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x86: Move wcslen SSE2 implementation to multiarch/wcslen-sse2.S

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This commit doesn't affect libc.so.6, its just housekeeping to prepare
for adding explicit ISA level support.

Tested build on x86_64 and x86_32 with/without multiarch.
This commit is contained in:
Noah Goldstein 2022-07-12 12:29:08 -07:00
parent 64479f11b7
commit e19bb87c97
2 changed files with 218 additions and 219 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

221
sysdeps/x86_64/multiarch/wcslen-sse2.S
View File

@ -17,10 +17,221 @@
<https://www.gnu.org/licenses/>. */
#if IS_IN (libc)
# define __wcslen __wcslen_sse2
# undef weak_alias
# define weak_alias(__wcslen, wcslen)
# ifndef WCSLEN
# define WCSLEN __wcslen_sse2
# endif
#endif
#include "../wcslen.S"
#include <sysdep.h>
.text
ENTRY (WCSLEN)
cmpl $0, (%rdi)
jz L(exit_tail0)
cmpl $0, 4(%rdi)
jz L(exit_tail1)
cmpl $0, 8(%rdi)
jz L(exit_tail2)
cmpl $0, 12(%rdi)
jz L(exit_tail3)
cmpl $0, 16(%rdi)
jz L(exit_tail4)
cmpl $0, 20(%rdi)
jz L(exit_tail5)
cmpl $0, 24(%rdi)
jz L(exit_tail6)
cmpl $0, 28(%rdi)
jz L(exit_tail7)
pxor %xmm0, %xmm0
lea 32(%rdi), %rax
addq $16, %rdi
and $-16, %rax
pcmpeqd (%rax), %xmm0
pmovmskb %xmm0, %edx
pxor %xmm1, %xmm1
addq $16, %rax
test %edx, %edx
jnz L(exit)
pcmpeqd (%rax), %xmm1
pmovmskb %xmm1, %edx
pxor %xmm2, %xmm2
addq $16, %rax
test %edx, %edx
jnz L(exit)
pcmpeqd (%rax), %xmm2
pmovmskb %xmm2, %edx
pxor %xmm3, %xmm3
addq $16, %rax
test %edx, %edx
jnz L(exit)
pcmpeqd (%rax), %xmm3
pmovmskb %xmm3, %edx
addq $16, %rax
test %edx, %edx
jnz L(exit)
pcmpeqd (%rax), %xmm0
pmovmskb %xmm0, %edx
addq $16, %rax
test %edx, %edx
jnz L(exit)
pcmpeqd (%rax), %xmm1
pmovmskb %xmm1, %edx
addq $16, %rax
test %edx, %edx
jnz L(exit)
pcmpeqd (%rax), %xmm2
pmovmskb %xmm2, %edx
addq $16, %rax
test %edx, %edx
jnz L(exit)
pcmpeqd (%rax), %xmm3
pmovmskb %xmm3, %edx
addq $16, %rax
test %edx, %edx
jnz L(exit)
pcmpeqd (%rax), %xmm0
pmovmskb %xmm0, %edx
addq $16, %rax
test %edx, %edx
jnz L(exit)
pcmpeqd (%rax), %xmm1
pmovmskb %xmm1, %edx
addq $16, %rax
test %edx, %edx
jnz L(exit)
pcmpeqd (%rax), %xmm2
pmovmskb %xmm2, %edx
addq $16, %rax
test %edx, %edx
jnz L(exit)
pcmpeqd (%rax), %xmm3
pmovmskb %xmm3, %edx
addq $16, %rax
test %edx, %edx
jnz L(exit)
and $-0x40, %rax
.p2align 4
L(aligned_64_loop):
movaps (%rax), %xmm0
movaps 16(%rax), %xmm1
movaps 32(%rax), %xmm2
movaps 48(%rax), %xmm6
pminub %xmm1, %xmm0
pminub %xmm6, %xmm2
pminub %xmm0, %xmm2
pcmpeqd %xmm3, %xmm2
pmovmskb %xmm2, %edx
addq $64, %rax
test %edx, %edx
jz L(aligned_64_loop)
pcmpeqd -64(%rax), %xmm3
pmovmskb %xmm3, %edx
addq $48, %rdi
test %edx, %edx
jnz L(exit)
pcmpeqd %xmm1, %xmm3
pmovmskb %xmm3, %edx
addq $-16, %rdi
test %edx, %edx
jnz L(exit)
pcmpeqd -32(%rax), %xmm3
pmovmskb %xmm3, %edx
addq $-16, %rdi
test %edx, %edx
jnz L(exit)
pcmpeqd %xmm6, %xmm3
pmovmskb %xmm3, %edx
addq $-16, %rdi
test %edx, %edx
jz L(aligned_64_loop)
.p2align 4
L(exit):
sub %rdi, %rax
shr $2, %rax
test %dl, %dl
jz L(exit_high)
andl $15, %edx
jz L(exit_1)
ret
/* No align here. Naturally aligned % 16 == 1. */
L(exit_high):
andl $(15 << 8), %edx
jz L(exit_3)
add $2, %rax
ret
.p2align 3
L(exit_1):
add $1, %rax
ret
.p2align 3
L(exit_3):
add $3, %rax
ret
.p2align 3
L(exit_tail0):
xorl %eax, %eax
ret
.p2align 3
L(exit_tail1):
movl $1, %eax
ret
.p2align 3
L(exit_tail2):
movl $2, %eax
ret
.p2align 3
L(exit_tail3):
movl $3, %eax
ret
.p2align 3
L(exit_tail4):
movl $4, %eax
ret
.p2align 3
L(exit_tail5):
movl $5, %eax
ret
.p2align 3
L(exit_tail6):
movl $6, %eax
ret
.p2align 3
L(exit_tail7):
movl $7, %eax
ret
END (WCSLEN)

216
sysdeps/x86_64/wcslen.S
View File

@ -16,218 +16,6 @@
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <sysdep.h>
.text
ENTRY (__wcslen)
cmpl $0, (%rdi)
jz L(exit_tail0)
cmpl $0, 4(%rdi)
jz L(exit_tail1)
cmpl $0, 8(%rdi)
jz L(exit_tail2)
cmpl $0, 12(%rdi)
jz L(exit_tail3)
cmpl $0, 16(%rdi)
jz L(exit_tail4)
cmpl $0, 20(%rdi)
jz L(exit_tail5)
cmpl $0, 24(%rdi)
jz L(exit_tail6)
cmpl $0, 28(%rdi)
jz L(exit_tail7)
pxor %xmm0, %xmm0
lea 32(%rdi), %rax
addq $16, %rdi
and $-16, %rax
pcmpeqd (%rax), %xmm0
pmovmskb %xmm0, %edx
pxor %xmm1, %xmm1
addq $16, %rax
test %edx, %edx
jnz L(exit)
pcmpeqd (%rax), %xmm1
pmovmskb %xmm1, %edx
pxor %xmm2, %xmm2
addq $16, %rax
test %edx, %edx
jnz L(exit)
pcmpeqd (%rax), %xmm2
pmovmskb %xmm2, %edx
pxor %xmm3, %xmm3
addq $16, %rax
test %edx, %edx
jnz L(exit)
pcmpeqd (%rax), %xmm3
pmovmskb %xmm3, %edx
addq $16, %rax
test %edx, %edx
jnz L(exit)
pcmpeqd (%rax), %xmm0
pmovmskb %xmm0, %edx
addq $16, %rax
test %edx, %edx
jnz L(exit)
pcmpeqd (%rax), %xmm1
pmovmskb %xmm1, %edx
addq $16, %rax
test %edx, %edx
jnz L(exit)
pcmpeqd (%rax), %xmm2
pmovmskb %xmm2, %edx
addq $16, %rax
test %edx, %edx
jnz L(exit)
pcmpeqd (%rax), %xmm3
pmovmskb %xmm3, %edx
addq $16, %rax
test %edx, %edx
jnz L(exit)
pcmpeqd (%rax), %xmm0
pmovmskb %xmm0, %edx
addq $16, %rax
test %edx, %edx
jnz L(exit)
pcmpeqd (%rax), %xmm1
pmovmskb %xmm1, %edx
addq $16, %rax
test %edx, %edx
jnz L(exit)
pcmpeqd (%rax), %xmm2
pmovmskb %xmm2, %edx
addq $16, %rax
test %edx, %edx
jnz L(exit)
pcmpeqd (%rax), %xmm3
pmovmskb %xmm3, %edx
addq $16, %rax
test %edx, %edx
jnz L(exit)
and $-0x40, %rax
.p2align 4
L(aligned_64_loop):
movaps (%rax), %xmm0
movaps 16(%rax), %xmm1
movaps 32(%rax), %xmm2
movaps 48(%rax), %xmm6
pminub %xmm1, %xmm0
pminub %xmm6, %xmm2
pminub %xmm0, %xmm2
pcmpeqd %xmm3, %xmm2
pmovmskb %xmm2, %edx
addq $64, %rax
test %edx, %edx
jz L(aligned_64_loop)
pcmpeqd -64(%rax), %xmm3
pmovmskb %xmm3, %edx
addq $48, %rdi
test %edx, %edx
jnz L(exit)
pcmpeqd %xmm1, %xmm3
pmovmskb %xmm3, %edx
addq $-16, %rdi
test %edx, %edx
jnz L(exit)
pcmpeqd -32(%rax), %xmm3
pmovmskb %xmm3, %edx
addq $-16, %rdi
test %edx, %edx
jnz L(exit)
pcmpeqd %xmm6, %xmm3
pmovmskb %xmm3, %edx
addq $-16, %rdi
test %edx, %edx
jz L(aligned_64_loop)
.p2align 4
L(exit):
sub %rdi, %rax
shr $2, %rax
test %dl, %dl
jz L(exit_high)
andl $15, %edx
jz L(exit_1)
ret
/* No align here. Naturally aligned % 16 == 1. */
L(exit_high):
andl $(15 << 8), %edx
jz L(exit_3)
add $2, %rax
ret
.p2align 3
L(exit_1):
add $1, %rax
ret
.p2align 3
L(exit_3):
add $3, %rax
ret
.p2align 3
L(exit_tail0):
xorl %eax, %eax
ret
.p2align 3
L(exit_tail1):
movl $1, %eax
ret
.p2align 3
L(exit_tail2):
movl $2, %eax
ret
.p2align 3
L(exit_tail3):
movl $3, %eax
ret
.p2align 3
L(exit_tail4):
movl $4, %eax
ret
.p2align 3
L(exit_tail5):
movl $5, %eax
ret
.p2align 3
L(exit_tail6):
movl $6, %eax
ret
.p2align 3
L(exit_tail7):
movl $7, %eax
ret
END (__wcslen)
#define WCSLEN __wcslen
#include "multiarch/wcslen-sse2.S"
weak_alias(__wcslen, wcslen)