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platform_bionic/libc/arch-x86/string/sse2-memrchr-atom.S
Elliott Hughes ed777145e7 Tidy up the x86 atom/silvermont stuff similar to x86-64. 
Get rid of the bad precedent of having the architecture variant in the
file name *and* directory name.

Test: treehugger
Change-Id: I78582c12b4390578c51d52d4dd86f57470129abf
2022-07-25 16:27:25 +00:00

778 lines
12 KiB
ArmAsm
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/*
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 4
#define STR1 PARMS
#define STR2 STR1+4
#define LEN STR2+4
.text
ENTRY (memrchr)
mov STR1(%esp), %ecx
movd STR2(%esp), %xmm1
mov LEN(%esp), %edx
test %edx, %edx
jz L(return_null)
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)
add $16, %ecx
add $16, %edx
and $-16, %ecx
sub %eax, %edx
.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)
add $64, %ecx
add $64, %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
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)
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