Commit db6e2e65 authored by Peter Maydell's avatar Peter Maydell Committed by Aurelien Jarno
Browse files

target-arm: Fix GE bits for v6media signed modulo arithmetic



Fix the signed modulo arithmetic helpers for the v6media
instructions (SADD8, SSUB8, SADD16, SSUB16, SASX, SSAX) to set
the GE bits correctly (based on the result of the add or subtract
before it is truncated to 16 bits, not after).
Signed-off-by: default avatarPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: default avatarAurelien Jarno <aurelien@aurel32.net>
parent 2a0308c5
......@@ -2171,7 +2171,7 @@ static inline uint8_t sub8_usat(uint8_t a, uint8_t b)
/* Signed modulo arithmetic. */
#define SARITH16(a, b, n, op) do { \
int32_t sum; \
sum = (int16_t)((uint16_t)(a) op (uint16_t)(b)); \
sum = (int32_t)(int16_t)(a) op (int32_t)(int16_t)(b); \
RESULT(sum, n, 16); \
if (sum >= 0) \
ge |= 3 << (n * 2); \
......@@ -2179,7 +2179,7 @@ static inline uint8_t sub8_usat(uint8_t a, uint8_t b)
#define SARITH8(a, b, n, op) do { \
int32_t sum; \
sum = (int8_t)((uint8_t)(a) op (uint8_t)(b)); \
sum = (int32_t)(int8_t)(a) op (int32_t)(int8_t)(b); \
RESULT(sum, n, 8); \
if (sum >= 0) \
ge |= 1 << n; \
......
Supports Markdown
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment