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decompress_amd64.s
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decompress_amd64.s
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// Code generated by command: go run gen.go -out ../decompress_amd64.s -pkg=huff0. DO NOT EDIT.
//go:build amd64 && !appengine && !noasm && gc
// func decompress4x_main_loop_amd64(ctx *decompress4xContext)
TEXT ·decompress4x_main_loop_amd64(SB), $0-8
XORQ DX, DX
// Preload values
MOVQ ctx+0(FP), AX
MOVBQZX 8(AX), DI
MOVQ 16(AX), SI
MOVQ 48(AX), BX
MOVQ 24(AX), R9
MOVQ 32(AX), R10
MOVQ (AX), R11
// Main loop
main_loop:
MOVQ SI, R8
CMPQ R8, BX
SETGE DL
// br0.fillFast32()
MOVQ 32(R11), R12
MOVBQZX 40(R11), R13
CMPQ R13, $0x20
JBE skip_fill0
MOVQ 24(R11), AX
SUBQ $0x20, R13
SUBQ $0x04, AX
MOVQ (R11), R14
// b.value |= uint64(low) << (b.bitsRead & 63)
MOVL (AX)(R14*1), R14
MOVQ R13, CX
SHLQ CL, R14
MOVQ AX, 24(R11)
ORQ R14, R12
// exhausted = exhausted || (br0.off < 4)
CMPQ AX, $0x04
SETLT AL
ORB AL, DL
skip_fill0:
// val0 := br0.peekTopBits(peekBits)
MOVQ R12, R14
MOVQ DI, CX
SHRQ CL, R14
// v0 := table[val0&mask]
MOVW (R10)(R14*2), CX
// br0.advance(uint8(v0.entry)
MOVB CH, AL
SHLQ CL, R12
ADDB CL, R13
// val1 := br0.peekTopBits(peekBits)
MOVQ DI, CX
MOVQ R12, R14
SHRQ CL, R14
// v1 := table[val1&mask]
MOVW (R10)(R14*2), CX
// br0.advance(uint8(v1.entry))
MOVB CH, AH
SHLQ CL, R12
ADDB CL, R13
// these two writes get coalesced
// out[id * dstEvery + 0] = uint8(v0.entry >> 8)
// out[id * dstEvery + 1] = uint8(v1.entry >> 8)
MOVW AX, (R8)
// update the bitreader structure
MOVQ R12, 32(R11)
MOVB R13, 40(R11)
ADDQ R9, R8
// br1.fillFast32()
MOVQ 80(R11), R12
MOVBQZX 88(R11), R13
CMPQ R13, $0x20
JBE skip_fill1
MOVQ 72(R11), AX
SUBQ $0x20, R13
SUBQ $0x04, AX
MOVQ 48(R11), R14
// b.value |= uint64(low) << (b.bitsRead & 63)
MOVL (AX)(R14*1), R14
MOVQ R13, CX
SHLQ CL, R14
MOVQ AX, 72(R11)
ORQ R14, R12
// exhausted = exhausted || (br1.off < 4)
CMPQ AX, $0x04
SETLT AL
ORB AL, DL
skip_fill1:
// val0 := br1.peekTopBits(peekBits)
MOVQ R12, R14
MOVQ DI, CX
SHRQ CL, R14
// v0 := table[val0&mask]
MOVW (R10)(R14*2), CX
// br1.advance(uint8(v0.entry)
MOVB CH, AL
SHLQ CL, R12
ADDB CL, R13
// val1 := br1.peekTopBits(peekBits)
MOVQ DI, CX
MOVQ R12, R14
SHRQ CL, R14
// v1 := table[val1&mask]
MOVW (R10)(R14*2), CX
// br1.advance(uint8(v1.entry))
MOVB CH, AH
SHLQ CL, R12
ADDB CL, R13
// these two writes get coalesced
// out[id * dstEvery + 0] = uint8(v0.entry >> 8)
// out[id * dstEvery + 1] = uint8(v1.entry >> 8)
MOVW AX, (R8)
// update the bitreader structure
MOVQ R12, 80(R11)
MOVB R13, 88(R11)
ADDQ R9, R8
// br2.fillFast32()
MOVQ 128(R11), R12
MOVBQZX 136(R11), R13
CMPQ R13, $0x20
JBE skip_fill2
MOVQ 120(R11), AX
SUBQ $0x20, R13
SUBQ $0x04, AX
MOVQ 96(R11), R14
// b.value |= uint64(low) << (b.bitsRead & 63)
MOVL (AX)(R14*1), R14
MOVQ R13, CX
SHLQ CL, R14
MOVQ AX, 120(R11)
ORQ R14, R12
// exhausted = exhausted || (br2.off < 4)
CMPQ AX, $0x04
SETLT AL
ORB AL, DL
skip_fill2:
// val0 := br2.peekTopBits(peekBits)
MOVQ R12, R14
MOVQ DI, CX
SHRQ CL, R14
// v0 := table[val0&mask]
MOVW (R10)(R14*2), CX
// br2.advance(uint8(v0.entry)
MOVB CH, AL
SHLQ CL, R12
ADDB CL, R13
// val1 := br2.peekTopBits(peekBits)
MOVQ DI, CX
MOVQ R12, R14
SHRQ CL, R14
// v1 := table[val1&mask]
MOVW (R10)(R14*2), CX
// br2.advance(uint8(v1.entry))
MOVB CH, AH
SHLQ CL, R12
ADDB CL, R13
// these two writes get coalesced
// out[id * dstEvery + 0] = uint8(v0.entry >> 8)
// out[id * dstEvery + 1] = uint8(v1.entry >> 8)
MOVW AX, (R8)
// update the bitreader structure
MOVQ R12, 128(R11)
MOVB R13, 136(R11)
ADDQ R9, R8
// br3.fillFast32()
MOVQ 176(R11), R12
MOVBQZX 184(R11), R13
CMPQ R13, $0x20
JBE skip_fill3
MOVQ 168(R11), AX
SUBQ $0x20, R13
SUBQ $0x04, AX
MOVQ 144(R11), R14
// b.value |= uint64(low) << (b.bitsRead & 63)
MOVL (AX)(R14*1), R14
MOVQ R13, CX
SHLQ CL, R14
MOVQ AX, 168(R11)
ORQ R14, R12
// exhausted = exhausted || (br3.off < 4)
CMPQ AX, $0x04
SETLT AL
ORB AL, DL
skip_fill3:
// val0 := br3.peekTopBits(peekBits)
MOVQ R12, R14
MOVQ DI, CX
SHRQ CL, R14
// v0 := table[val0&mask]
MOVW (R10)(R14*2), CX
// br3.advance(uint8(v0.entry)
MOVB CH, AL
SHLQ CL, R12
ADDB CL, R13
// val1 := br3.peekTopBits(peekBits)
MOVQ DI, CX
MOVQ R12, R14
SHRQ CL, R14
// v1 := table[val1&mask]
MOVW (R10)(R14*2), CX
// br3.advance(uint8(v1.entry))
MOVB CH, AH
SHLQ CL, R12
ADDB CL, R13
// these two writes get coalesced
// out[id * dstEvery + 0] = uint8(v0.entry >> 8)
// out[id * dstEvery + 1] = uint8(v1.entry >> 8)
MOVW AX, (R8)
// update the bitreader structure
MOVQ R12, 176(R11)
MOVB R13, 184(R11)
ADDQ $0x02, SI
TESTB DL, DL
JZ main_loop
MOVQ ctx+0(FP), AX
SUBQ 16(AX), SI
SHLQ $0x02, SI
MOVQ SI, 40(AX)
RET
// func decompress4x_8b_main_loop_amd64(ctx *decompress4xContext)
TEXT ·decompress4x_8b_main_loop_amd64(SB), $0-8
XORQ DX, DX
// Preload values
MOVQ ctx+0(FP), CX
MOVBQZX 8(CX), DI
MOVQ 16(CX), BX
MOVQ 48(CX), SI
MOVQ 24(CX), R9
MOVQ 32(CX), R10
MOVQ (CX), R11
// Main loop
main_loop:
MOVQ BX, R8
CMPQ R8, SI
SETGE DL
// br0.fillFast32()
MOVQ 32(R11), R12
MOVBQZX 40(R11), R13
CMPQ R13, $0x20
JBE skip_fill0
MOVQ 24(R11), R14
SUBQ $0x20, R13
SUBQ $0x04, R14
MOVQ (R11), R15
// b.value |= uint64(low) << (b.bitsRead & 63)
MOVL (R14)(R15*1), R15
MOVQ R13, CX
SHLQ CL, R15
MOVQ R14, 24(R11)
ORQ R15, R12
// exhausted = exhausted || (br0.off < 4)
CMPQ R14, $0x04
SETLT AL
ORB AL, DL
skip_fill0:
// val0 := br0.peekTopBits(peekBits)
MOVQ R12, R14
MOVQ DI, CX
SHRQ CL, R14
// v0 := table[val0&mask]
MOVW (R10)(R14*2), CX
// br0.advance(uint8(v0.entry)
MOVB CH, AL
SHLQ CL, R12
ADDB CL, R13
// val1 := br0.peekTopBits(peekBits)
MOVQ R12, R14
MOVQ DI, CX
SHRQ CL, R14
// v1 := table[val0&mask]
MOVW (R10)(R14*2), CX
// br0.advance(uint8(v1.entry)
MOVB CH, AH
SHLQ CL, R12
ADDB CL, R13
BSWAPL AX
// val2 := br0.peekTopBits(peekBits)
MOVQ R12, R14
MOVQ DI, CX
SHRQ CL, R14
// v2 := table[val0&mask]
MOVW (R10)(R14*2), CX
// br0.advance(uint8(v2.entry)
MOVB CH, AH
SHLQ CL, R12
ADDB CL, R13
// val3 := br0.peekTopBits(peekBits)
MOVQ R12, R14
MOVQ DI, CX
SHRQ CL, R14
// v3 := table[val0&mask]
MOVW (R10)(R14*2), CX
// br0.advance(uint8(v3.entry)
MOVB CH, AL
SHLQ CL, R12
ADDB CL, R13
BSWAPL AX
// these four writes get coalesced
// out[id * dstEvery + 0] = uint8(v0.entry >> 8)
// out[id * dstEvery + 1] = uint8(v1.entry >> 8)
// out[id * dstEvery + 3] = uint8(v2.entry >> 8)
// out[id * dstEvery + 4] = uint8(v3.entry >> 8)
MOVL AX, (R8)
// update the bitreader structure
MOVQ R12, 32(R11)
MOVB R13, 40(R11)
ADDQ R9, R8
// br1.fillFast32()
MOVQ 80(R11), R12
MOVBQZX 88(R11), R13
CMPQ R13, $0x20
JBE skip_fill1
MOVQ 72(R11), R14
SUBQ $0x20, R13
SUBQ $0x04, R14
MOVQ 48(R11), R15
// b.value |= uint64(low) << (b.bitsRead & 63)
MOVL (R14)(R15*1), R15
MOVQ R13, CX
SHLQ CL, R15
MOVQ R14, 72(R11)
ORQ R15, R12
// exhausted = exhausted || (br1.off < 4)
CMPQ R14, $0x04
SETLT AL
ORB AL, DL
skip_fill1:
// val0 := br1.peekTopBits(peekBits)
MOVQ R12, R14
MOVQ DI, CX
SHRQ CL, R14
// v0 := table[val0&mask]
MOVW (R10)(R14*2), CX
// br1.advance(uint8(v0.entry)
MOVB CH, AL
SHLQ CL, R12
ADDB CL, R13
// val1 := br1.peekTopBits(peekBits)
MOVQ R12, R14
MOVQ DI, CX
SHRQ CL, R14
// v1 := table[val0&mask]
MOVW (R10)(R14*2), CX
// br1.advance(uint8(v1.entry)
MOVB CH, AH
SHLQ CL, R12
ADDB CL, R13
BSWAPL AX
// val2 := br1.peekTopBits(peekBits)
MOVQ R12, R14
MOVQ DI, CX
SHRQ CL, R14
// v2 := table[val0&mask]
MOVW (R10)(R14*2), CX
// br1.advance(uint8(v2.entry)
MOVB CH, AH
SHLQ CL, R12
ADDB CL, R13
// val3 := br1.peekTopBits(peekBits)
MOVQ R12, R14
MOVQ DI, CX
SHRQ CL, R14
// v3 := table[val0&mask]
MOVW (R10)(R14*2), CX
// br1.advance(uint8(v3.entry)
MOVB CH, AL
SHLQ CL, R12
ADDB CL, R13
BSWAPL AX
// these four writes get coalesced
// out[id * dstEvery + 0] = uint8(v0.entry >> 8)
// out[id * dstEvery + 1] = uint8(v1.entry >> 8)
// out[id * dstEvery + 3] = uint8(v2.entry >> 8)
// out[id * dstEvery + 4] = uint8(v3.entry >> 8)
MOVL AX, (R8)
// update the bitreader structure
MOVQ R12, 80(R11)
MOVB R13, 88(R11)
ADDQ R9, R8
// br2.fillFast32()
MOVQ 128(R11), R12
MOVBQZX 136(R11), R13
CMPQ R13, $0x20
JBE skip_fill2
MOVQ 120(R11), R14
SUBQ $0x20, R13
SUBQ $0x04, R14
MOVQ 96(R11), R15
// b.value |= uint64(low) << (b.bitsRead & 63)
MOVL (R14)(R15*1), R15
MOVQ R13, CX
SHLQ CL, R15
MOVQ R14, 120(R11)
ORQ R15, R12
// exhausted = exhausted || (br2.off < 4)
CMPQ R14, $0x04
SETLT AL
ORB AL, DL
skip_fill2:
// val0 := br2.peekTopBits(peekBits)
MOVQ R12, R14
MOVQ DI, CX
SHRQ CL, R14
// v0 := table[val0&mask]
MOVW (R10)(R14*2), CX
// br2.advance(uint8(v0.entry)
MOVB CH, AL
SHLQ CL, R12
ADDB CL, R13
// val1 := br2.peekTopBits(peekBits)
MOVQ R12, R14
MOVQ DI, CX
SHRQ CL, R14
// v1 := table[val0&mask]
MOVW (R10)(R14*2), CX
// br2.advance(uint8(v1.entry)
MOVB CH, AH
SHLQ CL, R12
ADDB CL, R13
BSWAPL AX
// val2 := br2.peekTopBits(peekBits)
MOVQ R12, R14
MOVQ DI, CX
SHRQ CL, R14
// v2 := table[val0&mask]
MOVW (R10)(R14*2), CX
// br2.advance(uint8(v2.entry)
MOVB CH, AH
SHLQ CL, R12
ADDB CL, R13
// val3 := br2.peekTopBits(peekBits)
MOVQ R12, R14
MOVQ DI, CX
SHRQ CL, R14
// v3 := table[val0&mask]
MOVW (R10)(R14*2), CX
// br2.advance(uint8(v3.entry)
MOVB CH, AL
SHLQ CL, R12
ADDB CL, R13
BSWAPL AX
// these four writes get coalesced
// out[id * dstEvery + 0] = uint8(v0.entry >> 8)
// out[id * dstEvery + 1] = uint8(v1.entry >> 8)
// out[id * dstEvery + 3] = uint8(v2.entry >> 8)
// out[id * dstEvery + 4] = uint8(v3.entry >> 8)
MOVL AX, (R8)
// update the bitreader structure
MOVQ R12, 128(R11)
MOVB R13, 136(R11)
ADDQ R9, R8
// br3.fillFast32()
MOVQ 176(R11), R12
MOVBQZX 184(R11), R13
CMPQ R13, $0x20
JBE skip_fill3
MOVQ 168(R11), R14
SUBQ $0x20, R13
SUBQ $0x04, R14
MOVQ 144(R11), R15
// b.value |= uint64(low) << (b.bitsRead & 63)
MOVL (R14)(R15*1), R15
MOVQ R13, CX
SHLQ CL, R15
MOVQ R14, 168(R11)
ORQ R15, R12
// exhausted = exhausted || (br3.off < 4)
CMPQ R14, $0x04
SETLT AL
ORB AL, DL
skip_fill3:
// val0 := br3.peekTopBits(peekBits)
MOVQ R12, R14
MOVQ DI, CX
SHRQ CL, R14
// v0 := table[val0&mask]
MOVW (R10)(R14*2), CX
// br3.advance(uint8(v0.entry)
MOVB CH, AL
SHLQ CL, R12
ADDB CL, R13
// val1 := br3.peekTopBits(peekBits)
MOVQ R12, R14
MOVQ DI, CX
SHRQ CL, R14
// v1 := table[val0&mask]
MOVW (R10)(R14*2), CX
// br3.advance(uint8(v1.entry)
MOVB CH, AH
SHLQ CL, R12
ADDB CL, R13
BSWAPL AX
// val2 := br3.peekTopBits(peekBits)
MOVQ R12, R14
MOVQ DI, CX
SHRQ CL, R14
// v2 := table[val0&mask]
MOVW (R10)(R14*2), CX
// br3.advance(uint8(v2.entry)
MOVB CH, AH
SHLQ CL, R12
ADDB CL, R13
// val3 := br3.peekTopBits(peekBits)
MOVQ R12, R14
MOVQ DI, CX
SHRQ CL, R14
// v3 := table[val0&mask]
MOVW (R10)(R14*2), CX
// br3.advance(uint8(v3.entry)
MOVB CH, AL
SHLQ CL, R12
ADDB CL, R13
BSWAPL AX
// these four writes get coalesced
// out[id * dstEvery + 0] = uint8(v0.entry >> 8)
// out[id * dstEvery + 1] = uint8(v1.entry >> 8)
// out[id * dstEvery + 3] = uint8(v2.entry >> 8)
// out[id * dstEvery + 4] = uint8(v3.entry >> 8)
MOVL AX, (R8)
// update the bitreader structure
MOVQ R12, 176(R11)
MOVB R13, 184(R11)
ADDQ $0x04, BX
TESTB DL, DL
JZ main_loop
MOVQ ctx+0(FP), AX
SUBQ 16(AX), BX
SHLQ $0x02, BX
MOVQ BX, 40(AX)
RET
// func decompress1x_main_loop_amd64(ctx *decompress1xContext)
TEXT ·decompress1x_main_loop_amd64(SB), $0-8
MOVQ ctx+0(FP), CX
MOVQ 16(CX), DX
MOVQ 24(CX), BX
CMPQ BX, $0x04
JB error_max_decoded_size_exeeded
LEAQ (DX)(BX*1), BX
MOVQ (CX), SI
MOVQ (SI), R8
MOVQ 24(SI), R9
MOVQ 32(SI), R10
MOVBQZX 40(SI), R11
MOVQ 32(CX), SI
MOVBQZX 8(CX), DI
JMP loop_condition
main_loop:
// Check if we have room for 4 bytes in the output buffer
LEAQ 4(DX), CX
CMPQ CX, BX
JGE error_max_decoded_size_exeeded
// Decode 4 values
CMPQ R11, $0x20
JL bitReader_fillFast_1_end
SUBQ $0x20, R11
SUBQ $0x04, R9
MOVL (R8)(R9*1), R12
MOVQ R11, CX
SHLQ CL, R12
ORQ R12, R10
bitReader_fillFast_1_end:
MOVQ DI, CX
MOVQ R10, R12
SHRQ CL, R12
MOVW (SI)(R12*2), CX
MOVB CH, AL
MOVBQZX CL, CX
ADDQ CX, R11
SHLQ CL, R10
MOVQ DI, CX
MOVQ R10, R12
SHRQ CL, R12
MOVW (SI)(R12*2), CX
MOVB CH, AH
MOVBQZX CL, CX
ADDQ CX, R11
SHLQ CL, R10
BSWAPL AX
CMPQ R11, $0x20
JL bitReader_fillFast_2_end
SUBQ $0x20, R11
SUBQ $0x04, R9
MOVL (R8)(R9*1), R12
MOVQ R11, CX
SHLQ CL, R12
ORQ R12, R10
bitReader_fillFast_2_end:
MOVQ DI, CX
MOVQ R10, R12
SHRQ CL, R12
MOVW (SI)(R12*2), CX
MOVB CH, AH
MOVBQZX CL, CX
ADDQ CX, R11
SHLQ CL, R10
MOVQ DI, CX
MOVQ R10, R12
SHRQ CL, R12
MOVW (SI)(R12*2), CX
MOVB CH, AL
MOVBQZX CL, CX
ADDQ CX, R11
SHLQ CL, R10
BSWAPL AX
// Store the decoded values
MOVL AX, (DX)
ADDQ $0x04, DX
loop_condition:
CMPQ R9, $0x08
JGE main_loop
// Update ctx structure
MOVQ ctx+0(FP), AX
SUBQ 16(AX), DX
MOVQ DX, 40(AX)
MOVQ (AX), AX
MOVQ R9, 24(AX)
MOVQ R10, 32(AX)
MOVB R11, 40(AX)
RET
// Report error
error_max_decoded_size_exeeded:
MOVQ ctx+0(FP), AX
MOVQ $-1, CX
MOVQ CX, 40(AX)
RET
// func decompress1x_main_loop_bmi2(ctx *decompress1xContext)
// Requires: BMI2
TEXT ·decompress1x_main_loop_bmi2(SB), $0-8
MOVQ ctx+0(FP), CX
MOVQ 16(CX), DX
MOVQ 24(CX), BX
CMPQ BX, $0x04
JB error_max_decoded_size_exeeded
LEAQ (DX)(BX*1), BX
MOVQ (CX), SI
MOVQ (SI), R8
MOVQ 24(SI), R9
MOVQ 32(SI), R10
MOVBQZX 40(SI), R11
MOVQ 32(CX), SI
MOVBQZX 8(CX), DI
JMP loop_condition
main_loop:
// Check if we have room for 4 bytes in the output buffer
LEAQ 4(DX), CX
CMPQ CX, BX
JGE error_max_decoded_size_exeeded
// Decode 4 values
CMPQ R11, $0x20
JL bitReader_fillFast_1_end
SUBQ $0x20, R11
SUBQ $0x04, R9
MOVL (R8)(R9*1), CX
SHLXQ R11, CX, CX
ORQ CX, R10
bitReader_fillFast_1_end:
SHRXQ DI, R10, CX
MOVW (SI)(CX*2), CX
MOVB CH, AL
MOVBQZX CL, CX
ADDQ CX, R11
SHLXQ CX, R10, R10
SHRXQ DI, R10, CX
MOVW (SI)(CX*2), CX
MOVB CH, AH
MOVBQZX CL, CX
ADDQ CX, R11
SHLXQ CX, R10, R10
BSWAPL AX
CMPQ R11, $0x20
JL bitReader_fillFast_2_end
SUBQ $0x20, R11
SUBQ $0x04, R9
MOVL (R8)(R9*1), CX
SHLXQ R11, CX, CX
ORQ CX, R10
bitReader_fillFast_2_end:
SHRXQ DI, R10, CX
MOVW (SI)(CX*2), CX
MOVB CH, AH
MOVBQZX CL, CX
ADDQ CX, R11
SHLXQ CX, R10, R10
SHRXQ DI, R10, CX
MOVW (SI)(CX*2), CX
MOVB CH, AL
MOVBQZX CL, CX
ADDQ CX, R11
SHLXQ CX, R10, R10
BSWAPL AX
// Store the decoded values
MOVL AX, (DX)
ADDQ $0x04, DX
loop_condition:
CMPQ R9, $0x08
JGE main_loop
// Update ctx structure
MOVQ ctx+0(FP), AX
SUBQ 16(AX), DX
MOVQ DX, 40(AX)
MOVQ (AX), AX
MOVQ R9, 24(AX)
MOVQ R10, 32(AX)
MOVB R11, 40(AX)
RET
// Report error
error_max_decoded_size_exeeded:
MOVQ ctx+0(FP), AX
MOVQ $-1, CX
MOVQ CX, 40(AX)
RET