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add more asm

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源文雨
2022-10-02 23:57:35 +08:00
parent f6d737d0a6
commit f084ae5128
4 changed files with 132 additions and 32 deletions
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88
encode_amd64.s
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@@ -64,3 +64,91 @@ lop:
STOSQ
LOOP lop
RET
// enc64blk2(mask uint64, in, out []byte)
// len(in)!=0, len(out)==len(in)*8
TEXT ·enc64blk2(SB), NOSPLIT, $0-56
// load mask
MOVQ ·mask+0(FP), BX
// load source addr
MOVQ ·in+8(FP), SI
// load source len
MOVQ ·inlen+16(FP), CX
// load dest addr
MOVQ ·out+32(FP), DI
// go forward
CLD
lop:
LODSB
// 8 -> 64
SHLL $10, AX
MOVL AX, DX
ANDL $0x00030000, DX
RORQ $14, AX
MOVL AX, R8
ANDL $0x00000003, R8
ORL R8, DX
SHLQ $32, DX
ROLQ $4, AX
MOVL AX, R8
ANDL $0x00000003, R8
ORQ R8, DX
SHLL $14, AX
ANDL $0x00030000, AX
ORQ AX, DX
// add mask
LEAQ 0(DX)(BX*1), AX
BSWAPQ AX
STOSQ
LOOP lop
RET
// enc32blk4(mask uint32, in, out []byte)
// len(in)!=0, len(out)==len(in)*4
TEXT ·enc32blk4(SB), NOSPLIT, $0-56
// load mask
MOVQ ·mask+0(FP), BX
// load source addr
MOVQ ·in+8(FP), SI
// load source len
MOVQ ·inlen+16(FP), CX
// load dest addr
MOVQ ·out+32(FP), DI
// go forward
CLD
lop:
LODSB
// 8 -> 32
MOVL AX, DX
ANDL $0x0f, DX
SHLL $12, AX
ANDL $0x000f0000, AX
ORL AX, DX
// add mask
LEAL 0(DX)(BX*1), AX
BSWAPL AX
STOSL
LOOP lop
RET
// func enc16blk8(mask uint16, in, out []byte)
// len(in)!=0, len(out)==len(in)*2
TEXT ·enc16blk8(SB), NOSPLIT, $0-56
// load mask
MOVQ ·mask+0(FP), BX
// load source addr
MOVQ ·in+8(FP), SI
// load source len
MOVQ ·inlen+16(FP), CX
// load dest addr
MOVQ ·out+32(FP), DI
// go forward
CLD
lop:
LODSB
// add mask
LEAW 0(AX)(BX*1), AX
RORW $8, AX
STOSW
LOOP lop
RET