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| author | Peter Maydell | 2011-03-10 19:51:49 +0100 |
|---|---|---|
| committer | Aurelien Jarno | 2011-03-22 07:52:36 +0100 |
| commit | db6e2e65adddfcdc3f81026df7fd490e13813e8a (patch) | |
| tree | c3dea200c8c775ed04a122183450909a6c62cc46 /target-arm/helper.c | |
| parent | target-arm: Fix UNDEF cases in Thumb load/store (diff) | |
| download | qemu-db6e2e65adddfcdc3f81026df7fd490e13813e8a.tar.gz qemu-db6e2e65adddfcdc3f81026df7fd490e13813e8a.tar.xz qemu-db6e2e65adddfcdc3f81026df7fd490e13813e8a.zip | |
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: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Diffstat (limited to 'target-arm/helper.c')
| -rw-r--r-- | target-arm/helper.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/target-arm/helper.c b/target-arm/helper.c index d360121397..4f2b44036f 100644 --- a/target-arm/helper.c +++ b/target-arm/helper.c @@ -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; \ |