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glibc/sysdeps/i386/i686/multiarch/memcmp-sse4.S

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/* memcmp with SSE4.2, wmemcmp with SSE4.2
Copyright (C) 2010-2017 Free Software Foundation, Inc.
Contributed by Intel Corporation.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#if IS_IN (libc)
# include <sysdep.h>
# ifndef MEMCMP
# define MEMCMP __memcmp_sse4_2
# endif
# define CFI_PUSH(REG) \
cfi_adjust_cfa_offset (4); \
cfi_rel_offset (REG, 0)
# define CFI_POP(REG) \
cfi_adjust_cfa_offset (-4); \
cfi_restore (REG)
# define PUSH(REG) pushl REG; CFI_PUSH (REG)
# define POP(REG) popl REG; CFI_POP (REG)
# define PARMS 4
# define BLK1 PARMS
# define BLK2 BLK1 + 4
# define LEN BLK2 + 4
# define RETURN POP (%ebx); ret; CFI_PUSH (%ebx)
# ifdef SHARED
# define JMPTBL(I, B) I - B
/* Load an entry in a jump table into EBX and branch to it. TABLE is a
jump table with relative offsets. INDEX is a register contains the
index into the jump table. SCALE is the scale of INDEX. */
# define BRANCH_TO_JMPTBL_ENTRY(TABLE, INDEX, SCALE) \
/* We first load PC into EBX. */ \
SETUP_PIC_REG(bx); \
/* Get the address of the jump table. */ \
addl $(TABLE - .), %ebx; \
/* Get the entry and convert the relative offset to the \
absolute address. */ \
addl (%ebx,INDEX,SCALE), %ebx; \
/* We loaded the jump table and adjusted EDX/ESI. Go. */ \
jmp *%ebx
# else
# define JMPTBL(I, B) I
/* Load an entry in a jump table into EBX and branch to it. TABLE is a
jump table with relative offsets. INDEX is a register contains the
index into the jump table. SCALE is the scale of INDEX. */
# define BRANCH_TO_JMPTBL_ENTRY(TABLE, INDEX, SCALE) \
jmp *TABLE(,INDEX,SCALE)
# endif
/* Warning!
wmemcmp has to use SIGNED comparison for elements.
memcmp has to use UNSIGNED comparison for elemnts.
*/
.section .text.sse4.2,"ax",@progbits
ENTRY (MEMCMP)
movl BLK1(%esp), %eax
movl BLK2(%esp), %edx
movl LEN(%esp), %ecx
# ifdef USE_AS_WMEMCMP
shl $2, %ecx
test %ecx, %ecx
jz L(return0)
# else
cmp $1, %ecx
jbe L(less1bytes)
# endif
pxor %xmm0, %xmm0
cmp $64, %ecx
ja L(64bytesormore)
cmp $8, %ecx
# ifndef USE_AS_WMEMCMP
PUSH (%ebx)
jb L(less8bytes)
# else
jb L(less8bytes)
PUSH (%ebx)
# endif
add %ecx, %edx
add %ecx, %eax
BRANCH_TO_JMPTBL_ENTRY(L(table_64bytes), %ecx, 4)
# ifndef USE_AS_WMEMCMP
.p2align 4
L(less8bytes):
mov (%eax), %bl
cmpb (%edx), %bl
jne L(nonzero)
mov 1(%eax), %bl
cmpb 1(%edx), %bl
jne L(nonzero)
cmp $2, %ecx
jz L(0bytes)
mov 2(%eax), %bl
cmpb 2(%edx), %bl
jne L(nonzero)
cmp $3, %ecx
jz L(0bytes)
mov 3(%eax), %bl
cmpb 3(%edx), %bl
jne L(nonzero)
cmp $4, %ecx
jz L(0bytes)
mov 4(%eax), %bl
cmpb 4(%edx), %bl
jne L(nonzero)
cmp $5, %ecx
jz L(0bytes)
mov 5(%eax), %bl
cmpb 5(%edx), %bl
jne L(nonzero)
cmp $6, %ecx
jz L(0bytes)
mov 6(%eax), %bl
cmpb 6(%edx), %bl
je L(0bytes)
L(nonzero):
POP (%ebx)
mov $1, %eax
ja L(above)
neg %eax
L(above):
ret
CFI_PUSH (%ebx)
# endif
.p2align 4
L(0bytes):
POP (%ebx)
xor %eax, %eax
ret
# ifdef USE_AS_WMEMCMP
/* for wmemcmp, case N == 1 */
.p2align 4
L(less8bytes):
mov (%eax), %ecx
cmp (%edx), %ecx
je L(return0)
mov $1, %eax
jg L(find_diff_bigger)
neg %eax
ret
.p2align 4
L(find_diff_bigger):
ret
.p2align 4
L(return0):
xor %eax, %eax
ret
# endif
# ifndef USE_AS_WMEMCMP
.p2align 4
L(less1bytes):
jb L(0bytesend)
movzbl (%eax), %eax
movzbl (%edx), %edx
sub %edx, %eax
ret
.p2align 4
L(0bytesend):
xor %eax, %eax
ret
# endif
.p2align 4
L(64bytesormore):
PUSH (%ebx)
mov %ecx, %ebx
mov $64, %ecx
sub $64, %ebx
L(64bytesormore_loop):
movdqu (%eax), %xmm1
movdqu (%edx), %xmm2
pxor %xmm1, %xmm2
ptest %xmm2, %xmm0
jnc L(find_16diff)
movdqu 16(%eax), %xmm1
movdqu 16(%edx), %xmm2
pxor %xmm1, %xmm2
ptest %xmm2, %xmm0
jnc L(find_32diff)
movdqu 32(%eax), %xmm1
movdqu 32(%edx), %xmm2
pxor %xmm1, %xmm2
ptest %xmm2, %xmm0
jnc L(find_48diff)
movdqu 48(%eax), %xmm1
movdqu 48(%edx), %xmm2
pxor %xmm1, %xmm2
ptest %xmm2, %xmm0
jnc L(find_64diff)
add %ecx, %eax
add %ecx, %edx
sub %ecx, %ebx
jae L(64bytesormore_loop)
add %ebx, %ecx
add %ecx, %edx
add %ecx, %eax
BRANCH_TO_JMPTBL_ENTRY(L(table_64bytes), %ecx, 4)
# ifdef USE_AS_WMEMCMP
/* Label needs only for table_64bytes filling */
L(unreal_case):
/* no code here */
# endif
.p2align 4
L(find_16diff):
sub $16, %ecx
L(find_32diff):
sub $16, %ecx
L(find_48diff):
sub $16, %ecx
L(find_64diff):
add %ecx, %edx
add %ecx, %eax
# ifndef USE_AS_WMEMCMP
.p2align 4
L(16bytes):
mov -16(%eax), %ecx
mov -16(%edx), %ebx
cmp %ebx, %ecx
jne L(find_diff)
L(12bytes):
mov -12(%eax), %ecx
mov -12(%edx), %ebx
cmp %ebx, %ecx
jne L(find_diff)
L(8bytes):
mov -8(%eax), %ecx
mov -8(%edx), %ebx
cmp %ebx, %ecx
jne L(find_diff)
L(4bytes):
mov -4(%eax), %ecx
mov -4(%edx), %ebx
cmp %ebx, %ecx
mov $0, %eax
jne L(find_diff)
RETURN
# else
.p2align 4
L(16bytes):
mov -16(%eax), %ecx
cmp -16(%edx), %ecx
jne L(find_diff)
L(12bytes):
mov -12(%eax), %ecx
cmp -12(%edx), %ecx
jne L(find_diff)
L(8bytes):
mov -8(%eax), %ecx
cmp -8(%edx), %ecx
jne L(find_diff)
L(4bytes):
mov -4(%eax), %ecx
cmp -4(%edx), %ecx
mov $0, %eax
jne L(find_diff)
RETURN
# endif
# ifndef USE_AS_WMEMCMP
.p2align 4
L(49bytes):
movdqu -49(%eax), %xmm1
movdqu -49(%edx), %xmm2
mov $-49, %ebx
pxor %xmm1, %xmm2
ptest %xmm2, %xmm0
jnc L(less16bytes)
L(33bytes):
movdqu -33(%eax), %xmm1
movdqu -33(%edx), %xmm2
mov $-33, %ebx
pxor %xmm1, %xmm2
ptest %xmm2, %xmm0
jnc L(less16bytes)
L(17bytes):
mov -17(%eax), %ecx
mov -17(%edx), %ebx
cmp %ebx, %ecx
jne L(find_diff)
L(13bytes):
mov -13(%eax), %ecx
mov -13(%edx), %ebx
cmp %ebx, %ecx
jne L(find_diff)
L(9bytes):
mov -9(%eax), %ecx
mov -9(%edx), %ebx
cmp %ebx, %ecx
jne L(find_diff)
L(5bytes):
mov -5(%eax), %ecx
mov -5(%edx), %ebx
cmp %ebx, %ecx
jne L(find_diff)
movzbl -1(%eax), %ecx
cmp -1(%edx), %cl
mov $0, %eax
jne L(end)
RETURN
.p2align 4
L(50bytes):
mov $-50, %ebx
movdqu -50(%eax), %xmm1
movdqu -50(%edx), %xmm2
pxor %xmm1, %xmm2
ptest %xmm2, %xmm0
jnc L(less16bytes)
L(34bytes):
mov $-34, %ebx
movdqu -34(%eax), %xmm1
movdqu -34(%edx), %xmm2
pxor %xmm1, %xmm2
ptest %xmm2, %xmm0
jnc L(less16bytes)
L(18bytes):
mov -18(%eax), %ecx
mov -18(%edx), %ebx
cmp %ebx, %ecx
jne L(find_diff)
L(14bytes):
mov -14(%eax), %ecx
mov -14(%edx), %ebx
cmp %ebx, %ecx
jne L(find_diff)
L(10bytes):
mov -10(%eax), %ecx
mov -10(%edx), %ebx
cmp %ebx, %ecx
jne L(find_diff)
L(6bytes):
mov -6(%eax), %ecx
mov -6(%edx), %ebx
cmp %ebx, %ecx
jne L(find_diff)
L(2bytes):
movzwl -2(%eax), %ecx
movzwl -2(%edx), %ebx
cmp %bl, %cl
jne L(end)
cmp %bh, %ch
mov $0, %eax
jne L(end)
RETURN
.p2align 4
L(51bytes):
mov $-51, %ebx
movdqu -51(%eax), %xmm1
movdqu -51(%edx), %xmm2
pxor %xmm1, %xmm2
ptest %xmm2, %xmm0
jnc L(less16bytes)
L(35bytes):
mov $-35, %ebx
movdqu -35(%eax), %xmm1
movdqu -35(%edx), %xmm2
pxor %xmm1, %xmm2
ptest %xmm2, %xmm0
jnc L(less16bytes)
L(19bytes):
movl -19(%eax), %ecx
movl -19(%edx), %ebx
cmp %ebx, %ecx
jne L(find_diff)
L(15bytes):
movl -15(%eax), %ecx
movl -15(%edx), %ebx
cmp %ebx, %ecx
jne L(find_diff)
L(11bytes):
movl -11(%eax), %ecx
movl -11(%edx), %ebx
cmp %ebx, %ecx
jne L(find_diff)
L(7bytes):
movl -7(%eax), %ecx
movl -7(%edx), %ebx
cmp %ebx, %ecx
jne L(find_diff)
L(3bytes):
movzwl -3(%eax), %ecx
movzwl -3(%edx), %ebx
cmpb %bl, %cl
jne L(end)
cmp %bx, %cx
jne L(end)
L(1bytes):
movzbl -1(%eax), %eax
cmpb -1(%edx), %al
mov $0, %eax
jne L(end)
RETURN
# endif
.p2align 4
L(52bytes):
movdqu -52(%eax), %xmm1
movdqu -52(%edx), %xmm2
mov $-52, %ebx
pxor %xmm1, %xmm2
ptest %xmm2, %xmm0
jnc L(less16bytes)
L(36bytes):
movdqu -36(%eax), %xmm1
movdqu -36(%edx), %xmm2
mov $-36, %ebx
pxor %xmm1, %xmm2
ptest %xmm2, %xmm0
jnc L(less16bytes)
L(20bytes):
movdqu -20(%eax), %xmm1
movdqu -20(%edx), %xmm2
mov $-20, %ebx
pxor %xmm1, %xmm2
ptest %xmm2, %xmm0
jnc L(less16bytes)
mov -4(%eax), %ecx
# ifndef USE_AS_WMEMCMP
mov -4(%edx), %ebx
cmp %ebx, %ecx
# else
cmp -4(%edx), %ecx
# endif
mov $0, %eax
jne L(find_diff)
RETURN
# ifndef USE_AS_WMEMCMP
.p2align 4
L(53bytes):
movdqu -53(%eax), %xmm1
movdqu -53(%edx), %xmm2
mov $-53, %ebx
pxor %xmm1, %xmm2
ptest %xmm2, %xmm0
jnc L(less16bytes)
L(37bytes):
mov $-37, %ebx
movdqu -37(%eax), %xmm1
movdqu -37(%edx), %xmm2
pxor %xmm1, %xmm2
ptest %xmm2, %xmm0
jnc L(less16bytes)
L(21bytes):
mov $-21, %ebx
movdqu -21(%eax), %xmm1
movdqu -21(%edx), %xmm2
pxor %xmm1, %xmm2
ptest %xmm2, %xmm0
jnc L(less16bytes)
mov -5(%eax), %ecx
mov -5(%edx), %ebx
cmp %ebx, %ecx
jne L(find_diff)
movzbl -1(%eax), %ecx
cmp -1(%edx), %cl
mov $0, %eax
jne L(end)
RETURN
.p2align 4
L(54bytes):
movdqu -54(%eax), %xmm1
movdqu -54(%edx), %xmm2
mov $-54, %ebx
pxor %xmm1, %xmm2
ptest %xmm2, %xmm0
jnc L(less16bytes)
L(38bytes):
mov $-38, %ebx
movdqu -38(%eax), %xmm1
movdqu -38(%edx), %xmm2
pxor %xmm1, %xmm2
ptest %xmm2, %xmm0
jnc L(less16bytes)
L(22bytes):
mov $-22, %ebx
movdqu -22(%eax), %xmm1
movdqu -22(%edx), %xmm2
pxor %xmm1, %xmm2
ptest %xmm2, %xmm0
jnc L(less16bytes)
mov -6(%eax), %ecx
mov -6(%edx), %ebx
cmp %ebx, %ecx
jne L(find_diff)
movzwl -2(%eax), %ecx
movzwl -2(%edx), %ebx
cmp %bl, %cl
jne L(end)
cmp %bh, %ch
mov $0, %eax
jne L(end)
RETURN
.p2align 4
L(55bytes):
movdqu -55(%eax), %xmm1
movdqu -55(%edx), %xmm2
mov $-55, %ebx
pxor %xmm1, %xmm2
ptest %xmm2, %xmm0
jnc L(less16bytes)
L(39bytes):
mov $-39, %ebx
movdqu -39(%eax), %xmm1
movdqu -39(%edx), %xmm2
pxor %xmm1, %xmm2
ptest %xmm2, %xmm0
jnc L(less16bytes)
L(23bytes):
mov $-23, %ebx
movdqu -23(%eax), %xmm1
movdqu -23(%edx), %xmm2
pxor %xmm1, %xmm2
ptest %xmm2, %xmm0
jnc L(less16bytes)
movl -7(%eax), %ecx
movl -7(%edx), %ebx
cmp %ebx, %ecx
jne L(find_diff)
movzwl -3(%eax), %ecx
movzwl -3(%edx), %ebx
cmpb %bl, %cl
jne L(end)
cmp %bx, %cx
jne L(end)
movzbl -1(%eax), %eax
cmpb -1(%edx), %al
mov $0, %eax
jne L(end)
RETURN
# endif
.p2align 4
L(56bytes):
movdqu -56(%eax), %xmm1
movdqu -56(%edx), %xmm2
mov $-56, %ebx
pxor %xmm1, %xmm2
ptest %xmm2, %xmm0
jnc L(less16bytes)
L(40bytes):
mov $-40, %ebx
movdqu -40(%eax), %xmm1
movdqu -40(%edx), %xmm2
pxor %xmm1, %xmm2
ptest %xmm2, %xmm0
jnc L(less16bytes)
L(24bytes):
mov $-24, %ebx
movdqu -24(%eax), %xmm1
movdqu -24(%edx), %xmm2
pxor %xmm1, %xmm2
ptest %xmm2, %xmm0
jnc L(less16bytes)
mov -8(%eax), %ecx
# ifndef USE_AS_WMEMCMP
mov -8(%edx), %ebx
cmp %ebx, %ecx
# else
cmp -8(%edx), %ecx
# endif
jne L(find_diff)
mov -4(%eax), %ecx
# ifndef USE_AS_WMEMCMP
mov -4(%edx), %ebx
cmp %ebx, %ecx
# else
cmp -4(%edx), %ecx
# endif
mov $0, %eax
jne L(find_diff)
RETURN
# ifndef USE_AS_WMEMCMP
.p2align 4
L(57bytes):
movdqu -57(%eax), %xmm1
movdqu -57(%edx), %xmm2
mov $-57, %ebx
pxor %xmm1, %xmm2
ptest %xmm2, %xmm0
jnc L(less16bytes)
L(41bytes):
mov $-41, %ebx
movdqu -41(%eax), %xmm1
movdqu -41(%edx), %xmm2
pxor %xmm1, %xmm2
ptest %xmm2, %xmm0
jnc L(less16bytes)
L(25bytes):
mov $-25, %ebx
movdqu -25(%eax), %xmm1
movdqu -25(%edx), %xmm2
pxor %xmm1, %xmm2
ptest %xmm2, %xmm0
jnc L(less16bytes)
mov -9(%eax), %ecx
mov -9(%edx), %ebx
cmp %ebx, %ecx
jne L(find_diff)
mov -5(%eax), %ecx
mov -5(%edx), %ebx
cmp %ebx, %ecx
jne L(find_diff)
movzbl -1(%eax), %ecx
cmp -1(%edx), %cl
mov $0, %eax
jne L(end)
RETURN
.p2align 4
L(58bytes):
movdqu -58(%eax), %xmm1
movdqu -58(%edx), %xmm2
mov $-58, %ebx
pxor %xmm1, %xmm2
ptest %xmm2, %xmm0
jnc L(less16bytes)
L(42bytes):
mov $-42, %ebx
movdqu -42(%eax), %xmm1
movdqu -42(%edx), %xmm2
pxor %xmm1, %xmm2
ptest %xmm2, %xmm0
jnc L(less16bytes)
L(26bytes):
mov $-26, %ebx
movdqu -26(%eax), %xmm1
movdqu -26(%edx), %xmm2
pxor %xmm1, %xmm2
ptest %xmm2, %xmm0
jnc L(less16bytes)
mov -10(%eax), %ecx
mov -10(%edx), %ebx
cmp %ebx, %ecx
jne L(find_diff)
mov -6(%eax), %ecx
mov -6(%edx), %ebx
cmp %ebx, %ecx
jne L(find_diff)
movzwl -2(%eax), %ecx
movzwl -2(%edx), %ebx
cmp %bl, %cl
jne L(end)
cmp %bh, %ch
mov $0, %eax
jne L(end)
RETURN
.p2align 4
L(59bytes):
movdqu -59(%eax), %xmm1
movdqu -59(%edx), %xmm2
mov $-59, %ebx
pxor %xmm1, %xmm2
ptest %xmm2, %xmm0
jnc L(less16bytes)
L(43bytes):
mov $-43, %ebx
movdqu -43(%eax), %xmm1
movdqu -43(%edx), %xmm2
pxor %xmm1, %xmm2
ptest %xmm2, %xmm0
jnc L(less16bytes)
L(27bytes):
mov $-27, %ebx
movdqu -27(%eax), %xmm1
movdqu -27(%edx), %xmm2
pxor %xmm1, %xmm2
ptest %xmm2, %xmm0
jnc L(less16bytes)
movl -11(%eax), %ecx
movl -11(%edx), %ebx
cmp %ebx, %ecx
jne L(find_diff)
movl -7(%eax), %ecx
movl -7(%edx), %ebx
cmp %ebx, %ecx
jne L(find_diff)
movzwl -3(%eax), %ecx
movzwl -3(%edx), %ebx
cmpb %bl, %cl
jne L(end)
cmp %bx, %cx
jne L(end)
movzbl -1(%eax), %eax
cmpb -1(%edx), %al
mov $0, %eax
jne L(end)
RETURN
# endif
.p2align 4
L(60bytes):
movdqu -60(%eax), %xmm1
movdqu -60(%edx), %xmm2
mov $-60, %ebx
pxor %xmm1, %xmm2
ptest %xmm2, %xmm0
jnc L(less16bytes)
L(44bytes):
mov $-44, %ebx
movdqu -44(%eax), %xmm1
movdqu -44(%edx), %xmm2
pxor %xmm1, %xmm2
ptest %xmm2, %xmm0
jnc L(less16bytes)
L(28bytes):
mov $-28, %ebx
movdqu -28(%eax), %xmm1
movdqu -28(%edx), %xmm2
pxor %xmm1, %xmm2
ptest %xmm2, %xmm0
jnc L(less16bytes)
mov -12(%eax), %ecx
# ifndef USE_AS_WMEMCMP
mov -12(%edx), %ebx
cmp %ebx, %ecx
# else
cmp -12(%edx), %ecx
# endif
jne L(find_diff)
mov -8(%eax), %ecx
# ifndef USE_AS_WMEMCMP
mov -8(%edx), %ebx
cmp %ebx, %ecx
# else
cmp -8(%edx), %ecx
# endif
jne L(find_diff)
mov -4(%eax), %ecx
# ifndef USE_AS_WMEMCMP
mov -4(%edx), %ebx
cmp %ebx, %ecx
# else
cmp -4(%edx), %ecx
# endif
mov $0, %eax
jne L(find_diff)
RETURN
# ifndef USE_AS_WMEMCMP
.p2align 4
L(61bytes):
movdqu -61(%eax), %xmm1
movdqu -61(%edx), %xmm2
mov $-61, %ebx
pxor %xmm1, %xmm2
ptest %xmm2, %xmm0
jnc L(less16bytes)
L(45bytes):
mov $-45, %ebx
movdqu -45(%eax), %xmm1
movdqu -45(%edx), %xmm2
pxor %xmm1, %xmm2
ptest %xmm2, %xmm0
jnc L(less16bytes)
L(29bytes):
mov $-29, %ebx
movdqu -29(%eax), %xmm1
movdqu -29(%edx), %xmm2
pxor %xmm1, %xmm2
ptest %xmm2, %xmm0
jnc L(less16bytes)
mov -13(%eax), %ecx
mov -13(%edx), %ebx
cmp %ebx, %ecx
jne L(find_diff)
mov -9(%eax), %ecx
mov -9(%edx), %ebx
cmp %ebx, %ecx
jne L(find_diff)
mov -5(%eax), %ecx
mov -5(%edx), %ebx
cmp %ebx, %ecx
jne L(find_diff)
movzbl -1(%eax), %ecx
cmp -1(%edx), %cl
mov $0, %eax
jne L(end)
RETURN
.p2align 4
L(62bytes):
movdqu -62(%eax), %xmm1
movdqu -62(%edx), %xmm2
mov $-62, %ebx
pxor %xmm1, %xmm2
ptest %xmm2, %xmm0
jnc L(less16bytes)
L(46bytes):
mov $-46, %ebx
movdqu -46(%eax), %xmm1
movdqu -46(%edx), %xmm2
pxor %xmm1, %xmm2
ptest %xmm2, %xmm0
jnc L(less16bytes)
L(30bytes):
mov $-30, %ebx
movdqu -30(%eax), %xmm1
movdqu -30(%edx), %xmm2
pxor %xmm1, %xmm2
ptest %xmm2, %xmm0
jnc L(less16bytes)
mov -14(%eax), %ecx
mov -14(%edx), %ebx
cmp %ebx, %ecx
jne L(find_diff)
mov -10(%eax), %ecx
mov -10(%edx), %ebx
cmp %ebx, %ecx
jne L(find_diff)
mov -6(%eax), %ecx
mov -6(%edx), %ebx
cmp %ebx, %ecx
jne L(find_diff)
movzwl -2(%eax), %ecx
movzwl -2(%edx), %ebx
cmp %bl, %cl
jne L(end)
cmp %bh, %ch
mov $0, %eax
jne L(end)
RETURN
.p2align 4
L(63bytes):
movdqu -63(%eax), %xmm1
movdqu -63(%edx), %xmm2
mov $-63, %ebx
pxor %xmm1, %xmm2
ptest %xmm2, %xmm0
jnc L(less16bytes)
L(47bytes):
mov $-47, %ebx
movdqu -47(%eax), %xmm1
movdqu -47(%edx), %xmm2
pxor %xmm1, %xmm2
ptest %xmm2, %xmm0
jnc L(less16bytes)
L(31bytes):
mov $-31, %ebx
movdqu -31(%eax), %xmm1
movdqu -31(%edx), %xmm2
pxor %xmm1, %xmm2
ptest %xmm2, %xmm0
jnc L(less16bytes)
movl -15(%eax), %ecx
movl -15(%edx), %ebx
cmp %ebx, %ecx
jne L(find_diff)
movl -11(%eax), %ecx
movl -11(%edx), %ebx
cmp %ebx, %ecx
jne L(find_diff)
movl -7(%eax), %ecx
movl -7(%edx), %ebx
cmp %ebx, %ecx
jne L(find_diff)
movzwl -3(%eax), %ecx
movzwl -3(%edx), %ebx
cmpb %bl, %cl
jne L(end)
cmp %bx, %cx
jne L(end)
movzbl -1(%eax), %eax
cmpb -1(%edx), %al
mov $0, %eax
jne L(end)
RETURN
# endif
.p2align 4
L(64bytes):
movdqu -64(%eax), %xmm1
movdqu -64(%edx), %xmm2
mov $-64, %ebx
pxor %xmm1, %xmm2
ptest %xmm2, %xmm0
jnc L(less16bytes)
L(48bytes):
movdqu -48(%eax), %xmm1
movdqu -48(%edx), %xmm2
mov $-48, %ebx
pxor %xmm1, %xmm2
ptest %xmm2, %xmm0
jnc L(less16bytes)
L(32bytes):
movdqu -32(%eax), %xmm1
movdqu -32(%edx), %xmm2
mov $-32, %ebx
pxor %xmm1, %xmm2
ptest %xmm2, %xmm0
jnc L(less16bytes)
mov -16(%eax), %ecx
# ifndef USE_AS_WMEMCMP
mov -16(%edx), %ebx
cmp %ebx, %ecx
# else
cmp -16(%edx), %ecx
# endif
jne L(find_diff)
mov -12(%eax), %ecx
# ifndef USE_AS_WMEMCMP
mov -12(%edx), %ebx
cmp %ebx, %ecx
# else
cmp -12(%edx), %ecx
# endif
jne L(find_diff)
mov -8(%eax), %ecx
# ifndef USE_AS_WMEMCMP
mov -8(%edx), %ebx
cmp %ebx, %ecx
# else
cmp -8(%edx), %ecx
# endif
jne L(find_diff)
mov -4(%eax), %ecx
# ifndef USE_AS_WMEMCMP
mov -4(%edx), %ebx
cmp %ebx, %ecx
# else
cmp -4(%edx), %ecx
# endif
mov $0, %eax
jne L(find_diff)
RETURN
# ifndef USE_AS_WMEMCMP
.p2align 4
L(less16bytes):
add %ebx, %eax
add %ebx, %edx
mov (%eax), %ecx
mov (%edx), %ebx
cmp %ebx, %ecx
jne L(find_diff)
mov 4(%eax), %ecx
mov 4(%edx), %ebx
cmp %ebx, %ecx
jne L(find_diff)
mov 8(%eax), %ecx
mov 8(%edx), %ebx
cmp %ebx, %ecx
jne L(find_diff)
mov 12(%eax), %ecx
mov 12(%edx), %ebx
cmp %ebx, %ecx
mov $0, %eax
jne L(find_diff)
RETURN
# else
.p2align 4
L(less16bytes):
add %ebx, %eax
add %ebx, %edx
mov (%eax), %ecx
cmp (%edx), %ecx
jne L(find_diff)
mov 4(%eax), %ecx
cmp 4(%edx), %ecx
jne L(find_diff)
mov 8(%eax), %ecx
cmp 8(%edx), %ecx
jne L(find_diff)
mov 12(%eax), %ecx
cmp 12(%edx), %ecx
mov $0, %eax
jne L(find_diff)
RETURN
# endif
.p2align 4
L(find_diff):
# ifndef USE_AS_WMEMCMP
cmpb %bl, %cl
jne L(end)
cmp %bx, %cx
jne L(end)
shr $16,%ecx
shr $16,%ebx
cmp %bl, %cl
jne L(end)
cmp %bx, %cx
L(end):
POP (%ebx)
mov $1, %eax
ja L(bigger)
neg %eax
L(bigger):
ret
# else
POP (%ebx)
mov $1, %eax
jg L(bigger)
neg %eax
ret
.p2align 4
L(bigger):
ret
# endif
END (MEMCMP)
.section .rodata.sse4.2,"a",@progbits
.p2align 2
.type L(table_64bytes), @object
# ifndef USE_AS_WMEMCMP
L(table_64bytes):
.int JMPTBL (L(0bytes), L(table_64bytes))
.int JMPTBL (L(1bytes), L(table_64bytes))
.int JMPTBL (L(2bytes), L(table_64bytes))
.int JMPTBL (L(3bytes), L(table_64bytes))
.int JMPTBL (L(4bytes), L(table_64bytes))
.int JMPTBL (L(5bytes), L(table_64bytes))
.int JMPTBL (L(6bytes), L(table_64bytes))
.int JMPTBL (L(7bytes), L(table_64bytes))
.int JMPTBL (L(8bytes), L(table_64bytes))
.int JMPTBL (L(9bytes), L(table_64bytes))
.int JMPTBL (L(10bytes), L(table_64bytes))
.int JMPTBL (L(11bytes), L(table_64bytes))
.int JMPTBL (L(12bytes), L(table_64bytes))
.int JMPTBL (L(13bytes), L(table_64bytes))
.int JMPTBL (L(14bytes), L(table_64bytes))
.int JMPTBL (L(15bytes), L(table_64bytes))
.int JMPTBL (L(16bytes), L(table_64bytes))
.int JMPTBL (L(17bytes), L(table_64bytes))
.int JMPTBL (L(18bytes), L(table_64bytes))
.int JMPTBL (L(19bytes), L(table_64bytes))
.int JMPTBL (L(20bytes), L(table_64bytes))
.int JMPTBL (L(21bytes), L(table_64bytes))
.int JMPTBL (L(22bytes), L(table_64bytes))
.int JMPTBL (L(23bytes), L(table_64bytes))
.int JMPTBL (L(24bytes), L(table_64bytes))
.int JMPTBL (L(25bytes), L(table_64bytes))
.int JMPTBL (L(26bytes), L(table_64bytes))
.int JMPTBL (L(27bytes), L(table_64bytes))
.int JMPTBL (L(28bytes), L(table_64bytes))
.int JMPTBL (L(29bytes), L(table_64bytes))
.int JMPTBL (L(30bytes), L(table_64bytes))
.int JMPTBL (L(31bytes), L(table_64bytes))
.int JMPTBL (L(32bytes), L(table_64bytes))
.int JMPTBL (L(33bytes), L(table_64bytes))
.int JMPTBL (L(34bytes), L(table_64bytes))
.int JMPTBL (L(35bytes), L(table_64bytes))
.int JMPTBL (L(36bytes), L(table_64bytes))
.int JMPTBL (L(37bytes), L(table_64bytes))
.int JMPTBL (L(38bytes), L(table_64bytes))
.int JMPTBL (L(39bytes), L(table_64bytes))
.int JMPTBL (L(40bytes), L(table_64bytes))
.int JMPTBL (L(41bytes), L(table_64bytes))
.int JMPTBL (L(42bytes), L(table_64bytes))
.int JMPTBL (L(43bytes), L(table_64bytes))
.int JMPTBL (L(44bytes), L(table_64bytes))
.int JMPTBL (L(45bytes), L(table_64bytes))
.int JMPTBL (L(46bytes), L(table_64bytes))
.int JMPTBL (L(47bytes), L(table_64bytes))
.int JMPTBL (L(48bytes), L(table_64bytes))
.int JMPTBL (L(49bytes), L(table_64bytes))
.int JMPTBL (L(50bytes), L(table_64bytes))
.int JMPTBL (L(51bytes), L(table_64bytes))
.int JMPTBL (L(52bytes), L(table_64bytes))
.int JMPTBL (L(53bytes), L(table_64bytes))
.int JMPTBL (L(54bytes), L(table_64bytes))
.int JMPTBL (L(55bytes), L(table_64bytes))
.int JMPTBL (L(56bytes), L(table_64bytes))
.int JMPTBL (L(57bytes), L(table_64bytes))
.int JMPTBL (L(58bytes), L(table_64bytes))
.int JMPTBL (L(59bytes), L(table_64bytes))
.int JMPTBL (L(60bytes), L(table_64bytes))
.int JMPTBL (L(61bytes), L(table_64bytes))
.int JMPTBL (L(62bytes), L(table_64bytes))
.int JMPTBL (L(63bytes), L(table_64bytes))
.int JMPTBL (L(64bytes), L(table_64bytes))
# else
L(table_64bytes):
.int JMPTBL (L(0bytes), L(table_64bytes))
.int JMPTBL (L(unreal_case), L(table_64bytes))
.int JMPTBL (L(unreal_case), L(table_64bytes))
.int JMPTBL (L(unreal_case), L(table_64bytes))
.int JMPTBL (L(4bytes), L(table_64bytes))
.int JMPTBL (L(unreal_case), L(table_64bytes))
.int JMPTBL (L(unreal_case), L(table_64bytes))
.int JMPTBL (L(unreal_case), L(table_64bytes))
.int JMPTBL (L(8bytes), L(table_64bytes))
.int JMPTBL (L(unreal_case), L(table_64bytes))
.int JMPTBL (L(unreal_case), L(table_64bytes))
.int JMPTBL (L(unreal_case), L(table_64bytes))
.int JMPTBL (L(12bytes), L(table_64bytes))
.int JMPTBL (L(unreal_case), L(table_64bytes))
.int JMPTBL (L(unreal_case), L(table_64bytes))
.int JMPTBL (L(unreal_case), L(table_64bytes))
.int JMPTBL (L(16bytes), L(table_64bytes))
.int JMPTBL (L(unreal_case), L(table_64bytes))
.int JMPTBL (L(unreal_case), L(table_64bytes))
.int JMPTBL (L(unreal_case), L(table_64bytes))
.int JMPTBL (L(20bytes), L(table_64bytes))
.int JMPTBL (L(unreal_case), L(table_64bytes))
.int JMPTBL (L(unreal_case), L(table_64bytes))
.int JMPTBL (L(unreal_case), L(table_64bytes))
.int JMPTBL (L(24bytes), L(table_64bytes))
.int JMPTBL (L(unreal_case), L(table_64bytes))
.int JMPTBL (L(unreal_case), L(table_64bytes))
.int JMPTBL (L(unreal_case), L(table_64bytes))
.int JMPTBL (L(28bytes), L(table_64bytes))
.int JMPTBL (L(unreal_case), L(table_64bytes))
.int JMPTBL (L(unreal_case), L(table_64bytes))
.int JMPTBL (L(unreal_case), L(table_64bytes))
.int JMPTBL (L(32bytes), L(table_64bytes))
.int JMPTBL (L(unreal_case), L(table_64bytes))
.int JMPTBL (L(unreal_case), L(table_64bytes))
.int JMPTBL (L(unreal_case), L(table_64bytes))
.int JMPTBL (L(36bytes), L(table_64bytes))
.int JMPTBL (L(unreal_case), L(table_64bytes))
.int JMPTBL (L(unreal_case), L(table_64bytes))
.int JMPTBL (L(unreal_case), L(table_64bytes))
.int JMPTBL (L(40bytes), L(table_64bytes))
.int JMPTBL (L(unreal_case), L(table_64bytes))
.int JMPTBL (L(unreal_case), L(table_64bytes))
.int JMPTBL (L(unreal_case), L(table_64bytes))
.int JMPTBL (L(44bytes), L(table_64bytes))
.int JMPTBL (L(unreal_case), L(table_64bytes))
.int JMPTBL (L(unreal_case), L(table_64bytes))
.int JMPTBL (L(unreal_case), L(table_64bytes))
.int JMPTBL (L(48bytes), L(table_64bytes))
.int JMPTBL (L(unreal_case), L(table_64bytes))
.int JMPTBL (L(unreal_case), L(table_64bytes))
.int JMPTBL (L(unreal_case), L(table_64bytes))
.int JMPTBL (L(52bytes), L(table_64bytes))
.int JMPTBL (L(unreal_case), L(table_64bytes))
.int JMPTBL (L(unreal_case), L(table_64bytes))
.int JMPTBL (L(unreal_case), L(table_64bytes))
.int JMPTBL (L(56bytes), L(table_64bytes))
.int JMPTBL (L(unreal_case), L(table_64bytes))
.int JMPTBL (L(unreal_case), L(table_64bytes))
.int JMPTBL (L(unreal_case), L(table_64bytes))
.int JMPTBL (L(60bytes), L(table_64bytes))
.int JMPTBL (L(unreal_case), L(table_64bytes))
.int JMPTBL (L(unreal_case), L(table_64bytes))
.int JMPTBL (L(unreal_case), L(table_64bytes))
.int JMPTBL (L(64bytes), L(table_64bytes))
# endif
#endif
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