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Diffstat (limited to 'sysdeps/i386/i686/multiarch/memcmp-sse4.S')
-rw-r--r--sysdeps/i386/i686/multiarch/memcmp-sse4.S396
1 files changed, 309 insertions, 87 deletions
diff --git a/sysdeps/i386/i686/multiarch/memcmp-sse4.S b/sysdeps/i386/i686/multiarch/memcmp-sse4.S
index b1ed778f1f..1f5dbc15cb 100644
--- a/sysdeps/i386/i686/multiarch/memcmp-sse4.S
+++ b/sysdeps/i386/i686/multiarch/memcmp-sse4.S
@@ -1,5 +1,5 @@
-/* memcmp with SSE4.2
- Copyright (C) 2010 Free Software Foundation, Inc.
+/* memcmp with SSE4.2, wmemcmp with SSE4.2
+ Copyright (C) 2010, 2011 Free Software Foundation, Inc.
Contributed by Intel Corporation.
This file is part of the GNU C Library.
@@ -20,84 +20,97 @@
#ifndef NOT_IN_libc
-#include <sysdep.h>
-#include "asm-syntax.h"
+# include <sysdep.h>
-#ifndef MEMCMP
-# define MEMCMP __memcmp_sse4_2
-#endif
+# ifndef MEMCMP
+# define MEMCMP __memcmp_sse4_2
+# endif
-#define CFI_PUSH(REG) \
- cfi_adjust_cfa_offset (4); \
- cfi_rel_offset (REG, 0)
+# 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 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 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)
+# 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
+# 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. */ \
- call __i686.get_pc_thunk.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 adjuested EDX/ESI. Go. */ \
- jmp *%ebx
-
- .section .gnu.linkonce.t.__i686.get_pc_thunk.bx,"ax",@progbits
- .globl __i686.get_pc_thunk.bx
- .hidden __i686.get_pc_thunk.bx
- ALIGN (4)
- .type __i686.get_pc_thunk.bx,@function
-__i686.get_pc_thunk.bx:
- movl (%esp), %ebx
- ret
-#else
-# define JMPTBL(I, B) I
+ 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. */ \
+ call __i686.get_pc_thunk.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 adjuested 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
+ 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
- PUSH (%ebx)
+
+# 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)
- ALIGN (4)
+# ifndef USE_AS_WMEMCMP
+ .p2align 4
L(less8bytes):
mov (%eax), %bl
cmpb (%edx), %bl
@@ -141,22 +154,49 @@ L(less8bytes):
mov 6(%eax), %bl
cmpb 6(%edx), %bl
je L(0bytes)
+
L(nonzero):
- POP (%ebx)
+ POP (%ebx)
mov $1, %eax
ja L(above)
neg %eax
L(above):
ret
CFI_PUSH (%ebx)
+# endif
- ALIGN (4)
+ .p2align 4
L(0bytes):
- POP (%ebx)
+ POP (%ebx)
xor %eax, %eax
ret
- ALIGN (4)
+# 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
@@ -164,14 +204,14 @@ L(less1bytes):
sub %edx, %eax
ret
- ALIGN (4)
+ .p2align 4
L(0bytesend):
xor %eax, %eax
ret
-
- ALIGN (4)
+# endif
+ .p2align 4
L(64bytesormore):
- PUSH (%ebx)
+ PUSH (%ebx)
mov %ecx, %ebx
mov $64, %ecx
sub $64, %ebx
@@ -208,7 +248,14 @@ L(64bytesormore_loop):
add %ecx, %eax
BRANCH_TO_JMPTBL_ENTRY(L(table_64bytes), %ecx, 4)
- ALIGN (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):
@@ -218,9 +265,9 @@ L(find_48diff):
L(find_64diff):
add %ecx, %edx
add %ecx, %eax
- jmp L(16bytes)
- ALIGN (4)
+# ifndef USE_AS_WMEMCMP
+ .p2align 4
L(16bytes):
mov -16(%eax), %ecx
mov -16(%edx), %ebx
@@ -243,8 +290,30 @@ L(4bytes):
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
- ALIGN (4)
+# ifndef USE_AS_WMEMCMP
+ .p2align 4
L(49bytes):
movdqu -49(%eax), %xmm1
movdqu -49(%edx), %xmm2
@@ -285,7 +354,7 @@ L(5bytes):
jne L(end)
RETURN
- ALIGN (4)
+ .p2align 4
L(50bytes):
mov $-50, %ebx
movdqu -50(%eax), %xmm1
@@ -330,7 +399,7 @@ L(2bytes):
jne L(end)
RETURN
- ALIGN (4)
+ .p2align 4
L(51bytes):
mov $-51, %ebx
movdqu -51(%eax), %xmm1
@@ -378,8 +447,8 @@ L(1bytes):
mov $0, %eax
jne L(end)
RETURN
-
- ALIGN (4)
+# endif
+ .p2align 4
L(52bytes):
movdqu -52(%eax), %xmm1
movdqu -52(%edx), %xmm2
@@ -402,13 +471,18 @@ L(20bytes):
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
- ALIGN (4)
+# ifndef USE_AS_WMEMCMP
+ .p2align 4
L(53bytes):
movdqu -53(%eax), %xmm1
movdqu -53(%edx), %xmm2
@@ -440,7 +514,7 @@ L(21bytes):
jne L(end)
RETURN
- ALIGN (4)
+ .p2align 4
L(54bytes):
movdqu -54(%eax), %xmm1
movdqu -54(%edx), %xmm2
@@ -476,7 +550,7 @@ L(22bytes):
jne L(end)
RETURN
- ALIGN (4)
+ .p2align 4
L(55bytes):
movdqu -55(%eax), %xmm1
movdqu -55(%edx), %xmm2
@@ -513,8 +587,8 @@ L(23bytes):
mov $0, %eax
jne L(end)
RETURN
-
- ALIGN (4)
+# endif
+ .p2align 4
L(56bytes):
movdqu -56(%eax), %xmm1
movdqu -56(%edx), %xmm2
@@ -538,18 +612,27 @@ L(24bytes):
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
- ALIGN (4)
+# ifndef USE_AS_WMEMCMP
+ .p2align 4
L(57bytes):
movdqu -57(%eax), %xmm1
movdqu -57(%edx), %xmm2
@@ -585,7 +668,7 @@ L(25bytes):
jne L(end)
RETURN
- ALIGN (4)
+ .p2align 4
L(58bytes):
movdqu -58(%eax), %xmm1
movdqu -58(%edx), %xmm2
@@ -627,7 +710,7 @@ L(26bytes):
jne L(end)
RETURN
- ALIGN (4)
+ .p2align 4
L(59bytes):
movdqu -59(%eax), %xmm1
movdqu -59(%edx), %xmm2
@@ -668,8 +751,8 @@ L(27bytes):
mov $0, %eax
jne L(end)
RETURN
-
- ALIGN (4)
+# endif
+ .p2align 4
L(60bytes):
movdqu -60(%eax), %xmm1
movdqu -60(%edx), %xmm2
@@ -691,22 +774,38 @@ L(28bytes):
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
- ALIGN (4)
+# ifndef USE_AS_WMEMCMP
+ .p2align 4
L(61bytes):
movdqu -61(%eax), %xmm1
movdqu -61(%edx), %xmm2
@@ -749,7 +848,7 @@ L(29bytes):
jne L(end)
RETURN
- ALIGN (4)
+ .p2align 4
L(62bytes):
movdqu -62(%eax), %xmm1
movdqu -62(%edx), %xmm2
@@ -792,7 +891,7 @@ L(30bytes):
jne L(end)
RETURN
- ALIGN (4)
+ .p2align 4
L(63bytes):
movdqu -63(%eax), %xmm1
movdqu -63(%edx), %xmm2
@@ -838,8 +937,9 @@ L(31bytes):
mov $0, %eax
jne L(end)
RETURN
+# endif
- ALIGN (4)
+ .p2align 4
L(64bytes):
movdqu -64(%eax), %xmm1
movdqu -64(%edx), %xmm2
@@ -863,28 +963,45 @@ L(32bytes):
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
- ALIGN (4)
+# ifndef USE_AS_WMEMCMP
+ .p2align 4
L(less16bytes):
add %ebx, %eax
add %ebx, %edx
@@ -910,9 +1027,35 @@ L(less16bytes):
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
- ALIGN (4)
+ .p2align 4
L(find_diff):
+# ifndef USE_AS_WMEMCMP
cmpb %bl, %cl
jne L(end)
cmp %bx, %cx
@@ -923,17 +1066,29 @@ L(find_diff):
jne L(end)
cmp %bx, %cx
L(end):
- POP (%ebx)
+ 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
- ALIGN (2)
+ .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))
@@ -1000,5 +1155,72 @@ L(table_64bytes):
.int JMPTBL (L(62bytes), L(table_64bytes))
.int JMPTBL (L(63bytes), L(table_64bytes))
.int JMPTBL (L(64bytes), L(table_64bytes))
- .size L(table_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
generated by cgit v1.2.3-70-g09d2 (git 2.48.1) at 2025-03-07 07:48:14 +0000