bionic/x86: Optimization for string routines
Optimized strcpy, strcat,
strncpy, strncat, strlcpy, strlcat,
memchr, memrchr, strchr, strrchr, index,
strnlen, strlen, wcslen, wmemcmp, wcscmp,
wcschr, wcsrchr, wcscpy, wcscat
Change-Id: I82b29132edf9a2e144e0bb3ee4ff5217df8d2a6d
Signed-off-by: Liubov Dmitrieva <liubov.dmitrieva@intel.com>
diff --git a/libc/arch-x86/string/sse2-wcscmp-atom.S b/libc/arch-x86/string/sse2-wcscmp-atom.S
new file mode 100644
index 0000000..8867d28
--- /dev/null
+++ b/libc/arch-x86/string/sse2-wcscmp-atom.S
@@ -0,0 +1,1062 @@
+/*
+Copyright (c) 2011 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.
+*/
+
+#ifndef L
+# define L(label) .L##label
+#endif
+
+#ifndef cfi_startproc
+# define cfi_startproc .cfi_startproc
+#endif
+
+#ifndef cfi_endproc
+# define cfi_endproc .cfi_endproc
+#endif
+
+#ifndef cfi_rel_offset
+# define cfi_rel_offset(reg, off) .cfi_rel_offset reg, off
+#endif
+
+#ifndef cfi_restore
+# define cfi_restore(reg) .cfi_restore reg
+#endif
+
+#ifndef cfi_adjust_cfa_offset
+# define cfi_adjust_cfa_offset(off) .cfi_adjust_cfa_offset off
+#endif
+
+#ifndef ENTRY
+# define ENTRY(name) \
+ .type name, @function; \
+ .globl name; \
+ .p2align 4; \
+name: \
+ cfi_startproc
+#endif
+
+#ifndef END
+# define END(name) \
+ cfi_endproc; \
+ .size name, .-name
+#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 ENTRANCE PUSH(%esi); PUSH(%edi)
+#define RETURN POP(%edi); POP(%esi); ret; CFI_PUSH(%esi); CFI_PUSH(%edi);
+#define PARMS 4
+#define STR1 PARMS
+#define STR2 STR1+4
+
+ .text
+ENTRY (wcscmp)
+/*
+ * This implementation uses SSE to compare up to 16 bytes at a time.
+*/
+ mov STR1(%esp), %edx
+ mov STR2(%esp), %eax
+
+ mov (%eax), %ecx
+ cmp %ecx, (%edx)
+ jne L(neq)
+ test %ecx, %ecx
+ jz L(eq)
+
+ mov 4(%eax), %ecx
+ cmp %ecx, 4(%edx)
+ jne L(neq)
+ test %ecx, %ecx
+ jz L(eq)
+
+ mov 8(%eax), %ecx
+ cmp %ecx, 8(%edx)
+ jne L(neq)
+ test %ecx, %ecx
+ jz L(eq)
+
+ mov 12(%eax), %ecx
+ cmp %ecx, 12(%edx)
+ jne L(neq)
+ test %ecx, %ecx
+ jz L(eq)
+
+ ENTRANCE
+ add $16, %eax
+ add $16, %edx
+
+ mov %eax, %esi
+ mov %edx, %edi
+ pxor %xmm0, %xmm0 /* clear %xmm0 for null char checks */
+ mov %al, %ch
+ mov %dl, %cl
+ and $63, %eax /* esi alignment in cache line */
+ and $63, %edx /* edi alignment in cache line */
+ and $15, %cl
+ jz L(continue_00)
+ cmp $16, %edx
+ jb L(continue_0)
+ cmp $32, %edx
+ jb L(continue_16)
+ cmp $48, %edx
+ jb L(continue_32)
+
+L(continue_48):
+ and $15, %ch
+ jz L(continue_48_00)
+ cmp $16, %eax
+ jb L(continue_0_48)
+ cmp $32, %eax
+ jb L(continue_16_48)
+ cmp $48, %eax
+ jb L(continue_32_48)
+
+ .p2align 4
+L(continue_48_48):
+ mov (%esi), %ecx
+ cmp %ecx, (%edi)
+ jne L(nequal)
+ test %ecx, %ecx
+ jz L(equal)
+
+ mov 4(%esi), %ecx
+ cmp %ecx, 4(%edi)
+ jne L(nequal)
+ test %ecx, %ecx
+ jz L(equal)
+
+ mov 8(%esi), %ecx
+ cmp %ecx, 8(%edi)
+ jne L(nequal)
+ test %ecx, %ecx
+ jz L(equal)
+
+ mov 12(%esi), %ecx
+ cmp %ecx, 12(%edi)
+ jne L(nequal)
+ test %ecx, %ecx
+ jz L(equal)
+
+ movdqu 16(%edi), %xmm1
+ movdqu 16(%esi), %xmm2
+ pcmpeqd %xmm1, %xmm0 /* Any null double_word? */
+ pcmpeqd %xmm2, %xmm1 /* compare first 4 double_words for equality */
+ psubb %xmm0, %xmm1 /* packed sub of comparison results*/
+ pmovmskb %xmm1, %edx
+ sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
+ jnz L(less4_double_words_16)
+
+ movdqu 32(%edi), %xmm1
+ movdqu 32(%esi), %xmm2
+ pcmpeqd %xmm1, %xmm0 /* Any null double_word? */
+ pcmpeqd %xmm2, %xmm1 /* compare first 4 double_words for equality */
+ psubb %xmm0, %xmm1 /* packed sub of comparison results*/
+ pmovmskb %xmm1, %edx
+ sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
+ jnz L(less4_double_words_32)
+
+ movdqu 48(%edi), %xmm1
+ movdqu 48(%esi), %xmm2
+ pcmpeqd %xmm1, %xmm0 /* Any null double_word? */
+ pcmpeqd %xmm2, %xmm1 /* compare first 4 double_words for equality */
+ psubb %xmm0, %xmm1 /* packed sub of comparison results*/
+ pmovmskb %xmm1, %edx
+ sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
+ jnz L(less4_double_words_48)
+
+ add $64, %esi
+ add $64, %edi
+ jmp L(continue_48_48)
+
+L(continue_0):
+ and $15, %ch
+ jz L(continue_0_00)
+ cmp $16, %eax
+ jb L(continue_0_0)
+ cmp $32, %eax
+ jb L(continue_0_16)
+ cmp $48, %eax
+ jb L(continue_0_32)
+
+ .p2align 4
+L(continue_0_48):
+ mov (%esi), %ecx
+ cmp %ecx, (%edi)
+ jne L(nequal)
+ test %ecx, %ecx
+ jz L(equal)
+
+ mov 4(%esi), %ecx
+ cmp %ecx, 4(%edi)
+ jne L(nequal)
+ test %ecx, %ecx
+ jz L(equal)
+
+ mov 8(%esi), %ecx
+ cmp %ecx, 8(%edi)
+ jne L(nequal)
+ test %ecx, %ecx
+ jz L(equal)
+
+ mov 12(%esi), %ecx
+ cmp %ecx, 12(%edi)
+ jne L(nequal)
+ test %ecx, %ecx
+ jz L(equal)
+
+ movdqu 16(%edi), %xmm1
+ movdqu 16(%esi), %xmm2
+ pcmpeqd %xmm1, %xmm0 /* Any null double_word? */
+ pcmpeqd %xmm2, %xmm1 /* compare first 4 double_words for equality */
+ psubb %xmm0, %xmm1 /* packed sub of comparison results*/
+ pmovmskb %xmm1, %edx
+ sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
+ jnz L(less4_double_words_16)
+
+ movdqu 32(%edi), %xmm1
+ movdqu 32(%esi), %xmm2
+ pcmpeqd %xmm1, %xmm0 /* Any null double_word? */
+ pcmpeqd %xmm2, %xmm1 /* compare first 4 double_words for equality */
+ psubb %xmm0, %xmm1 /* packed sub of comparison results*/
+ pmovmskb %xmm1, %edx
+ sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
+ jnz L(less4_double_words_32)
+
+ mov 48(%esi), %ecx
+ cmp %ecx, 48(%edi)
+ jne L(nequal)
+ test %ecx, %ecx
+ jz L(equal)
+
+ mov 52(%esi), %ecx
+ cmp %ecx, 52(%edi)
+ jne L(nequal)
+ test %ecx, %ecx
+ jz L(equal)
+
+ mov 56(%esi), %ecx
+ cmp %ecx, 56(%edi)
+ jne L(nequal)
+ test %ecx, %ecx
+ jz L(equal)
+
+ mov 60(%esi), %ecx
+ cmp %ecx, 60(%edi)
+ jne L(nequal)
+ test %ecx, %ecx
+ jz L(equal)
+
+ add $64, %esi
+ add $64, %edi
+ jmp L(continue_0_48)
+
+ .p2align 4
+L(continue_00):
+ and $15, %ch
+ jz L(continue_00_00)
+ cmp $16, %eax
+ jb L(continue_00_0)
+ cmp $32, %eax
+ jb L(continue_00_16)
+ cmp $48, %eax
+ jb L(continue_00_32)
+
+ .p2align 4
+L(continue_00_48):
+ pcmpeqd (%edi), %xmm0
+ mov (%edi), %eax
+ pmovmskb %xmm0, %ecx
+ test %ecx, %ecx
+ jnz L(less4_double_words1)
+
+ cmp (%esi), %eax
+ jne L(nequal)
+
+ mov 4(%edi), %eax
+ cmp 4(%esi), %eax
+ jne L(nequal)
+
+ mov 8(%edi), %eax
+ cmp 8(%esi), %eax
+ jne L(nequal)
+
+ mov 12(%edi), %eax
+ cmp 12(%esi), %eax
+ jne L(nequal)
+
+ movdqu 16(%esi), %xmm2
+ pcmpeqd %xmm2, %xmm0 /* Any null double_word? */
+ pcmpeqd 16(%edi), %xmm2 /* compare first 4 double_words for equality */
+ psubb %xmm0, %xmm2 /* packed sub of comparison results*/
+ pmovmskb %xmm2, %edx
+ sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
+ jnz L(less4_double_words_16)
+
+ movdqu 32(%esi), %xmm2
+ pcmpeqd %xmm2, %xmm0 /* Any null double_word? */
+ pcmpeqd 32(%edi), %xmm2 /* compare first 4 double_words for equality */
+ psubb %xmm0, %xmm2 /* packed sub of comparison results*/
+ pmovmskb %xmm2, %edx
+ sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
+ jnz L(less4_double_words_32)
+
+ movdqu 48(%esi), %xmm2
+ pcmpeqd %xmm2, %xmm0 /* Any null double_word? */
+ pcmpeqd 48(%edi), %xmm2 /* compare first 4 double_words for equality */
+ psubb %xmm0, %xmm2 /* packed sub of comparison results*/
+ pmovmskb %xmm2, %edx
+ sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
+ jnz L(less4_double_words_48)
+
+ add $64, %esi
+ add $64, %edi
+ jmp L(continue_00_48)
+
+ .p2align 4
+L(continue_32):
+ and $15, %ch
+ jz L(continue_32_00)
+ cmp $16, %eax
+ jb L(continue_0_32)
+ cmp $32, %eax
+ jb L(continue_16_32)
+ cmp $48, %eax
+ jb L(continue_32_32)
+
+ .p2align 4
+L(continue_32_48):
+ mov (%esi), %ecx
+ cmp %ecx, (%edi)
+ jne L(nequal)
+ test %ecx, %ecx
+ jz L(equal)
+
+ mov 4(%esi), %ecx
+ cmp %ecx, 4(%edi)
+ jne L(nequal)
+ test %ecx, %ecx
+ jz L(equal)
+
+ mov 8(%esi), %ecx
+ cmp %ecx, 8(%edi)
+ jne L(nequal)
+ test %ecx, %ecx
+ jz L(equal)
+
+ mov 12(%esi), %ecx
+ cmp %ecx, 12(%edi)
+ jne L(nequal)
+ test %ecx, %ecx
+ jz L(equal)
+
+ mov 16(%esi), %ecx
+ cmp %ecx, 16(%edi)
+ jne L(nequal)
+ test %ecx, %ecx
+ jz L(equal)
+
+ mov 20(%esi), %ecx
+ cmp %ecx, 20(%edi)
+ jne L(nequal)
+ test %ecx, %ecx
+ jz L(equal)
+
+ mov 24(%esi), %ecx
+ cmp %ecx, 24(%edi)
+ jne L(nequal)
+ test %ecx, %ecx
+ jz L(equal)
+
+ mov 28(%esi), %ecx
+ cmp %ecx, 28(%edi)
+ jne L(nequal)
+ test %ecx, %ecx
+ jz L(equal)
+
+ movdqu 32(%edi), %xmm1
+ movdqu 32(%esi), %xmm2
+ pcmpeqd %xmm1, %xmm0 /* Any null double_word? */
+ pcmpeqd %xmm2, %xmm1 /* compare first 4 double_words for equality */
+ psubb %xmm0, %xmm1 /* packed sub of comparison results*/
+ pmovmskb %xmm1, %edx
+ sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
+ jnz L(less4_double_words_32)
+
+ movdqu 48(%edi), %xmm1
+ movdqu 48(%esi), %xmm2
+ pcmpeqd %xmm1, %xmm0 /* Any null double_word? */
+ pcmpeqd %xmm2, %xmm1 /* compare first 4 double_words for equality */
+ psubb %xmm0, %xmm1 /* packed sub of comparison results*/
+ pmovmskb %xmm1, %edx
+ sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
+ jnz L(less4_double_words_48)
+
+ add $64, %esi
+ add $64, %edi
+ jmp L(continue_32_48)
+
+ .p2align 4
+L(continue_16):
+ and $15, %ch
+ jz L(continue_16_00)
+ cmp $16, %eax
+ jb L(continue_0_16)
+ cmp $32, %eax
+ jb L(continue_16_16)
+ cmp $48, %eax
+ jb L(continue_16_32)
+
+ .p2align 4
+L(continue_16_48):
+ mov (%esi), %ecx
+ cmp %ecx, (%edi)
+ jne L(nequal)
+ test %ecx, %ecx
+ jz L(equal)
+
+ mov 4(%esi), %ecx
+ cmp %ecx, 4(%edi)
+ jne L(nequal)
+ test %ecx, %ecx
+ jz L(equal)
+
+ mov 8(%esi), %ecx
+ cmp %ecx, 8(%edi)
+ jne L(nequal)
+ test %ecx, %ecx
+ jz L(equal)
+
+ mov 12(%esi), %ecx
+ cmp %ecx, 12(%edi)
+ jne L(nequal)
+ test %ecx, %ecx
+ jz L(equal)
+
+ movdqu 16(%edi), %xmm1
+ movdqu 16(%esi), %xmm2
+ pcmpeqd %xmm1, %xmm0 /* Any null double_word? */
+ pcmpeqd %xmm2, %xmm1 /* compare first 4 double_words for equality */
+ psubb %xmm0, %xmm1 /* packed sub of comparison results*/
+ pmovmskb %xmm1, %edx
+ sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
+ jnz L(less4_double_words_16)
+
+ mov 32(%esi), %ecx
+ cmp %ecx, 32(%edi)
+ jne L(nequal)
+ test %ecx, %ecx
+ jz L(equal)
+
+ mov 36(%esi), %ecx
+ cmp %ecx, 36(%edi)
+ jne L(nequal)
+ test %ecx, %ecx
+ jz L(equal)
+
+ mov 40(%esi), %ecx
+ cmp %ecx, 40(%edi)
+ jne L(nequal)
+ test %ecx, %ecx
+ jz L(equal)
+
+ mov 44(%esi), %ecx
+ cmp %ecx, 44(%edi)
+ jne L(nequal)
+ test %ecx, %ecx
+ jz L(equal)
+
+ movdqu 48(%edi), %xmm1
+ movdqu 48(%esi), %xmm2
+ pcmpeqd %xmm1, %xmm0 /* Any null double_word? */
+ pcmpeqd %xmm2, %xmm1 /* compare first 4 double_words for equality */
+ psubb %xmm0, %xmm1 /* packed sub of comparison results*/
+ pmovmskb %xmm1, %edx
+ sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
+ jnz L(less4_double_words_48)
+
+ add $64, %esi
+ add $64, %edi
+ jmp L(continue_16_48)
+
+ .p2align 4
+L(continue_00_00):
+ movdqa (%edi), %xmm1
+ pcmpeqd %xmm1, %xmm0 /* Any null double_word? */
+ pcmpeqd (%esi), %xmm1 /* compare first 4 double_words for equality */
+ psubb %xmm0, %xmm1 /* packed sub of comparison results*/
+ pmovmskb %xmm1, %edx
+ sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
+ jnz L(less4_double_words)
+
+ movdqa 16(%edi), %xmm3
+ pcmpeqd %xmm3, %xmm0 /* Any null double_word? */
+ pcmpeqd 16(%esi), %xmm3 /* compare first 4 double_words for equality */
+ psubb %xmm0, %xmm3 /* packed sub of comparison results*/
+ pmovmskb %xmm3, %edx
+ sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
+ jnz L(less4_double_words_16)
+
+ movdqa 32(%edi), %xmm5
+ pcmpeqd %xmm5, %xmm0 /* Any null double_word? */
+ pcmpeqd 32(%esi), %xmm5 /* compare first 4 double_words for equality */
+ psubb %xmm0, %xmm5 /* packed sub of comparison results*/
+ pmovmskb %xmm5, %edx
+ sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
+ jnz L(less4_double_words_32)
+
+ movdqa 48(%edi), %xmm1
+ pcmpeqd %xmm1, %xmm0 /* Any null double_word? */
+ pcmpeqd 48(%esi), %xmm1 /* compare first 4 double_words for equality */
+ psubb %xmm0, %xmm1 /* packed sub of comparison results*/
+ pmovmskb %xmm1, %edx
+ sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
+ jnz L(less4_double_words_48)
+
+ add $64, %esi
+ add $64, %edi
+ jmp L(continue_00_00)
+
+ .p2align 4
+L(continue_00_32):
+ movdqu (%esi), %xmm2
+ pcmpeqd %xmm2, %xmm0 /* Any null double_word? */
+ pcmpeqd (%edi), %xmm2 /* compare first 4 double_words for equality */
+ psubb %xmm0, %xmm2 /* packed sub of comparison results*/
+ pmovmskb %xmm2, %edx
+ sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
+ jnz L(less4_double_words)
+
+ add $16, %esi
+ add $16, %edi
+ jmp L(continue_00_48)
+
+ .p2align 4
+L(continue_00_16):
+ movdqu (%esi), %xmm2
+ pcmpeqd %xmm2, %xmm0 /* Any null double_word? */
+ pcmpeqd (%edi), %xmm2 /* compare first 4 double_words for equality */
+ psubb %xmm0, %xmm2 /* packed sub of comparison results*/
+ pmovmskb %xmm2, %edx
+ sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
+ jnz L(less4_double_words)
+
+ movdqu 16(%esi), %xmm2
+ pcmpeqd %xmm2, %xmm0 /* Any null double_word? */
+ pcmpeqd 16(%edi), %xmm2 /* compare first 4 double_words for equality */
+ psubb %xmm0, %xmm2 /* packed sub of comparison results*/
+ pmovmskb %xmm2, %edx
+ sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
+ jnz L(less4_double_words_16)
+
+ add $32, %esi
+ add $32, %edi
+ jmp L(continue_00_48)
+
+ .p2align 4
+L(continue_00_0):
+ movdqu (%esi), %xmm2
+ pcmpeqd %xmm2, %xmm0 /* Any null double_word? */
+ pcmpeqd (%edi), %xmm2 /* compare first 4 double_words for equality */
+ psubb %xmm0, %xmm2 /* packed sub of comparison results*/
+ pmovmskb %xmm2, %edx
+ sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
+ jnz L(less4_double_words)
+
+ movdqu 16(%esi), %xmm2
+ pcmpeqd %xmm2, %xmm0 /* Any null double_word? */
+ pcmpeqd 16(%edi), %xmm2 /* compare first 4 double_words for equality */
+ psubb %xmm0, %xmm2 /* packed sub of comparison results*/
+ pmovmskb %xmm2, %edx
+ sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
+ jnz L(less4_double_words_16)
+
+ movdqu 32(%esi), %xmm2
+ pcmpeqd %xmm2, %xmm0 /* Any null double_word? */
+ pcmpeqd 32(%edi), %xmm2 /* compare first 4 double_words for equality */
+ psubb %xmm0, %xmm2 /* packed sub of comparison results*/
+ pmovmskb %xmm2, %edx
+ sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
+ jnz L(less4_double_words_32)
+
+ add $48, %esi
+ add $48, %edi
+ jmp L(continue_00_48)
+
+ .p2align 4
+L(continue_48_00):
+ pcmpeqd (%esi), %xmm0
+ mov (%edi), %eax
+ pmovmskb %xmm0, %ecx
+ test %ecx, %ecx
+ jnz L(less4_double_words1)
+
+ cmp (%esi), %eax
+ jne L(nequal)
+
+ mov 4(%edi), %eax
+ cmp 4(%esi), %eax
+ jne L(nequal)
+
+ mov 8(%edi), %eax
+ cmp 8(%esi), %eax
+ jne L(nequal)
+
+ mov 12(%edi), %eax
+ cmp 12(%esi), %eax
+ jne L(nequal)
+
+ movdqu 16(%edi), %xmm1
+ pcmpeqd %xmm1, %xmm0 /* Any null double_word? */
+ pcmpeqd 16(%esi), %xmm1 /* compare first 4 double_words for equality */
+ psubb %xmm0, %xmm1 /* packed sub of comparison results*/
+ pmovmskb %xmm1, %edx
+ sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
+ jnz L(less4_double_words_16)
+
+ movdqu 32(%edi), %xmm1
+ pcmpeqd %xmm1, %xmm0 /* Any null double_word? */
+ pcmpeqd 32(%esi), %xmm1 /* compare first 4 double_words for equality */
+ psubb %xmm0, %xmm1 /* packed sub of comparison results*/
+ pmovmskb %xmm1, %edx
+ sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
+ jnz L(less4_double_words_32)
+
+ movdqu 48(%edi), %xmm1
+ pcmpeqd %xmm1, %xmm0 /* Any null double_word? */
+ pcmpeqd 48(%esi), %xmm1 /* compare first 4 double_words for equality */
+ psubb %xmm0, %xmm1 /* packed sub of comparison results*/
+ pmovmskb %xmm1, %edx
+ sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
+ jnz L(less4_double_words_48)
+
+ add $64, %esi
+ add $64, %edi
+ jmp L(continue_48_00)
+
+ .p2align 4
+L(continue_32_00):
+ movdqu (%edi), %xmm1
+ pcmpeqd %xmm1, %xmm0 /* Any null double_word? */
+ pcmpeqd (%esi), %xmm1 /* compare first 4 double_words for equality */
+ psubb %xmm0, %xmm1 /* packed sub of comparison results*/
+ pmovmskb %xmm1, %edx
+ sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
+ jnz L(less4_double_words)
+
+ add $16, %esi
+ add $16, %edi
+ jmp L(continue_48_00)
+
+ .p2align 4
+L(continue_16_00):
+ movdqu (%edi), %xmm1
+ pcmpeqd %xmm1, %xmm0 /* Any null double_word? */
+ pcmpeqd (%esi), %xmm1 /* compare first 4 double_words for equality */
+ psubb %xmm0, %xmm1 /* packed sub of comparison results*/
+ pmovmskb %xmm1, %edx
+ sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
+ jnz L(less4_double_words)
+
+ movdqu 16(%edi), %xmm1
+ pcmpeqd %xmm1, %xmm0 /* Any null double_word? */
+ pcmpeqd 16(%esi), %xmm1 /* compare first 4 double_words for equality */
+ psubb %xmm0, %xmm1 /* packed sub of comparison results*/
+ pmovmskb %xmm1, %edx
+ sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
+ jnz L(less4_double_words_16)
+
+ add $32, %esi
+ add $32, %edi
+ jmp L(continue_48_00)
+
+ .p2align 4
+L(continue_0_00):
+ movdqu (%edi), %xmm1
+ pcmpeqd %xmm1, %xmm0 /* Any null double_word? */
+ pcmpeqd (%esi), %xmm1 /* compare first 4 double_words for equality */
+ psubb %xmm0, %xmm1 /* packed sub of comparison results*/
+ pmovmskb %xmm1, %edx
+ sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
+ jnz L(less4_double_words)
+
+ movdqu 16(%edi), %xmm1
+ pcmpeqd %xmm1, %xmm0 /* Any null double_word? */
+ pcmpeqd 16(%esi), %xmm1 /* compare first 4 double_words for equality */
+ psubb %xmm0, %xmm1 /* packed sub of comparison results*/
+ pmovmskb %xmm1, %edx
+ sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
+ jnz L(less4_double_words_16)
+
+ movdqu 32(%edi), %xmm1
+ pcmpeqd %xmm1, %xmm0 /* Any null double_word? */
+ pcmpeqd 32(%esi), %xmm1 /* compare first 4 double_words for equality */
+ psubb %xmm0, %xmm1 /* packed sub of comparison results*/
+ pmovmskb %xmm1, %edx
+ sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
+ jnz L(less4_double_words_32)
+
+ add $48, %esi
+ add $48, %edi
+ jmp L(continue_48_00)
+
+ .p2align 4
+L(continue_32_32):
+ movdqu (%edi), %xmm1
+ movdqu (%esi), %xmm2
+ pcmpeqd %xmm1, %xmm0 /* Any null double_word? */
+ pcmpeqd %xmm2, %xmm1 /* compare first 4 double_words for equality */
+ psubb %xmm0, %xmm1 /* packed sub of comparison results*/
+ pmovmskb %xmm1, %edx
+ sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
+ jnz L(less4_double_words)
+
+ add $16, %esi
+ add $16, %edi
+ jmp L(continue_48_48)
+
+ .p2align 4
+L(continue_16_16):
+ movdqu (%edi), %xmm1
+ movdqu (%esi), %xmm2
+ pcmpeqd %xmm1, %xmm0 /* Any null double_word? */
+ pcmpeqd %xmm2, %xmm1 /* compare first 4 double_words for equality */
+ psubb %xmm0, %xmm1 /* packed sub of comparison results*/
+ pmovmskb %xmm1, %edx
+ sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
+ jnz L(less4_double_words)
+
+ movdqu 16(%edi), %xmm3
+ movdqu 16(%esi), %xmm4
+ pcmpeqd %xmm3, %xmm0 /* Any null double_word? */
+ pcmpeqd %xmm4, %xmm3 /* compare first 4 double_words for equality */
+ psubb %xmm0, %xmm3 /* packed sub of comparison results*/
+ pmovmskb %xmm3, %edx
+ sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
+ jnz L(less4_double_words_16)
+
+ add $32, %esi
+ add $32, %edi
+ jmp L(continue_48_48)
+
+ .p2align 4
+L(continue_0_0):
+ movdqu (%edi), %xmm1
+ movdqu (%esi), %xmm2
+ pcmpeqd %xmm1, %xmm0 /* Any null double_word? */
+ pcmpeqd %xmm2, %xmm1 /* compare first 4 double_words for equality */
+ psubb %xmm0, %xmm1 /* packed sub of comparison results*/
+ pmovmskb %xmm1, %edx
+ sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
+ jnz L(less4_double_words)
+
+ movdqu 16(%edi), %xmm3
+ movdqu 16(%esi), %xmm4
+ pcmpeqd %xmm3, %xmm0 /* Any null double_word? */
+ pcmpeqd %xmm4, %xmm3 /* compare first 4 double_words for equality */
+ psubb %xmm0, %xmm3 /* packed sub of comparison results*/
+ pmovmskb %xmm3, %edx
+ sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
+ jnz L(less4_double_words_16)
+
+ movdqu 32(%edi), %xmm1
+ movdqu 32(%esi), %xmm2
+ pcmpeqd %xmm1, %xmm0 /* Any null double_word? */
+ pcmpeqd %xmm2, %xmm1 /* compare first 4 double_words for equality */
+ psubb %xmm0, %xmm1 /* packed sub of comparison results*/
+ pmovmskb %xmm1, %edx
+ sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
+ jnz L(less4_double_words_32)
+
+ add $48, %esi
+ add $48, %edi
+ jmp L(continue_48_48)
+
+ .p2align 4
+L(continue_0_16):
+ movdqu (%edi), %xmm1
+ movdqu (%esi), %xmm2
+ pcmpeqd %xmm1, %xmm0 /* Any null double_word? */
+ pcmpeqd %xmm2, %xmm1 /* compare first 4 double_words for equality */
+ psubb %xmm0, %xmm1 /* packed sub of comparison results*/
+ pmovmskb %xmm1, %edx
+ sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
+ jnz L(less4_double_words)
+
+ movdqu 16(%edi), %xmm1
+ movdqu 16(%esi), %xmm2
+ pcmpeqd %xmm1, %xmm0 /* Any null double_word? */
+ pcmpeqd %xmm2, %xmm1 /* compare first 4 double_words for equality */
+ psubb %xmm0, %xmm1 /* packed sub of comparison results*/
+ pmovmskb %xmm1, %edx
+ sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
+ jnz L(less4_double_words_16)
+
+ add $32, %esi
+ add $32, %edi
+ jmp L(continue_32_48)
+
+ .p2align 4
+L(continue_0_32):
+ movdqu (%edi), %xmm1
+ movdqu (%esi), %xmm2
+ pcmpeqd %xmm1, %xmm0 /* Any null double_word? */
+ pcmpeqd %xmm2, %xmm1 /* compare first 4 double_words for equality */
+ psubb %xmm0, %xmm1 /* packed sub of comparison results*/
+ pmovmskb %xmm1, %edx
+ sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
+ jnz L(less4_double_words)
+
+ add $16, %esi
+ add $16, %edi
+ jmp L(continue_16_48)
+
+ .p2align 4
+L(continue_16_32):
+ movdqu (%edi), %xmm1
+ movdqu (%esi), %xmm2
+ pcmpeqd %xmm1, %xmm0 /* Any null double_word? */
+ pcmpeqd %xmm2, %xmm1 /* compare first 4 double_words for equality */
+ psubb %xmm0, %xmm1 /* packed sub of comparison results*/
+ pmovmskb %xmm1, %edx
+ sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
+ jnz L(less4_double_words)
+
+ add $16, %esi
+ add $16, %edi
+ jmp L(continue_32_48)
+
+ .p2align 4
+L(less4_double_words1):
+ cmp (%esi), %eax
+ jne L(nequal)
+ test %eax, %eax
+ jz L(equal)
+
+ mov 4(%esi), %ecx
+ cmp %ecx, 4(%edi)
+ jne L(nequal)
+ test %ecx, %ecx
+ jz L(equal)
+
+ mov 8(%esi), %ecx
+ cmp %ecx, 8(%edi)
+ jne L(nequal)
+ test %ecx, %ecx
+ jz L(equal)
+
+ mov 12(%esi), %ecx
+ cmp %ecx, 12(%edi)
+ jne L(nequal)
+ xor %eax, %eax
+ RETURN
+
+ .p2align 4
+L(less4_double_words):
+ xor %eax, %eax
+ test %dl, %dl
+ jz L(next_two_double_words)
+ and $15, %dl
+ jz L(second_double_word)
+ mov (%esi), %ecx
+ cmp %ecx, (%edi)
+ jne L(nequal)
+ RETURN
+
+ .p2align 4
+L(second_double_word):
+ mov 4(%esi), %ecx
+ cmp %ecx, 4(%edi)
+ jne L(nequal)
+ RETURN
+
+ .p2align 4
+L(next_two_double_words):
+ and $15, %dh
+ jz L(fourth_double_word)
+ mov 8(%esi), %ecx
+ cmp %ecx, 8(%edi)
+ jne L(nequal)
+ RETURN
+
+ .p2align 4
+L(fourth_double_word):
+ mov 12(%esi), %ecx
+ cmp %ecx, 12(%edi)
+ jne L(nequal)
+ RETURN
+
+ .p2align 4
+L(less4_double_words_16):
+ xor %eax, %eax
+ test %dl, %dl
+ jz L(next_two_double_words_16)
+ and $15, %dl
+ jz L(second_double_word_16)
+ mov 16(%esi), %ecx
+ cmp %ecx, 16(%edi)
+ jne L(nequal)
+ RETURN
+
+ .p2align 4
+L(second_double_word_16):
+ mov 20(%esi), %ecx
+ cmp %ecx, 20(%edi)
+ jne L(nequal)
+ RETURN
+
+ .p2align 4
+L(next_two_double_words_16):
+ and $15, %dh
+ jz L(fourth_double_word_16)
+ mov 24(%esi), %ecx
+ cmp %ecx, 24(%edi)
+ jne L(nequal)
+ RETURN
+
+ .p2align 4
+L(fourth_double_word_16):
+ mov 28(%esi), %ecx
+ cmp %ecx, 28(%edi)
+ jne L(nequal)
+ RETURN
+
+ .p2align 4
+L(less4_double_words_32):
+ xor %eax, %eax
+ test %dl, %dl
+ jz L(next_two_double_words_32)
+ and $15, %dl
+ jz L(second_double_word_32)
+ mov 32(%esi), %ecx
+ cmp %ecx, 32(%edi)
+ jne L(nequal)
+ RETURN
+
+ .p2align 4
+L(second_double_word_32):
+ mov 36(%esi), %ecx
+ cmp %ecx, 36(%edi)
+ jne L(nequal)
+ RETURN
+
+ .p2align 4
+L(next_two_double_words_32):
+ and $15, %dh
+ jz L(fourth_double_word_32)
+ mov 40(%esi), %ecx
+ cmp %ecx, 40(%edi)
+ jne L(nequal)
+ RETURN
+
+ .p2align 4
+L(fourth_double_word_32):
+ mov 44(%esi), %ecx
+ cmp %ecx, 44(%edi)
+ jne L(nequal)
+ RETURN
+
+ .p2align 4
+L(less4_double_words_48):
+ xor %eax, %eax
+ test %dl, %dl
+ jz L(next_two_double_words_48)
+ and $15, %dl
+ jz L(second_double_word_48)
+ mov 48(%esi), %ecx
+ cmp %ecx, 48(%edi)
+ jne L(nequal)
+ RETURN
+
+ .p2align 4
+L(second_double_word_48):
+ mov 52(%esi), %ecx
+ cmp %ecx, 52(%edi)
+ jne L(nequal)
+ RETURN
+
+ .p2align 4
+L(next_two_double_words_48):
+ and $15, %dh
+ jz L(fourth_double_word_48)
+ mov 56(%esi), %ecx
+ cmp %ecx, 56(%edi)
+ jne L(nequal)
+ RETURN
+
+ .p2align 4
+L(fourth_double_word_48):
+ mov 60(%esi), %ecx
+ cmp %ecx, 60(%edi)
+ jne L(nequal)
+ RETURN
+
+ .p2align 4
+L(nequal):
+ mov $1, %eax
+ jg L(return)
+ neg %eax
+ RETURN
+
+ .p2align 4
+L(return):
+ RETURN
+
+ .p2align 4
+L(equal):
+ xorl %eax, %eax
+ RETURN
+
+ CFI_POP (%edi)
+ CFI_POP (%esi)
+
+ .p2align 4
+L(neq):
+ mov $1, %eax
+ jg L(neq_bigger)
+ neg %eax
+
+L(neq_bigger):
+ ret
+
+ .p2align 4
+L(eq):
+ xorl %eax, %eax
+ ret
+
+END (wcscmp)
+