468 lines
15 KiB
C
468 lines
15 KiB
C
/*
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* FPU op helpers
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*
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* Copyright (c) 2003-2005 Fabrice Bellard
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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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#define QT0 (env->qt0)
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#define QT1 (env->qt1)
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static void check_ieee_exceptions(CPUSPARCState *env)
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{
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target_ulong status;
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status = get_float_exception_flags(&env->fp_status);
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if (status) {
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/* Copy IEEE 754 flags into FSR */
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if (status & float_flag_invalid) {
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env->fsr |= FSR_NVC;
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}
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if (status & float_flag_overflow) {
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env->fsr |= FSR_OFC;
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}
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if (status & float_flag_underflow) {
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env->fsr |= FSR_UFC;
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}
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if (status & float_flag_divbyzero) {
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env->fsr |= FSR_DZC;
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}
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if (status & float_flag_inexact) {
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env->fsr |= FSR_NXC;
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}
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if ((env->fsr & FSR_CEXC_MASK) & ((env->fsr & FSR_TEM_MASK) >> 23)) {
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/* Unmasked exception, generate a trap */
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env->fsr |= FSR_FTT_IEEE_EXCP;
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helper_raise_exception(env, TT_FP_EXCP);
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} else {
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/* Accumulate exceptions */
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env->fsr |= (env->fsr & FSR_CEXC_MASK) << 5;
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}
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}
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}
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static inline void clear_float_exceptions(CPUSPARCState *env)
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{
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set_float_exception_flags(0, &env->fp_status);
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}
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#define F_HELPER(name, p) void helper_f##name##p(CPUSPARCState *env)
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#define F_BINOP(name) \
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float32 helper_f ## name ## s (CPUSPARCState *env, float32 src1, \
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float32 src2) \
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{ \
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float32 ret; \
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clear_float_exceptions(env); \
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ret = float32_ ## name (src1, src2, &env->fp_status); \
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check_ieee_exceptions(env); \
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return ret; \
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} \
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float64 helper_f ## name ## d (CPUSPARCState * env, float64 src1,\
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float64 src2) \
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{ \
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float64 ret; \
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clear_float_exceptions(env); \
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ret = float64_ ## name (src1, src2, &env->fp_status); \
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check_ieee_exceptions(env); \
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return ret; \
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} \
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F_HELPER(name, q) \
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{ \
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clear_float_exceptions(env); \
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QT0 = float128_ ## name (QT0, QT1, &env->fp_status); \
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check_ieee_exceptions(env); \
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}
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F_BINOP(add);
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F_BINOP(sub);
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F_BINOP(mul);
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F_BINOP(div);
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#undef F_BINOP
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float64 helper_fsmuld(CPUSPARCState *env, float32 src1, float32 src2)
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{
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float64 ret;
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clear_float_exceptions(env);
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ret = float64_mul(float32_to_float64(src1, &env->fp_status),
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float32_to_float64(src2, &env->fp_status),
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&env->fp_status);
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check_ieee_exceptions(env);
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return ret;
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}
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void helper_fdmulq(CPUSPARCState *env, float64 src1, float64 src2)
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{
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clear_float_exceptions(env);
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QT0 = float128_mul(float64_to_float128(src1, &env->fp_status),
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float64_to_float128(src2, &env->fp_status),
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&env->fp_status);
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check_ieee_exceptions(env);
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}
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float32 helper_fnegs(float32 src)
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{
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return float32_chs(src);
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}
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#ifdef TARGET_SPARC64
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float64 helper_fnegd(float64 src)
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{
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return float64_chs(src);
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}
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F_HELPER(neg, q)
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{
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QT0 = float128_chs(QT1);
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}
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#endif
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/* Integer to float conversion. */
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float32 helper_fitos(CPUSPARCState *env, int32_t src)
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{
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/* Inexact error possible converting int to float. */
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float32 ret;
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clear_float_exceptions(env);
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ret = int32_to_float32(src, &env->fp_status);
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check_ieee_exceptions(env);
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return ret;
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}
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float64 helper_fitod(CPUSPARCState *env, int32_t src)
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{
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/* No possible exceptions converting int to double. */
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return int32_to_float64(src, &env->fp_status);
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}
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void helper_fitoq(CPUSPARCState *env, int32_t src)
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{
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/* No possible exceptions converting int to long double. */
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QT0 = int32_to_float128(src, &env->fp_status);
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}
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#ifdef TARGET_SPARC64
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float32 helper_fxtos(CPUSPARCState *env, int64_t src)
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{
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float32 ret;
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clear_float_exceptions(env);
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ret = int64_to_float32(src, &env->fp_status);
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check_ieee_exceptions(env);
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return ret;
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}
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float64 helper_fxtod(CPUSPARCState *env, int64_t src)
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{
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float64 ret;
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clear_float_exceptions(env);
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ret = int64_to_float64(src, &env->fp_status);
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check_ieee_exceptions(env);
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return ret;
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}
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void helper_fxtoq(CPUSPARCState *env, int64_t src)
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{
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/* No possible exceptions converting long long to long double. */
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QT0 = int64_to_float128(src, &env->fp_status);
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}
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#endif
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#undef F_HELPER
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/* floating point conversion */
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float32 helper_fdtos(CPUSPARCState *env, float64 src)
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{
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float32 ret;
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clear_float_exceptions(env);
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ret = float64_to_float32(src, &env->fp_status);
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check_ieee_exceptions(env);
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return ret;
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}
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float64 helper_fstod(CPUSPARCState *env, float32 src)
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{
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float64 ret;
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clear_float_exceptions(env);
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ret = float32_to_float64(src, &env->fp_status);
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check_ieee_exceptions(env);
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return ret;
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}
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float32 helper_fqtos(CPUSPARCState *env)
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{
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float32 ret;
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clear_float_exceptions(env);
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ret = float128_to_float32(QT1, &env->fp_status);
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check_ieee_exceptions(env);
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return ret;
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}
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void helper_fstoq(CPUSPARCState *env, float32 src)
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{
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clear_float_exceptions(env);
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QT0 = float32_to_float128(src, &env->fp_status);
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check_ieee_exceptions(env);
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}
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float64 helper_fqtod(CPUSPARCState *env)
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{
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float64 ret;
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clear_float_exceptions(env);
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ret = float128_to_float64(QT1, &env->fp_status);
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check_ieee_exceptions(env);
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return ret;
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}
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void helper_fdtoq(CPUSPARCState *env, float64 src)
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{
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clear_float_exceptions(env);
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QT0 = float64_to_float128(src, &env->fp_status);
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check_ieee_exceptions(env);
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}
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/* Float to integer conversion. */
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int32_t helper_fstoi(CPUSPARCState *env, float32 src)
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{
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int32_t ret;
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clear_float_exceptions(env);
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ret = float32_to_int32_round_to_zero(src, &env->fp_status);
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check_ieee_exceptions(env);
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return ret;
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}
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int32_t helper_fdtoi(CPUSPARCState *env, float64 src)
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{
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int32_t ret;
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clear_float_exceptions(env);
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ret = float64_to_int32_round_to_zero(src, &env->fp_status);
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check_ieee_exceptions(env);
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return ret;
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}
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int32_t helper_fqtoi(CPUSPARCState *env)
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{
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int32_t ret;
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clear_float_exceptions(env);
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ret = float128_to_int32_round_to_zero(QT1, &env->fp_status);
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check_ieee_exceptions(env);
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return ret;
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}
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#ifdef TARGET_SPARC64
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int64_t helper_fstox(CPUSPARCState *env, float32 src)
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{
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int64_t ret;
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clear_float_exceptions(env);
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ret = float32_to_int64_round_to_zero(src, &env->fp_status);
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check_ieee_exceptions(env);
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return ret;
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}
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int64_t helper_fdtox(CPUSPARCState *env, float64 src)
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{
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int64_t ret;
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clear_float_exceptions(env);
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ret = float64_to_int64_round_to_zero(src, &env->fp_status);
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check_ieee_exceptions(env);
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return ret;
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}
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int64_t helper_fqtox(CPUSPARCState *env)
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{
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int64_t ret;
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clear_float_exceptions(env);
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ret = float128_to_int64_round_to_zero(QT1, &env->fp_status);
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check_ieee_exceptions(env);
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return ret;
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}
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#endif
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float32 helper_fabss(float32 src)
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{
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return float32_abs(src);
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}
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#ifdef TARGET_SPARC64
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float64 helper_fabsd(float64 src)
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{
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return float64_abs(src);
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}
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void helper_fabsq(CPUSPARCState *env)
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{
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QT0 = float128_abs(QT1);
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}
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#endif
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float32 helper_fsqrts(CPUSPARCState *env, float32 src)
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{
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float32 ret;
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clear_float_exceptions(env);
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ret = float32_sqrt(src, &env->fp_status);
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check_ieee_exceptions(env);
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return ret;
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}
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float64 helper_fsqrtd(CPUSPARCState *env, float64 src)
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{
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float64 ret;
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clear_float_exceptions(env);
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ret = float64_sqrt(src, &env->fp_status);
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check_ieee_exceptions(env);
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return ret;
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}
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void helper_fsqrtq(CPUSPARCState *env)
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{
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clear_float_exceptions(env);
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QT0 = float128_sqrt(QT1, &env->fp_status);
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check_ieee_exceptions(env);
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}
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#define GEN_FCMP(name, size, reg1, reg2, FS, E) \
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void glue(helper_, name) (CPUSPARCState *env) \
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{ \
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int ret; \
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clear_float_exceptions(env); \
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if (E) { \
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ret = glue(size, _compare)(reg1, reg2, &env->fp_status); \
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} else { \
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ret = glue(size, _compare_quiet)(reg1, reg2, \
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&env->fp_status); \
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} \
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check_ieee_exceptions(env); \
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switch (ret) { \
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case float_relation_unordered: \
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env->fsr |= (FSR_FCC1 | FSR_FCC0) << FS; \
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env->fsr |= FSR_NVA; \
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break; \
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case float_relation_less: \
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env->fsr &= ~(FSR_FCC1) << FS; \
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env->fsr |= FSR_FCC0 << FS; \
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break; \
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case float_relation_greater: \
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env->fsr &= ~(FSR_FCC0) << FS; \
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env->fsr |= FSR_FCC1 << FS; \
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break; \
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default: \
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env->fsr &= ~((FSR_FCC1 | FSR_FCC0) << FS); \
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break; \
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} \
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}
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#define GEN_FCMP_T(name, size, FS, E) \
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void glue(helper_, name)(CPUSPARCState *env, size src1, size src2) \
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{ \
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int ret; \
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clear_float_exceptions(env); \
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if (E) { \
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ret = glue(size, _compare)(src1, src2, &env->fp_status); \
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} else { \
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ret = glue(size, _compare_quiet)(src1, src2, \
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&env->fp_status); \
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} \
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check_ieee_exceptions(env); \
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switch (ret) { \
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case float_relation_unordered: \
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env->fsr |= (FSR_FCC1 | FSR_FCC0) << FS; \
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break; \
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case float_relation_less: \
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env->fsr &= ~(FSR_FCC1 << FS); \
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env->fsr |= FSR_FCC0 << FS; \
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break; \
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case float_relation_greater: \
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env->fsr &= ~(FSR_FCC0 << FS); \
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env->fsr |= FSR_FCC1 << FS; \
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break; \
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default: \
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env->fsr &= ~((FSR_FCC1 | FSR_FCC0) << FS); \
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break; \
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} \
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}
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GEN_FCMP_T(fcmps, float32, 0, 0);
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GEN_FCMP_T(fcmpd, float64, 0, 0);
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GEN_FCMP_T(fcmpes, float32, 0, 1);
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GEN_FCMP_T(fcmped, float64, 0, 1);
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GEN_FCMP(fcmpq, float128, QT0, QT1, 0, 0);
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GEN_FCMP(fcmpeq, float128, QT0, QT1, 0, 1);
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#ifdef TARGET_SPARC64
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GEN_FCMP_T(fcmps_fcc1, float32, 22, 0);
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GEN_FCMP_T(fcmpd_fcc1, float64, 22, 0);
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GEN_FCMP(fcmpq_fcc1, float128, QT0, QT1, 22, 0);
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GEN_FCMP_T(fcmps_fcc2, float32, 24, 0);
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GEN_FCMP_T(fcmpd_fcc2, float64, 24, 0);
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GEN_FCMP(fcmpq_fcc2, float128, QT0, QT1, 24, 0);
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GEN_FCMP_T(fcmps_fcc3, float32, 26, 0);
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GEN_FCMP_T(fcmpd_fcc3, float64, 26, 0);
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GEN_FCMP(fcmpq_fcc3, float128, QT0, QT1, 26, 0);
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GEN_FCMP_T(fcmpes_fcc1, float32, 22, 1);
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GEN_FCMP_T(fcmped_fcc1, float64, 22, 1);
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GEN_FCMP(fcmpeq_fcc1, float128, QT0, QT1, 22, 1);
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GEN_FCMP_T(fcmpes_fcc2, float32, 24, 1);
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GEN_FCMP_T(fcmped_fcc2, float64, 24, 1);
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GEN_FCMP(fcmpeq_fcc2, float128, QT0, QT1, 24, 1);
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GEN_FCMP_T(fcmpes_fcc3, float32, 26, 1);
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GEN_FCMP_T(fcmped_fcc3, float64, 26, 1);
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GEN_FCMP(fcmpeq_fcc3, float128, QT0, QT1, 26, 1);
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#endif
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#undef GEN_FCMP_T
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#undef GEN_FCMP
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static inline void set_fsr(CPUSPARCState *env)
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{
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int rnd_mode;
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switch (env->fsr & FSR_RD_MASK) {
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case FSR_RD_NEAREST:
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rnd_mode = float_round_nearest_even;
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break;
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default:
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case FSR_RD_ZERO:
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rnd_mode = float_round_to_zero;
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break;
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case FSR_RD_POS:
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rnd_mode = float_round_up;
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break;
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case FSR_RD_NEG:
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rnd_mode = float_round_down;
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break;
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}
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set_float_rounding_mode(rnd_mode, &env->fp_status);
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}
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void helper_ldfsr(CPUSPARCState *env, uint32_t new_fsr)
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{
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env->fsr = (new_fsr & FSR_LDFSR_MASK) | (env->fsr & FSR_LDFSR_OLDMASK);
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set_fsr(env);
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}
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#ifdef TARGET_SPARC64
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void helper_ldxfsr(CPUSPARCState *env, uint64_t new_fsr)
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{
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env->fsr = (new_fsr & FSR_LDXFSR_MASK) | (env->fsr & FSR_LDXFSR_OLDMASK);
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set_fsr(env);
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}
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#endif
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