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seqdec_amd64.s
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seqdec_amd64.s
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// Code generated by command: go run gen.go -out seqdec_amd64.s -stubs delme.go -pkg=zstd. DO NOT EDIT.
//go:build !appengine && !noasm && gc && !noasm
// +build !appengine,!noasm,gc,!noasm
// func sequenceDecs_decode_amd64(s *sequenceDecs, br *bitReader, ctx *decodeAsmContext) int
// Requires: CMOV
TEXT ·sequenceDecs_decode_amd64(SB), $8-32
MOVQ br+8(FP), AX
MOVQ 32(AX), DX
MOVBQZX 40(AX), BX
MOVQ 24(AX), SI
MOVQ (AX), AX
ADDQ SI, AX
MOVQ AX, (SP)
MOVQ ctx+16(FP), AX
MOVQ 72(AX), DI
MOVQ 80(AX), R8
MOVQ 88(AX), R9
MOVQ 104(AX), R10
MOVQ s+0(FP), AX
MOVQ 144(AX), R11
MOVQ 152(AX), R12
MOVQ 160(AX), R13
sequenceDecs_decode_amd64_main_loop:
MOVQ (SP), R14
// Fill bitreader to have enough for the offset and match length.
CMPQ SI, $0x08
JL sequenceDecs_decode_amd64_fill_byte_by_byte
MOVQ BX, AX
SHRQ $0x03, AX
SUBQ AX, R14
MOVQ (R14), DX
SUBQ AX, SI
ANDQ $0x07, BX
JMP sequenceDecs_decode_amd64_fill_end
sequenceDecs_decode_amd64_fill_byte_by_byte:
CMPQ SI, $0x00
JLE sequenceDecs_decode_amd64_fill_end
CMPQ BX, $0x07
JLE sequenceDecs_decode_amd64_fill_end
SHLQ $0x08, DX
SUBQ $0x01, R14
SUBQ $0x01, SI
SUBQ $0x08, BX
MOVBQZX (R14), AX
ORQ AX, DX
JMP sequenceDecs_decode_amd64_fill_byte_by_byte
sequenceDecs_decode_amd64_fill_end:
// Update offset
MOVQ R9, AX
MOVQ BX, CX
MOVQ DX, R15
SHLQ CL, R15
MOVB AH, CL
ADDQ CX, BX
NEGL CX
SHRQ CL, R15
SHRQ $0x20, AX
TESTQ CX, CX
CMOVQEQ CX, R15
ADDQ R15, AX
MOVQ AX, 16(R10)
// Update match length
MOVQ R8, AX
MOVQ BX, CX
MOVQ DX, R15
SHLQ CL, R15
MOVB AH, CL
ADDQ CX, BX
NEGL CX
SHRQ CL, R15
SHRQ $0x20, AX
TESTQ CX, CX
CMOVQEQ CX, R15
ADDQ R15, AX
MOVQ AX, 8(R10)
// Fill bitreader to have enough for the remaining
CMPQ SI, $0x08
JL sequenceDecs_decode_amd64_fill_2_byte_by_byte
MOVQ BX, AX
SHRQ $0x03, AX
SUBQ AX, R14
MOVQ (R14), DX
SUBQ AX, SI
ANDQ $0x07, BX
JMP sequenceDecs_decode_amd64_fill_2_end
sequenceDecs_decode_amd64_fill_2_byte_by_byte:
CMPQ SI, $0x00
JLE sequenceDecs_decode_amd64_fill_2_end
CMPQ BX, $0x07
JLE sequenceDecs_decode_amd64_fill_2_end
SHLQ $0x08, DX
SUBQ $0x01, R14
SUBQ $0x01, SI
SUBQ $0x08, BX
MOVBQZX (R14), AX
ORQ AX, DX
JMP sequenceDecs_decode_amd64_fill_2_byte_by_byte
sequenceDecs_decode_amd64_fill_2_end:
// Update literal length
MOVQ DI, AX
MOVQ BX, CX
MOVQ DX, R15
SHLQ CL, R15
MOVB AH, CL
ADDQ CX, BX
NEGL CX
SHRQ CL, R15
SHRQ $0x20, AX
TESTQ CX, CX
CMOVQEQ CX, R15
ADDQ R15, AX
MOVQ AX, (R10)
// Fill bitreader for state updates
MOVQ R14, (SP)
MOVQ R9, AX
SHRQ $0x08, AX
MOVBQZX AL, AX
MOVQ ctx+16(FP), CX
CMPQ 96(CX), $0x00
JZ sequenceDecs_decode_amd64_skip_update
// Update Literal Length State
MOVBQZX DI, R14
SHRQ $0x10, DI
MOVWQZX DI, DI
CMPQ R14, $0x00
JZ sequenceDecs_decode_amd64_llState_updateState_skip_zero
MOVQ BX, CX
ADDQ R14, BX
MOVQ DX, R15
SHLQ CL, R15
MOVQ R14, CX
NEGQ CX
SHRQ CL, R15
ADDQ R15, DI
sequenceDecs_decode_amd64_llState_updateState_skip_zero:
// Load ctx.llTable
MOVQ ctx+16(FP), CX
MOVQ (CX), CX
MOVQ (CX)(DI*8), DI
// Update Match Length State
MOVBQZX R8, R14
SHRQ $0x10, R8
MOVWQZX R8, R8
CMPQ R14, $0x00
JZ sequenceDecs_decode_amd64_mlState_updateState_skip_zero
MOVQ BX, CX
ADDQ R14, BX
MOVQ DX, R15
SHLQ CL, R15
MOVQ R14, CX
NEGQ CX
SHRQ CL, R15
ADDQ R15, R8
sequenceDecs_decode_amd64_mlState_updateState_skip_zero:
// Load ctx.mlTable
MOVQ ctx+16(FP), CX
MOVQ 24(CX), CX
MOVQ (CX)(R8*8), R8
// Update Offset State
MOVBQZX R9, R14
SHRQ $0x10, R9
MOVWQZX R9, R9
CMPQ R14, $0x00
JZ sequenceDecs_decode_amd64_ofState_updateState_skip_zero
MOVQ BX, CX
ADDQ R14, BX
MOVQ DX, R15
SHLQ CL, R15
MOVQ R14, CX
NEGQ CX
SHRQ CL, R15
ADDQ R15, R9
sequenceDecs_decode_amd64_ofState_updateState_skip_zero:
// Load ctx.ofTable
MOVQ ctx+16(FP), CX
MOVQ 48(CX), CX
MOVQ (CX)(R9*8), R9
sequenceDecs_decode_amd64_skip_update:
// Adjust offset
MOVQ 16(R10), CX
CMPQ AX, $0x01
JBE sequenceDecs_decode_amd64_adjust_offsetB_1_or_0
MOVQ R12, R13
MOVQ R11, R12
MOVQ CX, R11
JMP sequenceDecs_decode_amd64_adjust_end
sequenceDecs_decode_amd64_adjust_offsetB_1_or_0:
CMPQ (R10), $0x00000000
JNE sequenceDecs_decode_amd64_adjust_offset_maybezero
INCQ CX
JMP sequenceDecs_decode_amd64_adjust_offset_nonzero
sequenceDecs_decode_amd64_adjust_offset_maybezero:
TESTQ CX, CX
JNZ sequenceDecs_decode_amd64_adjust_offset_nonzero
MOVQ R11, CX
JMP sequenceDecs_decode_amd64_adjust_end
sequenceDecs_decode_amd64_adjust_offset_nonzero:
CMPQ CX, $0x01
JB sequenceDecs_decode_amd64_adjust_zero
JEQ sequenceDecs_decode_amd64_adjust_one
CMPQ CX, $0x02
JA sequenceDecs_decode_amd64_adjust_three
JMP sequenceDecs_decode_amd64_adjust_two
sequenceDecs_decode_amd64_adjust_zero:
MOVQ R11, AX
JMP sequenceDecs_decode_amd64_adjust_test_temp_valid
sequenceDecs_decode_amd64_adjust_one:
MOVQ R12, AX
JMP sequenceDecs_decode_amd64_adjust_test_temp_valid
sequenceDecs_decode_amd64_adjust_two:
MOVQ R13, AX
JMP sequenceDecs_decode_amd64_adjust_test_temp_valid
sequenceDecs_decode_amd64_adjust_three:
LEAQ -1(R11), AX
sequenceDecs_decode_amd64_adjust_test_temp_valid:
TESTQ AX, AX
JNZ sequenceDecs_decode_amd64_adjust_temp_valid
MOVQ $0x00000001, AX
sequenceDecs_decode_amd64_adjust_temp_valid:
CMPQ CX, $0x01
CMOVQNE R12, R13
MOVQ R11, R12
MOVQ AX, R11
MOVQ AX, CX
sequenceDecs_decode_amd64_adjust_end:
MOVQ CX, 16(R10)
// Check values
MOVQ 8(R10), AX
MOVQ (R10), R14
LEAQ (AX)(R14*1), R15
MOVQ s+0(FP), BP
ADDQ R15, 256(BP)
MOVQ ctx+16(FP), R15
SUBQ R14, 128(R15)
JS error_not_enough_literals
CMPQ AX, $0x00020002
JA sequenceDecs_decode_amd64_error_match_len_too_big
TESTQ CX, CX
JNZ sequenceDecs_decode_amd64_match_len_ofs_ok
TESTQ AX, AX
JNZ sequenceDecs_decode_amd64_error_match_len_ofs_mismatch
sequenceDecs_decode_amd64_match_len_ofs_ok:
ADDQ $0x18, R10
MOVQ ctx+16(FP), AX
DECQ 96(AX)
JNS sequenceDecs_decode_amd64_main_loop
MOVQ s+0(FP), AX
MOVQ R11, 144(AX)
MOVQ R12, 152(AX)
MOVQ R13, 160(AX)
MOVQ br+8(FP), AX
MOVQ DX, 32(AX)
MOVB BL, 40(AX)
MOVQ SI, 24(AX)
// Return success
MOVQ $0x00000000, ret+24(FP)
RET
// Return with match length error
sequenceDecs_decode_amd64_error_match_len_ofs_mismatch:
MOVQ $0x00000001, ret+24(FP)
RET
// Return with match too long error
sequenceDecs_decode_amd64_error_match_len_too_big:
MOVQ $0x00000002, ret+24(FP)
RET
// Return with match offset too long error
MOVQ $0x00000003, ret+24(FP)
RET
// Return with not enough literals error
error_not_enough_literals:
MOVQ $0x00000004, ret+24(FP)
RET
// Return with not enough output space error
MOVQ $0x00000005, ret+24(FP)
RET
// func sequenceDecs_decode_56_amd64(s *sequenceDecs, br *bitReader, ctx *decodeAsmContext) int
// Requires: CMOV
TEXT ·sequenceDecs_decode_56_amd64(SB), $8-32
MOVQ br+8(FP), AX
MOVQ 32(AX), DX
MOVBQZX 40(AX), BX
MOVQ 24(AX), SI
MOVQ (AX), AX
ADDQ SI, AX
MOVQ AX, (SP)
MOVQ ctx+16(FP), AX
MOVQ 72(AX), DI
MOVQ 80(AX), R8
MOVQ 88(AX), R9
MOVQ 104(AX), R10
MOVQ s+0(FP), AX
MOVQ 144(AX), R11
MOVQ 152(AX), R12
MOVQ 160(AX), R13
sequenceDecs_decode_56_amd64_main_loop:
MOVQ (SP), R14
// Fill bitreader to have enough for the offset and match length.
CMPQ SI, $0x08
JL sequenceDecs_decode_56_amd64_fill_byte_by_byte
MOVQ BX, AX
SHRQ $0x03, AX
SUBQ AX, R14
MOVQ (R14), DX
SUBQ AX, SI
ANDQ $0x07, BX
JMP sequenceDecs_decode_56_amd64_fill_end
sequenceDecs_decode_56_amd64_fill_byte_by_byte:
CMPQ SI, $0x00
JLE sequenceDecs_decode_56_amd64_fill_end
CMPQ BX, $0x07
JLE sequenceDecs_decode_56_amd64_fill_end
SHLQ $0x08, DX
SUBQ $0x01, R14
SUBQ $0x01, SI
SUBQ $0x08, BX
MOVBQZX (R14), AX
ORQ AX, DX
JMP sequenceDecs_decode_56_amd64_fill_byte_by_byte
sequenceDecs_decode_56_amd64_fill_end:
// Update offset
MOVQ R9, AX
MOVQ BX, CX
MOVQ DX, R15
SHLQ CL, R15
MOVB AH, CL
ADDQ CX, BX
NEGL CX
SHRQ CL, R15
SHRQ $0x20, AX
TESTQ CX, CX
CMOVQEQ CX, R15
ADDQ R15, AX
MOVQ AX, 16(R10)
// Update match length
MOVQ R8, AX
MOVQ BX, CX
MOVQ DX, R15
SHLQ CL, R15
MOVB AH, CL
ADDQ CX, BX
NEGL CX
SHRQ CL, R15
SHRQ $0x20, AX
TESTQ CX, CX
CMOVQEQ CX, R15
ADDQ R15, AX
MOVQ AX, 8(R10)
// Update literal length
MOVQ DI, AX
MOVQ BX, CX
MOVQ DX, R15
SHLQ CL, R15
MOVB AH, CL
ADDQ CX, BX
NEGL CX
SHRQ CL, R15
SHRQ $0x20, AX
TESTQ CX, CX
CMOVQEQ CX, R15
ADDQ R15, AX
MOVQ AX, (R10)
// Fill bitreader for state updates
MOVQ R14, (SP)
MOVQ R9, AX
SHRQ $0x08, AX
MOVBQZX AL, AX
MOVQ ctx+16(FP), CX
CMPQ 96(CX), $0x00
JZ sequenceDecs_decode_56_amd64_skip_update
// Update Literal Length State
MOVBQZX DI, R14
SHRQ $0x10, DI
MOVWQZX DI, DI
CMPQ R14, $0x00
JZ sequenceDecs_decode_56_amd64_llState_updateState_skip_zero
MOVQ BX, CX
ADDQ R14, BX
MOVQ DX, R15
SHLQ CL, R15
MOVQ R14, CX
NEGQ CX
SHRQ CL, R15
ADDQ R15, DI
sequenceDecs_decode_56_amd64_llState_updateState_skip_zero:
// Load ctx.llTable
MOVQ ctx+16(FP), CX
MOVQ (CX), CX
MOVQ (CX)(DI*8), DI
// Update Match Length State
MOVBQZX R8, R14
SHRQ $0x10, R8
MOVWQZX R8, R8
CMPQ R14, $0x00
JZ sequenceDecs_decode_56_amd64_mlState_updateState_skip_zero
MOVQ BX, CX
ADDQ R14, BX
MOVQ DX, R15
SHLQ CL, R15
MOVQ R14, CX
NEGQ CX
SHRQ CL, R15
ADDQ R15, R8
sequenceDecs_decode_56_amd64_mlState_updateState_skip_zero:
// Load ctx.mlTable
MOVQ ctx+16(FP), CX
MOVQ 24(CX), CX
MOVQ (CX)(R8*8), R8
// Update Offset State
MOVBQZX R9, R14
SHRQ $0x10, R9
MOVWQZX R9, R9
CMPQ R14, $0x00
JZ sequenceDecs_decode_56_amd64_ofState_updateState_skip_zero
MOVQ BX, CX
ADDQ R14, BX
MOVQ DX, R15
SHLQ CL, R15
MOVQ R14, CX
NEGQ CX
SHRQ CL, R15
ADDQ R15, R9
sequenceDecs_decode_56_amd64_ofState_updateState_skip_zero:
// Load ctx.ofTable
MOVQ ctx+16(FP), CX
MOVQ 48(CX), CX
MOVQ (CX)(R9*8), R9
sequenceDecs_decode_56_amd64_skip_update:
// Adjust offset
MOVQ 16(R10), CX
CMPQ AX, $0x01
JBE sequenceDecs_decode_56_amd64_adjust_offsetB_1_or_0
MOVQ R12, R13
MOVQ R11, R12
MOVQ CX, R11
JMP sequenceDecs_decode_56_amd64_adjust_end
sequenceDecs_decode_56_amd64_adjust_offsetB_1_or_0:
CMPQ (R10), $0x00000000
JNE sequenceDecs_decode_56_amd64_adjust_offset_maybezero
INCQ CX
JMP sequenceDecs_decode_56_amd64_adjust_offset_nonzero
sequenceDecs_decode_56_amd64_adjust_offset_maybezero:
TESTQ CX, CX
JNZ sequenceDecs_decode_56_amd64_adjust_offset_nonzero
MOVQ R11, CX
JMP sequenceDecs_decode_56_amd64_adjust_end
sequenceDecs_decode_56_amd64_adjust_offset_nonzero:
CMPQ CX, $0x01
JB sequenceDecs_decode_56_amd64_adjust_zero
JEQ sequenceDecs_decode_56_amd64_adjust_one
CMPQ CX, $0x02
JA sequenceDecs_decode_56_amd64_adjust_three
JMP sequenceDecs_decode_56_amd64_adjust_two
sequenceDecs_decode_56_amd64_adjust_zero:
MOVQ R11, AX
JMP sequenceDecs_decode_56_amd64_adjust_test_temp_valid
sequenceDecs_decode_56_amd64_adjust_one:
MOVQ R12, AX
JMP sequenceDecs_decode_56_amd64_adjust_test_temp_valid
sequenceDecs_decode_56_amd64_adjust_two:
MOVQ R13, AX
JMP sequenceDecs_decode_56_amd64_adjust_test_temp_valid
sequenceDecs_decode_56_amd64_adjust_three:
LEAQ -1(R11), AX
sequenceDecs_decode_56_amd64_adjust_test_temp_valid:
TESTQ AX, AX
JNZ sequenceDecs_decode_56_amd64_adjust_temp_valid
MOVQ $0x00000001, AX
sequenceDecs_decode_56_amd64_adjust_temp_valid:
CMPQ CX, $0x01
CMOVQNE R12, R13
MOVQ R11, R12
MOVQ AX, R11
MOVQ AX, CX
sequenceDecs_decode_56_amd64_adjust_end:
MOVQ CX, 16(R10)
// Check values
MOVQ 8(R10), AX
MOVQ (R10), R14
LEAQ (AX)(R14*1), R15
MOVQ s+0(FP), BP
ADDQ R15, 256(BP)
MOVQ ctx+16(FP), R15
SUBQ R14, 128(R15)
JS error_not_enough_literals
CMPQ AX, $0x00020002
JA sequenceDecs_decode_56_amd64_error_match_len_too_big
TESTQ CX, CX
JNZ sequenceDecs_decode_56_amd64_match_len_ofs_ok
TESTQ AX, AX
JNZ sequenceDecs_decode_56_amd64_error_match_len_ofs_mismatch
sequenceDecs_decode_56_amd64_match_len_ofs_ok:
ADDQ $0x18, R10
MOVQ ctx+16(FP), AX
DECQ 96(AX)
JNS sequenceDecs_decode_56_amd64_main_loop
MOVQ s+0(FP), AX
MOVQ R11, 144(AX)
MOVQ R12, 152(AX)
MOVQ R13, 160(AX)
MOVQ br+8(FP), AX
MOVQ DX, 32(AX)
MOVB BL, 40(AX)
MOVQ SI, 24(AX)
// Return success
MOVQ $0x00000000, ret+24(FP)
RET
// Return with match length error
sequenceDecs_decode_56_amd64_error_match_len_ofs_mismatch:
MOVQ $0x00000001, ret+24(FP)
RET
// Return with match too long error
sequenceDecs_decode_56_amd64_error_match_len_too_big:
MOVQ $0x00000002, ret+24(FP)
RET
// Return with match offset too long error
MOVQ $0x00000003, ret+24(FP)
RET
// Return with not enough literals error
error_not_enough_literals:
MOVQ $0x00000004, ret+24(FP)
RET
// Return with not enough output space error
MOVQ $0x00000005, ret+24(FP)
RET
// func sequenceDecs_decode_bmi2(s *sequenceDecs, br *bitReader, ctx *decodeAsmContext) int
// Requires: BMI, BMI2, CMOV
TEXT ·sequenceDecs_decode_bmi2(SB), $8-32
MOVQ br+8(FP), CX
MOVQ 32(CX), AX
MOVBQZX 40(CX), DX
MOVQ 24(CX), BX
MOVQ (CX), CX
ADDQ BX, CX
MOVQ CX, (SP)
MOVQ ctx+16(FP), CX
MOVQ 72(CX), SI
MOVQ 80(CX), DI
MOVQ 88(CX), R8
MOVQ 104(CX), R9
MOVQ s+0(FP), CX
MOVQ 144(CX), R10
MOVQ 152(CX), R11
MOVQ 160(CX), R12
sequenceDecs_decode_bmi2_main_loop:
MOVQ (SP), R13
// Fill bitreader to have enough for the offset and match length.
CMPQ BX, $0x08
JL sequenceDecs_decode_bmi2_fill_byte_by_byte
MOVQ DX, CX
SHRQ $0x03, CX
SUBQ CX, R13
MOVQ (R13), AX
SUBQ CX, BX
ANDQ $0x07, DX
JMP sequenceDecs_decode_bmi2_fill_end
sequenceDecs_decode_bmi2_fill_byte_by_byte:
CMPQ BX, $0x00
JLE sequenceDecs_decode_bmi2_fill_end
CMPQ DX, $0x07
JLE sequenceDecs_decode_bmi2_fill_end
SHLQ $0x08, AX
SUBQ $0x01, R13
SUBQ $0x01, BX
SUBQ $0x08, DX
MOVBQZX (R13), CX
ORQ CX, AX
JMP sequenceDecs_decode_bmi2_fill_byte_by_byte
sequenceDecs_decode_bmi2_fill_end:
// Update offset
MOVQ $0x00000808, CX
BEXTRQ CX, R8, R14
MOVQ AX, R15
LEAQ (DX)(R14*1), CX
ROLQ CL, R15
BZHIQ R14, R15, R15
MOVQ CX, DX
MOVQ R8, CX
SHRQ $0x20, CX
ADDQ R15, CX
MOVQ CX, 16(R9)
// Update match length
MOVQ $0x00000808, CX
BEXTRQ CX, DI, R14
MOVQ AX, R15
LEAQ (DX)(R14*1), CX
ROLQ CL, R15
BZHIQ R14, R15, R15
MOVQ CX, DX
MOVQ DI, CX
SHRQ $0x20, CX
ADDQ R15, CX
MOVQ CX, 8(R9)
// Fill bitreader to have enough for the remaining
CMPQ BX, $0x08
JL sequenceDecs_decode_bmi2_fill_2_byte_by_byte
MOVQ DX, CX
SHRQ $0x03, CX
SUBQ CX, R13
MOVQ (R13), AX
SUBQ CX, BX
ANDQ $0x07, DX
JMP sequenceDecs_decode_bmi2_fill_2_end
sequenceDecs_decode_bmi2_fill_2_byte_by_byte:
CMPQ BX, $0x00
JLE sequenceDecs_decode_bmi2_fill_2_end
CMPQ DX, $0x07
JLE sequenceDecs_decode_bmi2_fill_2_end
SHLQ $0x08, AX
SUBQ $0x01, R13
SUBQ $0x01, BX
SUBQ $0x08, DX
MOVBQZX (R13), CX
ORQ CX, AX
JMP sequenceDecs_decode_bmi2_fill_2_byte_by_byte
sequenceDecs_decode_bmi2_fill_2_end:
// Update literal length
MOVQ $0x00000808, CX
BEXTRQ CX, SI, R14
MOVQ AX, R15
LEAQ (DX)(R14*1), CX
ROLQ CL, R15
BZHIQ R14, R15, R15
MOVQ CX, DX
MOVQ SI, CX
SHRQ $0x20, CX
ADDQ R15, CX
MOVQ CX, (R9)
// Fill bitreader for state updates
MOVQ R13, (SP)
MOVQ $0x00000808, CX
BEXTRQ CX, R8, R13
MOVQ ctx+16(FP), CX
CMPQ 96(CX), $0x00
JZ sequenceDecs_decode_bmi2_skip_update
// Update Literal Length State
MOVBQZX SI, R14
MOVQ $0x00001010, CX
BEXTRQ CX, SI, SI
LEAQ (DX)(R14*1), CX
MOVQ AX, R15
MOVQ CX, DX
ROLQ CL, R15
BZHIQ R14, R15, R15
ADDQ R15, SI
// Load ctx.llTable
MOVQ ctx+16(FP), CX
MOVQ (CX), CX
MOVQ (CX)(SI*8), SI
// Update Match Length State
MOVBQZX DI, R14
MOVQ $0x00001010, CX
BEXTRQ CX, DI, DI
LEAQ (DX)(R14*1), CX
MOVQ AX, R15
MOVQ CX, DX
ROLQ CL, R15
BZHIQ R14, R15, R15
ADDQ R15, DI
// Load ctx.mlTable
MOVQ ctx+16(FP), CX
MOVQ 24(CX), CX
MOVQ (CX)(DI*8), DI
// Update Offset State
MOVBQZX R8, R14
MOVQ $0x00001010, CX
BEXTRQ CX, R8, R8
LEAQ (DX)(R14*1), CX
MOVQ AX, R15
MOVQ CX, DX
ROLQ CL, R15
BZHIQ R14, R15, R15
ADDQ R15, R8
// Load ctx.ofTable
MOVQ ctx+16(FP), CX
MOVQ 48(CX), CX
MOVQ (CX)(R8*8), R8
sequenceDecs_decode_bmi2_skip_update:
// Adjust offset
MOVQ 16(R9), CX
CMPQ R13, $0x01
JBE sequenceDecs_decode_bmi2_adjust_offsetB_1_or_0
MOVQ R11, R12
MOVQ R10, R11
MOVQ CX, R10
JMP sequenceDecs_decode_bmi2_adjust_end
sequenceDecs_decode_bmi2_adjust_offsetB_1_or_0:
CMPQ (R9), $0x00000000
JNE sequenceDecs_decode_bmi2_adjust_offset_maybezero
INCQ CX
JMP sequenceDecs_decode_bmi2_adjust_offset_nonzero
sequenceDecs_decode_bmi2_adjust_offset_maybezero:
TESTQ CX, CX
JNZ sequenceDecs_decode_bmi2_adjust_offset_nonzero
MOVQ R10, CX
JMP sequenceDecs_decode_bmi2_adjust_end
sequenceDecs_decode_bmi2_adjust_offset_nonzero:
CMPQ CX, $0x01
JB sequenceDecs_decode_bmi2_adjust_zero
JEQ sequenceDecs_decode_bmi2_adjust_one
CMPQ CX, $0x02
JA sequenceDecs_decode_bmi2_adjust_three
JMP sequenceDecs_decode_bmi2_adjust_two
sequenceDecs_decode_bmi2_adjust_zero:
MOVQ R10, R13
JMP sequenceDecs_decode_bmi2_adjust_test_temp_valid
sequenceDecs_decode_bmi2_adjust_one:
MOVQ R11, R13
JMP sequenceDecs_decode_bmi2_adjust_test_temp_valid
sequenceDecs_decode_bmi2_adjust_two:
MOVQ R12, R13
JMP sequenceDecs_decode_bmi2_adjust_test_temp_valid
sequenceDecs_decode_bmi2_adjust_three:
LEAQ -1(R10), R13
sequenceDecs_decode_bmi2_adjust_test_temp_valid:
TESTQ R13, R13
JNZ sequenceDecs_decode_bmi2_adjust_temp_valid
MOVQ $0x00000001, R13
sequenceDecs_decode_bmi2_adjust_temp_valid:
CMPQ CX, $0x01
CMOVQNE R11, R12
MOVQ R10, R11
MOVQ R13, R10
MOVQ R13, CX
sequenceDecs_decode_bmi2_adjust_end:
MOVQ CX, 16(R9)
// Check values
MOVQ 8(R9), R13
MOVQ (R9), R14
LEAQ (R13)(R14*1), R15
MOVQ s+0(FP), BP
ADDQ R15, 256(BP)
MOVQ ctx+16(FP), R15
SUBQ R14, 128(R15)
JS error_not_enough_literals
CMPQ R13, $0x00020002
JA sequenceDecs_decode_bmi2_error_match_len_too_big
TESTQ CX, CX
JNZ sequenceDecs_decode_bmi2_match_len_ofs_ok
TESTQ R13, R13
JNZ sequenceDecs_decode_bmi2_error_match_len_ofs_mismatch
sequenceDecs_decode_bmi2_match_len_ofs_ok:
ADDQ $0x18, R9
MOVQ ctx+16(FP), CX
DECQ 96(CX)
JNS sequenceDecs_decode_bmi2_main_loop
MOVQ s+0(FP), CX
MOVQ R10, 144(CX)
MOVQ R11, 152(CX)
MOVQ R12, 160(CX)
MOVQ br+8(FP), CX
MOVQ AX, 32(CX)
MOVB DL, 40(CX)
MOVQ BX, 24(CX)
// Return success
MOVQ $0x00000000, ret+24(FP)
RET
// Return with match length error
sequenceDecs_decode_bmi2_error_match_len_ofs_mismatch:
MOVQ $0x00000001, ret+24(FP)
RET
// Return with match too long error
sequenceDecs_decode_bmi2_error_match_len_too_big:
MOVQ $0x00000002, ret+24(FP)
RET
// Return with match offset too long error
MOVQ $0x00000003, ret+24(FP)
RET
// Return with not enough literals error
error_not_enough_literals:
MOVQ $0x00000004, ret+24(FP)
RET
// Return with not enough output space error
MOVQ $0x00000005, ret+24(FP)
RET
// func sequenceDecs_decode_56_bmi2(s *sequenceDecs, br *bitReader, ctx *decodeAsmContext) int
// Requires: BMI, BMI2, CMOV
TEXT ·sequenceDecs_decode_56_bmi2(SB), $8-32
MOVQ br+8(FP), CX
MOVQ 32(CX), AX
MOVBQZX 40(CX), DX
MOVQ 24(CX), BX
MOVQ (CX), CX
ADDQ BX, CX
MOVQ CX, (SP)
MOVQ ctx+16(FP), CX
MOVQ 72(CX), SI
MOVQ 80(CX), DI
MOVQ 88(CX), R8
MOVQ 104(CX), R9
MOVQ s+0(FP), CX
MOVQ 144(CX), R10
MOVQ 152(CX), R11
MOVQ 160(CX), R12
sequenceDecs_decode_56_bmi2_main_loop:
MOVQ (SP), R13
// Fill bitreader to have enough for the offset and match length.
CMPQ BX, $0x08
JL sequenceDecs_decode_56_bmi2_fill_byte_by_byte
MOVQ DX, CX
SHRQ $0x03, CX
SUBQ CX, R13
MOVQ (R13), AX
SUBQ CX, BX
ANDQ $0x07, DX
JMP sequenceDecs_decode_56_bmi2_fill_end
sequenceDecs_decode_56_bmi2_fill_byte_by_byte:
CMPQ BX, $0x00
JLE sequenceDecs_decode_56_bmi2_fill_end
CMPQ DX, $0x07
JLE sequenceDecs_decode_56_bmi2_fill_end
SHLQ $0x08, AX
SUBQ $0x01, R13
SUBQ $0x01, BX
SUBQ $0x08, DX
MOVBQZX (R13), CX
ORQ CX, AX
JMP sequenceDecs_decode_56_bmi2_fill_byte_by_byte
sequenceDecs_decode_56_bmi2_fill_end:
// Update offset
MOVQ $0x00000808, CX
BEXTRQ CX, R8, R14
MOVQ AX, R15
LEAQ (DX)(R14*1), CX
ROLQ CL, R15
BZHIQ R14, R15, R15
MOVQ CX, DX
MOVQ R8, CX
SHRQ $0x20, CX
ADDQ R15, CX
MOVQ CX, 16(R9)
// Update match length
MOVQ $0x00000808, CX
BEXTRQ CX, DI, R14
MOVQ AX, R15
LEAQ (DX)(R14*1), CX
ROLQ CL, R15
BZHIQ R14, R15, R15
MOVQ CX, DX
MOVQ DI, CX
SHRQ $0x20, CX
ADDQ R15, CX
MOVQ CX, 8(R9)
// Update literal length
MOVQ $0x00000808, CX
BEXTRQ CX, SI, R14
MOVQ AX, R15
LEAQ (DX)(R14*1), CX
ROLQ CL, R15
BZHIQ R14, R15, R15
MOVQ CX, DX
MOVQ SI, CX
SHRQ $0x20, CX
ADDQ R15, CX
MOVQ CX, (R9)
// Fill bitreader for state updates
MOVQ R13, (SP)
MOVQ $0x00000808, CX
BEXTRQ CX, R8, R13
MOVQ ctx+16(FP), CX
CMPQ 96(CX), $0x00
JZ sequenceDecs_decode_56_bmi2_skip_update
// Update Literal Length State
MOVBQZX SI, R14
MOVQ $0x00001010, CX
BEXTRQ CX, SI, SI
LEAQ (DX)(R14*1), CX
MOVQ AX, R15
MOVQ CX, DX
ROLQ CL, R15
BZHIQ R14, R15, R15
ADDQ R15, SI
// Load ctx.llTable
MOVQ ctx+16(FP), CX
MOVQ (CX), CX
MOVQ (CX)(SI*8), SI
// Update Match Length State
MOVBQZX DI, R14
MOVQ $0x00001010, CX
BEXTRQ CX, DI, DI
LEAQ (DX)(R14*1), CX
MOVQ AX, R15
MOVQ CX, DX
ROLQ CL, R15
BZHIQ R14, R15, R15
ADDQ R15, DI