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|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; Copyright(c) 2011-2016 Intel Corporation All rights reserved.
;
; Redistribution and use in source and binary forms, with or without
; modification, are permitted provided that the following conditions
; are met:
; * Redistributions of source code must retain the above copyright
; notice, this list of conditions and the following disclaimer.
; * Redistributions in binary form must reproduce the above copyright
; notice, this list of conditions and the following disclaimer in
; the documentation and/or other materials provided with the
; distribution.
; * Neither the name of Intel Corporation nor the names of its
; contributors may be used to endorse or promote products derived
; from this software without specific prior written permission.
;
; THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
; "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
; LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
; A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
; OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
; SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
; LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
; DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
; THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
; (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
; OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
%include "options.asm"
%include "stdmac.asm"
%ifndef UTILS_ASM
%define UTILS_ASM
; compare macro
;; sttni2 is faster, but it can't be debugged
;; so following code is based on "mine5"
;; compares 8 bytes at a time, using xor
;; assumes the input buffer has size at least 8
;; compare_r src1, src2, result, result_max, tmp
%macro compare_r 5
%define %%src1 %1
%define %%src2 %2
%define %%result %3
%define %%result_max %4
%define %%tmp %5
%define %%tmp16 %5w ; tmp as a 16-bit register
sub %%result_max, 16
cmp %%result, %%result_max
jg %%_by_8
%%loop1:
mov %%tmp, [%%src1 + %%result]
xor %%tmp, [%%src2 + %%result]
jnz %%miscompare_reg
add %%result, 8
mov %%tmp, [%%src1 + %%result]
xor %%tmp, [%%src2 + %%result]
jnz %%miscompare_reg
add %%result, 8
cmp %%result, %%result_max
jle %%loop1
%%_by_8:
add %%result_max, 8
cmp %%result, %%result_max
jg %%_cmp_last
; compare last two bytes
mov %%tmp, [%%src1 + %%result]
xor %%tmp, [%%src2 + %%result]
jnz %%miscompare_reg
add %%result, 8
%%_cmp_last:
add %%result_max, 8
cmp %%result, %%result_max
je %%end
lea %%result, [%%result_max - 8]
mov %%tmp, [%%src1 + %%result]
xor %%tmp, [%%src2 + %%result]
jnz %%miscompare_reg
add %%result, 8
jmp %%end
%%miscompare_reg:
bsf %%tmp, %%tmp
shr %%tmp, 3
add %%result, %%tmp
%%end:
%endm
;; compares 16 bytes at a time, using pcmpeqb/pmovmskb
;; assumes the input buffer has size at least 8
;; compare_x src1, src2, result, result_max, tmp, xtmp1, xtmp2
%macro compare_x 7
%define %%src1 %1
%define %%src2 %2
%define %%result %3 ; Accumulator for match_length
%define %%result_max %4
%define %%tmp %5
%define %%tmp16 %5w ; tmp as a 16-bit register
%define %%tmp32 %5d ; tmp as a 32-bit register
%define %%xtmp %6
%define %%xtmp2 %7
sub %%result_max, 32
cmp %%result, %%result_max
jg %%_by_16
%%loop1:
MOVDQU %%xtmp, [%%src1 + %%result]
MOVDQU %%xtmp2, [%%src2 + %%result]
PCMPEQB %%xtmp, %%xtmp, %%xtmp2
PMOVMSKB %%tmp32, %%xtmp
xor %%tmp, 0xFFFF
jnz %%miscompare_vect
add %%result, 16
MOVDQU %%xtmp, [%%src1 + %%result]
MOVDQU %%xtmp2, [%%src2 + %%result]
PCMPEQB %%xtmp, %%xtmp, %%xtmp2
PMOVMSKB %%tmp32, %%xtmp
xor %%tmp, 0xFFFF
jnz %%miscompare_vect
add %%result, 16
cmp %%result, %%result_max
jle %%loop1
%%_by_16:
add %%result_max, 16
cmp %%result, %%result_max
jg %%_by_8
MOVDQU %%xtmp, [%%src1 + %%result]
MOVDQU %%xtmp2, [%%src2 + %%result]
PCMPEQB %%xtmp, %%xtmp, %%xtmp2
PMOVMSKB %%tmp32, %%xtmp
xor %%tmp, 0xFFFF
jnz %%miscompare_vect
add %%result, 16
%%_by_8:
add %%result_max, 8
cmp %%result, %%result_max
jg %%_cmp_last
; compare last two bytes
mov %%tmp, [%%src1 + %%result]
xor %%tmp, [%%src2 + %%result]
jnz %%miscompare_reg
add %%result, 8
%%_cmp_last:
add %%result_max, 8
cmp %%result, %%result_max
je %%end
lea %%result, [%%result_max - 8]
mov %%tmp, [%%src1 + %%result]
xor %%tmp, [%%src2 + %%result]
jnz %%miscompare_reg
add %%result, 8
jmp %%end
%%miscompare_reg:
bsf %%tmp, %%tmp
shr %%tmp, 3
add %%result, %%tmp
jmp %%end
%%miscompare_vect:
bsf %%tmp, %%tmp
add %%result, %%tmp
%%end:
%endm
;; compares 32 bytes at a time, using pcmpeqb/pmovmskb
;; assumes the input buffer has size at least 8
;; compare_y src1, src2, result, result_max, tmp, xtmp1, xtmp2
%macro compare_y 7
%define %%src1 %1
%define %%src2 %2
%define %%result %3 ; Accumulator for match_length
%define %%result_max %4
%define %%tmp %5
%define %%tmp16 %5w ; tmp as a 16-bit register
%define %%tmp32 %5d ; tmp as a 32-bit register
%define %%ytmp %6
%define %%ytmp2 %7
sub %%result_max, 64
cmp %%result, %%result_max
jg %%_by_32
%%loop1:
vmovdqu %%ytmp, [%%src1 + %%result]
vmovdqu %%ytmp2, [%%src2 + %%result]
vpcmpeqb %%ytmp, %%ytmp, %%ytmp2
vpmovmskb %%tmp, %%ytmp
xor %%tmp32, 0xFFFFFFFF
jnz %%miscompare_vect
add %%result, 32
vmovdqu %%ytmp, [%%src1 + %%result]
vmovdqu %%ytmp2, [%%src2 + %%result]
vpcmpeqb %%ytmp, %%ytmp, %%ytmp2
vpmovmskb %%tmp, %%ytmp
xor %%tmp32, 0xFFFFFFFF
jnz %%miscompare_vect
add %%result, 32
cmp %%result, %%result_max
jle %%loop1
%%_by_32:
add %%result_max, 32
cmp %%result, %%result_max
jg %%_by_16
vmovdqu %%ytmp, [%%src1 + %%result]
vmovdqu %%ytmp2, [%%src2 + %%result]
vpcmpeqb %%ytmp, %%ytmp, %%ytmp2
vpmovmskb %%tmp, %%ytmp
xor %%tmp32, 0xFFFFFFFF
jnz %%miscompare_vect
add %%result, 32
%%_by_16:
add %%result_max, 16
cmp %%result, %%result_max
jg %%_by_8
vmovdqu %%ytmp %+ x, [%%src1 + %%result]
vmovdqu %%ytmp2 %+ x, [%%src2 + %%result]
vpcmpeqb %%ytmp %+ x, %%ytmp %+ x, %%ytmp2 %+ x
vpmovmskb %%tmp, %%ytmp %+ x
xor %%tmp32, 0xFFFF
jnz %%miscompare_vect
add %%result, 16
%%_by_8:
add %%result_max, 8
cmp %%result, %%result_max
jg %%_cmp_last
mov %%tmp, [%%src1 + %%result]
xor %%tmp, [%%src2 + %%result]
jnz %%miscompare_reg
add %%result, 8
%%_cmp_last:
add %%result_max, 8
cmp %%result, %%result_max
je %%end
lea %%result, [%%result_max - 8]
; compare last two bytes
mov %%tmp, [%%src1 + %%result]
xor %%tmp, [%%src2 + %%result]
jnz %%miscompare_reg
add %%result, 8
jmp %%end
%%miscompare_reg:
bsf %%tmp, %%tmp
shr %%tmp, 3
add %%result, %%tmp
jmp %%end
%%miscompare_vect:
tzcnt %%tmp, %%tmp
add %%result, %%tmp
%%end:
%endm
;; compares 64 bytes at a time
;; compare_z src1, src2, result, result_max, tmp, ktmp, ztmp1, ztmp2
;; Clobbers result_max
%macro compare_z 8
%define %%src1 %1
%define %%src2 %2
%define %%result %3 ; Accumulator for match_length
%define %%result_max %4
%define %%tmp %5 ; tmp as a 16-bit register
%define %%ktmp %6
%define %%ztmp %7
%define %%ztmp2 %8
sub %%result_max, 128
cmp %%result, %%result_max
jg %%_by_64
%%loop1:
vmovdqu8 %%ztmp, [%%src1 + %%result]
vmovdqu8 %%ztmp2, [%%src2 + %%result]
vpcmpb %%ktmp, %%ztmp, %%ztmp2, NEQ
ktestq %%ktmp, %%ktmp
jnz %%miscompare
add %%result, 64
vmovdqu8 %%ztmp, [%%src1 + %%result]
vmovdqu8 %%ztmp2, [%%src2 + %%result]
vpcmpb %%ktmp, %%ztmp, %%ztmp2, NEQ
ktestq %%ktmp, %%ktmp
jnz %%miscompare
add %%result, 64
cmp %%result, %%result_max
jle %%loop1
%%_by_64:
add %%result_max, 64
cmp %%result, %%result_max
jg %%_less_than_64
vmovdqu8 %%ztmp, [%%src1 + %%result]
vmovdqu8 %%ztmp2, [%%src2 + %%result]
vpcmpb %%ktmp, %%ztmp, %%ztmp2, NEQ
ktestq %%ktmp, %%ktmp
jnz %%miscompare
add %%result, 64
%%_less_than_64:
add %%result_max, 64
sub %%result_max, %%result
jle %%end
mov %%tmp, -1
bzhi %%tmp, %%tmp, %%result_max
kmovq %%ktmp, %%tmp
vmovdqu8 %%ztmp {%%ktmp}{z}, [%%src1 + %%result]
vmovdqu8 %%ztmp2 {%%ktmp}{z}, [%%src2 + %%result]
vpcmpb %%ktmp, %%ztmp, %%ztmp2, NEQ
ktestq %%ktmp, %%ktmp
jnz %%miscompare
add %%result, %%result_max
jmp %%end
%%miscompare:
kmovq %%tmp, %%ktmp
tzcnt %%tmp, %%tmp
add %%result, %%tmp
%%end:
%endm
%macro compare250 7
%define %%src1 %1
%define %%src2 %2
%define %%result %3
%define %%result_max %4
%define %%tmp %5
%define %%xtmp0 %6x
%define %%xtmp1 %7x
%define %%ytmp0 %6
%define %%ytmp1 %7
mov %%tmp, 250
cmp %%result_max, 250
cmovg %%result_max, %%tmp
%if (COMPARE_TYPE == 1)
compare_r %%src1, %%src2, %%result, %%result_max, %%tmp
%elif (COMPARE_TYPE == 2)
compare_x %%src1, %%src2, %%result, %%result_max, %%tmp, %%xtmp0, %%xtmp1
%elif (COMPARE_TYPE == 3)
compare_y %%src1, %%src2, %%result, %%result_max, %%tmp, %%ytmp0, %%ytmp1
%else
%error Unknown Compare type COMPARE_TYPE
% error
%endif
%endmacro
; Assumes the buffer has at least 8 bytes
; Accumulates match length onto result
%macro compare_large 7
%define %%src1 %1
%define %%src2 %2
%define %%result %3
%define %%result_max %4
%define %%tmp %5
%define %%xtmp0 %6x
%define %%xtmp1 %7x
%define %%ytmp0 %6
%define %%ytmp1 %7
%if (COMPARE_TYPE == 1)
compare_r %%src1, %%src2, %%result, %%result_max, %%tmp
%elif (COMPARE_TYPE == 2)
compare_x %%src1, %%src2, %%result, %%result_max, %%tmp, %%xtmp0, %%xtmp1
%elif (COMPARE_TYPE == 3)
compare_y %%src1, %%src2, %%result, %%result_max, %%tmp, %%ytmp0, %%ytmp1
%else
%error Unknown Compare type COMPARE_TYPE
% error
%endif
%endmacro
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; compare size, src1, src2, result, tmp
%macro compare 5
%define %%size %1
%define %%src1 %2
%define %%src2 %3
%define %%result %4
%define %%tmp %5
%define %%tmp8 %5b ; tmp as a 8-bit register
xor %%result, %%result
sub %%size, 7
jle %%lab2
%%loop1:
mov %%tmp, [%%src1 + %%result]
xor %%tmp, [%%src2 + %%result]
jnz %%miscompare
add %%result, 8
sub %%size, 8
jg %%loop1
%%lab2:
;; if we fall through from above, we have found no mismatches,
;; %%size+7 is the number of bytes left to look at, and %%result is the
;; number of bytes that have matched
add %%size, 7
jle %%end
%%loop3:
mov %%tmp8, [%%src1 + %%result]
cmp %%tmp8, [%%src2 + %%result]
jne %%end
inc %%result
dec %%size
jg %%loop3
jmp %%end
%%miscompare:
bsf %%tmp, %%tmp
shr %%tmp, 3
add %%result, %%tmp
%%end:
%endm
%endif ;UTILS_ASM
|
