diff options
Diffstat (limited to 'vendor/golang.org/x/crypto/poly1305/sum_amd64.s')
| -rw-r--r-- | vendor/golang.org/x/crypto/poly1305/sum_amd64.s | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/vendor/golang.org/x/crypto/poly1305/sum_amd64.s b/vendor/golang.org/x/crypto/poly1305/sum_amd64.s new file mode 100644 index 0000000..2edae63 --- /dev/null +++ b/vendor/golang.org/x/crypto/poly1305/sum_amd64.s @@ -0,0 +1,125 @@ +// Copyright 2012 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// +build amd64,!gccgo,!appengine + +#include "textflag.h" + +#define POLY1305_ADD(msg, h0, h1, h2) \ + ADDQ 0(msg), h0; \ + ADCQ 8(msg), h1; \ + ADCQ $1, h2; \ + LEAQ 16(msg), msg + +#define POLY1305_MUL(h0, h1, h2, r0, r1, t0, t1, t2, t3) \ + MOVQ r0, AX; \ + MULQ h0; \ + MOVQ AX, t0; \ + MOVQ DX, t1; \ + MOVQ r0, AX; \ + MULQ h1; \ + ADDQ AX, t1; \ + ADCQ $0, DX; \ + MOVQ r0, t2; \ + IMULQ h2, t2; \ + ADDQ DX, t2; \ + \ + MOVQ r1, AX; \ + MULQ h0; \ + ADDQ AX, t1; \ + ADCQ $0, DX; \ + MOVQ DX, h0; \ + MOVQ r1, t3; \ + IMULQ h2, t3; \ + MOVQ r1, AX; \ + MULQ h1; \ + ADDQ AX, t2; \ + ADCQ DX, t3; \ + ADDQ h0, t2; \ + ADCQ $0, t3; \ + \ + MOVQ t0, h0; \ + MOVQ t1, h1; \ + MOVQ t2, h2; \ + ANDQ $3, h2; \ + MOVQ t2, t0; \ + ANDQ $0xFFFFFFFFFFFFFFFC, t0; \ + ADDQ t0, h0; \ + ADCQ t3, h1; \ + ADCQ $0, h2; \ + SHRQ $2, t3, t2; \ + SHRQ $2, t3; \ + ADDQ t2, h0; \ + ADCQ t3, h1; \ + ADCQ $0, h2 + +DATA ·poly1305Mask<>+0x00(SB)/8, $0x0FFFFFFC0FFFFFFF +DATA ·poly1305Mask<>+0x08(SB)/8, $0x0FFFFFFC0FFFFFFC +GLOBL ·poly1305Mask<>(SB), RODATA, $16 + +// func poly1305(out *[16]byte, m *byte, mlen uint64, key *[32]key) +TEXT ·poly1305(SB), $0-32 + MOVQ out+0(FP), DI + MOVQ m+8(FP), SI + MOVQ mlen+16(FP), R15 + MOVQ key+24(FP), AX + + MOVQ 0(AX), R11 + MOVQ 8(AX), R12 + ANDQ ·poly1305Mask<>(SB), R11 // r0 + ANDQ ·poly1305Mask<>+8(SB), R12 // r1 + XORQ R8, R8 // h0 + XORQ R9, R9 // h1 + XORQ R10, R10 // h2 + + CMPQ R15, $16 + JB bytes_between_0_and_15 + +loop: + POLY1305_ADD(SI, R8, R9, R10) + +multiply: + POLY1305_MUL(R8, R9, R10, R11, R12, BX, CX, R13, R14) + SUBQ $16, R15 + CMPQ R15, $16 + JAE loop + +bytes_between_0_and_15: + TESTQ R15, R15 + JZ done + MOVQ $1, BX + XORQ CX, CX + XORQ R13, R13 + ADDQ R15, SI + +flush_buffer: + SHLQ $8, BX, CX + SHLQ $8, BX + MOVB -1(SI), R13 + XORQ R13, BX + DECQ SI + DECQ R15 + JNZ flush_buffer + + ADDQ BX, R8 + ADCQ CX, R9 + ADCQ $0, R10 + MOVQ $16, R15 + JMP multiply + +done: + MOVQ R8, AX + MOVQ R9, BX + SUBQ $0xFFFFFFFFFFFFFFFB, AX + SBBQ $0xFFFFFFFFFFFFFFFF, BX + SBBQ $3, R10 + CMOVQCS R8, AX + CMOVQCS R9, BX + MOVQ key+24(FP), R8 + ADDQ 16(R8), AX + ADCQ 24(R8), BX + + MOVQ AX, 0(DI) + MOVQ BX, 8(DI) + RET |