diff options
Diffstat (limited to '')
| -rw-r--r-- | other-licenses/7zstub/src/Asm/x86/XzCrc64Opt.asm | 205 |
1 files changed, 205 insertions, 0 deletions
diff --git a/other-licenses/7zstub/src/Asm/x86/XzCrc64Opt.asm b/other-licenses/7zstub/src/Asm/x86/XzCrc64Opt.asm new file mode 100644 index 0000000000..3e6d490266 --- /dev/null +++ b/other-licenses/7zstub/src/Asm/x86/XzCrc64Opt.asm @@ -0,0 +1,205 @@ +; XzCrc64Opt.asm -- CRC64 calculation : optimized version
+; 2011-06-28 : Igor Pavlov : Public domain
+
+include 7zAsm.asm
+
+MY_ASM_START
+
+ifdef x64
+
+ rD equ r9
+ rN equ r10
+
+ num_VAR equ r8
+ table_VAR equ r9
+
+ SRCDAT equ rN + rD
+
+CRC_XOR macro dest:req, src:req, t:req
+ xor dest, QWORD PTR [r5 + src * 8 + 0800h * t]
+endm
+
+CRC1b macro
+ movzx x6, BYTE PTR [rD]
+ inc rD
+ movzx x3, x0_L
+ xor x6, x3
+ shr r0, 8
+ CRC_XOR r0, r6, 0
+ dec rN
+endm
+
+MY_PROLOG macro crc_end:req
+ MY_PUSH_4_REGS
+
+ mov r0, r1
+ mov rN, num_VAR
+ mov r5, table_VAR
+ mov rD, r2
+ test rN, rN
+ jz crc_end
+ @@:
+ test rD, 3
+ jz @F
+ CRC1b
+ jnz @B
+ @@:
+ cmp rN, 8
+ jb crc_end
+ add rN, rD
+ mov num_VAR, rN
+ sub rN, 4
+ and rN, NOT 3
+ sub rD, rN
+ mov x1, [SRCDAT]
+ xor r0, r1
+ add rN, 4
+endm
+
+MY_EPILOG macro crc_end:req
+ sub rN, 4
+ mov x1, [SRCDAT]
+ xor r0, r1
+ mov rD, rN
+ mov rN, num_VAR
+ sub rN, rD
+ crc_end:
+ test rN, rN
+ jz @F
+ CRC1b
+ jmp crc_end
+ @@:
+ MY_POP_4_REGS
+endm
+
+MY_PROC XzCrc64UpdateT4, 4
+ MY_PROLOG crc_end_4
+ align 16
+ main_loop_4:
+ mov x1, [SRCDAT]
+ movzx x2, x0_L
+ movzx x3, x0_H
+ shr r0, 16
+ movzx x6, x0_L
+ movzx x7, x0_H
+ shr r0, 16
+ CRC_XOR r1, r2, 3
+ CRC_XOR r0, r3, 2
+ CRC_XOR r1, r6, 1
+ CRC_XOR r0, r7, 0
+ xor r0, r1
+
+ add rD, 4
+ jnz main_loop_4
+
+ MY_EPILOG crc_end_4
+MY_ENDP
+
+else
+
+ rD equ r1
+ rN equ r7
+
+ crc_val equ (REG_SIZE * 5)
+ crc_table equ (8 + crc_val)
+ table_VAR equ [r4 + crc_table]
+ num_VAR equ table_VAR
+
+
+ SRCDAT equ rN + rD
+
+CRC macro op0:req, op1:req, dest0:req, dest1:req, src:req, t:req
+ op0 dest0, DWORD PTR [r5 + src * 8 + 0800h * t]
+ op1 dest1, DWORD PTR [r5 + src * 8 + 0800h * t + 4]
+endm
+
+CRC_XOR macro dest0:req, dest1:req, src:req, t:req
+ CRC xor, xor, dest0, dest1, src, t
+endm
+
+
+CRC1b macro
+ movzx x6, BYTE PTR [rD]
+ inc rD
+ movzx x3, x0_L
+ xor x6, x3
+ shrd r0, r2, 8
+ shr r2, 8
+ CRC_XOR r0, r2, r6, 0
+ dec rN
+endm
+
+MY_PROLOG macro crc_end:req
+ MY_PUSH_4_REGS
+
+ mov rN, r2
+
+ mov x0, [r4 + crc_val]
+ mov x2, [r4 + crc_val + 4]
+ mov r5, table_VAR
+ test rN, rN
+ jz crc_end
+ @@:
+ test rD, 3
+ jz @F
+ CRC1b
+ jnz @B
+ @@:
+ cmp rN, 8
+ jb crc_end
+ add rN, rD
+
+ mov num_VAR, rN
+
+ sub rN, 4
+ and rN, NOT 3
+ sub rD, rN
+ xor r0, [SRCDAT]
+ add rN, 4
+endm
+
+MY_EPILOG macro crc_end:req
+ sub rN, 4
+ xor r0, [SRCDAT]
+
+ mov rD, rN
+ mov rN, num_VAR
+ sub rN, rD
+ crc_end:
+ test rN, rN
+ jz @F
+ CRC1b
+ jmp crc_end
+ @@:
+ MY_POP_4_REGS
+endm
+
+MY_PROC XzCrc64UpdateT4, 5
+ MY_PROLOG crc_end_4
+ movzx x6, x0_L
+ align 16
+ main_loop_4:
+ mov r3, [SRCDAT]
+ xor r3, r2
+
+ CRC xor, mov, r3, r2, r6, 3
+ movzx x6, x0_H
+ shr r0, 16
+ CRC_XOR r3, r2, r6, 2
+
+ movzx x6, x0_L
+ movzx x0, x0_H
+ CRC_XOR r3, r2, r6, 1
+ CRC_XOR r3, r2, r0, 0
+ movzx x6, x3_L
+ mov r0, r3
+
+ add rD, 4
+ jnz main_loop_4
+
+ MY_EPILOG crc_end_4
+MY_ENDP
+
+endif
+
+end
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