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89 lines
2.6 KiB
89 lines
2.6 KiB
3 years ago
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// Code generated by command: go run encode_asm.go -pkg base64 -out ../base64/encode_amd64.s -stubs ../base64/encode_amd64.go. DO NOT EDIT.
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//go:build !purego
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// +build !purego
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#include "textflag.h"
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// func encodeAVX2(dst []byte, src []byte, lut *int8) (int, int)
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// Requires: AVX, AVX2, SSE4.1
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TEXT ·encodeAVX2(SB), NOSPLIT, $0-72
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MOVQ dst_base+0(FP), AX
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MOVQ src_base+24(FP), DX
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MOVQ lut+48(FP), SI
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MOVQ src_len+32(FP), DI
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MOVB $0x33, CL
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PINSRB $0x00, CX, X4
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VPBROADCASTB X4, Y4
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MOVB $0x19, CL
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PINSRB $0x00, CX, X5
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VPBROADCASTB X5, Y5
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XORQ CX, CX
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XORQ BX, BX
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// Load the 16-byte LUT into both lanes of the register
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VPERMQ $0x44, (SI), Y3
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// Load the first block using a mask to avoid potential fault
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VMOVDQU b64_enc_load<>+0(SB), Y0
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VPMASKMOVD -4(DX)(BX*1), Y0, Y0
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loop:
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VPSHUFB b64_enc_shuf<>+0(SB), Y0, Y0
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VPAND b64_enc_mask1<>+0(SB), Y0, Y1
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VPSLLW $0x08, Y1, Y2
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VPSLLW $0x04, Y1, Y1
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VPBLENDW $0xaa, Y2, Y1, Y2
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VPAND b64_enc_mask2<>+0(SB), Y0, Y1
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VPMULHUW b64_enc_mult<>+0(SB), Y1, Y0
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VPOR Y0, Y2, Y0
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VPSUBUSB Y4, Y0, Y1
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VPCMPGTB Y5, Y0, Y2
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VPSUBB Y2, Y1, Y1
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VPSHUFB Y1, Y3, Y1
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VPADDB Y0, Y1, Y0
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VMOVDQU Y0, (AX)(CX*1)
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ADDQ $0x20, CX
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ADDQ $0x18, BX
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SUBQ $0x18, DI
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CMPQ DI, $0x20
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JB done
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VMOVDQU -4(DX)(BX*1), Y0
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JMP loop
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done:
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MOVQ CX, ret+56(FP)
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MOVQ BX, ret1+64(FP)
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VZEROUPPER
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RET
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DATA b64_enc_load<>+0(SB)/8, $0x8000000000000000
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DATA b64_enc_load<>+8(SB)/8, $0x8000000080000000
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DATA b64_enc_load<>+16(SB)/8, $0x8000000080000000
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DATA b64_enc_load<>+24(SB)/8, $0x8000000080000000
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GLOBL b64_enc_load<>(SB), RODATA|NOPTR, $32
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DATA b64_enc_shuf<>+0(SB)/8, $0x0809070805060405
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DATA b64_enc_shuf<>+8(SB)/8, $0x0e0f0d0e0b0c0a0b
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DATA b64_enc_shuf<>+16(SB)/8, $0x0405030401020001
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DATA b64_enc_shuf<>+24(SB)/8, $0x0a0b090a07080607
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GLOBL b64_enc_shuf<>(SB), RODATA|NOPTR, $32
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DATA b64_enc_mask1<>+0(SB)/8, $0x003f03f0003f03f0
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DATA b64_enc_mask1<>+8(SB)/8, $0x003f03f0003f03f0
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DATA b64_enc_mask1<>+16(SB)/8, $0x003f03f0003f03f0
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DATA b64_enc_mask1<>+24(SB)/8, $0x003f03f0003f03f0
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GLOBL b64_enc_mask1<>(SB), RODATA|NOPTR, $32
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DATA b64_enc_mask2<>+0(SB)/8, $0x0fc0fc000fc0fc00
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DATA b64_enc_mask2<>+8(SB)/8, $0x0fc0fc000fc0fc00
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DATA b64_enc_mask2<>+16(SB)/8, $0x0fc0fc000fc0fc00
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DATA b64_enc_mask2<>+24(SB)/8, $0x0fc0fc000fc0fc00
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GLOBL b64_enc_mask2<>(SB), RODATA|NOPTR, $32
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DATA b64_enc_mult<>+0(SB)/8, $0x0400004004000040
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DATA b64_enc_mult<>+8(SB)/8, $0x0400004004000040
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DATA b64_enc_mult<>+16(SB)/8, $0x0400004004000040
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DATA b64_enc_mult<>+24(SB)/8, $0x0400004004000040
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GLOBL b64_enc_mult<>(SB), RODATA|NOPTR, $32
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