451 lines
12 KiB
C
451 lines
12 KiB
C
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/*
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* Helpers for HPPA FPU instructions.
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*
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* Copyright (c) 2016 Richard Henderson <rth@twiddle.net>
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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 2.1 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 "qemu/osdep.h"
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#include "cpu.h"
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#include "exec/exec-all.h"
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#include "exec/helper-proto.h"
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#include "fpu/softfloat.h"
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void HELPER(loaded_fr0)(CPUHPPAState *env)
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{
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uint32_t shadow = env->fr[0] >> 32;
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int rm, d;
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env->fr0_shadow = shadow;
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switch (extract32(shadow, 9, 2)) {
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default:
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rm = float_round_nearest_even;
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break;
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case 1:
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rm = float_round_to_zero;
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break;
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case 2:
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rm = float_round_up;
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break;
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case 3:
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rm = float_round_down;
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break;
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}
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set_float_rounding_mode(rm, &env->fp_status);
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d = extract32(shadow, 5, 1);
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set_flush_to_zero(d, &env->fp_status);
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set_flush_inputs_to_zero(d, &env->fp_status);
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}
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void cpu_hppa_loaded_fr0(CPUHPPAState *env)
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{
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helper_loaded_fr0(env);
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}
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#define CONVERT_BIT(X, SRC, DST) \
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((SRC) > (DST) \
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? (X) / ((SRC) / (DST)) & (DST) \
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: ((X) & (SRC)) * ((DST) / (SRC)))
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static void update_fr0_op(CPUHPPAState *env, uintptr_t ra)
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{
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uint32_t soft_exp = get_float_exception_flags(&env->fp_status);
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uint32_t hard_exp = 0;
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uint32_t shadow = env->fr0_shadow;
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if (likely(soft_exp == 0)) {
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env->fr[0] = (uint64_t)shadow << 32;
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return;
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}
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set_float_exception_flags(0, &env->fp_status);
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hard_exp |= CONVERT_BIT(soft_exp, float_flag_inexact, 1u << 0);
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hard_exp |= CONVERT_BIT(soft_exp, float_flag_underflow, 1u << 1);
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hard_exp |= CONVERT_BIT(soft_exp, float_flag_overflow, 1u << 2);
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hard_exp |= CONVERT_BIT(soft_exp, float_flag_divbyzero, 1u << 3);
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hard_exp |= CONVERT_BIT(soft_exp, float_flag_invalid, 1u << 4);
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shadow |= hard_exp << (32 - 5);
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env->fr0_shadow = shadow;
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env->fr[0] = (uint64_t)shadow << 32;
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if (hard_exp & shadow) {
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hppa_dynamic_excp(env, EXCP_ASSIST, ra);
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}
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}
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float32 HELPER(fsqrt_s)(CPUHPPAState *env, float32 arg)
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{
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float32 ret = float32_sqrt(arg, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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float32 HELPER(frnd_s)(CPUHPPAState *env, float32 arg)
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{
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float32 ret = float32_round_to_int(arg, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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float32 HELPER(fadd_s)(CPUHPPAState *env, float32 a, float32 b)
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{
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float32 ret = float32_add(a, b, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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float32 HELPER(fsub_s)(CPUHPPAState *env, float32 a, float32 b)
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{
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float32 ret = float32_sub(a, b, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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float32 HELPER(fmpy_s)(CPUHPPAState *env, float32 a, float32 b)
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{
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float32 ret = float32_mul(a, b, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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float32 HELPER(fdiv_s)(CPUHPPAState *env, float32 a, float32 b)
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{
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float32 ret = float32_div(a, b, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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float64 HELPER(fsqrt_d)(CPUHPPAState *env, float64 arg)
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{
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float64 ret = float64_sqrt(arg, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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float64 HELPER(frnd_d)(CPUHPPAState *env, float64 arg)
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{
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float64 ret = float64_round_to_int(arg, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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float64 HELPER(fadd_d)(CPUHPPAState *env, float64 a, float64 b)
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{
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float64 ret = float64_add(a, b, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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float64 HELPER(fsub_d)(CPUHPPAState *env, float64 a, float64 b)
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{
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float64 ret = float64_sub(a, b, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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float64 HELPER(fmpy_d)(CPUHPPAState *env, float64 a, float64 b)
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{
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float64 ret = float64_mul(a, b, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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float64 HELPER(fdiv_d)(CPUHPPAState *env, float64 a, float64 b)
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{
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float64 ret = float64_div(a, b, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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float64 HELPER(fcnv_s_d)(CPUHPPAState *env, float32 arg)
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{
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float64 ret = float32_to_float64(arg, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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float32 HELPER(fcnv_d_s)(CPUHPPAState *env, float64 arg)
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{
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float32 ret = float64_to_float32(arg, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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float32 HELPER(fcnv_w_s)(CPUHPPAState *env, int32_t arg)
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{
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float32 ret = int32_to_float32(arg, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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float32 HELPER(fcnv_dw_s)(CPUHPPAState *env, int64_t arg)
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{
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float32 ret = int64_to_float32(arg, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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float64 HELPER(fcnv_w_d)(CPUHPPAState *env, int32_t arg)
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{
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float64 ret = int32_to_float64(arg, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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float64 HELPER(fcnv_dw_d)(CPUHPPAState *env, int64_t arg)
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{
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float64 ret = int64_to_float64(arg, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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int32_t HELPER(fcnv_s_w)(CPUHPPAState *env, float32 arg)
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{
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int32_t ret = float32_to_int32(arg, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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int32_t HELPER(fcnv_d_w)(CPUHPPAState *env, float64 arg)
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{
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int32_t ret = float64_to_int32(arg, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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int64_t HELPER(fcnv_s_dw)(CPUHPPAState *env, float32 arg)
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{
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int64_t ret = float32_to_int64(arg, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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int64_t HELPER(fcnv_d_dw)(CPUHPPAState *env, float64 arg)
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{
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int64_t ret = float64_to_int64(arg, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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int32_t HELPER(fcnv_t_s_w)(CPUHPPAState *env, float32 arg)
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{
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int32_t ret = float32_to_int32_round_to_zero(arg, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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int32_t HELPER(fcnv_t_d_w)(CPUHPPAState *env, float64 arg)
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{
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int32_t ret = float64_to_int32_round_to_zero(arg, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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int64_t HELPER(fcnv_t_s_dw)(CPUHPPAState *env, float32 arg)
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{
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int64_t ret = float32_to_int64_round_to_zero(arg, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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int64_t HELPER(fcnv_t_d_dw)(CPUHPPAState *env, float64 arg)
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{
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int64_t ret = float64_to_int64_round_to_zero(arg, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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float32 HELPER(fcnv_uw_s)(CPUHPPAState *env, uint32_t arg)
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{
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float32 ret = uint32_to_float32(arg, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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float32 HELPER(fcnv_udw_s)(CPUHPPAState *env, uint64_t arg)
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{
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float32 ret = uint64_to_float32(arg, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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float64 HELPER(fcnv_uw_d)(CPUHPPAState *env, uint32_t arg)
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{
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float64 ret = uint32_to_float64(arg, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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float64 HELPER(fcnv_udw_d)(CPUHPPAState *env, uint64_t arg)
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{
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float64 ret = uint64_to_float64(arg, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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uint32_t HELPER(fcnv_s_uw)(CPUHPPAState *env, float32 arg)
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{
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uint32_t ret = float32_to_uint32(arg, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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uint32_t HELPER(fcnv_d_uw)(CPUHPPAState *env, float64 arg)
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{
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uint32_t ret = float64_to_uint32(arg, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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uint64_t HELPER(fcnv_s_udw)(CPUHPPAState *env, float32 arg)
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{
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uint64_t ret = float32_to_uint64(arg, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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uint64_t HELPER(fcnv_d_udw)(CPUHPPAState *env, float64 arg)
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{
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uint64_t ret = float64_to_uint64(arg, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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uint32_t HELPER(fcnv_t_s_uw)(CPUHPPAState *env, float32 arg)
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{
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uint32_t ret = float32_to_uint32_round_to_zero(arg, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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uint32_t HELPER(fcnv_t_d_uw)(CPUHPPAState *env, float64 arg)
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{
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uint32_t ret = float64_to_uint32_round_to_zero(arg, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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uint64_t HELPER(fcnv_t_s_udw)(CPUHPPAState *env, float32 arg)
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{
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uint64_t ret = float32_to_uint64_round_to_zero(arg, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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uint64_t HELPER(fcnv_t_d_udw)(CPUHPPAState *env, float64 arg)
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{
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uint64_t ret = float64_to_uint64_round_to_zero(arg, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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static void update_fr0_cmp(CPUHPPAState *env, uint32_t y,
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uint32_t c, FloatRelation r)
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{
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uint32_t shadow = env->fr0_shadow;
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switch (r) {
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case float_relation_greater:
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c = extract32(c, 4, 1);
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break;
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case float_relation_less:
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c = extract32(c, 3, 1);
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break;
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case float_relation_equal:
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c = extract32(c, 2, 1);
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break;
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case float_relation_unordered:
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c = extract32(c, 1, 1);
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break;
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default:
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g_assert_not_reached();
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}
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if (y) {
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/* targeted comparison */
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/* set fpsr[ca[y - 1]] to current compare */
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shadow = deposit32(shadow, 21 - (y - 1), 1, c);
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} else {
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/* queued comparison */
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/* shift cq right by one place */
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shadow = deposit32(shadow, 11, 10, extract32(shadow, 12, 10));
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/* move fpsr[c] to fpsr[cq[0]] */
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shadow = deposit32(shadow, 21, 1, extract32(shadow, 26, 1));
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/* set fpsr[c] to current compare */
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shadow = deposit32(shadow, 26, 1, c);
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}
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env->fr0_shadow = shadow;
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env->fr[0] = (uint64_t)shadow << 32;
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}
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|
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|
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|
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void HELPER(fcmp_s)(CPUHPPAState *env, float32 a, float32 b,
|
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|
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uint32_t y, uint32_t c)
|
||
|
|
{
|
||
|
|
FloatRelation r;
|
||
|
|
if (c & 1) {
|
||
|
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r = float32_compare(a, b, &env->fp_status);
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|
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} else {
|
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|
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r = float32_compare_quiet(a, b, &env->fp_status);
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|
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}
|
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|
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update_fr0_op(env, GETPC());
|
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|
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update_fr0_cmp(env, y, c, r);
|
||
|
|
}
|
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|
|
|
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|
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void HELPER(fcmp_d)(CPUHPPAState *env, float64 a, float64 b,
|
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|
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uint32_t y, uint32_t c)
|
||
|
|
{
|
||
|
|
FloatRelation r;
|
||
|
|
if (c & 1) {
|
||
|
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r = float64_compare(a, b, &env->fp_status);
|
||
|
|
} else {
|
||
|
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r = float64_compare_quiet(a, b, &env->fp_status);
|
||
|
|
}
|
||
|
|
update_fr0_op(env, GETPC());
|
||
|
|
update_fr0_cmp(env, y, c, r);
|
||
|
|
}
|
||
|
|
|
||
|
|
float32 HELPER(fmpyfadd_s)(CPUHPPAState *env, float32 a, float32 b, float32 c)
|
||
|
|
{
|
||
|
|
float32 ret = float32_muladd(a, b, c, 0, &env->fp_status);
|
||
|
|
update_fr0_op(env, GETPC());
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
float32 HELPER(fmpynfadd_s)(CPUHPPAState *env, float32 a, float32 b, float32 c)
|
||
|
|
{
|
||
|
|
float32 ret = float32_muladd(a, b, c, float_muladd_negate_product,
|
||
|
|
&env->fp_status);
|
||
|
|
update_fr0_op(env, GETPC());
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
float64 HELPER(fmpyfadd_d)(CPUHPPAState *env, float64 a, float64 b, float64 c)
|
||
|
|
{
|
||
|
|
float64 ret = float64_muladd(a, b, c, 0, &env->fp_status);
|
||
|
|
update_fr0_op(env, GETPC());
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
float64 HELPER(fmpynfadd_d)(CPUHPPAState *env, float64 a, float64 b, float64 c)
|
||
|
|
{
|
||
|
|
float64 ret = float64_muladd(a, b, c, float_muladd_negate_product,
|
||
|
|
&env->fp_status);
|
||
|
|
update_fr0_op(env, GETPC());
|
||
|
|
return ret;
|
||
|
|
}
|