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-rw-r--r--libc/arch-x86/string/sse2-strlen-atom.S670
1 files changed, 525 insertions, 145 deletions
diff --git a/libc/arch-x86/string/sse2-strlen-atom.S b/libc/arch-x86/string/sse2-strlen-atom.S
index 8911868..81768fb 100644
--- a/libc/arch-x86/string/sse2-strlen-atom.S
+++ b/libc/arch-x86/string/sse2-strlen-atom.S
@@ -1,71 +1,112 @@
-#define STRLEN sse2_strlen_atom
-
-#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 cfi_remember_state
-# define cfi_remember_state .cfi_remember_state
-#endif
-
-#ifndef cfi_restore_state
-# define cfi_restore_state .cfi_restore_state
-#endif
-
-#ifndef ENTRY
-# define ENTRY(name) \
- .type name, @function; \
- .globl name; \
- .p2align 4; \
-name: \
+/*
+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 USE_AS_STRCAT
+
+# ifndef STRLEN
+# define STRLEN strlen
+# endif
+
+# 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
+
+/* calee safe register only for strnlen is required */
+
+# ifdef USE_AS_STRNLEN
+# 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
+# endif
+
+# ifndef ENTRY
+# define ENTRY(name) \
+ .type name, @function; \
+ .globl name; \
+ .p2align 4; \
+name: \
cfi_startproc
-#endif
+# endif
-#ifndef END
-# define END(name) \
- cfi_endproc; \
+# ifndef END
+# define END(name) \
+ cfi_endproc; \
.size name, .-name
-#endif
+# endif
+
+# define PARMS 4
+# define STR PARMS
+# define RETURN ret
-#define CFI_PUSH(REG) \
- cfi_adjust_cfa_offset (4); \
- cfi_rel_offset (REG, 0)
+# ifdef USE_AS_STRNLEN
+# define LEN PARMS + 8
+# 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 PARMS 4
-#define STR PARMS
-#define ENTRANCE
-#define RETURN ret
+# define PUSH(REG) pushl REG; CFI_PUSH (REG)
+# define POP(REG) popl REG; CFI_POP (REG)
+# undef RETURN
+# define RETURN POP (%edi); ret; CFI_PUSH(%edi);
+# endif
.text
ENTRY (STRLEN)
- ENTRANCE
mov STR(%esp), %edx
+# ifdef USE_AS_STRNLEN
+ PUSH (%edi)
+ movl LEN(%esp), %edi
+ sub $4, %edi
+ jbe L(len_less4_prolog)
+# endif
+#endif
xor %eax, %eax
cmpb $0, (%edx)
jz L(exit_tail0)
@@ -75,6 +116,12 @@ ENTRY (STRLEN)
jz L(exit_tail2)
cmpb $0, 3(%edx)
jz L(exit_tail3)
+
+#ifdef USE_AS_STRNLEN
+ sub $4, %edi
+ jbe L(len_less8_prolog)
+#endif
+
cmpb $0, 4(%edx)
jz L(exit_tail4)
cmpb $0, 5(%edx)
@@ -83,6 +130,12 @@ ENTRY (STRLEN)
jz L(exit_tail6)
cmpb $0, 7(%edx)
jz L(exit_tail7)
+
+#ifdef USE_AS_STRNLEN
+ sub $4, %edi
+ jbe L(len_less12_prolog)
+#endif
+
cmpb $0, 8(%edx)
jz L(exit_tail8)
cmpb $0, 9(%edx)
@@ -91,6 +144,12 @@ ENTRY (STRLEN)
jz L(exit_tail10)
cmpb $0, 11(%edx)
jz L(exit_tail11)
+
+#ifdef USE_AS_STRNLEN
+ sub $4, %edi
+ jbe L(len_less16_prolog)
+#endif
+
cmpb $0, 12(%edx)
jz L(exit_tail12)
cmpb $0, 13(%edx)
@@ -99,213 +158,533 @@ ENTRY (STRLEN)
jz L(exit_tail14)
cmpb $0, 15(%edx)
jz L(exit_tail15)
+
pxor %xmm0, %xmm0
- mov %edx, %eax
- mov %edx, %ecx
+ lea 16(%edx), %eax
+ mov %eax, %ecx
and $-16, %eax
- add $16, %ecx
- add $16, %eax
+
+#ifdef USE_AS_STRNLEN
+ and $15, %edx
+ add %edx, %edi
+ sub $64, %edi
+ jbe L(len_less64)
+#endif
pcmpeqb (%eax), %xmm0
pmovmskb %xmm0, %edx
pxor %xmm1, %xmm1
- test %edx, %edx
lea 16(%eax), %eax
+ test %edx, %edx
jnz L(exit)
pcmpeqb (%eax), %xmm1
pmovmskb %xmm1, %edx
pxor %xmm2, %xmm2
- test %edx, %edx
lea 16(%eax), %eax
+ test %edx, %edx
jnz L(exit)
-
pcmpeqb (%eax), %xmm2
pmovmskb %xmm2, %edx
pxor %xmm3, %xmm3
- test %edx, %edx
lea 16(%eax), %eax
+ test %edx, %edx
jnz L(exit)
pcmpeqb (%eax), %xmm3
pmovmskb %xmm3, %edx
- test %edx, %edx
lea 16(%eax), %eax
+ test %edx, %edx
jnz L(exit)
+#ifdef USE_AS_STRNLEN
+ sub $64, %edi
+ jbe L(len_less64)
+#endif
+
pcmpeqb (%eax), %xmm0
pmovmskb %xmm0, %edx
- test %edx, %edx
lea 16(%eax), %eax
+ test %edx, %edx
jnz L(exit)
pcmpeqb (%eax), %xmm1
pmovmskb %xmm1, %edx
- test %edx, %edx
lea 16(%eax), %eax
+ test %edx, %edx
jnz L(exit)
pcmpeqb (%eax), %xmm2
pmovmskb %xmm2, %edx
- test %edx, %edx
lea 16(%eax), %eax
+ test %edx, %edx
jnz L(exit)
pcmpeqb (%eax), %xmm3
pmovmskb %xmm3, %edx
- test %edx, %edx
lea 16(%eax), %eax
+ test %edx, %edx
jnz L(exit)
+#ifdef USE_AS_STRNLEN
+ sub $64, %edi
+ jbe L(len_less64)
+#endif
+
pcmpeqb (%eax), %xmm0
pmovmskb %xmm0, %edx
- test %edx, %edx
lea 16(%eax), %eax
+ test %edx, %edx
jnz L(exit)
pcmpeqb (%eax), %xmm1
pmovmskb %xmm1, %edx
- test %edx, %edx
lea 16(%eax), %eax
+ test %edx, %edx
jnz L(exit)
pcmpeqb (%eax), %xmm2
pmovmskb %xmm2, %edx
- test %edx, %edx
lea 16(%eax), %eax
+ test %edx, %edx
jnz L(exit)
pcmpeqb (%eax), %xmm3
pmovmskb %xmm3, %edx
- test %edx, %edx
lea 16(%eax), %eax
+ test %edx, %edx
jnz L(exit)
+#ifdef USE_AS_STRNLEN
+ sub $64, %edi
+ jbe L(len_less64)
+#endif
+
pcmpeqb (%eax), %xmm0
pmovmskb %xmm0, %edx
- test %edx, %edx
lea 16(%eax), %eax
+ test %edx, %edx
jnz L(exit)
pcmpeqb (%eax), %xmm1
pmovmskb %xmm1, %edx
- test %edx, %edx
lea 16(%eax), %eax
+ test %edx, %edx
jnz L(exit)
pcmpeqb (%eax), %xmm2
pmovmskb %xmm2, %edx
- test %edx, %edx
lea 16(%eax), %eax
+ test %edx, %edx
jnz L(exit)
pcmpeqb (%eax), %xmm3
pmovmskb %xmm3, %edx
- test %edx, %edx
lea 16(%eax), %eax
+ test %edx, %edx
jnz L(exit)
+#ifdef USE_AS_STRNLEN
+ mov %eax, %edx
+ and $63, %edx
+ add %edx, %edi
+#endif
+
and $-0x40, %eax
- PUSH (%esi)
- PUSH (%edi)
- PUSH (%ebx)
- PUSH (%ebp)
- xor %ebp, %ebp
-L(aligned_64):
- pcmpeqb (%eax), %xmm0
- pcmpeqb 16(%eax), %xmm1
- pcmpeqb 32(%eax), %xmm2
- pcmpeqb 48(%eax), %xmm3
- pmovmskb %xmm0, %edx
- pmovmskb %xmm1, %esi
- pmovmskb %xmm2, %edi
- pmovmskb %xmm3, %ebx
- or %edx, %ebp
- or %esi, %ebp
- or %edi, %ebp
- or %ebx, %ebp
+
+ .p2align 4
+L(aligned_64_loop):
+#ifdef USE_AS_STRNLEN
+ sub $64, %edi
+ jbe L(len_less64)
+#endif
+ movaps (%eax), %xmm0
+ movaps 16(%eax), %xmm1
+ movaps 32(%eax), %xmm2
+ movaps 48(%eax), %xmm6
+ pminub %xmm1, %xmm0
+ pminub %xmm6, %xmm2
+ pminub %xmm0, %xmm2
+ pcmpeqb %xmm3, %xmm2
+ pmovmskb %xmm2, %edx
lea 64(%eax), %eax
- jz L(aligned_64)
-L(48leave):
test %edx, %edx
- jnz L(aligned_64_exit_16)
- test %esi, %esi
- jnz L(aligned_64_exit_32)
- test %edi, %edi
- jnz L(aligned_64_exit_48)
- mov %ebx, %edx
- lea (%eax), %eax
- jmp L(aligned_64_exit)
-L(aligned_64_exit_48):
- lea -16(%eax), %eax
- mov %edi, %edx
- jmp L(aligned_64_exit)
-L(aligned_64_exit_32):
- lea -32(%eax), %eax
- mov %esi, %edx
- jmp L(aligned_64_exit)
-L(aligned_64_exit_16):
- lea -48(%eax), %eax
-L(aligned_64_exit):
- POP (%ebp)
- POP (%ebx)
- POP (%edi)
- POP (%esi)
+ jz L(aligned_64_loop)
+
+ pcmpeqb -64(%eax), %xmm3
+ pmovmskb %xmm3, %edx
+ lea 48(%ecx), %ecx
+ test %edx, %edx
+ jnz L(exit)
+
+ pcmpeqb %xmm1, %xmm3
+ pmovmskb %xmm3, %edx
+ lea -16(%ecx), %ecx
+ test %edx, %edx
+ jnz L(exit)
+
+ pcmpeqb -32(%eax), %xmm3
+ pmovmskb %xmm3, %edx
+ lea -16(%ecx), %ecx
+ test %edx, %edx
+ jnz L(exit)
+
+ pcmpeqb %xmm6, %xmm3
+ pmovmskb %xmm3, %edx
+ lea -16(%ecx), %ecx
L(exit):
sub %ecx, %eax
test %dl, %dl
jz L(exit_high)
+
+ mov %dl, %cl
+ and $15, %cl
+ jz L(exit_8)
test $0x01, %dl
jnz L(exit_tail0)
-
test $0x02, %dl
jnz L(exit_tail1)
-
test $0x04, %dl
jnz L(exit_tail2)
+ add $3, %eax
+ RETURN
- test $0x08, %dl
- jnz L(exit_tail3)
-
+ .p2align 4
+L(exit_8):
test $0x10, %dl
jnz L(exit_tail4)
-
test $0x20, %dl
jnz L(exit_tail5)
-
test $0x40, %dl
jnz L(exit_tail6)
add $7, %eax
-L(exit_tail0):
RETURN
+ .p2align 4
L(exit_high):
- add $8, %eax
+ mov %dh, %ch
+ and $15, %ch
+ jz L(exit_high_8)
test $0x01, %dh
+ jnz L(exit_tail8)
+ test $0x02, %dh
+ jnz L(exit_tail9)
+ test $0x04, %dh
+ jnz L(exit_tail10)
+ add $11, %eax
+ RETURN
+
+ .p2align 4
+L(exit_high_8):
+ test $0x10, %dh
+ jnz L(exit_tail12)
+ test $0x20, %dh
+ jnz L(exit_tail13)
+ test $0x40, %dh
+ jnz L(exit_tail14)
+ add $15, %eax
+L(exit_tail0):
+ RETURN
+
+#ifdef USE_AS_STRNLEN
+
+ .p2align 4
+L(len_less64):
+ pxor %xmm0, %xmm0
+ add $64, %edi
+
+ pcmpeqb (%eax), %xmm0
+ pmovmskb %xmm0, %edx
+ pxor %xmm1, %xmm1
+ lea 16(%eax), %eax
+ test %edx, %edx
+ jnz L(strnlen_exit)
+
+ sub $16, %edi
+ jbe L(return_start_len)
+
+ pcmpeqb (%eax), %xmm1
+ pmovmskb %xmm1, %edx
+ lea 16(%eax), %eax
+ test %edx, %edx
+ jnz L(strnlen_exit)
+
+ sub $16, %edi
+ jbe L(return_start_len)
+
+ pcmpeqb (%eax), %xmm0
+ pmovmskb %xmm0, %edx
+ lea 16(%eax), %eax
+ test %edx, %edx
+ jnz L(strnlen_exit)
+
+ sub $16, %edi
+ jbe L(return_start_len)
+
+ pcmpeqb (%eax), %xmm1
+ pmovmskb %xmm1, %edx
+ lea 16(%eax), %eax
+ test %edx, %edx
+ jnz L(strnlen_exit)
+
+#ifndef USE_AS_STRLCAT
+ movl LEN(%esp), %eax
+ RETURN
+#else
+ jmp L(return_start_len)
+#endif
+
+ .p2align 4
+L(strnlen_exit):
+ sub %ecx, %eax
+
+ test %dl, %dl
+ jz L(strnlen_exit_high)
+ mov %dl, %cl
+ and $15, %cl
+ jz L(strnlen_exit_8)
+ test $0x01, %dl
jnz L(exit_tail0)
+ test $0x02, %dl
+ jnz L(strnlen_exit_tail1)
+ test $0x04, %dl
+ jnz L(strnlen_exit_tail2)
+ sub $4, %edi
+ jb L(return_start_len)
+ lea 3(%eax), %eax
+ RETURN
- test $0x02, %dh
- jnz L(exit_tail1)
+ .p2align 4
+L(strnlen_exit_8):
+ test $0x10, %dl
+ jnz L(strnlen_exit_tail4)
+ test $0x20, %dl
+ jnz L(strnlen_exit_tail5)
+ test $0x40, %dl
+ jnz L(strnlen_exit_tail6)
+ sub $8, %edi
+ jb L(return_start_len)
+ lea 7(%eax), %eax
+ RETURN
+ .p2align 4
+L(strnlen_exit_high):
+ mov %dh, %ch
+ and $15, %ch
+ jz L(strnlen_exit_high_8)
+ test $0x01, %dh
+ jnz L(strnlen_exit_tail8)
+ test $0x02, %dh
+ jnz L(strnlen_exit_tail9)
test $0x04, %dh
- jnz L(exit_tail2)
-
- test $0x08, %dh
- jnz L(exit_tail3)
+ jnz L(strnlen_exit_tail10)
+ sub $12, %edi
+ jb L(return_start_len)
+ lea 11(%eax), %eax
+ RETURN
+ .p2align 4
+L(strnlen_exit_high_8):
test $0x10, %dh
- jnz L(exit_tail4)
-
+ jnz L(strnlen_exit_tail12)
test $0x20, %dh
- jnz L(exit_tail5)
-
+ jnz L(strnlen_exit_tail13)
test $0x40, %dh
- jnz L(exit_tail6)
- add $7, %eax
+ jnz L(strnlen_exit_tail14)
+ sub $16, %edi
+ jb L(return_start_len)
+ lea 15(%eax), %eax
+ RETURN
+
+ .p2align 4
+L(strnlen_exit_tail1):
+ sub $2, %edi
+ jb L(return_start_len)
+ lea 1(%eax), %eax
+ RETURN
+
+ .p2align 4
+L(strnlen_exit_tail2):
+ sub $3, %edi
+ jb L(return_start_len)
+ lea 2(%eax), %eax
+ RETURN
+
+ .p2align 4
+L(strnlen_exit_tail4):
+ sub $5, %edi
+ jb L(return_start_len)
+ lea 4(%eax), %eax
+ RETURN
+
+ .p2align 4
+L(strnlen_exit_tail5):
+ sub $6, %edi
+ jb L(return_start_len)
+ lea 5(%eax), %eax
+ RETURN
+
+ .p2align 4
+L(strnlen_exit_tail6):
+ sub $7, %edi
+ jb L(return_start_len)
+ lea 6(%eax), %eax
+ RETURN
+
+ .p2align 4
+L(strnlen_exit_tail8):
+ sub $9, %edi
+ jb L(return_start_len)
+ lea 8(%eax), %eax
+ RETURN
+
+ .p2align 4
+L(strnlen_exit_tail9):
+ sub $10, %edi
+ jb L(return_start_len)
+ lea 9(%eax), %eax
+ RETURN
+
+ .p2align 4
+L(strnlen_exit_tail10):
+ sub $11, %edi
+ jb L(return_start_len)
+ lea 10(%eax), %eax
+ RETURN
+
+ .p2align 4
+L(strnlen_exit_tail12):
+ sub $13, %edi
+ jb L(return_start_len)
+ lea 12(%eax), %eax
+ RETURN
+
+ .p2align 4
+L(strnlen_exit_tail13):
+ sub $14, %edi
+ jb L(return_start_len)
+ lea 13(%eax), %eax
+ RETURN
+
+ .p2align 4
+L(strnlen_exit_tail14):
+ sub $15, %edi
+ jb L(return_start_len)
+ lea 14(%eax), %eax
+ RETURN
+
+#ifndef USE_AS_STRLCAT
+ .p2align 4
+L(return_start_len):
+ movl LEN(%esp), %eax
+ RETURN
+#endif
+
+/* for prolog only */
+
+ .p2align 4
+L(len_less4_prolog):
+ xor %eax, %eax
+
+ add $4, %edi
+ jz L(exit_tail0)
+
+ cmpb $0, (%edx)
+ jz L(exit_tail0)
+ cmp $1, %edi
+ je L(exit_tail1)
+
+ cmpb $0, 1(%edx)
+ jz L(exit_tail1)
+ cmp $2, %edi
+ je L(exit_tail2)
+
+ cmpb $0, 2(%edx)
+ jz L(exit_tail2)
+ cmp $3, %edi
+ je L(exit_tail3)
+
+ cmpb $0, 3(%edx)
+ jz L(exit_tail3)
+ mov %edi, %eax
RETURN
.p2align 4
+L(len_less8_prolog):
+ add $4, %edi
+
+ cmpb $0, 4(%edx)
+ jz L(exit_tail4)
+ cmp $1, %edi
+ je L(exit_tail5)
+
+ cmpb $0, 5(%edx)
+ jz L(exit_tail5)
+ cmp $2, %edi
+ je L(exit_tail6)
+
+ cmpb $0, 6(%edx)
+ jz L(exit_tail6)
+ cmp $3, %edi
+ je L(exit_tail7)
+
+ cmpb $0, 7(%edx)
+ jz L(exit_tail7)
+ mov $8, %eax
+ RETURN
+
+
+ .p2align 4
+L(len_less12_prolog):
+ add $4, %edi
+
+ cmpb $0, 8(%edx)
+ jz L(exit_tail8)
+ cmp $1, %edi
+ je L(exit_tail9)
+
+ cmpb $0, 9(%edx)
+ jz L(exit_tail9)
+ cmp $2, %edi
+ je L(exit_tail10)
+
+ cmpb $0, 10(%edx)
+ jz L(exit_tail10)
+ cmp $3, %edi
+ je L(exit_tail11)
+
+ cmpb $0, 11(%edx)
+ jz L(exit_tail11)
+ mov $12, %eax
+ RETURN
+
+ .p2align 4
+L(len_less16_prolog):
+ add $4, %edi
+
+ cmpb $0, 12(%edx)
+ jz L(exit_tail12)
+ cmp $1, %edi
+ je L(exit_tail13)
+
+ cmpb $0, 13(%edx)
+ jz L(exit_tail13)
+ cmp $2, %edi
+ je L(exit_tail14)
+
+ cmpb $0, 14(%edx)
+ jz L(exit_tail14)
+ cmp $3, %edi
+ je L(exit_tail15)
+
+ cmpb $0, 15(%edx)
+ jz L(exit_tail15)
+ mov $16, %eax
+ RETURN
+#endif
+
+ .p2align 4
L(exit_tail1):
add $1, %eax
RETURN
@@ -364,6 +743,7 @@ L(exit_tail14):
L(exit_tail15):
add $15, %eax
- ret
-
+#ifndef USE_AS_STRCAT
+ RETURN
END (STRLEN)
+#endif
generated by cgit v1.1 at 2025-01-26 21:01:05 +0000