diff options
Diffstat (limited to 'vendor/github.com/klauspost/compress/huff0/decompress_amd64.s')
| -rw-r--r-- | vendor/github.com/klauspost/compress/huff0/decompress_amd64.s | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/vendor/github.com/klauspost/compress/huff0/decompress_amd64.s b/vendor/github.com/klauspost/compress/huff0/decompress_amd64.s index 06287f568..6c65c6e2b 100644 --- a/vendor/github.com/klauspost/compress/huff0/decompress_amd64.s +++ b/vendor/github.com/klauspost/compress/huff0/decompress_amd64.s @@ -660,3 +660,206 @@ skip_fill1003: SHLQ $0x02, DX MOVQ DX, 64(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 + MOVQ DX, CX + MOVQ 16(AX), DX + SUBQ DX, CX + MOVQ CX, 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 + MOVQ DX, CX + MOVQ 16(AX), DX + SUBQ DX, CX + MOVQ CX, 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 |