3fc6c082e3
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1489 c046a42c-6fe2-441c-8c8c-71466251a162
302 lines
6.4 KiB
C
302 lines
6.4 KiB
C
/*
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* PowerPC emulation helpers for qemu.
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*
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* Copyright (c) 2003-2005 Jocelyn Mayer
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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, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <math.h>
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#include "exec.h"
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#define MEMSUFFIX _raw
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#include "op_helper_mem.h"
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#if !defined(CONFIG_USER_ONLY)
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#define MEMSUFFIX _user
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#include "op_helper_mem.h"
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#define MEMSUFFIX _kernel
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#include "op_helper_mem.h"
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#endif
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/*****************************************************************************/
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/* Exceptions processing helpers */
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void cpu_loop_exit(void)
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{
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longjmp(env->jmp_env, 1);
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}
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void do_raise_exception_err (uint32_t exception, int error_code)
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{
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#if 0
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printf("Raise exception %3x code : %d\n", exception, error_code);
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#endif
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switch (exception) {
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case EXCP_EXTERNAL:
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case EXCP_DECR:
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printf("DECREMENTER & EXTERNAL exceptions should be hard interrupts !\n");
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if (msr_ee == 0)
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return;
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break;
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case EXCP_PROGRAM:
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if (error_code == EXCP_FP && msr_fe0 == 0 && msr_fe1 == 0)
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return;
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break;
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default:
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break;
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}
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env->exception_index = exception;
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env->error_code = error_code;
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cpu_loop_exit();
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}
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void do_raise_exception (uint32_t exception)
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{
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do_raise_exception_err(exception, 0);
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}
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/*****************************************************************************/
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/* Helpers for "fat" micro operations */
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/* shift right arithmetic helper */
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void do_sraw (void)
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{
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int32_t ret;
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xer_ca = 0;
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if (T1 & 0x20) {
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ret = (-1) * (T0 >> 31);
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if (ret < 0 && (T0 & ~0x80000000) != 0)
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xer_ca = 1;
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#if 1 // TRY
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} else if (T1 == 0) {
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ret = T0;
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#endif
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} else {
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ret = (int32_t)T0 >> (T1 & 0x1f);
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if (ret < 0 && ((int32_t)T0 & ((1 << T1) - 1)) != 0)
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xer_ca = 1;
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}
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T0 = ret;
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}
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/* Floating point operations helpers */
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void do_fctiw (void)
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{
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union {
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double d;
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uint64_t i;
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} p;
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/* XXX: higher bits are not supposed to be significant.
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* to make tests easier, return the same as a real PowerPC 750 (aka G3)
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*/
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p.i = float64_to_int32(FT0, &env->fp_status);
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p.i |= 0xFFF80000ULL << 32;
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FT0 = p.d;
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}
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void do_fctiwz (void)
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{
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union {
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double d;
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uint64_t i;
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} p;
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/* XXX: higher bits are not supposed to be significant.
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* to make tests easier, return the same as a real PowerPC 750 (aka G3)
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*/
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p.i = float64_to_int32_round_to_zero(FT0, &env->fp_status);
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p.i |= 0xFFF80000ULL << 32;
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FT0 = p.d;
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}
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void do_fnmadd (void)
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{
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FT0 = (FT0 * FT1) + FT2;
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if (!isnan(FT0))
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FT0 = -FT0;
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}
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void do_fnmsub (void)
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{
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FT0 = (FT0 * FT1) - FT2;
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if (!isnan(FT0))
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FT0 = -FT0;
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}
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void do_fdiv (void)
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{
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if (FT0 == -0.0 && FT1 == -0.0)
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FT0 = 0.0 / 0.0;
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else
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FT0 /= FT1;
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}
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void do_fsqrt (void)
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{
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FT0 = sqrt(FT0);
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}
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void do_fres (void)
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{
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union {
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double d;
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uint64_t i;
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} p;
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if (isnormal(FT0)) {
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FT0 = (float)(1.0 / FT0);
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} else {
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p.d = FT0;
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if (p.i == 0x8000000000000000ULL) {
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p.i = 0xFFF0000000000000ULL;
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} else if (p.i == 0x0000000000000000ULL) {
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p.i = 0x7FF0000000000000ULL;
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} else if (isnan(FT0)) {
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p.i = 0x7FF8000000000000ULL;
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} else if (FT0 < 0.0) {
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p.i = 0x8000000000000000ULL;
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} else {
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p.i = 0x0000000000000000ULL;
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}
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FT0 = p.d;
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}
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}
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void do_frsqrte (void)
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{
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union {
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double d;
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uint64_t i;
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} p;
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if (isnormal(FT0) && FT0 > 0.0) {
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FT0 = (float)(1.0 / sqrt(FT0));
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} else {
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p.d = FT0;
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if (p.i == 0x8000000000000000ULL) {
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p.i = 0xFFF0000000000000ULL;
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} else if (p.i == 0x0000000000000000ULL) {
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p.i = 0x7FF0000000000000ULL;
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} else if (isnan(FT0)) {
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if (!(p.i & 0x0008000000000000ULL))
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p.i |= 0x000FFFFFFFFFFFFFULL;
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} else if (FT0 < 0) {
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p.i = 0x7FF8000000000000ULL;
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} else {
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p.i = 0x0000000000000000ULL;
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}
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FT0 = p.d;
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}
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}
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void do_fsel (void)
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{
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if (FT0 >= 0)
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FT0 = FT1;
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else
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FT0 = FT2;
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}
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void do_fcmpu (void)
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{
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if (isnan(FT0) || isnan(FT1)) {
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T0 = 0x01;
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env->fpscr[4] |= 0x1;
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env->fpscr[6] |= 0x1;
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} else if (FT0 < FT1) {
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T0 = 0x08;
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} else if (FT0 > FT1) {
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T0 = 0x04;
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} else {
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T0 = 0x02;
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}
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env->fpscr[3] = T0;
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}
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void do_fcmpo (void)
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{
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env->fpscr[4] &= ~0x1;
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if (isnan(FT0) || isnan(FT1)) {
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T0 = 0x01;
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env->fpscr[4] |= 0x1;
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/* I don't know how to test "quiet" nan... */
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if (0 /* || ! quiet_nan(...) */) {
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env->fpscr[6] |= 0x1;
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if (!(env->fpscr[1] & 0x8))
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env->fpscr[4] |= 0x8;
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} else {
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env->fpscr[4] |= 0x8;
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}
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} else if (FT0 < FT1) {
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T0 = 0x08;
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} else if (FT0 > FT1) {
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T0 = 0x04;
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} else {
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T0 = 0x02;
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}
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env->fpscr[3] = T0;
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}
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void do_fabs (void)
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{
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union {
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double d;
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uint64_t i;
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} p;
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p.d = FT0;
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p.i &= ~0x8000000000000000ULL;
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FT0 = p.d;
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}
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void do_fnabs (void)
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{
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union {
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double d;
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uint64_t i;
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} p;
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p.d = FT0;
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p.i |= 0x8000000000000000ULL;
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FT0 = p.d;
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}
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/* Instruction cache invalidation helper */
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#define ICACHE_LINE_SIZE 32
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void do_check_reservation (void)
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{
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if ((env->reserve & ~0x03) == T0)
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env->reserve = -1;
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}
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void do_icbi (void)
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{
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/* Invalidate one cache line */
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T0 &= ~(ICACHE_LINE_SIZE - 1);
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tb_invalidate_page_range(T0, T0 + ICACHE_LINE_SIZE);
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}
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/* TLB invalidation helpers */
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void do_tlbia (void)
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{
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tlb_flush(env, 1);
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}
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void do_tlbie (void)
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{
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tlb_flush_page(env, T0);
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}
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