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dfc93c41ee
Check PIC, instead of SHARED, to enable PIC setups. * sysdeps/i386/i686/multiarch/memcmp-sse4.S: Check PIC instead of SHARED. * sysdeps/i386/i686/multiarch/memcpy-sse2-unaligned.S: Likewise. * sysdeps/i386/i686/multiarch/memcpy-ssse3-rep.S: Likewise. * sysdeps/i386/i686/multiarch/memcpy-ssse3.S: Likewise. * sysdeps/i386/i686/multiarch/memset-sse2-rep.S: Likewise. * sysdeps/i386/i686/multiarch/memset-sse2.S: Likewise. * sysdeps/i386/i686/multiarch/strcat-sse2.S: Likewise. * sysdeps/i386/i686/multiarch/strcpy-sse2.S: Likewise.
682 lines
15 KiB
ArmAsm
682 lines
15 KiB
ArmAsm
/* memcpy optimized with SSE2 unaligned memory access instructions.
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Copyright (C) 2014-2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#if IS_IN (libc) \
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&& (defined SHARED \
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|| defined USE_AS_MEMMOVE \
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|| !defined USE_MULTIARCH)
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# include <sysdep.h>
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# include "asm-syntax.h"
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# ifndef MEMCPY
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# define MEMCPY __memcpy_sse2_unaligned
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# define MEMCPY_CHK __memcpy_chk_sse2_unaligned
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# endif
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# ifdef USE_AS_BCOPY
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# define SRC PARMS
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# define DEST SRC+4
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# define LEN DEST+4
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# else
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# define DEST PARMS
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# define SRC DEST+4
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# define LEN SRC+4
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# endif
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# define CFI_PUSH(REG) \
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cfi_adjust_cfa_offset (4); \
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cfi_rel_offset (REG, 0)
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# define CFI_POP(REG) \
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cfi_adjust_cfa_offset (-4); \
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cfi_restore (REG)
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# define PUSH(REG) pushl REG; CFI_PUSH (REG)
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# define POP(REG) popl REG; CFI_POP (REG)
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# define PARMS 8 /* Preserve EBX. */
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# define ENTRANCE PUSH (%ebx);
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# define RETURN_END POP (%ebx); ret
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# define RETURN RETURN_END; CFI_PUSH (%ebx)
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.section .text.sse2,"ax",@progbits
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# if !defined USE_AS_BCOPY && defined SHARED
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ENTRY (MEMCPY_CHK)
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movl 12(%esp), %eax
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cmpl %eax, 16(%esp)
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jb HIDDEN_JUMPTARGET (__chk_fail)
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END (MEMCPY_CHK)
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# endif
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ENTRY (MEMCPY)
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ENTRANCE
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movl LEN(%esp), %ecx
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movl SRC(%esp), %eax
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movl DEST(%esp), %edx
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cmp %edx, %eax
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# ifdef USE_AS_MEMMOVE
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jg L(check_forward)
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L(mm_len_0_or_more_backward):
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/* Now do checks for lengths. We do [0..16], [16..32], [32..64], [64..128]
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separately. */
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cmp $16, %ecx
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jbe L(mm_len_0_16_bytes_backward)
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cmpl $32, %ecx
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jg L(mm_len_32_or_more_backward)
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/* Copy [0..32] and return. */
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movdqu (%eax), %xmm0
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movdqu -16(%eax, %ecx), %xmm1
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movdqu %xmm0, (%edx)
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movdqu %xmm1, -16(%edx, %ecx)
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jmp L(return)
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L(mm_len_32_or_more_backward):
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cmpl $64, %ecx
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jg L(mm_len_64_or_more_backward)
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/* Copy [0..64] and return. */
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movdqu (%eax), %xmm0
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movdqu 16(%eax), %xmm1
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movdqu -16(%eax, %ecx), %xmm2
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movdqu -32(%eax, %ecx), %xmm3
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movdqu %xmm0, (%edx)
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movdqu %xmm1, 16(%edx)
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movdqu %xmm2, -16(%edx, %ecx)
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movdqu %xmm3, -32(%edx, %ecx)
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jmp L(return)
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L(mm_len_64_or_more_backward):
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cmpl $128, %ecx
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jg L(mm_len_128_or_more_backward)
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/* Copy [0..128] and return. */
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movdqu (%eax), %xmm0
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movdqu 16(%eax), %xmm1
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movdqu 32(%eax), %xmm2
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movdqu 48(%eax), %xmm3
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movdqu -64(%eax, %ecx), %xmm4
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movdqu -48(%eax, %ecx), %xmm5
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movdqu -32(%eax, %ecx), %xmm6
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movdqu -16(%eax, %ecx), %xmm7
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movdqu %xmm0, (%edx)
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movdqu %xmm1, 16(%edx)
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movdqu %xmm2, 32(%edx)
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movdqu %xmm3, 48(%edx)
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movdqu %xmm4, -64(%edx, %ecx)
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movdqu %xmm5, -48(%edx, %ecx)
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movdqu %xmm6, -32(%edx, %ecx)
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movdqu %xmm7, -16(%edx, %ecx)
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jmp L(return)
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L(mm_len_128_or_more_backward):
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add %ecx, %eax
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cmp %edx, %eax
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movl SRC(%esp), %eax
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jle L(forward)
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PUSH (%esi)
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PUSH (%edi)
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PUSH (%ebx)
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/* Aligning the address of destination. */
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movdqu (%eax), %xmm4
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movdqu 16(%eax), %xmm5
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movdqu 32(%eax), %xmm6
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movdqu 48(%eax), %xmm7
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leal (%edx, %ecx), %esi
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movdqu -16(%eax, %ecx), %xmm0
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subl $16, %esp
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movdqu %xmm0, (%esp)
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mov %ecx, %edi
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movl %esi, %ecx
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andl $-16, %ecx
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leal (%ecx), %ebx
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subl %edx, %ebx
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leal (%eax, %ebx), %eax
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shrl $6, %ebx
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# ifdef SHARED_CACHE_SIZE_HALF
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cmp $SHARED_CACHE_SIZE_HALF, %edi
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# else
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# ifdef PIC
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PUSH (%ebx)
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SETUP_PIC_REG (bx)
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add $_GLOBAL_OFFSET_TABLE_, %ebx
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cmp __x86_shared_cache_size_half@GOTOFF(%ebx), %edi
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POP (%ebx)
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# else
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cmp __x86_shared_cache_size_half, %edi
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# endif
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# endif
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jae L(mm_large_page_loop_backward)
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.p2align 4
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L(mm_main_loop_backward):
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prefetcht0 -128(%eax)
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movdqu -64(%eax), %xmm0
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movdqu -48(%eax), %xmm1
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movdqu -32(%eax), %xmm2
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movdqu -16(%eax), %xmm3
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movaps %xmm0, -64(%ecx)
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subl $64, %eax
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movaps %xmm1, -48(%ecx)
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movaps %xmm2, -32(%ecx)
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movaps %xmm3, -16(%ecx)
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subl $64, %ecx
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sub $1, %ebx
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jnz L(mm_main_loop_backward)
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movdqu (%esp), %xmm0
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addl $16, %esp
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movdqu %xmm0, -16(%esi)
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movdqu %xmm4, (%edx)
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movdqu %xmm5, 16(%edx)
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movdqu %xmm6, 32(%edx)
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movdqu %xmm7, 48(%edx)
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POP (%ebx)
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jmp L(mm_return_pop_all)
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/* Copy [0..16] and return. */
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L(mm_len_0_16_bytes_backward):
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testb $24, %cl
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jnz L(mm_len_9_16_bytes_backward)
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testb $4, %cl
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.p2align 4,,5
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jnz L(mm_len_5_8_bytes_backward)
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testl %ecx, %ecx
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.p2align 4,,2
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je L(return)
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testb $2, %cl
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.p2align 4,,1
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jne L(mm_len_3_4_bytes_backward)
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movzbl -1(%eax,%ecx), %ebx
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movzbl (%eax), %eax
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movb %bl, -1(%edx,%ecx)
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movb %al, (%edx)
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jmp L(return)
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L(mm_len_3_4_bytes_backward):
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movzwl -2(%eax,%ecx), %ebx
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movzwl (%eax), %eax
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movw %bx, -2(%edx,%ecx)
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movw %ax, (%edx)
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jmp L(return)
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L(mm_len_9_16_bytes_backward):
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PUSH (%esi)
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movl -4(%eax,%ecx), %ebx
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movl -8(%eax,%ecx), %esi
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movl %ebx, -4(%edx,%ecx)
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movl %esi, -8(%edx,%ecx)
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subl $8, %ecx
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POP (%esi)
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jmp L(mm_len_0_16_bytes_backward)
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L(mm_len_5_8_bytes_backward):
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movl (%eax), %ebx
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movl -4(%eax,%ecx), %eax
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movl %ebx, (%edx)
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movl %eax, -4(%edx,%ecx)
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jmp L(return)
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/* Big length copy backward part. */
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.p2align 4
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L(mm_large_page_loop_backward):
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movdqu -64(%eax), %xmm0
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movdqu -48(%eax), %xmm1
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movdqu -32(%eax), %xmm2
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movdqu -16(%eax), %xmm3
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movntdq %xmm0, -64(%ecx)
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subl $64, %eax
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movntdq %xmm1, -48(%ecx)
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movntdq %xmm2, -32(%ecx)
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movntdq %xmm3, -16(%ecx)
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subl $64, %ecx
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sub $1, %ebx
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jnz L(mm_large_page_loop_backward)
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sfence
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movdqu (%esp), %xmm0
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addl $16, %esp
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movdqu %xmm0, -16(%esi)
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movdqu %xmm4, (%edx)
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movdqu %xmm5, 16(%edx)
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movdqu %xmm6, 32(%edx)
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movdqu %xmm7, 48(%edx)
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POP (%ebx)
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jmp L(mm_return_pop_all)
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L(check_forward):
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add %edx, %ecx
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cmp %eax, %ecx
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movl LEN(%esp), %ecx
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jle L(forward)
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/* Now do checks for lengths. We do [0..16], [0..32], [0..64], [0..128]
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separately. */
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cmp $16, %ecx
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jbe L(mm_len_0_16_bytes_forward)
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cmpl $32, %ecx
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ja L(mm_len_32_or_more_forward)
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/* Copy [0..32] and return. */
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movdqu (%eax), %xmm0
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movdqu -16(%eax, %ecx), %xmm1
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movdqu %xmm0, (%edx)
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movdqu %xmm1, -16(%edx, %ecx)
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jmp L(return)
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L(mm_len_32_or_more_forward):
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cmpl $64, %ecx
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ja L(mm_len_64_or_more_forward)
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/* Copy [0..64] and return. */
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movdqu (%eax), %xmm0
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movdqu 16(%eax), %xmm1
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movdqu -16(%eax, %ecx), %xmm2
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movdqu -32(%eax, %ecx), %xmm3
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movdqu %xmm0, (%edx)
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movdqu %xmm1, 16(%edx)
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movdqu %xmm2, -16(%edx, %ecx)
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movdqu %xmm3, -32(%edx, %ecx)
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jmp L(return)
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L(mm_len_64_or_more_forward):
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cmpl $128, %ecx
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ja L(mm_len_128_or_more_forward)
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/* Copy [0..128] and return. */
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movdqu (%eax), %xmm0
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movdqu 16(%eax), %xmm1
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movdqu 32(%eax), %xmm2
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movdqu 48(%eax), %xmm3
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movdqu -64(%eax, %ecx), %xmm4
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movdqu -48(%eax, %ecx), %xmm5
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movdqu -32(%eax, %ecx), %xmm6
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movdqu -16(%eax, %ecx), %xmm7
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movdqu %xmm0, (%edx)
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movdqu %xmm1, 16(%edx)
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movdqu %xmm2, 32(%edx)
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movdqu %xmm3, 48(%edx)
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movdqu %xmm4, -64(%edx, %ecx)
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movdqu %xmm5, -48(%edx, %ecx)
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movdqu %xmm6, -32(%edx, %ecx)
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movdqu %xmm7, -16(%edx, %ecx)
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jmp L(return)
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L(mm_len_128_or_more_forward):
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PUSH (%esi)
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PUSH (%edi)
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PUSH (%ebx)
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/* Aligning the address of destination. */
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movdqu -16(%eax, %ecx), %xmm4
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movdqu -32(%eax, %ecx), %xmm5
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movdqu -48(%eax, %ecx), %xmm6
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movdqu -64(%eax, %ecx), %xmm7
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leal (%edx, %ecx), %esi
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movdqu (%eax), %xmm0
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subl $16, %esp
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movdqu %xmm0, (%esp)
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mov %ecx, %edi
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leal 16(%edx), %ecx
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andl $-16, %ecx
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movl %ecx, %ebx
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subl %edx, %ebx
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addl %ebx, %eax
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movl %esi, %ebx
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subl %ecx, %ebx
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shrl $6, %ebx
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# ifdef SHARED_CACHE_SIZE_HALF
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cmp $SHARED_CACHE_SIZE_HALF, %edi
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# else
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# ifdef PIC
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PUSH (%ebx)
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SETUP_PIC_REG(bx)
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add $_GLOBAL_OFFSET_TABLE_, %ebx
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cmp __x86_shared_cache_size_half@GOTOFF(%ebx), %edi
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POP (%ebx)
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# else
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cmp __x86_shared_cache_size_half, %edi
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# endif
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# endif
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jae L(mm_large_page_loop_forward)
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.p2align 4
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L(mm_main_loop_forward):
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prefetcht0 128(%eax)
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movdqu (%eax), %xmm0
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movdqu 16(%eax), %xmm1
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movdqu 32(%eax), %xmm2
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movdqu 48(%eax), %xmm3
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movdqa %xmm0, (%ecx)
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addl $64, %eax
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movaps %xmm1, 16(%ecx)
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movaps %xmm2, 32(%ecx)
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movaps %xmm3, 48(%ecx)
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addl $64, %ecx
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sub $1, %ebx
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jnz L(mm_main_loop_forward)
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movdqu (%esp), %xmm0
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addl $16, %esp
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movdqu %xmm0, (%edx)
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movdqu %xmm4, -16(%esi)
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movdqu %xmm5, -32(%esi)
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movdqu %xmm6, -48(%esi)
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movdqu %xmm7, -64(%esi)
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POP (%ebx)
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jmp L(mm_return_pop_all)
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L(mm_len_0_16_bytes_forward):
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testb $24, %cl
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jne L(mm_len_9_16_bytes_forward)
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testb $4, %cl
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.p2align 4,,5
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jne L(mm_len_5_8_bytes_forward)
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testl %ecx, %ecx
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.p2align 4,,2
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je L(return)
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testb $2, %cl
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.p2align 4,,1
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jne L(mm_len_2_4_bytes_forward)
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movzbl -1(%eax,%ecx), %ebx
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movzbl (%eax), %eax
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movb %bl, -1(%edx,%ecx)
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movb %al, (%edx)
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jmp L(return)
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L(mm_len_2_4_bytes_forward):
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movzwl -2(%eax,%ecx), %ebx
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movzwl (%eax), %eax
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movw %bx, -2(%edx,%ecx)
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movw %ax, (%edx)
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jmp L(return)
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L(mm_len_5_8_bytes_forward):
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movl (%eax), %ebx
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movl -4(%eax,%ecx), %eax
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movl %ebx, (%edx)
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movl %eax, -4(%edx,%ecx)
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jmp L(return)
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L(mm_len_9_16_bytes_forward):
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movq (%eax), %xmm0
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movq -8(%eax, %ecx), %xmm1
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movq %xmm0, (%edx)
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movq %xmm1, -8(%edx, %ecx)
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jmp L(return)
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L(mm_return_pop_all):
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movl %edx, %eax
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POP (%edi)
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POP (%esi)
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RETURN
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/* Big length copy forward part. */
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.p2align 4
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L(mm_large_page_loop_forward):
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movdqu (%eax), %xmm0
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movdqu 16(%eax), %xmm1
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movdqu 32(%eax), %xmm2
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movdqu 48(%eax), %xmm3
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movntdq %xmm0, (%ecx)
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addl $64, %eax
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movntdq %xmm1, 16(%ecx)
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movntdq %xmm2, 32(%ecx)
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movntdq %xmm3, 48(%ecx)
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addl $64, %ecx
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sub $1, %ebx
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jnz L(mm_large_page_loop_forward)
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sfence
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movdqu (%esp), %xmm0
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addl $16, %esp
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movdqu %xmm0, (%edx)
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movdqu %xmm4, -16(%esi)
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movdqu %xmm5, -32(%esi)
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movdqu %xmm6, -48(%esi)
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movdqu %xmm7, -64(%esi)
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POP (%ebx)
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jmp L(mm_return_pop_all)
|
|
# endif
|
|
|
|
L(forward):
|
|
cmp $16, %ecx
|
|
jbe L(len_0_16_bytes)
|
|
|
|
# ifdef SHARED_CACHE_SIZE_HALF
|
|
cmp $SHARED_CACHE_SIZE_HALF, %ecx
|
|
# else
|
|
# ifdef PIC
|
|
SETUP_PIC_REG(bx)
|
|
add $_GLOBAL_OFFSET_TABLE_, %ebx
|
|
cmp __x86_shared_cache_size_half@GOTOFF(%ebx), %ecx
|
|
# else
|
|
cmp __x86_shared_cache_size_half, %ecx
|
|
# endif
|
|
# endif
|
|
jae L(large_page)
|
|
|
|
movdqu (%eax), %xmm0
|
|
movdqu -16(%eax, %ecx), %xmm1
|
|
cmpl $32, %ecx
|
|
movdqu %xmm0, (%edx)
|
|
movdqu %xmm1, -16(%edx, %ecx)
|
|
jbe L(return)
|
|
|
|
movdqu 16(%eax), %xmm0
|
|
movdqu -32(%eax, %ecx), %xmm1
|
|
cmpl $64, %ecx
|
|
movdqu %xmm0, 16(%edx)
|
|
movdqu %xmm1, -32(%edx, %ecx)
|
|
jbe L(return)
|
|
|
|
movdqu 32(%eax), %xmm0
|
|
movdqu 48(%eax), %xmm1
|
|
movdqu -48(%eax, %ecx), %xmm2
|
|
movdqu -64(%eax, %ecx), %xmm3
|
|
cmpl $128, %ecx
|
|
movdqu %xmm0, 32(%edx)
|
|
movdqu %xmm1, 48(%edx)
|
|
movdqu %xmm2, -48(%edx, %ecx)
|
|
movdqu %xmm3, -64(%edx, %ecx)
|
|
jbe L(return)
|
|
|
|
/* Now the main loop: we align the address of the destination. */
|
|
leal 64(%edx), %ebx
|
|
andl $-64, %ebx
|
|
|
|
addl %edx, %ecx
|
|
andl $-64, %ecx
|
|
|
|
subl %edx, %eax
|
|
|
|
/* We should stop two iterations before the termination
|
|
(in order not to misprefetch). */
|
|
subl $64, %ecx
|
|
cmpl %ebx, %ecx
|
|
je L(main_loop_just_one_iteration)
|
|
|
|
subl $64, %ecx
|
|
cmpl %ebx, %ecx
|
|
je L(main_loop_last_two_iterations)
|
|
|
|
.p2align 4
|
|
L(main_loop_cache):
|
|
|
|
prefetcht0 128(%ebx, %eax)
|
|
|
|
movdqu (%ebx, %eax), %xmm0
|
|
movdqu 16(%ebx, %eax), %xmm1
|
|
movdqu 32(%ebx, %eax), %xmm2
|
|
movdqu 48(%ebx, %eax), %xmm3
|
|
movdqa %xmm0, (%ebx)
|
|
movaps %xmm1, 16(%ebx)
|
|
movaps %xmm2, 32(%ebx)
|
|
movaps %xmm3, 48(%ebx)
|
|
lea 64(%ebx), %ebx
|
|
cmpl %ebx, %ecx
|
|
jne L(main_loop_cache)
|
|
|
|
L(main_loop_last_two_iterations):
|
|
movdqu (%ebx, %eax), %xmm0
|
|
movdqu 16(%ebx, %eax), %xmm1
|
|
movdqu 32(%ebx, %eax), %xmm2
|
|
movdqu 48(%ebx, %eax), %xmm3
|
|
movdqu 64(%ebx, %eax), %xmm4
|
|
movdqu 80(%ebx, %eax), %xmm5
|
|
movdqu 96(%ebx, %eax), %xmm6
|
|
movdqu 112(%ebx, %eax), %xmm7
|
|
movdqa %xmm0, (%ebx)
|
|
movaps %xmm1, 16(%ebx)
|
|
movaps %xmm2, 32(%ebx)
|
|
movaps %xmm3, 48(%ebx)
|
|
movaps %xmm4, 64(%ebx)
|
|
movaps %xmm5, 80(%ebx)
|
|
movaps %xmm6, 96(%ebx)
|
|
movaps %xmm7, 112(%ebx)
|
|
jmp L(return)
|
|
|
|
L(main_loop_just_one_iteration):
|
|
movdqu (%ebx, %eax), %xmm0
|
|
movdqu 16(%ebx, %eax), %xmm1
|
|
movdqu 32(%ebx, %eax), %xmm2
|
|
movdqu 48(%ebx, %eax), %xmm3
|
|
movdqa %xmm0, (%ebx)
|
|
movaps %xmm1, 16(%ebx)
|
|
movaps %xmm2, 32(%ebx)
|
|
movaps %xmm3, 48(%ebx)
|
|
jmp L(return)
|
|
|
|
L(large_page):
|
|
movdqu (%eax), %xmm0
|
|
movdqu 16(%eax), %xmm1
|
|
movdqu 32(%eax), %xmm2
|
|
movdqu 48(%eax), %xmm3
|
|
movdqu -64(%eax, %ecx), %xmm4
|
|
movdqu -48(%eax, %ecx), %xmm5
|
|
movdqu -32(%eax, %ecx), %xmm6
|
|
movdqu -16(%eax, %ecx), %xmm7
|
|
movdqu %xmm0, (%edx)
|
|
movdqu %xmm1, 16(%edx)
|
|
movdqu %xmm2, 32(%edx)
|
|
movdqu %xmm3, 48(%edx)
|
|
movdqu %xmm4, -64(%edx, %ecx)
|
|
movdqu %xmm5, -48(%edx, %ecx)
|
|
movdqu %xmm6, -32(%edx, %ecx)
|
|
movdqu %xmm7, -16(%edx, %ecx)
|
|
|
|
movdqu 64(%eax), %xmm0
|
|
movdqu 80(%eax), %xmm1
|
|
movdqu 96(%eax), %xmm2
|
|
movdqu 112(%eax), %xmm3
|
|
movdqu -128(%eax, %ecx), %xmm4
|
|
movdqu -112(%eax, %ecx), %xmm5
|
|
movdqu -96(%eax, %ecx), %xmm6
|
|
movdqu -80(%eax, %ecx), %xmm7
|
|
movdqu %xmm0, 64(%edx)
|
|
movdqu %xmm1, 80(%edx)
|
|
movdqu %xmm2, 96(%edx)
|
|
movdqu %xmm3, 112(%edx)
|
|
movdqu %xmm4, -128(%edx, %ecx)
|
|
movdqu %xmm5, -112(%edx, %ecx)
|
|
movdqu %xmm6, -96(%edx, %ecx)
|
|
movdqu %xmm7, -80(%edx, %ecx)
|
|
|
|
/* Now the main loop with non temporal stores. We align
|
|
the address of the destination. */
|
|
leal 128(%edx), %ebx
|
|
andl $-128, %ebx
|
|
|
|
addl %edx, %ecx
|
|
andl $-128, %ecx
|
|
|
|
subl %edx, %eax
|
|
|
|
.p2align 4
|
|
L(main_loop_large_page):
|
|
movdqu (%ebx, %eax), %xmm0
|
|
movdqu 16(%ebx, %eax), %xmm1
|
|
movdqu 32(%ebx, %eax), %xmm2
|
|
movdqu 48(%ebx, %eax), %xmm3
|
|
movdqu 64(%ebx, %eax), %xmm4
|
|
movdqu 80(%ebx, %eax), %xmm5
|
|
movdqu 96(%ebx, %eax), %xmm6
|
|
movdqu 112(%ebx, %eax), %xmm7
|
|
movntdq %xmm0, (%ebx)
|
|
movntdq %xmm1, 16(%ebx)
|
|
movntdq %xmm2, 32(%ebx)
|
|
movntdq %xmm3, 48(%ebx)
|
|
movntdq %xmm4, 64(%ebx)
|
|
movntdq %xmm5, 80(%ebx)
|
|
movntdq %xmm6, 96(%ebx)
|
|
movntdq %xmm7, 112(%ebx)
|
|
lea 128(%ebx), %ebx
|
|
cmpl %ebx, %ecx
|
|
jne L(main_loop_large_page)
|
|
sfence
|
|
jmp L(return)
|
|
|
|
L(len_0_16_bytes):
|
|
testb $24, %cl
|
|
jne L(len_9_16_bytes)
|
|
testb $4, %cl
|
|
.p2align 4,,5
|
|
jne L(len_5_8_bytes)
|
|
testl %ecx, %ecx
|
|
.p2align 4,,2
|
|
je L(return)
|
|
movzbl (%eax), %ebx
|
|
testb $2, %cl
|
|
movb %bl, (%edx)
|
|
je L(return)
|
|
movzwl -2(%eax,%ecx), %ebx
|
|
movw %bx, -2(%edx,%ecx)
|
|
jmp L(return)
|
|
|
|
L(len_9_16_bytes):
|
|
movq (%eax), %xmm0
|
|
movq -8(%eax, %ecx), %xmm1
|
|
movq %xmm0, (%edx)
|
|
movq %xmm1, -8(%edx, %ecx)
|
|
jmp L(return)
|
|
|
|
L(len_5_8_bytes):
|
|
movl (%eax), %ebx
|
|
movl %ebx, (%edx)
|
|
movl -4(%eax,%ecx), %ebx
|
|
movl %ebx, -4(%edx,%ecx)
|
|
|
|
L(return):
|
|
movl %edx, %eax
|
|
# if !defined USE_AS_BCOPY && defined USE_AS_MEMPCPY
|
|
movl LEN(%esp), %ecx
|
|
add %ecx, %eax
|
|
# endif
|
|
RETURN
|
|
|
|
END (MEMCPY)
|
|
#endif
|