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113 lines
3 KiB
C
113 lines
3 KiB
C
/*
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* m68k FPU helpers
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*
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* Copyright (c) 2006-2007 CodeSourcery
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* Written by Paul Brook
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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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* 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 "qemu/osdep.h"
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#include "cpu.h"
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#include "exec/helper-proto.h"
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uint32_t HELPER(f64_to_i32)(CPUM68KState *env, float64 val)
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{
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return float64_to_int32(val, &env->fp_status);
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}
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float32 HELPER(f64_to_f32)(CPUM68KState *env, float64 val)
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{
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return float64_to_float32(val, &env->fp_status);
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}
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float64 HELPER(i32_to_f64)(CPUM68KState *env, uint32_t val)
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{
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return int32_to_float64(val, &env->fp_status);
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}
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float64 HELPER(f32_to_f64)(CPUM68KState *env, float32 val)
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{
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return float32_to_float64(val, &env->fp_status);
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}
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float64 HELPER(iround_f64)(CPUM68KState *env, float64 val)
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{
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return float64_round_to_int(val, &env->fp_status);
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}
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float64 HELPER(itrunc_f64)(CPUM68KState *env, float64 val)
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{
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return float64_trunc_to_int(val, &env->fp_status);
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}
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float64 HELPER(sqrt_f64)(CPUM68KState *env, float64 val)
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{
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return float64_sqrt(val, &env->fp_status);
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}
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float64 HELPER(abs_f64)(float64 val)
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{
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return float64_abs(val);
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}
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float64 HELPER(chs_f64)(float64 val)
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{
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return float64_chs(val);
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}
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float64 HELPER(add_f64)(CPUM68KState *env, float64 a, float64 b)
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{
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return float64_add(a, b, &env->fp_status);
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}
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float64 HELPER(sub_f64)(CPUM68KState *env, float64 a, float64 b)
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{
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return float64_sub(a, b, &env->fp_status);
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}
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float64 HELPER(mul_f64)(CPUM68KState *env, float64 a, float64 b)
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{
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return float64_mul(a, b, &env->fp_status);
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}
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float64 HELPER(div_f64)(CPUM68KState *env, float64 a, float64 b)
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{
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return float64_div(a, b, &env->fp_status);
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}
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float64 HELPER(sub_cmp_f64)(CPUM68KState *env, float64 a, float64 b)
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{
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/* ??? This may incorrectly raise exceptions. */
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/* ??? Should flush denormals to zero. */
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float64 res;
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res = float64_sub(a, b, &env->fp_status);
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if (float64_is_quiet_nan(res, &env->fp_status)) {
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/* +/-inf compares equal against itself, but sub returns nan. */
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if (!float64_is_quiet_nan(a, &env->fp_status)
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&& !float64_is_quiet_nan(b, &env->fp_status)) {
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res = float64_zero;
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if (float64_lt_quiet(a, res, &env->fp_status)) {
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res = float64_chs(res);
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}
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}
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}
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return res;
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}
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uint32_t HELPER(compare_f64)(CPUM68KState *env, float64 val)
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{
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return float64_compare_quiet(val, float64_zero, &env->fp_status);
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}
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