diff options
| author | Richard Henderson <richard.henderson@linaro.org> | 2023-06-01 16:05:29 -0700 |
|---|---|---|
| committer | Richard Henderson <richard.henderson@linaro.org> | 2023-07-08 07:30:17 +0100 |
| commit | e20e14d2b15d5ad4fb0a640c95d7c1bc534d9fd7 (patch) | |
| tree | 253dc669d7d0fcac625c60e096f63dc3becbec15 /crypto | |
| parent | fb250c59aa7f595d65b73a5d87076d047970ba1d (diff) | |
crypto/aes: Add AES_SH, AES_ISH macros
These macros will constant fold and avoid the indirection through
memory when fully unrolling some new primitives.
Acked-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Diffstat (limited to 'crypto')
| -rw-r--r-- | crypto/aes.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/crypto/aes.c b/crypto/aes.c index 67bb74b8e3..e65c97e0c1 100644 --- a/crypto/aes.c +++ b/crypto/aes.c @@ -108,12 +108,24 @@ const uint8_t AES_isbox[256] = { 0xE1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0C, 0x7D, }; +/* AES ShiftRows, for complete unrolling. */ +#define AES_SH(X) (((X) * 5) & 15) + const uint8_t AES_shifts[16] = { - 0, 5, 10, 15, 4, 9, 14, 3, 8, 13, 2, 7, 12, 1, 6, 11 + AES_SH(0x0), AES_SH(0x1), AES_SH(0x2), AES_SH(0x3), + AES_SH(0x4), AES_SH(0x5), AES_SH(0x6), AES_SH(0x7), + AES_SH(0x8), AES_SH(0x9), AES_SH(0xA), AES_SH(0xB), + AES_SH(0xC), AES_SH(0xD), AES_SH(0xE), AES_SH(0xF), }; +/* AES InvShiftRows, for complete unrolling. */ +#define AES_ISH(X) (((X) * 13) & 15) + const uint8_t AES_ishifts[16] = { - 0, 13, 10, 7, 4, 1, 14, 11, 8, 5, 2, 15, 12, 9, 6, 3 + AES_ISH(0x0), AES_ISH(0x1), AES_ISH(0x2), AES_ISH(0x3), + AES_ISH(0x4), AES_ISH(0x5), AES_ISH(0x6), AES_ISH(0x7), + AES_ISH(0x8), AES_ISH(0x9), AES_ISH(0xA), AES_ISH(0xB), + AES_ISH(0xC), AES_ISH(0xD), AES_ISH(0xE), AES_ISH(0xF), }; /* |