mirrors/qemu
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
e50e6a2019
qemu/target-ppc/op_helper.c
bellard 4ecc31906d fpu fixes (Jocelyn Mayer) - soft float support 
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1335 c046a42c-6fe2-441c-8c8c-71466251a162
2005-03-13 17:01:22 +00:00

571 lines
12 KiB
C
Raw Blame History

/*
* PPC emulation helpers for qemu.
*
* Copyright (c) 2003 Jocelyn Mayer
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <math.h>
#include "exec.h"
#define MEMSUFFIX _raw
#include "op_helper_mem.h"
#if !defined(CONFIG_USER_ONLY)
#define MEMSUFFIX _user
#include "op_helper_mem.h"
#define MEMSUFFIX _kernel
#include "op_helper_mem.h"
#endif
/*****************************************************************************/
/* Exceptions processing helpers */
void cpu_loop_exit(void)
{
longjmp(env->jmp_env, 1);
}
void do_raise_exception_err (uint32_t exception, int error_code)
{
#if 0
printf("Raise exception %3x code : %d\n", exception, error_code);
#endif
switch (exception) {
case EXCP_EXTERNAL:
case EXCP_DECR:
printf("DECREMENTER & EXTERNAL exceptions should be hard interrupts !\n");
if (msr_ee == 0)
return;
break;
case EXCP_PROGRAM:
if (error_code == EXCP_FP && msr_fe0 == 0 && msr_fe1 == 0)
return;
break;
default:
break;
}
env->exception_index = exception;
env->error_code = error_code;
cpu_loop_exit();
}
void do_raise_exception (uint32_t exception)
{
do_raise_exception_err(exception, 0);
}
/*****************************************************************************/
/* Helpers for "fat" micro operations */
/* Special registers load and store */
void do_load_cr (void)
{
T0 = (env->crf[0] << 28) |
(env->crf[1] << 24) |
(env->crf[2] << 20) |
(env->crf[3] << 16) |
(env->crf[4] << 12) |
(env->crf[5] << 8) |
(env->crf[6] << 4) |
(env->crf[7] << 0);
}
void do_store_cr (uint32_t mask)
{
int i, sh;
for (i = 0, sh = 7; i < 8; i++, sh --) {
if (mask & (1 << sh))
env->crf[i] = (T0 >> (sh * 4)) & 0xF;
}
}
void do_load_xer (void)
{
T0 = (xer_so << XER_SO) |
(xer_ov << XER_OV) |
(xer_ca << XER_CA) |
(xer_bc << XER_BC);
}
void do_store_xer (void)
{
xer_so = (T0 >> XER_SO) & 0x01;
xer_ov = (T0 >> XER_OV) & 0x01;
xer_ca = (T0 >> XER_CA) & 0x01;
xer_bc = (T0 >> XER_BC) & 0x1f;
}
void do_load_msr (void)
{
T0 = (msr_pow << MSR_POW) |
(msr_ile << MSR_ILE) |
(msr_ee << MSR_EE) |
(msr_pr << MSR_PR) |
(msr_fp << MSR_FP) |
(msr_me << MSR_ME) |
(msr_fe0 << MSR_FE0) |
(msr_se << MSR_SE) |
(msr_be << MSR_BE) |
(msr_fe1 << MSR_FE1) |
(msr_ip << MSR_IP) |
(msr_ir << MSR_IR) |
(msr_dr << MSR_DR) |
(msr_ri << MSR_RI) |
(msr_le << MSR_LE);
}
void do_store_msr (void)
{
#if 1 // TRY
if (((T0 >> MSR_IR) & 0x01) != msr_ir ||
((T0 >> MSR_DR) & 0x01) != msr_dr ||
((T0 >> MSR_PR) & 0x01) != msr_pr)
{
do_tlbia();
}
#endif
msr_pow = (T0 >> MSR_POW) & 0x03;
msr_ile = (T0 >> MSR_ILE) & 0x01;
msr_ee = (T0 >> MSR_EE) & 0x01;
msr_pr = (T0 >> MSR_PR) & 0x01;
msr_fp = (T0 >> MSR_FP) & 0x01;
msr_me = (T0 >> MSR_ME) & 0x01;
msr_fe0 = (T0 >> MSR_FE0) & 0x01;
msr_se = (T0 >> MSR_SE) & 0x01;
msr_be = (T0 >> MSR_BE) & 0x01;
msr_fe1 = (T0 >> MSR_FE1) & 0x01;
msr_ip = (T0 >> MSR_IP) & 0x01;
msr_ir = (T0 >> MSR_IR) & 0x01;
msr_dr = (T0 >> MSR_DR) & 0x01;
msr_ri = (T0 >> MSR_RI) & 0x01;
msr_le = (T0 >> MSR_LE) & 0x01;
}
/* shift right arithmetic helper */
void do_sraw (void)
{
int32_t ret;
xer_ca = 0;
if (T1 & 0x20) {
ret = (-1) * (T0 >> 31);
if (ret < 0 && (T0 & ~0x80000000) != 0)
xer_ca = 1;
#if 1 // TRY
} else if (T1 == 0) {
ret = T0;
#endif
} else {
ret = (int32_t)T0 >> (T1 & 0x1f);
if (ret < 0 && ((int32_t)T0 & ((1 << T1) - 1)) != 0)
xer_ca = 1;
}
T0 = ret;
}
/* Floating point operations helpers */
void do_load_fpscr (void)
{
/* The 32 MSB of the target fpr are undefined.
* They'll be zero...
*/
union {
double d;
struct {
uint32_t u[2];
} s;
} u;
int i;
#ifdef WORDS_BIGENDIAN
#define WORD0 0
#define WORD1 1
#else
#define WORD0 1
#define WORD1 0
#endif
u.s.u[WORD0] = 0;
u.s.u[WORD1] = 0;
for (i = 0; i < 8; i++)
u.s.u[WORD1] |= env->fpscr[i] << (4 * i);
FT0 = u.d;
}
void do_store_fpscr (uint32_t mask)
{
/*
* We use only the 32 LSB of the incoming fpr
*/
union {
double d;
struct {
uint32_t u[2];
} s;
} u;
int i, rnd_type;
u.d = FT0;
if (mask & 0x80)
env->fpscr[0] = (env->fpscr[0] & 0x9) | ((u.s.u[WORD1] >> 28) & ~0x9);
for (i = 1; i < 7; i++) {
if (mask & (1 << (7 - i)))
env->fpscr[i] = (u.s.u[WORD1] >> (4 * (7 - i))) & 0xF;
}
/* TODO: update FEX & VX */
/* Set rounding mode */
switch (env->fpscr[0] & 0x3) {
case 0:
/* Best approximation (round to nearest) */
rnd_type = float_round_nearest_even;
break;
case 1:
/* Smaller magnitude (round toward zero) */
rnd_type = float_round_to_zero;
break;
case 2:
/* Round toward +infinite */
rnd_type = float_round_up;
break;
default:
case 3:
/* Round toward -infinite */
rnd_type = float_round_down;
break;
}
set_float_rounding_mode(rnd_type, &env->fp_status);
}
void do_fctiw (void)
{
union {
double d;
uint64_t i;
} p;
/* XXX: higher bits are not supposed to be significant.
* to make tests easier, return the same as a real PPC 750 (aka G3)
*/
p.i = float64_to_int32(FT0, &env->fp_status);
p.i |= 0xFFF80000ULL << 32;
FT0 = p.d;
}
void do_fctiwz (void)
{
union {
double d;
uint64_t i;
} p;
/* XXX: higher bits are not supposed to be significant.
* to make tests easier, return the same as a real PPC 750 (aka G3)
*/
p.i = float64_to_int32_round_to_zero(FT0, &env->fp_status);
p.i |= 0xFFF80000ULL << 32;
FT0 = p.d;
}
void do_fnmadd (void)
{
FT0 = (FT0 * FT1) + FT2;
if (!isnan(FT0))
FT0 = -FT0;
}
void do_fnmsub (void)
{
FT0 = (FT0 * FT1) - FT2;
if (!isnan(FT0))
FT0 = -FT0;
}
void do_fdiv (void)
{
if (FT0 == -0.0 && FT1 == -0.0)
FT0 = 0.0 / 0.0;
else
FT0 /= FT1;
}
void do_fsqrt (void)
{
FT0 = sqrt(FT0);
}
void do_fres (void)
{
union {
double d;
uint64_t i;
} p;
if (isnormal(FT0)) {
FT0 = (float)(1.0 / FT0);
} else {
p.d = FT0;
if (p.i == 0x8000000000000000ULL) {
p.i = 0xFFF0000000000000ULL;
} else if (p.i == 0x0000000000000000ULL) {
p.i = 0x7FF0000000000000ULL;
} else if (isnan(FT0)) {
p.i = 0x7FF8000000000000ULL;
} else if (FT0 < 0.0) {
p.i = 0x8000000000000000ULL;
} else {
p.i = 0x0000000000000000ULL;
}
FT0 = p.d;
}
}
void do_frsqrte (void)
{
union {
double d;
uint64_t i;
} p;
if (isnormal(FT0) && FT0 > 0.0) {
FT0 = (float)(1.0 / sqrt(FT0));
} else {
p.d = FT0;
if (p.i == 0x8000000000000000ULL) {
p.i = 0xFFF0000000000000ULL;
} else if (p.i == 0x0000000000000000ULL) {
p.i = 0x7FF0000000000000ULL;
} else if (isnan(FT0)) {
if (!(p.i & 0x0008000000000000ULL))
p.i |= 0x000FFFFFFFFFFFFFULL;
} else if (FT0 < 0) {
p.i = 0x7FF8000000000000ULL;
} else {
p.i = 0x0000000000000000ULL;
}
FT0 = p.d;
}
}
void do_fsel (void)
{
if (FT0 >= 0)
FT0 = FT1;
else
FT0 = FT2;
}
void do_fcmpu (void)
{
if (isnan(FT0) || isnan(FT1)) {
T0 = 0x01;
env->fpscr[4] |= 0x1;
env->fpscr[6] |= 0x1;
} else if (FT0 < FT1) {
T0 = 0x08;
} else if (FT0 > FT1) {
T0 = 0x04;
} else {
T0 = 0x02;
}
env->fpscr[3] = T0;
}
void do_fcmpo (void)
{
env->fpscr[4] &= ~0x1;
if (isnan(FT0) || isnan(FT1)) {
T0 = 0x01;
env->fpscr[4] |= 0x1;
/* I don't know how to test "quiet" nan... */
if (0 /* || ! quiet_nan(...) */) {
env->fpscr[6] |= 0x1;
if (!(env->fpscr[1] & 0x8))
env->fpscr[4] |= 0x8;
} else {
env->fpscr[4] |= 0x8;
}
} else if (FT0 < FT1) {
T0 = 0x08;
} else if (FT0 > FT1) {
T0 = 0x04;
} else {
T0 = 0x02;
}
env->fpscr[3] = T0;
}
void do_fabs (void)
{
union {
double d;
uint64_t i;
} p;
p.d = FT0;
p.i &= ~0x8000000000000000ULL;
FT0 = p.d;
}
void do_fnabs (void)
{
union {
double d;
uint64_t i;
} p;
p.d = FT0;
p.i |= 0x8000000000000000ULL;
FT0 = p.d;
}
/* Instruction cache invalidation helper */
#define ICACHE_LINE_SIZE 32
void do_check_reservation (void)
{
if ((env->reserve & ~0x03) == T0)
env->reserve = -1;
}
void do_icbi (void)
{
/* Invalidate one cache line */
T0 &= ~(ICACHE_LINE_SIZE - 1);
tb_invalidate_page_range(T0, T0 + ICACHE_LINE_SIZE);
}
/* TLB invalidation helpers */
void do_tlbia (void)
{
tlb_flush(env, 1);
}
void do_tlbie (void)
{
tlb_flush_page(env, T0);
}
void do_store_sr (uint32_t srnum)
{
#if defined (DEBUG_OP)
dump_store_sr(srnum);
#endif
#if 0 // TRY
{
uint32_t base, page;
base = srnum << 28;
for (page = base; page != base + 0x100000000; page += 0x1000)
tlb_flush_page(env, page);
}
#else
tlb_flush(env, 1);
#endif
env->sr[srnum] = T0;
}
/* For BATs, we may not invalidate any TLBs if the change is only on
* protection bits for user mode.
*/
void do_store_ibat (int ul, int nr)
{
#if defined (DEBUG_OP)
dump_store_ibat(ul, nr);
#endif
#if 0 // TRY
{
uint32_t base, length, page;
base = env->IBAT[0][nr];
length = (((base >> 2) & 0x000007FF) + 1) << 17;
base &= 0xFFFC0000;
for (page = base; page != base + length; page += 0x1000)
tlb_flush_page(env, page);
}
#else
tlb_flush(env, 1);
#endif
env->IBAT[ul][nr] = T0;
}
void do_store_dbat (int ul, int nr)
{
#if defined (DEBUG_OP)
dump_store_dbat(ul, nr);
#endif
#if 0 // TRY
{
uint32_t base, length, page;
base = env->DBAT[0][nr];
length = (((base >> 2) & 0x000007FF) + 1) << 17;
base &= 0xFFFC0000;
for (page = base; page != base + length; page += 0x1000)
tlb_flush_page(env, page);
}
#else
tlb_flush(env, 1);
#endif
env->DBAT[ul][nr] = T0;
}
/*****************************************************************************/
/* Special helpers for debug */
void dump_state (void)
{
// cpu_dump_state(env, stdout, fprintf, 0);
}
void dump_rfi (void)
{
#if 0
printf("Return from interrupt => 0x%08x\n", env->nip);
// cpu_dump_state(env, stdout, fprintf, 0);
#endif
}
void dump_store_sr (int srnum)
{
#if 0
printf("%s: reg=%d 0x%08x\n", __func__, srnum, T0);
#endif
}
static void _dump_store_bat (char ID, int ul, int nr)
{
printf("Set %cBAT%d%c to 0x%08x (0x%08x)\n",
ID, nr, ul == 0 ? 'u' : 'l', T0, env->nip);
}
void dump_store_ibat (int ul, int nr)
{
_dump_store_bat('I', ul, nr);
}
void dump_store_dbat (int ul, int nr)
{
_dump_store_bat('D', ul, nr);
}
void dump_store_tb (int ul)
{
printf("Set TB%c to 0x%08x\n", ul == 0 ? 'L' : 'U', T0);
}
void dump_update_tb(uint32_t param)
{
#if 0
printf("Update TB: 0x%08x + %d => 0x%08x\n", T1, param, T0);
#endif
}
Reference in New Issue View Git Blame Copy Permalink