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- // Code generated by command: go run gen_fse.go -out ../fse_decoder_amd64.s -pkg=zstd. DO NOT EDIT.
- //go:build !appengine && !noasm && gc && !noasm
- // func buildDtable_asm(s *fseDecoder, ctx *buildDtableAsmContext) int
- TEXT ·buildDtable_asm(SB), $0-24
- MOVQ ctx+8(FP), CX
- MOVQ s+0(FP), DI
- // Load values
- MOVBQZX 4098(DI), DX
- XORQ AX, AX
- BTSQ DX, AX
- MOVQ (CX), BX
- MOVQ 16(CX), SI
- LEAQ -1(AX), R8
- MOVQ 8(CX), CX
- MOVWQZX 4096(DI), DI
- // End load values
- // Init, lay down lowprob symbols
- XORQ R9, R9
- JMP init_main_loop_condition
- init_main_loop:
- MOVWQSX (CX)(R9*2), R10
- CMPW R10, $-1
- JNE do_not_update_high_threshold
- MOVB R9, 1(SI)(R8*8)
- DECQ R8
- MOVQ $0x0000000000000001, R10
- do_not_update_high_threshold:
- MOVW R10, (BX)(R9*2)
- INCQ R9
- init_main_loop_condition:
- CMPQ R9, DI
- JL init_main_loop
- // Spread symbols
- // Calculate table step
- MOVQ AX, R9
- SHRQ $0x01, R9
- MOVQ AX, R10
- SHRQ $0x03, R10
- LEAQ 3(R9)(R10*1), R9
- // Fill add bits values
- LEAQ -1(AX), R10
- XORQ R11, R11
- XORQ R12, R12
- JMP spread_main_loop_condition
- spread_main_loop:
- XORQ R13, R13
- MOVWQSX (CX)(R12*2), R14
- JMP spread_inner_loop_condition
- spread_inner_loop:
- MOVB R12, 1(SI)(R11*8)
- adjust_position:
- ADDQ R9, R11
- ANDQ R10, R11
- CMPQ R11, R8
- JG adjust_position
- INCQ R13
- spread_inner_loop_condition:
- CMPQ R13, R14
- JL spread_inner_loop
- INCQ R12
- spread_main_loop_condition:
- CMPQ R12, DI
- JL spread_main_loop
- TESTQ R11, R11
- JZ spread_check_ok
- MOVQ ctx+8(FP), AX
- MOVQ R11, 24(AX)
- MOVQ $+1, ret+16(FP)
- RET
- spread_check_ok:
- // Build Decoding table
- XORQ DI, DI
- build_table_main_table:
- MOVBQZX 1(SI)(DI*8), CX
- MOVWQZX (BX)(CX*2), R8
- LEAQ 1(R8), R9
- MOVW R9, (BX)(CX*2)
- MOVQ R8, R9
- BSRQ R9, R9
- MOVQ DX, CX
- SUBQ R9, CX
- SHLQ CL, R8
- SUBQ AX, R8
- MOVB CL, (SI)(DI*8)
- MOVW R8, 2(SI)(DI*8)
- CMPQ R8, AX
- JLE build_table_check1_ok
- MOVQ ctx+8(FP), CX
- MOVQ R8, 24(CX)
- MOVQ AX, 32(CX)
- MOVQ $+2, ret+16(FP)
- RET
- build_table_check1_ok:
- TESTB CL, CL
- JNZ build_table_check2_ok
- CMPW R8, DI
- JNE build_table_check2_ok
- MOVQ ctx+8(FP), AX
- MOVQ R8, 24(AX)
- MOVQ DI, 32(AX)
- MOVQ $+3, ret+16(FP)
- RET
- build_table_check2_ok:
- INCQ DI
- CMPQ DI, AX
- JL build_table_main_table
- MOVQ $+0, ret+16(FP)
- RET
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