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chacha20poly1305: guard PSHUFB usage with GOAMD64_v2 

The PSHUFB instruction is part of SSE which is only v2+ but it is being
used without the GOAMD64_v2 guard.

The ROL macros were copied from CL 516859 that adds internal/chacha8rand.

Fixes golang/go#63871

Change-Id: I3c8ba75ff284cda4fc788885643246936e617b85
GitHub-Last-Rev: e235e8eae6
GitHub-Pull-Request: golang/crypto#275
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/538786
Reviewed-by: Keith Randall <khr@google.com>
Run-TryBot: Mauri de Souza Meneguzzo <mauri870@gmail.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>
pull/240/head
Mauri de Souza Meneguzzo 2023-11-07 18:34:49 +00:00 committed by Russ Cox
parent 74c2ba9521
commit df0bc9e1bb
1 changed files with 22 additions and 2 deletions
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24
chacha20poly1305/chacha20poly1305_amd64.s
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@ -183,11 +183,31 @@ GLOBL ·andMask<>(SB), (NOPTR+RODATA), $240
#define shiftD1Right BYTE $0x66; BYTE $0x45; BYTE $0x0f; BYTE $0x3a; BYTE $0x0f; BYTE $0xd2; BYTE $0x04 // PALIGNR $4, X10, X10
#define shiftD2Right BYTE $0x66; BYTE $0x45; BYTE $0x0f; BYTE $0x3a; BYTE $0x0f; BYTE $0xdb; BYTE $0x04 // PALIGNR $4, X11, X11
#define shiftD3Right BYTE $0x66; BYTE $0x45; BYTE $0x0f; BYTE $0x3a; BYTE $0x0f; BYTE $0xff; BYTE $0x04 // PALIGNR $4, X15, X15
// Some macros
// ROL rotates the uint32s in register R left by N bits, using temporary T.
#define ROL(N, R, T) \
MOVO R, T; PSLLL $(N), T; PSRLL $(32-(N)), R; PXOR T, R
// ROL16 rotates the uint32s in register R left by 16, using temporary T if needed.
#ifdef GOAMD64_v2
#define ROL16(R, T) PSHUFB ·rol16<>(SB), R
#else
#define ROL16(R, T) ROL(16, R, T)
#endif
// ROL8 rotates the uint32s in register R left by 8, using temporary T if needed.
#ifdef GOAMD64_v2
#define ROL8(R, T) PSHUFB ·rol8<>(SB), R
#else
#define ROL8(R, T) ROL(8, R, T)
#endif
#define chachaQR(A, B, C, D, T) \
PADDD B, A; PXOR A, D; PSHUFB ·rol16<>(SB), D \
PADDD B, A; PXOR A, D; ROL16(D, T) \
PADDD D, C; PXOR C, B; MOVO B, T; PSLLL $12, T; PSRLL $20, B; PXOR T, B \
PADDD B, A; PXOR A, D; PSHUFB ·rol8<>(SB), D \
PADDD B, A; PXOR A, D; ROL8(D, T) \
PADDD D, C; PXOR C, B; MOVO B, T; PSLLL $7, T; PSRLL $25, B; PXOR T, B
#define chachaQR_AVX2(A, B, C, D, T) \