diff options
| author | Joel Sing <jsing@cvs.openbsd.org> | 2023-06-21 07:56:44 +0000 |
|---|---|---|
| committer | Joel Sing <jsing@cvs.openbsd.org> | 2023-06-21 07:56:44 +0000 |
| commit | ba393905053c6025b80d50b428c707bf65af63e8 (patch) | |
| tree | 908983cc07b6e0839b806687ee830c7a21db2ca9 /lib/libcrypto/bn | |
| parent | 786f399cae7d341e91b832983c0d14bb691826cc (diff) | |
Provide optimised bn_clzw() for aarch64.
Diffstat (limited to 'lib/libcrypto/bn')
| -rw-r--r-- | lib/libcrypto/bn/arch/aarch64/bn_arch.h | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/lib/libcrypto/bn/arch/aarch64/bn_arch.h b/lib/libcrypto/bn/arch/aarch64/bn_arch.h index aa780e09e91..66de3682d4c 100644 --- a/lib/libcrypto/bn/arch/aarch64/bn_arch.h +++ b/lib/libcrypto/bn/arch/aarch64/bn_arch.h @@ -1,4 +1,4 @@ -/* $OpenBSD: bn_arch.h,v 1.11 2023/06/17 15:40:46 jsing Exp $ */ +/* $OpenBSD: bn_arch.h,v 1.12 2023/06/21 07:56:43 jsing Exp $ */ /* * Copyright (c) 2023 Joel Sing <jsing@openbsd.org> * @@ -24,6 +24,20 @@ #if defined(__GNUC__) +#define HAVE_BN_CLZW + +static inline int +bn_clzw(BN_ULONG w) +{ + BN_ULONG n; + + __asm__ ("clz %[n], %[w]" + : [n]"=r"(n) + : [w]"r"(w)); + + return n; +} + #define HAVE_BN_ADDW static inline void |