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qemu/target-arm/neon_helper.c
Juha Riihimäki 50f67e95e2 target-arm: fix neon shift helper functions 
Current code is broken at least on recent compilers, comparison
between signed and unsigned types yield incorrect code and render
the neon shift helper functions defunct. This is the third revision
of this patch, casting all comparisons with the sizeof operator to
signed ssize_t type to force comparisons to be between signed integral
types.

Signed-off-by: Juha Riihimäki <juha.riihimaki@nokia.com>
Acked-by: Laurent Desnogues <laurent.desnogues@gmail.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2009-10-27 09:46:26 +01:00

1460 lines
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/*
* ARM NEON vector operations.
*
* Copyright (c) 2007, 2008 CodeSourcery.
* Written by Paul Brook
*
* This code is licenced under the GNU GPL v2.
*/
#include <stdlib.h>
#include <stdio.h>
#include "cpu.h"
#include "exec-all.h"
#include "helpers.h"
#define SIGNBIT (uint32_t)0x80000000
#define SIGNBIT64 ((uint64_t)1 << 63)
#define SET_QC() env->vfp.xregs[ARM_VFP_FPSCR] = CPSR_Q
static float_status neon_float_status;
#define NFS &neon_float_status
/* Helper routines to perform bitwise copies between float and int. */
static inline float32 vfp_itos(uint32_t i)
{
union {
uint32_t i;
float32 s;
} v;
v.i = i;
return v.s;
}
static inline uint32_t vfp_stoi(float32 s)
{
union {
uint32_t i;
float32 s;
} v;
v.s = s;
return v.i;
}
#define NEON_TYPE1(name, type) \
typedef struct \
{ \
type v1; \
} neon_##name;
#ifdef HOST_WORDS_BIGENDIAN
#define NEON_TYPE2(name, type) \
typedef struct \
{ \
type v2; \
type v1; \
} neon_##name;
#define NEON_TYPE4(name, type) \
typedef struct \
{ \
type v4; \
type v3; \
type v2; \
type v1; \
} neon_##name;
#else
#define NEON_TYPE2(name, type) \
typedef struct \
{ \
type v1; \
type v2; \
} neon_##name;
#define NEON_TYPE4(name, type) \
typedef struct \
{ \
type v1; \
type v2; \
type v3; \
type v4; \
} neon_##name;
#endif
NEON_TYPE4(s8, int8_t)
NEON_TYPE4(u8, uint8_t)
NEON_TYPE2(s16, int16_t)
NEON_TYPE2(u16, uint16_t)
NEON_TYPE1(s32, int32_t)
NEON_TYPE1(u32, uint32_t)
#undef NEON_TYPE4
#undef NEON_TYPE2
#undef NEON_TYPE1
/* Copy from a uint32_t to a vector structure type. */
#define NEON_UNPACK(vtype, dest, val) do { \
union { \
vtype v; \
uint32_t i; \
} conv_u; \
conv_u.i = (val); \
dest = conv_u.v; \
} while(0)
/* Copy from a vector structure type to a uint32_t. */
#define NEON_PACK(vtype, dest, val) do { \
union { \
vtype v; \
uint32_t i; \
} conv_u; \
conv_u.v = (val); \
dest = conv_u.i; \
} while(0)
#define NEON_DO1 \
NEON_FN(vdest.v1, vsrc1.v1, vsrc2.v1);
#define NEON_DO2 \
NEON_FN(vdest.v1, vsrc1.v1, vsrc2.v1); \
NEON_FN(vdest.v2, vsrc1.v2, vsrc2.v2);
#define NEON_DO4 \
NEON_FN(vdest.v1, vsrc1.v1, vsrc2.v1); \
NEON_FN(vdest.v2, vsrc1.v2, vsrc2.v2); \
NEON_FN(vdest.v3, vsrc1.v3, vsrc2.v3); \
NEON_FN(vdest.v4, vsrc1.v4, vsrc2.v4);
#define NEON_VOP_BODY(vtype, n) \
{ \
uint32_t res; \
vtype vsrc1; \
vtype vsrc2; \
vtype vdest; \
NEON_UNPACK(vtype, vsrc1, arg1); \
NEON_UNPACK(vtype, vsrc2, arg2); \
NEON_DO##n; \
NEON_PACK(vtype, res, vdest); \
return res; \
}
#define NEON_VOP(name, vtype, n) \
uint32_t HELPER(glue(neon_,name))(uint32_t arg1, uint32_t arg2) \
NEON_VOP_BODY(vtype, n)
#define NEON_VOP_ENV(name, vtype, n) \
uint32_t HELPER(glue(neon_,name))(CPUState *env, uint32_t arg1, uint32_t arg2) \
NEON_VOP_BODY(vtype, n)
/* Pairwise operations. */
/* For 32-bit elements each segment only contains a single element, so
the elementwise and pairwise operations are the same. */
#define NEON_PDO2 \
NEON_FN(vdest.v1, vsrc1.v1, vsrc1.v2); \
NEON_FN(vdest.v2, vsrc2.v1, vsrc2.v2);
#define NEON_PDO4 \
NEON_FN(vdest.v1, vsrc1.v1, vsrc1.v2); \
NEON_FN(vdest.v2, vsrc1.v3, vsrc1.v4); \
NEON_FN(vdest.v3, vsrc2.v1, vsrc2.v2); \
NEON_FN(vdest.v4, vsrc2.v3, vsrc2.v4); \
#define NEON_POP(name, vtype, n) \
uint32_t HELPER(glue(neon_,name))(uint32_t arg1, uint32_t arg2) \
{ \
uint32_t res; \
vtype vsrc1; \
vtype vsrc2; \
vtype vdest; \
NEON_UNPACK(vtype, vsrc1, arg1); \
NEON_UNPACK(vtype, vsrc2, arg2); \
NEON_PDO##n; \
NEON_PACK(vtype, res, vdest); \
return res; \
}
/* Unary operators. */
#define NEON_VOP1(name, vtype, n) \
uint32_t HELPER(glue(neon_,name))(uint32_t arg) \
{ \
vtype vsrc1; \
vtype vdest; \
NEON_UNPACK(vtype, vsrc1, arg); \
NEON_DO##n; \
NEON_PACK(vtype, arg, vdest); \
return arg; \
}
#define NEON_USAT(dest, src1, src2, type) do { \
uint32_t tmp = (uint32_t)src1 + (uint32_t)src2; \
if (tmp != (type)tmp) { \
SET_QC(); \
dest = ~0; \
} else { \
dest = tmp; \
}} while(0)
#define NEON_FN(dest, src1, src2) NEON_USAT(dest, src1, src2, uint8_t)
NEON_VOP_ENV(qadd_u8, neon_u8, 4)
#undef NEON_FN
#define NEON_FN(dest, src1, src2) NEON_USAT(dest, src1, src2, uint16_t)
NEON_VOP_ENV(qadd_u16, neon_u16, 2)
#undef NEON_FN
#undef NEON_USAT
#define NEON_SSAT(dest, src1, src2, type) do { \
int32_t tmp = (uint32_t)src1 + (uint32_t)src2; \
if (tmp != (type)tmp) { \
SET_QC(); \
if (src2 > 0) { \
tmp = (1 << (sizeof(type) * 8 - 1)) - 1; \
} else { \
tmp = 1 << (sizeof(type) * 8 - 1); \
} \
} \
dest = tmp; \
} while(0)
#define NEON_FN(dest, src1, src2) NEON_SSAT(dest, src1, src2, int8_t)
NEON_VOP_ENV(qadd_s8, neon_s8, 4)
#undef NEON_FN
#define NEON_FN(dest, src1, src2) NEON_SSAT(dest, src1, src2, int16_t)
NEON_VOP_ENV(qadd_s16, neon_s16, 2)
#undef NEON_FN
#undef NEON_SSAT
#define NEON_USAT(dest, src1, src2, type) do { \
uint32_t tmp = (uint32_t)src1 - (uint32_t)src2; \
if (tmp != (type)tmp) { \
SET_QC(); \
dest = 0; \
} else { \
dest = tmp; \
}} while(0)
#define NEON_FN(dest, src1, src2) NEON_USAT(dest, src1, src2, uint8_t)
NEON_VOP_ENV(qsub_u8, neon_u8, 4)
#undef NEON_FN
#define NEON_FN(dest, src1, src2) NEON_USAT(dest, src1, src2, uint16_t)
NEON_VOP_ENV(qsub_u16, neon_u16, 2)
#undef NEON_FN
#undef NEON_USAT
#define NEON_SSAT(dest, src1, src2, type) do { \
int32_t tmp = (uint32_t)src1 - (uint32_t)src2; \
if (tmp != (type)tmp) { \
SET_QC(); \
if (src2 < 0) { \
tmp = (1 << (sizeof(type) * 8 - 1)) - 1; \
} else { \
tmp = 1 << (sizeof(type) * 8 - 1); \
} \
} \
dest = tmp; \
} while(0)
#define NEON_FN(dest, src1, src2) NEON_SSAT(dest, src1, src2, int8_t)
NEON_VOP_ENV(qsub_s8, neon_s8, 4)
#undef NEON_FN
#define NEON_FN(dest, src1, src2) NEON_SSAT(dest, src1, src2, int16_t)
NEON_VOP_ENV(qsub_s16, neon_s16, 2)
#undef NEON_FN
#undef NEON_SSAT
#define NEON_FN(dest, src1, src2) dest = (src1 + src2) >> 1
NEON_VOP(hadd_s8, neon_s8, 4)
NEON_VOP(hadd_u8, neon_u8, 4)
NEON_VOP(hadd_s16, neon_s16, 2)
NEON_VOP(hadd_u16, neon_u16, 2)
#undef NEON_FN
int32_t HELPER(neon_hadd_s32)(int32_t src1, int32_t src2)
{
int32_t dest;
dest = (src1 >> 1) + (src2 >> 1);
if (src1 & src2 & 1)
dest++;
return dest;
}
uint32_t HELPER(neon_hadd_u32)(uint32_t src1, uint32_t src2)
{
uint32_t dest;
dest = (src1 >> 1) + (src2 >> 1);
if (src1 & src2 & 1)
dest++;
return dest;
}
#define NEON_FN(dest, src1, src2) dest = (src1 + src2 + 1) >> 1
NEON_VOP(rhadd_s8, neon_s8, 4)
NEON_VOP(rhadd_u8, neon_u8, 4)
NEON_VOP(rhadd_s16, neon_s16, 2)
NEON_VOP(rhadd_u16, neon_u16, 2)
#undef NEON_FN
int32_t HELPER(neon_rhadd_s32)(int32_t src1, int32_t src2)
{
int32_t dest;
dest = (src1 >> 1) + (src2 >> 1);
if ((src1 | src2) & 1)
dest++;
return dest;
}
uint32_t HELPER(neon_rhadd_u32)(uint32_t src1, uint32_t src2)
{
uint32_t dest;
dest = (src1 >> 1) + (src2 >> 1);
if ((src1 | src2) & 1)
dest++;
return dest;
}
#define NEON_FN(dest, src1, src2) dest = (src1 - src2) >> 1
NEON_VOP(hsub_s8, neon_s8, 4)
NEON_VOP(hsub_u8, neon_u8, 4)
NEON_VOP(hsub_s16, neon_s16, 2)
NEON_VOP(hsub_u16, neon_u16, 2)
#undef NEON_FN
int32_t HELPER(neon_hsub_s32)(int32_t src1, int32_t src2)
{
int32_t dest;
dest = (src1 >> 1) - (src2 >> 1);
if ((~src1) & src2 & 1)
dest--;
return dest;
}
uint32_t HELPER(neon_hsub_u32)(uint32_t src1, uint32_t src2)
{
uint32_t dest;
dest = (src1 >> 1) - (src2 >> 1);
if ((~src1) & src2 & 1)
dest--;
return dest;
}
#define NEON_FN(dest, src1, src2) dest = (src1 > src2) ? ~0 : 0
NEON_VOP(cgt_s8, neon_s8, 4)
NEON_VOP(cgt_u8, neon_u8, 4)
NEON_VOP(cgt_s16, neon_s16, 2)
NEON_VOP(cgt_u16, neon_u16, 2)
NEON_VOP(cgt_s32, neon_s32, 1)
NEON_VOP(cgt_u32, neon_u32, 1)
#undef NEON_FN
#define NEON_FN(dest, src1, src2) dest = (src1 >= src2) ? ~0 : 0
NEON_VOP(cge_s8, neon_s8, 4)
NEON_VOP(cge_u8, neon_u8, 4)
NEON_VOP(cge_s16, neon_s16, 2)
NEON_VOP(cge_u16, neon_u16, 2)
NEON_VOP(cge_s32, neon_s32, 1)
NEON_VOP(cge_u32, neon_u32, 1)
#undef NEON_FN
#define NEON_FN(dest, src1, src2) dest = (src1 < src2) ? src1 : src2
NEON_VOP(min_s8, neon_s8, 4)
NEON_VOP(min_u8, neon_u8, 4)
NEON_VOP(min_s16, neon_s16, 2)
NEON_VOP(min_u16, neon_u16, 2)
NEON_VOP(min_s32, neon_s32, 1)
NEON_VOP(min_u32, neon_u32, 1)
NEON_POP(pmin_s8, neon_s8, 4)
NEON_POP(pmin_u8, neon_u8, 4)
NEON_POP(pmin_s16, neon_s16, 2)
NEON_POP(pmin_u16, neon_u16, 2)
#undef NEON_FN
#define NEON_FN(dest, src1, src2) dest = (src1 > src2) ? src1 : src2
NEON_VOP(max_s8, neon_s8, 4)
NEON_VOP(max_u8, neon_u8, 4)
NEON_VOP(max_s16, neon_s16, 2)
NEON_VOP(max_u16, neon_u16, 2)
NEON_VOP(max_s32, neon_s32, 1)
NEON_VOP(max_u32, neon_u32, 1)
NEON_POP(pmax_s8, neon_s8, 4)
NEON_POP(pmax_u8, neon_u8, 4)
NEON_POP(pmax_s16, neon_s16, 2)
NEON_POP(pmax_u16, neon_u16, 2)
#undef NEON_FN
#define NEON_FN(dest, src1, src2) \
dest = (src1 > src2) ? (src1 - src2) : (src2 - src1)
NEON_VOP(abd_s8, neon_s8, 4)
NEON_VOP(abd_u8, neon_u8, 4)
NEON_VOP(abd_s16, neon_s16, 2)
NEON_VOP(abd_u16, neon_u16, 2)
NEON_VOP(abd_s32, neon_s32, 1)
NEON_VOP(abd_u32, neon_u32, 1)
#undef NEON_FN
#define NEON_FN(dest, src1, src2) do { \
int8_t tmp; \
tmp = (int8_t)src2; \
if (tmp >= (ssize_t)sizeof(src1) * 8 || \
tmp <= -(ssize_t)sizeof(src1) * 8) { \
dest = 0; \
} else if (tmp < 0) { \
dest = src1 >> -tmp; \
} else { \
dest = src1 << tmp; \
}} while (0)
NEON_VOP(shl_u8, neon_u8, 4)
NEON_VOP(shl_u16, neon_u16, 2)
NEON_VOP(shl_u32, neon_u32, 1)
#undef NEON_FN
uint64_t HELPER(neon_shl_u64)(uint64_t val, uint64_t shiftop)
{
int8_t shift = (int8_t)shiftop;
if (shift >= 64 || shift <= -64) {
val = 0;
} else if (shift < 0) {
val >>= -shift;
} else {
val <<= shift;
}
return val;
}
#define NEON_FN(dest, src1, src2) do { \
int8_t tmp; \
tmp = (int8_t)src2; \
if (tmp >= (ssize_t)sizeof(src1) * 8) { \
dest = 0; \
} else if (tmp <= -(ssize_t)sizeof(src1) * 8) { \
dest = src1 >> (sizeof(src1) * 8 - 1); \
} else if (tmp < 0) { \
dest = src1 >> -tmp; \
} else { \
dest = src1 << tmp; \
}} while (0)
NEON_VOP(shl_s8, neon_s8, 4)
NEON_VOP(shl_s16, neon_s16, 2)
NEON_VOP(shl_s32, neon_s32, 1)
#undef NEON_FN
uint64_t HELPER(neon_shl_s64)(uint64_t valop, uint64_t shiftop)
{
int8_t shift = (int8_t)shiftop;
int64_t val = valop;
if (shift >= 64) {
val = 0;
} else if (shift <= -64) {
val >>= 63;
} else if (shift < 0) {
val >>= -shift;
} else {
val <<= shift;
}
return val;
}
#define NEON_FN(dest, src1, src2) do { \
int8_t tmp; \
tmp = (int8_t)src2; \
if (tmp >= (ssize_t)sizeof(src1) * 8) { \
dest = 0; \
} else if (tmp < -(ssize_t)sizeof(src1) * 8) { \
dest = src1 >> (sizeof(src1) * 8 - 1); \
} else if (tmp == -(ssize_t)sizeof(src1) * 8) { \
dest = src1 >> (tmp - 1); \
dest++; \
dest >>= 1; \
} else if (tmp < 0) { \
dest = (src1 + (1 << (-1 - tmp))) >> -tmp; \
} else { \
dest = src1 << tmp; \
}} while (0)
NEON_VOP(rshl_s8, neon_s8, 4)
NEON_VOP(rshl_s16, neon_s16, 2)
NEON_VOP(rshl_s32, neon_s32, 1)
#undef NEON_FN
uint64_t HELPER(neon_rshl_s64)(uint64_t valop, uint64_t shiftop)
{
int8_t shift = (int8_t)shiftop;
int64_t val = valop;
if (shift >= 64) {
val = 0;
} else if (shift < -64) {
val >>= 63;
} else if (shift == -63) {
val >>= 63;
val++;
val >>= 1;
} else if (shift < 0) {
val = (val + ((int64_t)1 << (-1 - shift))) >> -shift;
} else {
val <<= shift;
}
return val;
}
#define NEON_FN(dest, src1, src2) do { \
int8_t tmp; \
tmp = (int8_t)src2; \
if (tmp >= (ssize_t)sizeof(src1) * 8 || \
tmp < -(ssize_t)sizeof(src1) * 8) { \
dest = 0; \
} else if (tmp == -(ssize_t)sizeof(src1) * 8) { \
dest = src1 >> (tmp - 1); \
} else if (tmp < 0) { \
dest = (src1 + (1 << (-1 - tmp))) >> -tmp; \
} else { \
dest = src1 << tmp; \
}} while (0)
NEON_VOP(rshl_u8, neon_u8, 4)
NEON_VOP(rshl_u16, neon_u16, 2)
NEON_VOP(rshl_u32, neon_u32, 1)
#undef NEON_FN
uint64_t HELPER(neon_rshl_u64)(uint64_t val, uint64_t shiftop)
{
int8_t shift = (uint8_t)shiftop;
if (shift >= 64 || shift < 64) {
val = 0;
} else if (shift == -64) {
/* Rounding a 1-bit result just preserves that bit. */
val >>= 63;
} if (shift < 0) {
val = (val + ((uint64_t)1 << (-1 - shift))) >> -shift;
val >>= -shift;
} else {
val <<= shift;
}
return val;
}
#define NEON_FN(dest, src1, src2) do { \
int8_t tmp; \
tmp = (int8_t)src2; \
if (tmp >= (ssize_t)sizeof(src1) * 8) { \
if (src1) { \
SET_QC(); \
dest = ~0; \
} else { \
dest = 0; \
} \
} else if (tmp <= -(ssize_t)sizeof(src1) * 8) { \
dest = 0; \
} else if (tmp < 0) { \
dest = src1 >> -tmp; \
} else { \
dest = src1 << tmp; \
if ((dest >> tmp) != src1) { \
SET_QC(); \
dest = ~0; \
} \
}} while (0)
NEON_VOP_ENV(qshl_u8, neon_u8, 4)
NEON_VOP_ENV(qshl_u16, neon_u16, 2)
NEON_VOP_ENV(qshl_u32, neon_u32, 1)
#undef NEON_FN
uint64_t HELPER(neon_qshl_u64)(CPUState *env, uint64_t val, uint64_t shiftop)
{
int8_t shift = (int8_t)shiftop;
if (shift >= 64) {
if (val) {
val = ~(uint64_t)0;
SET_QC();
} else {
val = 0;
}
} else if (shift <= -64) {
val = 0;
} else if (shift < 0) {
val >>= -shift;
} else {
uint64_t tmp = val;
val <<= shift;
if ((val >> shift) != tmp) {
SET_QC();
val = ~(uint64_t)0;
}
}
return val;
}
#define NEON_FN(dest, src1, src2) do { \
int8_t tmp; \
tmp = (int8_t)src2; \
if (tmp >= (ssize_t)sizeof(src1) * 8) { \
if (src1) \
SET_QC(); \
dest = src1 >> 31; \
} else if (tmp <= -(ssize_t)sizeof(src1) * 8) { \
dest = src1 >> 31; \
} else if (tmp < 0) { \
dest = src1 >> -tmp; \
} else { \
dest = src1 << tmp; \
if ((dest >> tmp) != src1) { \
SET_QC(); \
dest = src2 >> 31; \
} \
}} while (0)
NEON_VOP_ENV(qshl_s8, neon_s8, 4)
NEON_VOP_ENV(qshl_s16, neon_s16, 2)
NEON_VOP_ENV(qshl_s32, neon_s32, 1)
#undef NEON_FN
uint64_t HELPER(neon_qshl_s64)(CPUState *env, uint64_t valop, uint64_t shiftop)
{
int8_t shift = (uint8_t)shiftop;
int64_t val = valop;
if (shift >= 64) {
if (val) {
SET_QC();
val = (val >> 63) & ~SIGNBIT64;
}
} else if (shift <= 64) {
val >>= 63;
} else if (shift < 0) {
val >>= -shift;
} else {
int64_t tmp = val;
val <<= shift;
if ((val >> shift) != tmp) {
SET_QC();
val = (tmp >> 63) ^ ~SIGNBIT64;
}
}
return val;
}
/* FIXME: This is wrong. */
#define NEON_FN(dest, src1, src2) do { \
int8_t tmp; \
tmp = (int8_t)src2; \
if (tmp < 0) { \
dest = (src1 + (1 << (-1 - tmp))) >> -tmp; \
} else { \
dest = src1 << tmp; \
if ((dest >> tmp) != src1) { \
SET_QC(); \
dest = ~0; \
} \
}} while (0)
NEON_VOP_ENV(qrshl_u8, neon_u8, 4)
NEON_VOP_ENV(qrshl_u16, neon_u16, 2)
NEON_VOP_ENV(qrshl_u32, neon_u32, 1)
#undef NEON_FN
uint64_t HELPER(neon_qrshl_u64)(CPUState *env, uint64_t val, uint64_t shiftop)
{
int8_t shift = (int8_t)shiftop;
if (shift < 0) {
val = (val + (1 << (-1 - shift))) >> -shift;
} else { \
uint64_t tmp = val;
val <<= shift;
if ((val >> shift) != tmp) {
SET_QC();
val = ~0;
}
}
return val;
}
#define NEON_FN(dest, src1, src2) do { \
int8_t tmp; \
tmp = (int8_t)src2; \
if (tmp < 0) { \
dest = (src1 + (1 << (-1 - tmp))) >> -tmp; \
} else { \
dest = src1 << tmp; \
if ((dest >> tmp) != src1) { \
SET_QC(); \
dest = src1 >> 31; \
} \
}} while (0)
NEON_VOP_ENV(qrshl_s8, neon_s8, 4)
NEON_VOP_ENV(qrshl_s16, neon_s16, 2)
NEON_VOP_ENV(qrshl_s32, neon_s32, 1)
#undef NEON_FN
uint64_t HELPER(neon_qrshl_s64)(CPUState *env, uint64_t valop, uint64_t shiftop)
{
int8_t shift = (uint8_t)shiftop;
int64_t val = valop;
if (shift < 0) {
val = (val + (1 << (-1 - shift))) >> -shift;
} else {
int64_t tmp = val;;
val <<= shift;
if ((val >> shift) != tmp) {
SET_QC();
val = tmp >> 31;
}
}
return val;
}
uint32_t HELPER(neon_add_u8)(uint32_t a, uint32_t b)
{
uint32_t mask;
mask = (a ^ b) & 0x80808080u;
a &= ~0x80808080u;
b &= ~0x80808080u;
return (a + b) ^ mask;
}
uint32_t HELPER(neon_add_u16)(uint32_t a, uint32_t b)
{
uint32_t mask;
mask = (a ^ b) & 0x80008000u;
a &= ~0x80008000u;
b &= ~0x80008000u;
return (a + b) ^ mask;
}
#define NEON_FN(dest, src1, src2) dest = src1 + src2
NEON_POP(padd_u8, neon_u8, 4)
NEON_POP(padd_u16, neon_u16, 2)
#undef NEON_FN
#define NEON_FN(dest, src1, src2) dest = src1 - src2
NEON_VOP(sub_u8, neon_u8, 4)
NEON_VOP(sub_u16, neon_u16, 2)
#undef NEON_FN
#define NEON_FN(dest, src1, src2) dest = src1 * src2
NEON_VOP(mul_u8, neon_u8, 4)
NEON_VOP(mul_u16, neon_u16, 2)
#undef NEON_FN
/* Polynomial multiplication is like integer multiplication except the
partial products are XORed, not added. */
uint32_t HELPER(neon_mul_p8)(uint32_t op1, uint32_t op2)
{
uint32_t mask;
uint32_t result;
result = 0;
while (op1) {
mask = 0;
if (op1 & 1)
mask |= 0xff;
if (op1 & (1 << 8))
mask |= (0xff << 8);
if (op1 & (1 << 16))
mask |= (0xff << 16);
if (op1 & (1 << 24))
mask |= (0xff << 24);
result ^= op2 & mask;
op1 = (op1 >> 1) & 0x7f7f7f7f;
op2 = (op2 << 1) & 0xfefefefe;
}
return result;
}
#define NEON_FN(dest, src1, src2) dest = (src1 & src2) ? -1 : 0
NEON_VOP(tst_u8, neon_u8, 4)
NEON_VOP(tst_u16, neon_u16, 2)
NEON_VOP(tst_u32, neon_u32, 1)
#undef NEON_FN
#define NEON_FN(dest, src1, src2) dest = (src1 == src2) ? -1 : 0
NEON_VOP(ceq_u8, neon_u8, 4)
NEON_VOP(ceq_u16, neon_u16, 2)
NEON_VOP(ceq_u32, neon_u32, 1)
#undef NEON_FN
#define NEON_FN(dest, src, dummy) dest = (src < 0) ? -src : src
NEON_VOP1(abs_s8, neon_s8, 4)
NEON_VOP1(abs_s16, neon_s16, 2)
#undef NEON_FN
/* Count Leading Sign/Zero Bits. */
static inline int do_clz8(uint8_t x)
{
int n;
for (n = 8; x; n--)
x >>= 1;
return n;
}
static inline int do_clz16(uint16_t x)
{
int n;
for (n = 16; x; n--)
x >>= 1;
return n;
}
#define NEON_FN(dest, src, dummy) dest = do_clz8(src)
NEON_VOP1(clz_u8, neon_u8, 4)
#undef NEON_FN
#define NEON_FN(dest, src, dummy) dest = do_clz16(src)
NEON_VOP1(clz_u16, neon_u16, 2)
#undef NEON_FN
#define NEON_FN(dest, src, dummy) dest = do_clz8((src < 0) ? ~src : src) - 1
NEON_VOP1(cls_s8, neon_s8, 4)
#undef NEON_FN
#define NEON_FN(dest, src, dummy) dest = do_clz16((src < 0) ? ~src : src) - 1
NEON_VOP1(cls_s16, neon_s16, 2)
#undef NEON_FN
uint32_t HELPER(neon_cls_s32)(uint32_t x)
{
int count;
if ((int32_t)x < 0)
x = ~x;
for (count = 32; x; count--)
x = x >> 1;
return count - 1;
}
/* Bit count. */
uint32_t HELPER(neon_cnt_u8)(uint32_t x)
{
x = (x & 0x55555555) + ((x >> 1) & 0x55555555);
x = (x & 0x33333333) + ((x >> 2) & 0x33333333);
x = (x & 0x0f0f0f0f) + ((x >> 4) & 0x0f0f0f0f);
return x;
}
#define NEON_QDMULH16(dest, src1, src2, round) do { \
uint32_t tmp = (int32_t)(int16_t) src1 * (int16_t) src2; \
if ((tmp ^ (tmp << 1)) & SIGNBIT) { \
SET_QC(); \
tmp = (tmp >> 31) ^ ~SIGNBIT; \
} \
tmp <<= 1; \
if (round) { \
int32_t old = tmp; \
tmp += 1 << 15; \
if ((int32_t)tmp < old) { \
SET_QC(); \
tmp = SIGNBIT - 1; \
} \
} \
dest = tmp >> 16; \
} while(0)
#define NEON_FN(dest, src1, src2) NEON_QDMULH16(dest, src1, src2, 0)
NEON_VOP_ENV(qdmulh_s16, neon_s16, 2)
#undef NEON_FN
#define NEON_FN(dest, src1, src2) NEON_QDMULH16(dest, src1, src2, 1)
NEON_VOP_ENV(qrdmulh_s16, neon_s16, 2)
#undef NEON_FN
#undef NEON_QDMULH16
#define NEON_QDMULH32(dest, src1, src2, round) do { \
uint64_t tmp = (int64_t)(int32_t) src1 * (int32_t) src2; \
if ((tmp ^ (tmp << 1)) & SIGNBIT64) { \
SET_QC(); \
tmp = (tmp >> 63) ^ ~SIGNBIT64; \
} else { \
tmp <<= 1; \
} \
if (round) { \
int64_t old = tmp; \
tmp += (int64_t)1 << 31; \
if ((int64_t)tmp < old) { \
SET_QC(); \
tmp = SIGNBIT64 - 1; \
} \
} \
dest = tmp >> 32; \
} while(0)
#define NEON_FN(dest, src1, src2) NEON_QDMULH32(dest, src1, src2, 0)
NEON_VOP_ENV(qdmulh_s32, neon_s32, 1)
#undef NEON_FN
#define NEON_FN(dest, src1, src2) NEON_QDMULH32(dest, src1, src2, 1)
NEON_VOP_ENV(qrdmulh_s32, neon_s32, 1)
#undef NEON_FN
#undef NEON_QDMULH32
uint32_t HELPER(neon_narrow_u8)(uint64_t x)
{
return (x & 0xffu) | ((x >> 8) & 0xff00u) | ((x >> 16) & 0xff0000u)
| ((x >> 24) & 0xff000000u);
}
uint32_t HELPER(neon_narrow_u16)(uint64_t x)
{
return (x & 0xffffu) | ((x >> 16) & 0xffff0000u);
}
uint32_t HELPER(neon_narrow_high_u8)(uint64_t x)
{
return ((x >> 8) & 0xff) | ((x >> 16) & 0xff00)
| ((x >> 24) & 0xff0000) | ((x >> 32) & 0xff000000);
}
uint32_t HELPER(neon_narrow_high_u16)(uint64_t x)
{
return ((x >> 16) & 0xffff) | ((x >> 32) & 0xffff0000);
}
uint32_t HELPER(neon_narrow_round_high_u8)(uint64_t x)
{
x &= 0xff80ff80ff80ff80ull;
x += 0x0080008000800080ull;
return ((x >> 8) & 0xff) | ((x >> 16) & 0xff00)
| ((x >> 24) & 0xff0000) | ((x >> 32) & 0xff000000);
}
uint32_t HELPER(neon_narrow_round_high_u16)(uint64_t x)
{
x &= 0xffff8000ffff8000ull;
x += 0x0000800000008000ull;
return ((x >> 16) & 0xffff) | ((x >> 32) & 0xffff0000);
}
uint32_t HELPER(neon_narrow_sat_u8)(CPUState *env, uint64_t x)
{
uint16_t s;
uint8_t d;
uint32_t res = 0;
#define SAT8(n) \
s = x >> n; \
if (s > 0xff) { \
d = 0xff; \
SET_QC(); \
} else { \
d = s; \
} \
res |= (uint32_t)d << (n / 2);
SAT8(0);
SAT8(16);
SAT8(32);
SAT8(48);
#undef SAT8
return res;
}
uint32_t HELPER(neon_narrow_sat_s8)(CPUState *env, uint64_t x)
{
int16_t s;
uint8_t d;
uint32_t res = 0;
#define SAT8(n) \
s = x >> n; \
if (s != (int8_t)s) { \
d = (s >> 15) ^ 0x7f; \
SET_QC(); \
} else { \
d = s; \
} \
res |= (uint32_t)d << (n / 2);
SAT8(0);
SAT8(16);
SAT8(32);
SAT8(48);
#undef SAT8
return res;
}
uint32_t HELPER(neon_narrow_sat_u16)(CPUState *env, uint64_t x)
{
uint32_t high;
uint32_t low;
low = x;
if (low > 0xffff) {
low = 0xffff;
SET_QC();
}
high = x >> 32;
if (high > 0xffff) {
high = 0xffff;
SET_QC();
}
return low | (high << 16);
}
uint32_t HELPER(neon_narrow_sat_s16)(CPUState *env, uint64_t x)
{
int32_t low;
int32_t high;
low = x;
if (low != (int16_t)low) {
low = (low >> 31) ^ 0x7fff;
SET_QC();
}
high = x >> 32;
if (high != (int16_t)high) {
high = (high >> 31) ^ 0x7fff;
SET_QC();
}
return (uint16_t)low | (high << 16);
}
uint32_t HELPER(neon_narrow_sat_u32)(CPUState *env, uint64_t x)
{
if (x > 0xffffffffu) {
SET_QC();
return 0xffffffffu;
}
return x;
}
uint32_t HELPER(neon_narrow_sat_s32)(CPUState *env, uint64_t x)
{
if ((int64_t)x != (int32_t)x) {
SET_QC();
return (x >> 63) ^ 0x7fffffff;
}
return x;
}
uint64_t HELPER(neon_widen_u8)(uint32_t x)
{
uint64_t tmp;
uint64_t ret;
ret = (uint8_t)x;
tmp = (uint8_t)(x >> 8);
ret |= tmp << 16;
tmp = (uint8_t)(x >> 16);
ret |= tmp << 32;
tmp = (uint8_t)(x >> 24);
ret |= tmp << 48;
return ret;
}
uint64_t HELPER(neon_widen_s8)(uint32_t x)
{
uint64_t tmp;
uint64_t ret;
ret = (uint16_t)(int8_t)x;
tmp = (uint16_t)(int8_t)(x >> 8);
ret |= tmp << 16;
tmp = (uint16_t)(int8_t)(x >> 16);
ret |= tmp << 32;
tmp = (uint16_t)(int8_t)(x >> 24);
ret |= tmp << 48;
return ret;
}
uint64_t HELPER(neon_widen_u16)(uint32_t x)
{
uint64_t high = (uint16_t)(x >> 16);
return ((uint16_t)x) | (high << 32);
}
uint64_t HELPER(neon_widen_s16)(uint32_t x)
{
uint64_t high = (int16_t)(x >> 16);
return ((uint32_t)(int16_t)x) | (high << 32);
}
uint64_t HELPER(neon_addl_u16)(uint64_t a, uint64_t b)
{
uint64_t mask;
mask = (a ^ b) & 0x8000800080008000ull;
a &= ~0x8000800080008000ull;
b &= ~0x8000800080008000ull;
return (a + b) ^ mask;
}
uint64_t HELPER(neon_addl_u32)(uint64_t a, uint64_t b)
{
uint64_t mask;
mask = (a ^ b) & 0x8000000080000000ull;
a &= ~0x8000000080000000ull;
b &= ~0x8000000080000000ull;
return (a + b) ^ mask;
}
uint64_t HELPER(neon_paddl_u16)(uint64_t a, uint64_t b)
{
uint64_t tmp;
uint64_t tmp2;
tmp = a & 0x0000ffff0000ffffull;
tmp += (a >> 16) & 0x0000ffff0000ffffull;
tmp2 = b & 0xffff0000ffff0000ull;
tmp2 += (b << 16) & 0xffff0000ffff0000ull;
return ( tmp & 0xffff)
| ((tmp >> 16) & 0xffff0000ull)
| ((tmp2 << 16) & 0xffff00000000ull)
| ( tmp2 & 0xffff000000000000ull);
}
uint64_t HELPER(neon_paddl_u32)(uint64_t a, uint64_t b)
{
uint32_t low = a + (a >> 32);
uint32_t high = b + (b >> 32);
return low + ((uint64_t)high << 32);
}
uint64_t HELPER(neon_subl_u16)(uint64_t a, uint64_t b)
{
uint64_t mask;
mask = (a ^ ~b) & 0x8000800080008000ull;
a |= 0x8000800080008000ull;
b &= ~0x8000800080008000ull;
return (a - b) ^ mask;
}
uint64_t HELPER(neon_subl_u32)(uint64_t a, uint64_t b)
{
uint64_t mask;
mask = (a ^ ~b) & 0x8000000080000000ull;
a |= 0x8000000080000000ull;
b &= ~0x8000000080000000ull;
return (a - b) ^ mask;
}
uint64_t HELPER(neon_addl_saturate_s32)(CPUState *env, uint64_t a, uint64_t b)
{
uint32_t x, y;
uint32_t low, high;
x = a;
y = b;
low = x + y;
if (((low ^ x) & SIGNBIT) && !((x ^ y) & SIGNBIT)) {
SET_QC();
low = ((int32_t)x >> 31) ^ ~SIGNBIT;
}
x = a >> 32;
y = b >> 32;
high = x + y;
if (((high ^ x) & SIGNBIT) && !((x ^ y) & SIGNBIT)) {
SET_QC();
high = ((int32_t)x >> 31) ^ ~SIGNBIT;
}
return low | ((uint64_t)high << 32);
}
uint64_t HELPER(neon_addl_saturate_s64)(CPUState *env, uint64_t a, uint64_t b)
{
uint64_t result;
result = a + b;
if (((result ^ a) & SIGNBIT64) && !((a ^ b) & SIGNBIT64)) {
SET_QC();
result = ((int64_t)a >> 63) ^ ~SIGNBIT64;
}
return result;
}
#define DO_ABD(dest, x, y, type) do { \
type tmp_x = x; \
type tmp_y = y; \
dest = ((tmp_x > tmp_y) ? tmp_x - tmp_y : tmp_y - tmp_x); \
} while(0)
uint64_t HELPER(neon_abdl_u16)(uint32_t a, uint32_t b)
{
uint64_t tmp;
uint64_t result;
DO_ABD(result, a, b, uint8_t);
DO_ABD(tmp, a >> 8, b >> 8, uint8_t);
result |= tmp << 16;
DO_ABD(tmp, a >> 16, b >> 16, uint8_t);
result |= tmp << 32;
DO_ABD(tmp, a >> 24, b >> 24, uint8_t);
result |= tmp << 48;
return result;
}
uint64_t HELPER(neon_abdl_s16)(uint32_t a, uint32_t b)
{
uint64_t tmp;
uint64_t result;
DO_ABD(result, a, b, int8_t);
DO_ABD(tmp, a >> 8, b >> 8, int8_t);
result |= tmp << 16;
DO_ABD(tmp, a >> 16, b >> 16, int8_t);
result |= tmp << 32;
DO_ABD(tmp, a >> 24, b >> 24, int8_t);
result |= tmp << 48;
return result;
}
uint64_t HELPER(neon_abdl_u32)(uint32_t a, uint32_t b)
{
uint64_t tmp;
uint64_t result;
DO_ABD(result, a, b, uint16_t);
DO_ABD(tmp, a >> 16, b >> 16, uint16_t);
return result | (tmp << 32);
}
uint64_t HELPER(neon_abdl_s32)(uint32_t a, uint32_t b)
{
uint64_t tmp;
uint64_t result;
DO_ABD(result, a, b, int16_t);
DO_ABD(tmp, a >> 16, b >> 16, int16_t);
return result | (tmp << 32);
}
uint64_t HELPER(neon_abdl_u64)(uint32_t a, uint32_t b)
{
uint64_t result;
DO_ABD(result, a, b, uint32_t);
return result;
}
uint64_t HELPER(neon_abdl_s64)(uint32_t a, uint32_t b)
{
uint64_t result;
DO_ABD(result, a, b, int32_t);
return result;
}
#undef DO_ABD
/* Widening multiply. Named type is the source type. */
#define DO_MULL(dest, x, y, type1, type2) do { \
type1 tmp_x = x; \
type1 tmp_y = y; \
dest = (type2)((type2)tmp_x * (type2)tmp_y); \
} while(0)
uint64_t HELPER(neon_mull_u8)(uint32_t a, uint32_t b)
{
uint64_t tmp;
uint64_t result;
DO_MULL(result, a, b, uint8_t, uint16_t);
DO_MULL(tmp, a >> 8, b >> 8, uint8_t, uint16_t);
result |= tmp << 16;
DO_MULL(tmp, a >> 16, b >> 16, uint8_t, uint16_t);
result |= tmp << 32;
DO_MULL(tmp, a >> 24, b >> 24, uint8_t, uint16_t);
result |= tmp << 48;
return result;
}
uint64_t HELPER(neon_mull_s8)(uint32_t a, uint32_t b)
{
uint64_t tmp;
uint64_t result;
DO_MULL(result, a, b, int8_t, uint16_t);
DO_MULL(tmp, a >> 8, b >> 8, int8_t, uint16_t);
result |= tmp << 16;
DO_MULL(tmp, a >> 16, b >> 16, int8_t, uint16_t);
result |= tmp << 32;
DO_MULL(tmp, a >> 24, b >> 24, int8_t, uint16_t);
result |= tmp << 48;
return result;
}
uint64_t HELPER(neon_mull_u16)(uint32_t a, uint32_t b)
{
uint64_t tmp;
uint64_t result;
DO_MULL(result, a, b, uint16_t, uint32_t);
DO_MULL(tmp, a >> 16, b >> 16, uint16_t, uint32_t);
return result | (tmp << 32);
}
uint64_t HELPER(neon_mull_s16)(uint32_t a, uint32_t b)
{
uint64_t tmp;
uint64_t result;
DO_MULL(result, a, b, int16_t, uint32_t);
DO_MULL(tmp, a >> 16, b >> 16, int16_t, uint32_t);
return result | (tmp << 32);
}
uint64_t HELPER(neon_negl_u16)(uint64_t x)
{
uint16_t tmp;
uint64_t result;
result = (uint16_t)-x;
tmp = -(x >> 16);
result |= (uint64_t)tmp << 16;
tmp = -(x >> 32);
result |= (uint64_t)tmp << 32;
tmp = -(x >> 48);
result |= (uint64_t)tmp << 48;
return result;
}
#include <stdio.h>
uint64_t HELPER(neon_negl_u32)(uint64_t x)
{
uint32_t low = -x;
uint32_t high = -(x >> 32);
return low | ((uint64_t)high << 32);
}
/* FIXME: There should be a native op for this. */
uint64_t HELPER(neon_negl_u64)(uint64_t x)
{
return -x;
}
/* Saturnating sign manuipulation. */
/* ??? Make these use NEON_VOP1 */
#define DO_QABS8(x) do { \
if (x == (int8_t)0x80) { \
x = 0x7f; \
SET_QC(); \
} else if (x < 0) { \
x = -x; \
}} while (0)
uint32_t HELPER(neon_qabs_s8)(CPUState *env, uint32_t x)
{
neon_s8 vec;
NEON_UNPACK(neon_s8, vec, x);
DO_QABS8(vec.v1);
DO_QABS8(vec.v2);
DO_QABS8(vec.v3);
DO_QABS8(vec.v4);
NEON_PACK(neon_s8, x, vec);
return x;
}
#undef DO_QABS8
#define DO_QNEG8(x) do { \
if (x == (int8_t)0x80) { \
x = 0x7f; \
SET_QC(); \
} else { \
x = -x; \
}} while (0)
uint32_t HELPER(neon_qneg_s8)(CPUState *env, uint32_t x)
{
neon_s8 vec;
NEON_UNPACK(neon_s8, vec, x);
DO_QNEG8(vec.v1);
DO_QNEG8(vec.v2);
DO_QNEG8(vec.v3);
DO_QNEG8(vec.v4);
NEON_PACK(neon_s8, x, vec);
return x;
}
#undef DO_QNEG8
#define DO_QABS16(x) do { \
if (x == (int16_t)0x8000) { \
x = 0x7fff; \
SET_QC(); \
} else if (x < 0) { \
x = -x; \
}} while (0)
uint32_t HELPER(neon_qabs_s16)(CPUState *env, uint32_t x)
{
neon_s16 vec;
NEON_UNPACK(neon_s16, vec, x);
DO_QABS16(vec.v1);
DO_QABS16(vec.v2);
NEON_PACK(neon_s16, x, vec);
return x;
}
#undef DO_QABS16
#define DO_QNEG16(x) do { \
if (x == (int16_t)0x8000) { \
x = 0x7fff; \
SET_QC(); \
} else { \
x = -x; \
}} while (0)
uint32_t HELPER(neon_qneg_s16)(CPUState *env, uint32_t x)
{
neon_s16 vec;
NEON_UNPACK(neon_s16, vec, x);
DO_QNEG16(vec.v1);
DO_QNEG16(vec.v2);
NEON_PACK(neon_s16, x, vec);
return x;
}
#undef DO_QNEG16
uint32_t HELPER(neon_qabs_s32)(CPUState *env, uint32_t x)
{
if (x == SIGNBIT) {
SET_QC();
x = ~SIGNBIT;
} else if ((int32_t)x < 0) {
x = -x;
}
return x;
}
uint32_t HELPER(neon_qneg_s32)(CPUState *env, uint32_t x)
{
if (x == SIGNBIT) {
SET_QC();
x = ~SIGNBIT;
} else {
x = -x;
}
return x;
}
/* NEON Float helpers. */
uint32_t HELPER(neon_min_f32)(uint32_t a, uint32_t b)
{
float32 f0 = vfp_itos(a);
float32 f1 = vfp_itos(b);
return (float32_compare_quiet(f0, f1, NFS) == -1) ? a : b;
}
uint32_t HELPER(neon_max_f32)(uint32_t a, uint32_t b)
{
float32 f0 = vfp_itos(a);
float32 f1 = vfp_itos(b);
return (float32_compare_quiet(f0, f1, NFS) == 1) ? a : b;
}
uint32_t HELPER(neon_abd_f32)(uint32_t a, uint32_t b)
{
float32 f0 = vfp_itos(a);
float32 f1 = vfp_itos(b);
return vfp_stoi((float32_compare_quiet(f0, f1, NFS) == 1)
? float32_sub(f0, f1, NFS)
: float32_sub(f1, f0, NFS));
}
uint32_t HELPER(neon_add_f32)(uint32_t a, uint32_t b)
{
return vfp_stoi(float32_add(vfp_itos(a), vfp_itos(b), NFS));
}
uint32_t HELPER(neon_sub_f32)(uint32_t a, uint32_t b)
{
return vfp_stoi(float32_sub(vfp_itos(a), vfp_itos(b), NFS));
}
uint32_t HELPER(neon_mul_f32)(uint32_t a, uint32_t b)
{
return vfp_stoi(float32_mul(vfp_itos(a), vfp_itos(b), NFS));
}
/* Floating point comparisons produce an integer result. */
#define NEON_VOP_FCMP(name, cmp) \
uint32_t HELPER(neon_##name)(uint32_t a, uint32_t b) \
{ \
if (float32_compare_quiet(vfp_itos(a), vfp_itos(b), NFS) cmp 0) \
return ~0; \
else \
return 0; \
}
NEON_VOP_FCMP(ceq_f32, ==)
NEON_VOP_FCMP(cge_f32, >=)
NEON_VOP_FCMP(cgt_f32, >)
uint32_t HELPER(neon_acge_f32)(uint32_t a, uint32_t b)
{
float32 f0 = float32_abs(vfp_itos(a));
float32 f1 = float32_abs(vfp_itos(b));
return (float32_compare_quiet(f0, f1,NFS) >= 0) ? ~0 : 0;
}
uint32_t HELPER(neon_acgt_f32)(uint32_t a, uint32_t b)
{
float32 f0 = float32_abs(vfp_itos(a));
float32 f1 = float32_abs(vfp_itos(b));
return (float32_compare_quiet(f0, f1, NFS) > 0) ? ~0 : 0;
}
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