system/qemu
system/qemu
1
0
Fork 0
mirror of https://gitlab.com/qemu-project/qemu synced 2024-11-05 20:35:44 +00:00
Code Issues Projects Releases Packages Wiki Activity

accel/tcg: Use add/sub overflow routines in tcg-runtime-gvec.c

Browse source 
Obvious uses of the new functions.

Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2020-11-06 18:51:27 -08:00
parent 1ec8070e58
commit 7702a85519
1 changed files with 16 additions and 20 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

36
accel/tcg/tcg-runtime-gvec.c
View file

@ -1073,9 +1073,8 @@ void HELPER(gvec_ssadd32)(void *d, void *a, void *b, uint32_t desc)
for (i = 0; i < oprsz; i += sizeof(int32_t)) {
int32_t ai = *(int32_t *)(a + i);
int32_t bi = *(int32_t *)(b + i);
int32_t di = ai + bi;
if (((di ^ ai) &~ (ai ^ bi)) < 0) {
/* Signed overflow. */
int32_t di;
if (sadd32_overflow(ai, bi, &di)) {
di = (di < 0 ? INT32_MAX : INT32_MIN);
}
*(int32_t *)(d + i) = di;
@ -1091,9 +1090,8 @@ void HELPER(gvec_ssadd64)(void *d, void *a, void *b, uint32_t desc)
for (i = 0; i < oprsz; i += sizeof(int64_t)) {
int64_t ai = *(int64_t *)(a + i);
int64_t bi = *(int64_t *)(b + i);
int64_t di = ai + bi;
if (((di ^ ai) &~ (ai ^ bi)) < 0) {
/* Signed overflow. */
int64_t di;
if (sadd64_overflow(ai, bi, &di)) {
di = (di < 0 ? INT64_MAX : INT64_MIN);
}
*(int64_t *)(d + i) = di;
@ -1143,9 +1141,8 @@ void HELPER(gvec_sssub32)(void *d, void *a, void *b, uint32_t desc)
for (i = 0; i < oprsz; i += sizeof(int32_t)) {
int32_t ai = *(int32_t *)(a + i);
int32_t bi = *(int32_t *)(b + i);
int32_t di = ai - bi;
if (((di ^ ai) & (ai ^ bi)) < 0) {
/* Signed overflow. */
int32_t di;
if (ssub32_overflow(ai, bi, &di)) {
di = (di < 0 ? INT32_MAX : INT32_MIN);
}
*(int32_t *)(d + i) = di;
@ -1161,9 +1158,8 @@ void HELPER(gvec_sssub64)(void *d, void *a, void *b, uint32_t desc)
for (i = 0; i < oprsz; i += sizeof(int64_t)) {
int64_t ai = *(int64_t *)(a + i);
int64_t bi = *(int64_t *)(b + i);
int64_t di = ai - bi;
if (((di ^ ai) & (ai ^ bi)) < 0) {
/* Signed overflow. */
int64_t di;
if (ssub64_overflow(ai, bi, &di)) {
di = (di < 0 ? INT64_MAX : INT64_MIN);
}
*(int64_t *)(d + i) = di;
@ -1209,8 +1205,8 @@ void HELPER(gvec_usadd32)(void *d, void *a, void *b, uint32_t desc)
for (i = 0; i < oprsz; i += sizeof(uint32_t)) {
uint32_t ai = *(uint32_t *)(a + i);
uint32_t bi = *(uint32_t *)(b + i);
uint32_t di = ai + bi;
if (di < ai) {
uint32_t di;
if (uadd32_overflow(ai, bi, &di)) {
di = UINT32_MAX;
}
*(uint32_t *)(d + i) = di;
@ -1226,8 +1222,8 @@ void HELPER(gvec_usadd64)(void *d, void *a, void *b, uint32_t desc)
for (i = 0; i < oprsz; i += sizeof(uint64_t)) {
uint64_t ai = *(uint64_t *)(a + i);
uint64_t bi = *(uint64_t *)(b + i);
uint64_t di = ai + bi;
if (di < ai) {
uint64_t di;
if (uadd64_overflow(ai, bi, &di)) {
di = UINT64_MAX;
}
*(uint64_t *)(d + i) = di;
@ -1273,8 +1269,8 @@ void HELPER(gvec_ussub32)(void *d, void *a, void *b, uint32_t desc)
for (i = 0; i < oprsz; i += sizeof(uint32_t)) {
uint32_t ai = *(uint32_t *)(a + i);
uint32_t bi = *(uint32_t *)(b + i);
uint32_t di = ai - bi;
if (ai < bi) {
uint32_t di;
if (usub32_overflow(ai, bi, &di)) {
di = 0;
}
*(uint32_t *)(d + i) = di;
@ -1290,8 +1286,8 @@ void HELPER(gvec_ussub64)(void *d, void *a, void *b, uint32_t desc)
for (i = 0; i < oprsz; i += sizeof(uint64_t)) {
uint64_t ai = *(uint64_t *)(a + i);
uint64_t bi = *(uint64_t *)(b + i);
uint64_t di = ai - bi;
if (ai < bi) {
uint64_t di;
if (usub64_overflow(ai, bi, &di)) {
di = 0;
}
*(uint64_t *)(d + i) = di;