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| author | Stefan Berger <stefanb@linux.ibm.com> | 2021-07-09 11:39:00 -0400 |
|---|---|---|
| committer | Alexey Kardashevskiy <aik@ozlabs.ru> | 2021-07-11 23:46:49 +1000 |
| commit | e1362035a27e4fe3d3a82b70e92f4f2c48a61711 (patch) | |
| tree | 674cd3ba78f411fade68b592c941b422220c65a3 | |
| parent | cc4c4cb3c193dabdefe45db343c949452c081435 (diff) | |
| download | qemu-SLOF-e1362035a27e4fe3d3a82b70e92f4f2c48a61711.tar.gz | |
tcgbios: Use assembly for 32 bit rotr in sha256
Use assembly for the 32 bit rotr in the sha256 implementation
similar to the assembly used in the sha1 and sha512 implementations.
Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
| -rw-r--r-- | lib/libtpm/sha256.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/lib/libtpm/sha256.c b/lib/libtpm/sha256.c index c6b8767..1a0aa9a 100644 --- a/lib/libtpm/sha256.c +++ b/lib/libtpm/sha256.c @@ -22,10 +22,16 @@ typedef struct _sha256_ctx { uint32_t h[8]; } sha256_ctx; -static inline uint32_t rotr(uint32_t x, uint8_t n) -{ - return (x >> n) | (x << (32 - n)); -} +#define rotr(VAL, N) \ +({ \ + uint32_t res; \ + __asm__ ( \ + "rotrwi %0, %1, %2\n\t" \ + : "=r" (res) \ + : "r" (VAL), "i" (N) \ + ); \ + res; \ +}) static inline uint32_t Ch(uint32_t x, uint32_t y, uint32_t z) { |