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crypto: Add generic 64-bit carry-less multiply routine

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Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson
2023-07-11 10:10:47 +01:00
parent f56d3c1a14
commit 00f463b38a
3 changed files with 51 additions and 0 deletions
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19
include/crypto/clmul.h
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@@ -8,6 +8,9 @@
#ifndef CRYPTO_CLMUL_H
#define CRYPTO_CLMUL_H
#include "qemu/int128.h"
#include "host/crypto/clmul.h"
/**
* clmul_8x8_low:
*
@@ -61,4 +64,20 @@ uint64_t clmul_16x2_odd(uint64_t, uint64_t);
*/
uint64_t clmul_32(uint32_t, uint32_t);
/**
* clmul_64:
*
* Perform a 64x64->128 carry-less multiply.
*/
Int128 clmul_64_gen(uint64_t, uint64_t);
static inline Int128 clmul_64(uint64_t a, uint64_t b)
{
if (HAVE_CLMUL_ACCEL) {
return clmul_64_accel(a, b);
} else {
return clmul_64_gen(a, b);
}
}
#endif /* CRYPTO_CLMUL_H */