fpc = source | (signalling & 0x00ff0000);
|
| 705 |
set_float_rounding_mode(fpc_to_rnd[source & 3], &env->fpu_status);
|
| 706 |
|
| 707 |
/* If any signalling flag is 1 and the corresponding source mask
|
| 708 |
is also 1, a simulated-iee-exception trap occurs. */
|
| 709 |
s390_exc = (signalling >> 16) & (source >> 24); |
| 710 |
if (s390_exc) {
|
| 711 |
ieee_exception(env, s390_exc | 3, GETPC());
|
| 712 |
} |
| 713 |
} |