/*
* Helpers for HPPA instructions.
*
* Copyright (c) 2016 Richard Henderson <rth@twiddle.net>
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "cpu.h"
#include "exec/exec-all.h"
#include "exec/helper-proto.h"
#include "exec/cpu_ldst.h"
void QEMU_NORETURN HELPER(excp)(CPUHPPAState *env, int excp)
{
HPPACPU *cpu = hppa_env_get_cpu(env);
CPUState *cs = CPU(cpu);
cs->exception_index = excp;
cpu_loop_exit(cs);
}
static void QEMU_NORETURN dynexcp(CPUHPPAState *env, int excp, uintptr_t ra)
{
HPPACPU *cpu = hppa_env_get_cpu(env);
CPUState *cs = CPU(cpu);
cs->exception_index = excp;
cpu_loop_exit_restore(cs, ra);
}
void HELPER(tsv)(CPUHPPAState *env, target_ulong cond)
{
if (unlikely((target_long)cond < 0)) {
dynexcp(env, EXCP_SIGFPE, GETPC());
}
}
void HELPER(tcond)(CPUHPPAState *env, target_ulong cond)
{
if (unlikely(cond)) {
dynexcp(env, EXCP_SIGFPE, GETPC());
}
}
static void atomic_store_3(CPUHPPAState *env, target_ulong addr, uint32_t val,
uint32_t mask, uintptr_t ra)
{
uint32_t old, new, cmp;
#ifdef CONFIG_USER_ONLY
uint32_t *haddr = g2h(addr - 1);
old = *haddr;
while (1) {
new = (old & ~mask) | (val & mask);
cmp = atomic_cmpxchg(haddr, old, new);
if (cmp == old) {
return;
}
old = cmp;
}
#else
#error "Not implemented."
#endif
}
void HELPER(stby_b)(CPUHPPAState *env, target_ulong addr, target_ulong val)
{
uintptr_t ra = GETPC();
switch (addr & 3) {
case 3:
cpu_stb_data_ra(env, addr, val, ra);
break;
case 2:
cpu_stw_data_ra(env, addr, val, ra);
break;
case 1:
/* The 3 byte store must appear atomic. */
if (parallel_cpus) {
atomic_store_3(env, addr, val, 0x00ffffffu, ra);
} else {
cpu_stb_data_ra(env, addr, val >> 16, ra);
cpu_stw_data_ra(env, addr + 1, val, ra);
}
break;
default:
cpu_stl_data_ra(env, addr, val, ra);
break;
}
}
void HELPER(stby_e)(CPUHPPAState *env, target_ulong addr, target_ulong val)
{
uintptr_t ra = GETPC();
switch (addr & 3) {
case 3:
/* The 3 byte store must appear atomic. */
if (parallel_cpus) {
atomic_store_3(env, addr - 3, val, 0xffffff00u, ra);
} else {
cpu_stw_data_ra(env, addr - 3, val >> 16, ra);
cpu_stb_data_ra(env, addr - 1, val >> 8, ra);
}
break;
case 2:
cpu_stw_data_ra(env, addr - 2, val >> 16, ra);
break;
case 1:
cpu_stb_data_ra(env, addr - 1, val >> 24, ra);
break;
default:
/* Nothing is stored, but protection is checked and the
cacheline is marked dirty. */
#ifndef CONFIG_USER_ONLY
probe_write(env, addr, cpu_mmu_index(env, 0), ra);
#endif
break;
}
}
target_ulong HELPER(probe_r)(target_ulong addr)
{
return page_check_range(addr, 1, PAGE_READ);
}
target_ulong HELPER(probe_w)(target_ulong addr)
{
return page_check_range(addr, 1, PAGE_WRITE);
}
void HELPER(loaded_fr0)(CPUHPPAState *env)
{
uint32_t shadow = env->fr[0] >> 32;
int rm, d;
env->fr0_shadow = shadow;
switch (extract32(shadow, 9, 2)) {
default:
rm = float_round_nearest_even;
break;
case 1:
rm = float_round_to_zero;
break;
case 2:
rm = float_round_up;
break;
case 3:
rm = float_round_down;
break;
}
set_float_rounding_mode(rm, &env->fp_status);
d = extract32(shadow, 5, 1);
set_flush_to_zero(d, &env->fp_status);
set_flush_inputs_to_zero(d, &env->fp_status);
}
void cpu_hppa_loaded_fr0(CPUHPPAState *env)
{
helper_loaded_fr0(env);
}
#define CONVERT_BIT(X, SRC, DST) \
((SRC) > (DST) \
? (X) / ((SRC) / (DST)) & (DST) \
: ((X) & (SRC)) * ((DST) / (SRC)))
static void update_fr0_op(CPUHPPAState *env, uintptr_t ra)
{
uint32_t soft_exp = get_float_exception_flags(&env->fp_status);
uint32_t hard_exp = 0;
uint32_t shadow = env->fr0_shadow;
if (likely(soft_exp == 0)) {
env->fr[0] = (uint64_t)shadow << 32;
return;
}
set_float_exception_flags(0, &env->fp_status);
hard_exp |= CONVERT_BIT(soft_exp, float_flag_inexact, 1u << 0);
hard_exp |= CONVERT_BIT(soft_exp, float_flag_underflow, 1u << 1);
hard_exp |= CONVERT_BIT(soft_exp, float_flag_overflow, 1u << 2);
hard_exp |= CONVERT_BIT(soft_exp, float_flag_divbyzero, 1u << 3);
hard_exp |= CONVERT_BIT(soft_exp, float_flag_invalid, 1u << 4);
shadow |= hard_exp << (32 - 5);
env->fr0_shadow = shadow;
env->fr[0] = (uint64_t)shadow << 32;
if (hard_exp & shadow) {
dynexcp(env, EXCP_SIGFPE, ra);
}
}
float32 HELPER(fsqrt_s)(CPUHPPAState *env, float32 arg)
{
float32 ret = float32_sqrt(arg, &env->fp_status);
update_fr0_op(env, GETPC());
return ret;
}
float32 HELPER(frnd_s)(CPUHPPAState *env, float32 arg)
{
float32 ret = float32_round_to_int(arg, &env->fp_status);
update_fr0_op(env, GETPC());
return ret;
}
float32 HELPER(fadd_s)(CPUHPPAState *env, float32 a, float32 b)
{
float32 ret = float32_add(a, b, &env->fp_status);
update_fr0_op(env, GETPC());
return ret;
}
float32 HELPER(fsub_s)(CPUHPPAState *env, float32 a, float32 b)
{
float32 ret = float32_sub(a, b, &env->fp_status);
update_fr0_op(env, GETPC());
return ret;
}
float32 HELPER(fmpy_s)(CPUHPPAState *env, float32 a, float32 b)
{
float32 ret = float32_mul(a, b, &env->fp_status);
update_fr0_op(env, GETPC());
return ret;
}
float32 HELPER(fdiv_s)(CPUHPPAState *env, float32 a, float32 b)
{
float32 ret = float32_div(a, b, &env->fp_status);
update_fr0_op(env, GETPC());
return ret;
}
float64 HELPER(fsqrt_d)(CPUHPPAState *env, float64 arg)
{
float64 ret = float64_sqrt(arg, &env->fp_status);
update_fr0_op(env, GETPC());
return ret;
}
float64 HELPER(frnd_d)(CPUHPPAState *env, float64 arg)
{
float64 ret = float64_round_to_int(arg, &env->fp_status);
update_fr0_op(env, GETPC());
return ret;
}
float64 HELPER(fadd_d)(CPUHPPAState *env, float64 a, float64 b)
{
float64 ret = float64_add(a, b, &env->fp_status);
update_fr0_op(env, GETPC());
return ret;
}
float64 HELPER(fsub_d)(CPUHPPAState *env, float64 a, float64 b)
{
float64 ret = float64_sub(a, b, &env->fp_status);
update_fr0_op(env, GETPC());
return ret;
}
float64 HELPER(fmpy_d)(CPUHPPAState *env, float64 a, float64 b)
{
float64 ret = float64_mul(a, b, &env->fp_status);
update_fr0_op(env, GETPC());
return ret;
}
float64 HELPER(fdiv_d)(CPUHPPAState *env, float64 a, float64 b)
{
float64 ret = float64_div(a, b, &env->fp_status);
update_fr0_op(env, GETPC());
return ret;
}
float64 HELPER(fcnv_s_d)(CPUHPPAState *env, float32 arg)
{
float64 ret = float32_to_float64(arg, &env->fp_status);
ret = float64_maybe_silence_nan(ret, &env->fp_status);
update_fr0_op(env, GETPC());
return ret;
}
float32 HELPER(fcnv_d_s)(CPUHPPAState *env, float64 arg)
{
float32 ret = float64_to_float32(arg, &env->fp_status);
ret = float32_maybe_silence_nan(ret, &env->fp_status);
update_fr0_op(env, GETPC());
return ret;
}
float32 HELPER(fcnv_w_s)(CPUHPPAState *env, int32_t arg)
{
float32 ret = int32_to_float32(arg, &env->fp_status);
update_fr0_op(env, GETPC());
return ret;
}
float32 HELPER(fcnv_dw_s)(CPUHPPAState *env, int64_t arg)
{
float32 ret = int64_to_float32(arg, &env->fp_status);
update_fr0_op(env, GETPC());
return ret;
}
float64 HELPER(fcnv_w_d)(CPUHPPAState *env, int32_t arg)
{
float64 ret = int32_to_float64(arg, &env->fp_status);
update_fr0_op(env, GETPC());
return ret;
}
float64 HELPER(fcnv_dw_d)(CPUHPPAState *env, int64_t arg)
{
float64 ret = int64_to_float64(arg, &env->fp_status);
update_fr0_op(env, GETPC());
return ret;
}
int32_t HELPER(fcnv_s_w)(CPUHPPAState *env, float32 arg)
{
int32_t ret = float32_to_int32(arg, &env->fp_status);
update_fr0_op(env, GETPC());
return ret;
}
int32_t HELPER(fcnv_d_w)(CPUHPPAState *env, float64 arg)
{
int32_t ret = float64_to_int32(arg, &env->fp_status);
update_fr0_op(env, GETPC());
return ret;
}
int64_t HELPER(fcnv_s_dw)(CPUHPPAState *env, float32 arg)
{
int64_t ret = float32_to_int64(arg, &env->fp_status);
update_fr0_op(env, GETPC());
return ret;
}
int64_t HELPER(fcnv_d_dw)(CPUHPPAState *env, float64 arg)
{
int64_t ret = float64_to_int64(arg, &env->fp_status);
update_fr0_op(env, GETPC());
return ret;
}
int32_t HELPER(fcnv_t_s_w)(CPUHPPAState *env, float32 arg)
{
int32_t ret = float32_to_int32_round_to_zero(arg, &env->fp_status);
update_fr0_op(env, GETPC());
return ret;
}
int32_t HELPER(fcnv_t_d_w)(CPUHPPAState *env, float64 arg)
{
int32_t ret = float64_to_int32_round_to_zero(arg, &env->fp_status);
update_fr0_op(env, GETPC());
return ret;
}
int64_t HELPER(fcnv_t_s_dw)(CPUHPPAState *env, float32 arg)
{
int64_t ret = float32_to_int64_round_to_zero(arg, &env->fp_status);
update_fr0_op(env, GETPC());
return ret;
}
int64_t HELPER(fcnv_t_d_dw)(CPUHPPAState *env, float64 arg)
{
int64_t ret = float64_to_int64_round_to_zero(arg, &env->fp_status);
update_fr0_op(env, GETPC());
return ret;
}
float32 HELPER(fcnv_uw_s)(CPUHPPAState *env, uint32_t arg)
{
float32 ret = uint32_to_float32(arg, &env->fp_status);
update_fr0_op(env, GETPC());
return ret;
}
float32 HELPER(fcnv_udw_s)(CPUHPPAState *env, uint64_t arg)
{
float32 ret = uint64_to_float32(arg, &env->fp_status);
update_fr0_op(env, GETPC());
return ret;
}
float64 HELPER(fcnv_uw_d)(CPUHPPAState *env, uint32_t arg)
{
float64 ret = uint32_to_float64(arg, &env->fp_status);
update_fr0_op(env, GETPC());
return ret;
}
float64 HELPER(fcnv_udw_d)(CPUHPPAState *env, uint64_t arg)
{
float64 ret = uint64_to_float64(arg, &env->fp_status);
update_fr0_op(env, GETPC());
return ret;
}
uint32_t HELPER(fcnv_s_uw)(CPUHPPAState *env, float32 arg)
{
uint32_t ret = float32_to_uint32(arg, &env->fp_status);
update_fr0_op(env, GETPC());
return ret;
}
uint32_t HELPER(fcnv_d_uw)(CPUHPPAState *env, float64 arg)
{
uint32_t ret = float64_to_uint32(arg, &env->fp_status);
update_fr0_op(env, GETPC());
return ret;
}
uint64_t HELPER(fcnv_s_udw)(CPUHPPAState *env, float32 arg)
{
uint64_t ret = float32_to_uint64(arg, &env->fp_status);
update_fr0_op(env, GETPC());
return ret;
}
uint64_t HELPER(fcnv_d_udw)(CPUHPPAState *env, float64 arg)
{
uint64_t ret = float64_to_uint64(arg, &env->fp_status);
update_fr0_op(env, GETPC());
return ret;
}
uint32_t HELPER(fcnv_t_s_uw)(CPUHPPAState *env, float32 arg)
{
uint32_t ret = float32_to_uint32_round_to_zero(arg, &env->fp_status);
update_fr0_op(env, GETPC());
return ret;
}
uint32_t HELPER(fcnv_t_d_uw)(CPUHPPAState *env, float64 arg)
{
uint32_t ret = float64_to_uint32_round_to_zero(arg, &env->fp_status);
update_fr0_op(env, GETPC());
return ret;
}
uint64_t HELPER(fcnv_t_s_udw)(CPUHPPAState *env, float32 arg)
{
uint64_t ret = float32_to_uint64_round_to_zero(arg, &env->fp_status);
update_fr0_op(env, GETPC());
return ret;
}
uint64_t HELPER(fcnv_t_d_udw)(CPUHPPAState *env, float64 arg)
{
uint64_t ret = float64_to_uint64_round_to_zero(arg, &env->fp_status);
update_fr0_op(env, GETPC());
return ret;
}
static void update_fr0_cmp(CPUHPPAState *env, uint32_t y, uint32_t c, int r)
{
uint32_t shadow = env->fr0_shadow;
switch (r) {
case float_relation_greater:
c = extract32(c, 4, 1);
break;
case float_relation_less:
c = extract32(c, 3, 1);
break;
case float_relation_equal:
c = extract32(c, 2, 1);
break;
case float_relation_unordered:
c = extract32(c, 1, 1);
break;
default:
g_assert_not_reached();
}
if (y) {
/* targeted comparison */
/* set fpsr[ca[y - 1]] to current compare */
shadow = deposit32(shadow, 21 - (y - 1), 1, c);
} else {
/* queued comparison */
/* shift cq right by one place */
shadow = deposit32(shadow, 11, 10, extract32(shadow, 12, 10));
/* move fpsr[c] to fpsr[cq[0]] */
shadow = deposit32(shadow, 21, 1, extract32(shadow, 26, 1));
/* set fpsr[c] to current compare */
shadow = deposit32(shadow, 26, 1, c);
}
env->fr0_shadow = shadow;
env->fr[0] = (uint64_t)shadow << 32;
}
void HELPER(fcmp_s)(CPUHPPAState *env, float32 a, float32 b,
uint32_t y, uint32_t c)
{
int r;
if (c & 1) {
r = float32_compare(a, b, &env->fp_status);
} else {
r = float32_compare_quiet(a, b, &env->fp_status);
}
update_fr0_op(env, GETPC());
update_fr0_cmp(env, y, c, r);
}
void HELPER(fcmp_d)(CPUHPPAState *env, float64 a, float64 b,
uint32_t y, uint32_t c)
{
int r;
if (c & 1) {
r = float64_compare(a, b, &env->fp_status);
} else {
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;
}
