mirrors/qemu
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
957e8b3492
qemu/target/unicore32/ucf64_helper.c
Alex Bennée 24f91e81b6 target/*/cpu.h: remove softfloat.h 
As cpu.h is another typically widely included file which doesn't need
full access to the softfloat API we can remove the includes from here
as well. Where they do need types it's typically for float_status and
the rounding modes so we move that to softfloat-types.h as well.

As a result of not having softfloat in every cpu.h call we now need to
add it to various helpers that do need the full softfloat.h
definitions.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
[For PPC parts]
Acked-by: David Gibson <david@gibson.dropbear.id.au>
2018-02-21 10:20:24 +00:00

327 lines
7.8 KiB
C
Raw Blame History

/*
* UniCore-F64 simulation helpers for QEMU.
*
* Copyright (C) 2010-2012 Guan Xuetao
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation, or any later version.
* See the COPYING file in the top-level directory.
*/
#include "qemu/osdep.h"
#include "cpu.h"
#include "exec/helper-proto.h"
#include "fpu/softfloat.h"
/*
* The convention used for UniCore-F64 instructions:
* Single precition routines have a "s" suffix
* Double precision routines have a "d" suffix.
*/
/* Convert host exception flags to f64 form. */
static inline int ucf64_exceptbits_from_host(int host_bits)
{
int target_bits = 0;
if (host_bits & float_flag_invalid) {
target_bits |= UCF64_FPSCR_FLAG_INVALID;
}
if (host_bits & float_flag_divbyzero) {
target_bits |= UCF64_FPSCR_FLAG_DIVZERO;
}
if (host_bits & float_flag_overflow) {
target_bits |= UCF64_FPSCR_FLAG_OVERFLOW;
}
if (host_bits & float_flag_underflow) {
target_bits |= UCF64_FPSCR_FLAG_UNDERFLOW;
}
if (host_bits & float_flag_inexact) {
target_bits |= UCF64_FPSCR_FLAG_INEXACT;
}
return target_bits;
}
uint32_t HELPER(ucf64_get_fpscr)(CPUUniCore32State *env)
{
int i;
uint32_t fpscr;
fpscr = (env->ucf64.xregs[UC32_UCF64_FPSCR] & UCF64_FPSCR_MASK);
i = get_float_exception_flags(&env->ucf64.fp_status);
fpscr |= ucf64_exceptbits_from_host(i);
return fpscr;
}
/* Convert ucf64 exception flags to target form. */
static inline int ucf64_exceptbits_to_host(int target_bits)
{
int host_bits = 0;
if (target_bits & UCF64_FPSCR_FLAG_INVALID) {
host_bits |= float_flag_invalid;
}
if (target_bits & UCF64_FPSCR_FLAG_DIVZERO) {
host_bits |= float_flag_divbyzero;
}
if (target_bits & UCF64_FPSCR_FLAG_OVERFLOW) {
host_bits |= float_flag_overflow;
}
if (target_bits & UCF64_FPSCR_FLAG_UNDERFLOW) {
host_bits |= float_flag_underflow;
}
if (target_bits & UCF64_FPSCR_FLAG_INEXACT) {
host_bits |= float_flag_inexact;
}
return host_bits;
}
void HELPER(ucf64_set_fpscr)(CPUUniCore32State *env, uint32_t val)
{
UniCore32CPU *cpu = uc32_env_get_cpu(env);
int i;
uint32_t changed;
changed = env->ucf64.xregs[UC32_UCF64_FPSCR];
env->ucf64.xregs[UC32_UCF64_FPSCR] = (val & UCF64_FPSCR_MASK);
changed ^= val;
if (changed & (UCF64_FPSCR_RND_MASK)) {
i = UCF64_FPSCR_RND(val);
switch (i) {
case 0:
i = float_round_nearest_even;
break;
case 1:
i = float_round_to_zero;
break;
case 2:
i = float_round_up;
break;
case 3:
i = float_round_down;
break;
default: /* 100 and 101 not implement */
cpu_abort(CPU(cpu), "Unsupported UniCore-F64 round mode");
}
set_float_rounding_mode(i, &env->ucf64.fp_status);
}
i = ucf64_exceptbits_to_host(UCF64_FPSCR_TRAPEN(val));
set_float_exception_flags(i, &env->ucf64.fp_status);
}
float32 HELPER(ucf64_adds)(float32 a, float32 b, CPUUniCore32State *env)
{
return float32_add(a, b, &env->ucf64.fp_status);
}
float64 HELPER(ucf64_addd)(float64 a, float64 b, CPUUniCore32State *env)
{
return float64_add(a, b, &env->ucf64.fp_status);
}
float32 HELPER(ucf64_subs)(float32 a, float32 b, CPUUniCore32State *env)
{
return float32_sub(a, b, &env->ucf64.fp_status);
}
float64 HELPER(ucf64_subd)(float64 a, float64 b, CPUUniCore32State *env)
{
return float64_sub(a, b, &env->ucf64.fp_status);
}
float32 HELPER(ucf64_muls)(float32 a, float32 b, CPUUniCore32State *env)
{
return float32_mul(a, b, &env->ucf64.fp_status);
}
float64 HELPER(ucf64_muld)(float64 a, float64 b, CPUUniCore32State *env)
{
return float64_mul(a, b, &env->ucf64.fp_status);
}
float32 HELPER(ucf64_divs)(float32 a, float32 b, CPUUniCore32State *env)
{
return float32_div(a, b, &env->ucf64.fp_status);
}
float64 HELPER(ucf64_divd)(float64 a, float64 b, CPUUniCore32State *env)
{
return float64_div(a, b, &env->ucf64.fp_status);
}
float32 HELPER(ucf64_negs)(float32 a)
{
return float32_chs(a);
}
float64 HELPER(ucf64_negd)(float64 a)
{
return float64_chs(a);
}
float32 HELPER(ucf64_abss)(float32 a)
{
return float32_abs(a);
}
float64 HELPER(ucf64_absd)(float64 a)
{
return float64_abs(a);
}
void HELPER(ucf64_cmps)(float32 a, float32 b, uint32_t c,
CPUUniCore32State *env)
{
int flag;
flag = float32_compare_quiet(a, b, &env->ucf64.fp_status);
env->CF = 0;
switch (c & 0x7) {
case 0: /* F */
break;
case 1: /* UN */
if (flag == 2) {
env->CF = 1;
}
break;
case 2: /* EQ */
if (flag == 0) {
env->CF = 1;
}
break;
case 3: /* UEQ */
if ((flag == 0) || (flag == 2)) {
env->CF = 1;
}
break;
case 4: /* OLT */
if (flag == -1) {
env->CF = 1;
}
break;
case 5: /* ULT */
if ((flag == -1) || (flag == 2)) {
env->CF = 1;
}
break;
case 6: /* OLE */
if ((flag == -1) || (flag == 0)) {
env->CF = 1;
}
break;
case 7: /* ULE */
if (flag != 1) {
env->CF = 1;
}
break;
}
env->ucf64.xregs[UC32_UCF64_FPSCR] = (env->CF << 29)
| (env->ucf64.xregs[UC32_UCF64_FPSCR] & 0x0fffffff);
}
void HELPER(ucf64_cmpd)(float64 a, float64 b, uint32_t c,
CPUUniCore32State *env)
{
int flag;
flag = float64_compare_quiet(a, b, &env->ucf64.fp_status);
env->CF = 0;
switch (c & 0x7) {
case 0: /* F */
break;
case 1: /* UN */
if (flag == 2) {
env->CF = 1;
}
break;
case 2: /* EQ */
if (flag == 0) {
env->CF = 1;
}
break;
case 3: /* UEQ */
if ((flag == 0) || (flag == 2)) {
env->CF = 1;
}
break;
case 4: /* OLT */
if (flag == -1) {
env->CF = 1;
}
break;
case 5: /* ULT */
if ((flag == -1) || (flag == 2)) {
env->CF = 1;
}
break;
case 6: /* OLE */
if ((flag == -1) || (flag == 0)) {
env->CF = 1;
}
break;
case 7: /* ULE */
if (flag != 1) {
env->CF = 1;
}
break;
}
env->ucf64.xregs[UC32_UCF64_FPSCR] = (env->CF << 29)
| (env->ucf64.xregs[UC32_UCF64_FPSCR] & 0x0fffffff);
}
/* Helper routines to perform bitwise copies between float and int. */
static inline float32 ucf64_itos(uint32_t i)
{
union {
uint32_t i;
float32 s;
} v;
v.i = i;
return v.s;
}
static inline uint32_t ucf64_stoi(float32 s)
{
union {
uint32_t i;
float32 s;
} v;
v.s = s;
return v.i;
}
/* Integer to float conversion. */
float32 HELPER(ucf64_si2sf)(float32 x, CPUUniCore32State *env)
{
return int32_to_float32(ucf64_stoi(x), &env->ucf64.fp_status);
}
float64 HELPER(ucf64_si2df)(float32 x, CPUUniCore32State *env)
{
return int32_to_float64(ucf64_stoi(x), &env->ucf64.fp_status);
}
/* Float to integer conversion. */
float32 HELPER(ucf64_sf2si)(float32 x, CPUUniCore32State *env)
{
return ucf64_itos(float32_to_int32(x, &env->ucf64.fp_status));
}
float32 HELPER(ucf64_df2si)(float64 x, CPUUniCore32State *env)
{
return ucf64_itos(float64_to_int32(x, &env->ucf64.fp_status));
}
/* floating point conversion */
float64 HELPER(ucf64_sf2df)(float32 x, CPUUniCore32State *env)
{
return float32_to_float64(x, &env->ucf64.fp_status);
}
float32 HELPER(ucf64_df2sf)(float64 x, CPUUniCore32State *env)
{
return float64_to_float32(x, &env->ucf64.fp_status);
}
Reference in New Issue View Git Blame Copy Permalink