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Diffstat (limited to 'sysdeps/i386/i686/multiarch/memrchr-sse2.S')
-rw-r--r--sysdeps/i386/i686/multiarch/memrchr-sse2.S725
1 files changed, 725 insertions, 0 deletions
diff --git a/sysdeps/i386/i686/multiarch/memrchr-sse2.S b/sysdeps/i386/i686/multiarch/memrchr-sse2.S
new file mode 100644
index 0000000000..68f4bc7b26
--- /dev/null
+++ b/sysdeps/i386/i686/multiarch/memrchr-sse2.S
@@ -0,0 +1,725 @@
+/* Optimized memrchr with sse2 without bsf
+ Copyright (C) 2011 Free Software Foundation, Inc.
+ Contributed by Intel Corporation.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#ifndef NOT_IN_libc
+
+# include <sysdep.h>
+# 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 4
+# define STR1 PARMS
+# define STR2 STR1+4
+# define LEN STR2+4
+
+ atom_text_section
+ENTRY (__memrchr_sse2)
+ mov STR1(%esp), %ecx
+ movd STR2(%esp), %xmm1
+ mov LEN(%esp), %edx
+
+ sub $16, %edx
+ jbe L(length_less16)
+
+ punpcklbw %xmm1, %xmm1
+ add %edx, %ecx
+ punpcklbw %xmm1, %xmm1
+
+ movdqu (%ecx), %xmm0
+ pshufd $0, %xmm1, %xmm1
+ pcmpeqb %xmm1, %xmm0
+
+ pmovmskb %xmm0, %eax
+ test %eax, %eax
+ jnz L(exit_dispatch)
+
+ sub $64, %ecx
+ mov %ecx, %eax
+ and $15, %eax
+ jz L(loop_prolog)
+
+ lea 16(%ecx), %ecx
+ lea 16(%edx), %edx
+ sub %eax, %edx
+ and $-16, %ecx
+
+ .p2align 4
+/* Loop start on aligned string. */
+L(loop_prolog):
+ sub $64, %edx
+ jbe L(exit_loop)
+
+ movdqa 48(%ecx), %xmm0
+ pcmpeqb %xmm1, %xmm0
+ pmovmskb %xmm0, %eax
+ test %eax, %eax
+ jnz L(matches48)
+
+ movdqa 32(%ecx), %xmm2
+ pcmpeqb %xmm1, %xmm2
+ pmovmskb %xmm2, %eax
+ test %eax, %eax
+ jnz L(matches32)
+
+ movdqa 16(%ecx), %xmm3
+ pcmpeqb %xmm1, %xmm3
+ pmovmskb %xmm3, %eax
+ test %eax, %eax
+ jnz L(matches16)
+
+ movdqa (%ecx), %xmm4
+ pcmpeqb %xmm1, %xmm4
+ pmovmskb %xmm4, %eax
+ test %eax, %eax
+ jnz L(exit_dispatch)
+
+ sub $64, %ecx
+ sub $64, %edx
+ jbe L(exit_loop)
+
+ movdqa 48(%ecx), %xmm0
+ pcmpeqb %xmm1, %xmm0
+ pmovmskb %xmm0, %eax
+ test %eax, %eax
+ jnz L(matches48)
+
+ movdqa 32(%ecx), %xmm2
+ pcmpeqb %xmm1, %xmm2
+ pmovmskb %xmm2, %eax
+ test %eax, %eax
+ jnz L(matches32)
+
+ movdqa 16(%ecx), %xmm3
+ pcmpeqb %xmm1, %xmm3
+ pmovmskb %xmm3, %eax
+ test %eax, %eax
+ jnz L(matches16)
+
+ movdqa (%ecx), %xmm3
+ pcmpeqb %xmm1, %xmm3
+ pmovmskb %xmm3, %eax
+ test %eax, %eax
+ jnz L(exit_dispatch)
+
+ mov %ecx, %eax
+ and $63, %eax
+ test %eax, %eax
+ jz L(align64_loop)
+
+ lea 64(%ecx), %ecx
+ lea 64(%edx), %edx
+ and $-64, %ecx
+ sub %eax, %edx
+
+ .p2align 4
+L(align64_loop):
+ sub $64, %ecx
+ sub $64, %edx
+ jbe L(exit_loop)
+
+ movdqa (%ecx), %xmm0
+ movdqa 16(%ecx), %xmm2
+ movdqa 32(%ecx), %xmm3
+ movdqa 48(%ecx), %xmm4
+
+ pcmpeqb %xmm1, %xmm0
+ pcmpeqb %xmm1, %xmm2
+ pcmpeqb %xmm1, %xmm3
+ pcmpeqb %xmm1, %xmm4
+
+ pmaxub %xmm3, %xmm0
+ pmaxub %xmm4, %xmm2
+ pmaxub %xmm0, %xmm2
+ pmovmskb %xmm2, %eax
+
+ test %eax, %eax
+ jz L(align64_loop)
+
+ pmovmskb %xmm4, %eax
+ test %eax, %eax
+ jnz L(matches48)
+
+ pmovmskb %xmm3, %eax
+ test %eax, %eax
+ jnz L(matches32)
+
+ movdqa 16(%ecx), %xmm2
+
+ pcmpeqb %xmm1, %xmm2
+ pcmpeqb (%ecx), %xmm1
+
+ pmovmskb %xmm2, %eax
+ test %eax, %eax
+ jnz L(matches16)
+
+ pmovmskb %xmm1, %eax
+ test %ah, %ah
+ jnz L(exit_dispatch_high)
+ mov %al, %dl
+ and $15 << 4, %dl
+ jnz L(exit_dispatch_8)
+ test $0x08, %al
+ jnz L(exit_4)
+ test $0x04, %al
+ jnz L(exit_3)
+ test $0x02, %al
+ jnz L(exit_2)
+ mov %ecx, %eax
+ ret
+
+ .p2align 4
+L(exit_loop):
+ add $64, %edx
+ cmp $32, %edx
+ jbe L(exit_loop_32)
+
+ movdqa 48(%ecx), %xmm0
+ pcmpeqb %xmm1, %xmm0
+ pmovmskb %xmm0, %eax
+ test %eax, %eax
+ jnz L(matches48)
+
+ movdqa 32(%ecx), %xmm2
+ pcmpeqb %xmm1, %xmm2
+ pmovmskb %xmm2, %eax
+ test %eax, %eax
+ jnz L(matches32)
+
+ movdqa 16(%ecx), %xmm3
+ pcmpeqb %xmm1, %xmm3
+ pmovmskb %xmm3, %eax
+ test %eax, %eax
+ jnz L(matches16_1)
+ cmp $48, %edx
+ jbe L(return_null)
+
+ pcmpeqb (%ecx), %xmm1
+ pmovmskb %xmm1, %eax
+ test %eax, %eax
+ jnz L(matches0_1)
+ xor %eax, %eax
+ ret
+
+ .p2align 4
+L(exit_loop_32):
+ movdqa 48(%ecx), %xmm0
+ pcmpeqb %xmm1, %xmm0
+ pmovmskb %xmm0, %eax
+ test %eax, %eax
+ jnz L(matches48_1)
+ cmp $16, %edx
+ jbe L(return_null)
+
+ pcmpeqb 32(%ecx), %xmm1
+ pmovmskb %xmm1, %eax
+ test %eax, %eax
+ jnz L(matches32_1)
+ xor %eax, %eax
+ ret
+
+ .p2align 4
+L(matches16):
+ lea 16(%ecx), %ecx
+ test %ah, %ah
+ jnz L(exit_dispatch_high)
+ mov %al, %dl
+ and $15 << 4, %dl
+ jnz L(exit_dispatch_8)
+ test $0x08, %al
+ jnz L(exit_4)
+ test $0x04, %al
+ jnz L(exit_3)
+ test $0x02, %al
+ jnz L(exit_2)
+ mov %ecx, %eax
+ ret
+
+ .p2align 4
+L(matches32):
+ lea 32(%ecx), %ecx
+ test %ah, %ah
+ jnz L(exit_dispatch_high)
+ mov %al, %dl
+ and $15 << 4, %dl
+ jnz L(exit_dispatch_8)
+ test $0x08, %al
+ jnz L(exit_4)
+ test $0x04, %al
+ jnz L(exit_3)
+ test $0x02, %al
+ jnz L(exit_2)
+ mov %ecx, %eax
+ ret
+
+ .p2align 4
+L(matches48):
+ lea 48(%ecx), %ecx
+
+ .p2align 4
+L(exit_dispatch):
+ test %ah, %ah
+ jnz L(exit_dispatch_high)
+ mov %al, %dl
+ and $15 << 4, %dl
+ jnz L(exit_dispatch_8)
+ test $0x08, %al
+ jnz L(exit_4)
+ test $0x04, %al
+ jnz L(exit_3)
+ test $0x02, %al
+ jnz L(exit_2)
+ mov %ecx, %eax
+ ret
+
+ .p2align 4
+L(exit_dispatch_8):
+ test $0x80, %al
+ jnz L(exit_8)
+ test $0x40, %al
+ jnz L(exit_7)
+ test $0x20, %al
+ jnz L(exit_6)
+ lea 4(%ecx), %eax
+ ret
+
+ .p2align 4
+L(exit_dispatch_high):
+ mov %ah, %dh
+ and $15 << 4, %dh
+ jnz L(exit_dispatch_high_8)
+ test $0x08, %ah
+ jnz L(exit_12)
+ test $0x04, %ah
+ jnz L(exit_11)
+ test $0x02, %ah
+ jnz L(exit_10)
+ lea 8(%ecx), %eax
+ ret
+
+ .p2align 4
+L(exit_dispatch_high_8):
+ test $0x80, %ah
+ jnz L(exit_16)
+ test $0x40, %ah
+ jnz L(exit_15)
+ test $0x20, %ah
+ jnz L(exit_14)
+ lea 12(%ecx), %eax
+ ret
+
+ .p2align 4
+L(exit_2):
+ lea 1(%ecx), %eax
+ ret
+
+ .p2align 4
+L(exit_3):
+ lea 2(%ecx), %eax
+ ret
+
+ .p2align 4
+L(exit_4):
+ lea 3(%ecx), %eax
+ ret
+
+ .p2align 4
+L(exit_6):
+ lea 5(%ecx), %eax
+ ret
+
+ .p2align 4
+L(exit_7):
+ lea 6(%ecx), %eax
+ ret
+
+ .p2align 4
+L(exit_8):
+ lea 7(%ecx), %eax
+ ret
+
+ .p2align 4
+L(exit_10):
+ lea 9(%ecx), %eax
+ ret
+
+ .p2align 4
+L(exit_11):
+ lea 10(%ecx), %eax
+ ret
+
+ .p2align 4
+L(exit_12):
+ lea 11(%ecx), %eax
+ ret
+
+ .p2align 4
+L(exit_14):
+ lea 13(%ecx), %eax
+ ret
+
+ .p2align 4
+L(exit_15):
+ lea 14(%ecx), %eax
+ ret
+
+ .p2align 4
+L(exit_16):
+ lea 15(%ecx), %eax
+ ret
+
+ .p2align 4
+L(matches0_1):
+ lea -64(%edx), %edx
+
+ test %ah, %ah
+ jnz L(exit_dispatch_1_high)
+ mov %al, %ah
+ and $15 << 4, %ah
+ jnz L(exit_dispatch_1_8)
+ test $0x08, %al
+ jnz L(exit_1_4)
+ test $0x04, %al
+ jnz L(exit_1_3)
+ test $0x02, %al
+ jnz L(exit_1_2)
+ add $0, %edx
+ jl L(return_null)
+ mov %ecx, %eax
+ ret
+
+ .p2align 4
+L(matches16_1):
+ lea -48(%edx), %edx
+ lea 16(%ecx), %ecx
+
+ test %ah, %ah
+ jnz L(exit_dispatch_1_high)
+ mov %al, %ah
+ and $15 << 4, %ah
+ jnz L(exit_dispatch_1_8)
+ test $0x08, %al
+ jnz L(exit_1_4)
+ test $0x04, %al
+ jnz L(exit_1_3)
+ test $0x02, %al
+ jnz L(exit_1_2)
+ add $0, %edx
+ jl L(return_null)
+ mov %ecx, %eax
+ ret
+
+ .p2align 4
+L(matches32_1):
+ lea -32(%edx), %edx
+ lea 32(%ecx), %ecx
+
+ test %ah, %ah
+ jnz L(exit_dispatch_1_high)
+ mov %al, %ah
+ and $15 << 4, %ah
+ jnz L(exit_dispatch_1_8)
+ test $0x08, %al
+ jnz L(exit_1_4)
+ test $0x04, %al
+ jnz L(exit_1_3)
+ test $0x02, %al
+ jnz L(exit_1_2)
+ add $0, %edx
+ jl L(return_null)
+ mov %ecx, %eax
+ ret
+
+ .p2align 4
+L(matches48_1):
+ lea -16(%edx), %edx
+ lea 48(%ecx), %ecx
+
+ .p2align 4
+L(exit_dispatch_1):
+ test %ah, %ah
+ jnz L(exit_dispatch_1_high)
+ mov %al, %ah
+ and $15 << 4, %ah
+ jnz L(exit_dispatch_1_8)
+ test $0x08, %al
+ jnz L(exit_1_4)
+ test $0x04, %al
+ jnz L(exit_1_3)
+ test $0x02, %al
+ jnz L(exit_1_2)
+ add $0, %edx
+ jl L(return_null)
+ mov %ecx, %eax
+ ret
+
+ .p2align 4
+L(exit_dispatch_1_8):
+ test $0x80, %al
+ jnz L(exit_1_8)
+ test $0x40, %al
+ jnz L(exit_1_7)
+ test $0x20, %al
+ jnz L(exit_1_6)
+ add $4, %edx
+ jl L(return_null)
+ lea 4(%ecx), %eax
+ ret
+
+ .p2align 4
+L(exit_dispatch_1_high):
+ mov %ah, %al
+ and $15 << 4, %al
+ jnz L(exit_dispatch_1_high_8)
+ test $0x08, %ah
+ jnz L(exit_1_12)
+ test $0x04, %ah
+ jnz L(exit_1_11)
+ test $0x02, %ah
+ jnz L(exit_1_10)
+ add $8, %edx
+ jl L(return_null)
+ lea 8(%ecx), %eax
+ ret
+
+ .p2align 4
+L(exit_dispatch_1_high_8):
+ test $0x80, %ah
+ jnz L(exit_1_16)
+ test $0x40, %ah
+ jnz L(exit_1_15)
+ test $0x20, %ah
+ jnz L(exit_1_14)
+ add $12, %edx
+ jl L(return_null)
+ lea 12(%ecx), %eax
+ ret
+
+ .p2align 4
+L(exit_1_2):
+ add $1, %edx
+ jl L(return_null)
+ lea 1(%ecx), %eax
+ ret
+
+ .p2align 4
+L(exit_1_3):
+ add $2, %edx
+ jl L(return_null)
+ lea 2(%ecx), %eax
+ ret
+
+ .p2align 4
+L(exit_1_4):
+ add $3, %edx
+ jl L(return_null)
+ lea 3(%ecx), %eax
+ ret
+
+ .p2align 4
+L(exit_1_6):
+ add $5, %edx
+ jl L(return_null)
+ lea 5(%ecx), %eax
+ ret
+
+ .p2align 4
+L(exit_1_7):
+ add $6, %edx
+ jl L(return_null)
+ lea 6(%ecx), %eax
+ ret
+
+ .p2align 4
+L(exit_1_8):
+ add $7, %edx
+ jl L(return_null)
+ lea 7(%ecx), %eax
+ ret
+
+ .p2align 4
+L(exit_1_10):
+ add $9, %edx
+ jl L(return_null)
+ lea 9(%ecx), %eax
+ ret
+
+ .p2align 4
+L(exit_1_11):
+ add $10, %edx
+ jl L(return_null)
+ lea 10(%ecx), %eax
+ ret
+
+ .p2align 4
+L(exit_1_12):
+ add $11, %edx
+ jl L(return_null)
+ lea 11(%ecx), %eax
+ ret
+
+ .p2align 4
+L(exit_1_14):
+ add $13, %edx
+ jl L(return_null)
+ lea 13(%ecx), %eax
+ ret
+
+ .p2align 4
+L(exit_1_15):
+ add $14, %edx
+ jl L(return_null)
+ lea 14(%ecx), %eax
+ ret
+
+ .p2align 4
+L(exit_1_16):
+ add $15, %edx
+ jl L(return_null)
+ lea 15(%ecx), %eax
+ ret
+
+ .p2align 4
+L(return_null):
+ xor %eax, %eax
+ ret
+
+ .p2align 4
+L(length_less16_offset0):
+ mov %dl, %cl
+ pcmpeqb (%eax), %xmm1
+
+ mov $1, %edx
+ sal %cl, %edx
+ sub $1, %edx
+
+ mov %eax, %ecx
+ pmovmskb %xmm1, %eax
+
+ and %edx, %eax
+ test %eax, %eax
+ jnz L(exit_dispatch)
+
+ xor %eax, %eax
+ ret
+
+ .p2align 4
+L(length_less16):
+ punpcklbw %xmm1, %xmm1
+ add $16, %edx
+ je L(return_null)
+ punpcklbw %xmm1, %xmm1
+
+ mov %ecx, %eax
+ pshufd $0, %xmm1, %xmm1
+
+ and $15, %ecx
+ jz L(length_less16_offset0)
+
+ PUSH (%edi)
+
+ mov %cl, %dh
+ add %dl, %dh
+ and $-16, %eax
+
+ sub $16, %dh
+ ja L(length_less16_part2)
+
+ pcmpeqb (%eax), %xmm1
+ pmovmskb %xmm1, %edi
+
+ sar %cl, %edi
+ add %ecx, %eax
+ mov %dl, %cl
+
+ mov $1, %edx
+ sal %cl, %edx
+ sub $1, %edx
+
+ and %edx, %edi
+ test %edi, %edi
+ jz L(ret_null)
+
+ bsr %edi, %edi
+ add %edi, %eax
+ POP (%edi)
+ ret
+
+ CFI_PUSH (%edi)
+
+ .p2align 4
+L(length_less16_part2):
+ movdqa 16(%eax), %xmm2
+ pcmpeqb %xmm1, %xmm2
+ pmovmskb %xmm2, %edi
+
+ mov %cl, %ch
+
+ mov %dh, %cl
+ mov $1, %edx
+ sal %cl, %edx
+ sub $1, %edx
+
+ and %edx, %edi
+
+ test %edi, %edi
+ jnz L(length_less16_part2_return)
+
+ pcmpeqb (%eax), %xmm1
+ pmovmskb %xmm1, %edi
+
+ mov %ch, %cl
+ sar %cl, %edi
+ test %edi, %edi
+ jz L(ret_null)
+
+ bsr %edi, %edi
+ add %edi, %eax
+ xor %ch, %ch
+ add %ecx, %eax
+ POP (%edi)
+ ret
+
+ CFI_PUSH (%edi)
+
+ .p2align 4
+L(length_less16_part2_return):
+ bsr %edi, %edi
+ lea 16(%eax, %edi), %eax
+ POP (%edi)
+ ret
+
+ CFI_PUSH (%edi)
+
+ .p2align 4
+L(ret_null):
+ xor %eax, %eax
+ POP (%edi)
+ ret
+
+END (__memrchr_sse2)
+#endif