e022ff88d
Denys Vlasenko
2025-07-22
Subject
libbb: SHA-NI - document that unpckhpd also works, no code changes
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libbb/hash_sha256_hwaccel_x86-32.S+2 -0
| @@ -66,11 +66,13 @@ sha256_process_block64_shaNI: | |
| // movhlps MSG, MSG // abcd -> cdcd (3 bytes of code) | |
| // shuf128_32 SHUF(2,3,n,n), MSG, MSG // abcd -> cdXX (4 bytes) | |
| // punpckhqdq MSG, MSG // abcd -> cdcd (4 bytes) | |
| + | // unpckhpd MSG, MSG // abcd -> cdcd (4 bytes) |
| // psrldq $8, MSG // abcd -> cd00 (5 bytes) | |
| // palignr $8, MSG, MSG // abcd -> cdab (6 bytes, SSSE3 insn) | |
| #define MOVE_UPPER64_DOWN(reg) movhlps reg, reg | |
| //#define MOVE_UPPER64_DOWN(reg) shuf128_32 SHUF(2,3,0,0), reg, reg | |
| //#define MOVE_UPPER64_DOWN(reg) punpckhqdq reg, reg | |
| + | //#define MOVE_UPPER64_DOWN(reg) unpckhpd reg, reg |
| //#define MOVE_UPPER64_DOWN(reg) psrldq $8, reg | |
| //#define MOVE_UPPER64_DOWN(reg) palignr $8, reg, reg | |
libbb/hash_sha256_hwaccel_x86-64.S+2 -0
| @@ -73,11 +73,13 @@ sha256_process_block64_shaNI: | |
| // movhlps MSG, MSG // abcd -> cdcd (3 bytes of code) | |
| // shuf128_32 SHUF(2,3,n,n), MSG, MSG // abcd -> cdXX (4 bytes) | |
| // punpckhqdq MSG, MSG // abcd -> cdcd (4 bytes) | |
| + | // unpckhpd MSG, MSG // abcd -> cdcd (4 bytes) |
| // psrldq $8, MSG // abcd -> cd00 (5 bytes) | |
| // palignr $8, MSG, MSG // abcd -> cdab (6 bytes, SSSE3 insn) | |
| #define MOVE_UPPER64_DOWN(reg) movhlps reg, reg | |
| //#define MOVE_UPPER64_DOWN(reg) shuf128_32 SHUF(2,3,0,0), reg, reg | |
| //#define MOVE_UPPER64_DOWN(reg) punpckhqdq reg, reg | |
| + | //#define MOVE_UPPER64_DOWN(reg) unpckhpd reg, reg |
| //#define MOVE_UPPER64_DOWN(reg) psrldq $8, reg | |
| //#define MOVE_UPPER64_DOWN(reg) palignr $8, reg, reg | |