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-wcsrchr-atom.S b/libc/arch-x86/string/sse2-wcsrchr-atom.S
new file mode 100644
index 0000000..e30779d
--- /dev/null
+++ b/libc/arch-x86/string/sse2-wcsrchr-atom.S
@@ -0,0 +1,402 @@
+/*
+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 PARMS 8
+#define ENTRANCE PUSH(%edi);
+#define RETURN POP(%edi); ret; CFI_PUSH(%edi);
+
+#define STR1 PARMS
+#define STR2 STR1+4
+
+ .text
+ENTRY (wcsrchr)
+
+ ENTRANCE
+ mov STR1(%esp), %ecx
+ movd STR2(%esp), %xmm1
+
+ mov %ecx, %edi
+ punpckldq %xmm1, %xmm1
+ pxor %xmm2, %xmm2
+ punpckldq %xmm1, %xmm1
+
+/* ECX has OFFSET. */
+ and $63, %ecx
+ cmp $48, %ecx
+ ja L(crosscache)
+
+/* unaligned string. */
+ movdqu (%edi), %xmm0
+ pcmpeqd %xmm0, %xmm2
+ pcmpeqd %xmm1, %xmm0
+/* Find where NULL is. */
+ pmovmskb %xmm2, %ecx
+/* Check if there is a match. */
+ pmovmskb %xmm0, %eax
+ add $16, %edi
+
+ test %eax, %eax
+ jnz L(unaligned_match1)
+
+ test %ecx, %ecx
+ jnz L(return_null)
+
+ and $-16, %edi
+
+ PUSH (%esi)
+
+ xor %edx, %edx
+ jmp L(loop)
+
+ CFI_POP (%esi)
+
+ .p2align 4
+L(unaligned_match1):
+ test %ecx, %ecx
+ jnz L(prolog_find_zero_1)
+
+ PUSH (%esi)
+
+/* Save current match */
+ mov %eax, %edx
+ mov %edi, %esi
+ and $-16, %edi
+ jmp L(loop)
+
+ CFI_POP (%esi)
+
+ .p2align 4
+L(crosscache):
+/* Hancle unaligned string. */
+ and $15, %ecx
+ and $-16, %edi
+ pxor %xmm3, %xmm3
+ movdqa (%edi), %xmm0
+ pcmpeqd %xmm0, %xmm3
+ pcmpeqd %xmm1, %xmm0
+/* Find where NULL is. */
+ pmovmskb %xmm3, %edx
+/* Check if there is a match. */
+ pmovmskb %xmm0, %eax
+/* Remove the leading bytes. */
+ shr %cl, %edx
+ shr %cl, %eax
+ add $16, %edi
+
+ test %eax, %eax
+ jnz L(unaligned_match)
+
+ test %edx, %edx
+ jnz L(return_null)
+
+ PUSH (%esi)
+
+ xor %edx, %edx
+ jmp L(loop)
+
+ CFI_POP (%esi)
+
+ .p2align 4
+L(unaligned_match):
+ test %edx, %edx
+ jnz L(prolog_find_zero)
+
+ PUSH (%esi)
+
+ mov %eax, %edx
+ lea (%edi, %ecx), %esi
+
+/* Loop start on aligned string. */
+ .p2align 4
+L(loop):
+ movdqa (%edi), %xmm0
+ pcmpeqd %xmm0, %xmm2
+ add $16, %edi
+ pcmpeqd %xmm1, %xmm0
+ pmovmskb %xmm2, %ecx
+ pmovmskb %xmm0, %eax
+ or %eax, %ecx
+ jnz L(matches)
+
+ movdqa (%edi), %xmm3
+ pcmpeqd %xmm3, %xmm2
+ add $16, %edi
+ pcmpeqd %xmm1, %xmm3
+ pmovmskb %xmm2, %ecx
+ pmovmskb %xmm3, %eax
+ or %eax, %ecx
+ jnz L(matches)
+
+ movdqa (%edi), %xmm4
+ pcmpeqd %xmm4, %xmm2
+ add $16, %edi
+ pcmpeqd %xmm1, %xmm4
+ pmovmskb %xmm2, %ecx
+ pmovmskb %xmm4, %eax
+ or %eax, %ecx
+ jnz L(matches)
+
+ movdqa (%edi), %xmm5
+ pcmpeqd %xmm5, %xmm2
+ add $16, %edi
+ pcmpeqd %xmm1, %xmm5
+ pmovmskb %xmm2, %ecx
+ pmovmskb %xmm5, %eax
+ or %eax, %ecx
+ jz L(loop)
+
+ .p2align 4
+L(matches):
+ test %eax, %eax
+ jnz L(match)
+L(return_value):
+ test %edx, %edx
+ jz L(return_null_1)
+ mov %edx, %eax
+ mov %esi, %edi
+
+ POP (%esi)
+
+ test %ah, %ah
+ jnz L(match_third_or_fourth_wchar)
+ test $15 << 4, %al
+ jnz L(match_second_wchar)
+ lea -16(%edi), %eax
+ RETURN
+
+ CFI_PUSH (%esi)
+
+ .p2align 4
+L(return_null_1):
+ POP (%esi)
+
+ xor %eax, %eax
+ RETURN
+
+ CFI_PUSH (%esi)
+
+ .p2align 4
+L(match):
+ pmovmskb %xmm2, %ecx
+ test %ecx, %ecx
+ jnz L(find_zero)
+/* save match info */
+ mov %eax, %edx
+ mov %edi, %esi
+ jmp L(loop)
+
+ .p2align 4
+L(find_zero):
+ test %cl, %cl
+ jz L(find_zero_in_third_or_fourth_wchar)
+ test $15, %cl
+ jz L(find_zero_in_second_wchar)
+ and $1, %eax
+ jz L(return_value)
+
+ POP (%esi)
+
+ lea -16(%edi), %eax
+ RETURN
+
+ CFI_PUSH (%esi)
+
+ .p2align 4
+L(find_zero_in_second_wchar):
+ and $1 << 5 - 1, %eax
+ jz L(return_value)
+
+ POP (%esi)
+
+ test $15 << 4, %al
+ jnz L(match_second_wchar)
+ lea -16(%edi), %eax
+ RETURN
+
+ CFI_PUSH (%esi)
+
+ .p2align 4
+L(find_zero_in_third_or_fourth_wchar):
+ test $15, %ch
+ jz L(find_zero_in_fourth_wchar)
+ and $1 << 9 - 1, %eax
+ jz L(return_value)
+
+ POP (%esi)
+
+ test %ah, %ah
+ jnz L(match_third_wchar)
+ test $15 << 4, %al
+ jnz L(match_second_wchar)
+ lea -16(%edi), %eax
+ RETURN
+
+ CFI_PUSH (%esi)
+
+ .p2align 4
+L(find_zero_in_fourth_wchar):
+
+ POP (%esi)
+
+ test %ah, %ah
+ jnz L(match_third_or_fourth_wchar)
+ test $15 << 4, %al
+ jnz L(match_second_wchar)
+ lea -16(%edi), %eax
+ RETURN
+
+ CFI_PUSH (%esi)
+
+ .p2align 4
+L(match_second_wchar):
+ lea -12(%edi), %eax
+ RETURN
+
+ .p2align 4
+L(match_third_or_fourth_wchar):
+ test $15 << 4, %ah
+ jnz L(match_fourth_wchar)
+ lea -8(%edi), %eax
+ RETURN
+
+ .p2align 4
+L(match_third_wchar):
+ lea -8(%edi), %eax
+ RETURN
+
+ .p2align 4
+L(match_fourth_wchar):
+ lea -4(%edi), %eax
+ RETURN
+
+ .p2align 4
+L(return_null):
+ xor %eax, %eax
+ RETURN
+
+ .p2align 4
+L(prolog_find_zero):
+ add %ecx, %edi
+ mov %edx, %ecx
+L(prolog_find_zero_1):
+ test %cl, %cl
+ jz L(prolog_find_zero_in_third_or_fourth_wchar)
+ test $15, %cl
+ jz L(prolog_find_zero_in_second_wchar)
+ and $1, %eax
+ jz L(return_null)
+
+ lea -16(%edi), %eax
+ RETURN
+
+ .p2align 4
+L(prolog_find_zero_in_second_wchar):
+ and $1 << 5 - 1, %eax
+ jz L(return_null)
+
+ test $15 << 4, %al
+ jnz L(match_second_wchar)
+ lea -16(%edi), %eax
+ RETURN
+
+ .p2align 4
+L(prolog_find_zero_in_third_or_fourth_wchar):
+ test $15, %ch
+ jz L(prolog_find_zero_in_fourth_wchar)
+ and $1 << 9 - 1, %eax
+ jz L(return_null)
+
+ test %ah, %ah
+ jnz L(match_third_wchar)
+ test $15 << 4, %al
+ jnz L(match_second_wchar)
+ lea -16(%edi), %eax
+ RETURN
+
+ .p2align 4
+L(prolog_find_zero_in_fourth_wchar):
+ test %ah, %ah
+ jnz L(match_third_or_fourth_wchar)
+ test $15 << 4, %al
+ jnz L(match_second_wchar)
+ lea -16(%edi), %eax
+ RETURN
+
+END (wcsrchr)