[glibc] x86: Move wcschr SSE2 implementation to multiarch/wcschr-sse2.S

[glibc] x86: Move wcschr SSE2 implementation to multiarch/wcschr-sse2.S

[Noah Goldstein]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=64479f11b721fa33d17d623db31d047a11f363a1

commit 64479f11b721fa33d17d623db31d047a11f363a1
Author: Noah Goldstein <goldstein.w.n@gmail.com>
Date:   Tue Jul 12 12:29:07 2022 -0700

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

Diff:
---
 sysdeps/x86_64/multiarch/wcschr-sse2.S | 145 +++++++++++++++++++++++++++++++--
 sysdeps/x86_64/wcschr.S                | 135 +-----------------------------
 2 files changed, 138 insertions(+), 142 deletions(-)

diff --git a/sysdeps/x86_64/multiarch/wcschr-sse2.S b/sysdeps/x86_64/multiarch/wcschr-sse2.S
index 218ea609b9..c872926ba9 100644
--- a/sysdeps/x86_64/multiarch/wcschr-sse2.S
+++ b/sysdeps/x86_64/multiarch/wcschr-sse2.S
@@ -17,14 +17,141 @@
    <https://www.gnu.org/licenses/>.  */
 
 #if IS_IN (libc)
-# define __wcschr __wcschr_sse2
-
-# undef weak_alias
-# define weak_alias(__wcschr, wcschr)
-# undef libc_hidden_def
-# define libc_hidden_def(__wcschr)
-# undef libc_hidden_weak
-# define libc_hidden_weak(wcschr)
+# ifndef WCSCHR
+#  define WCSCHR __wcschr_sse2
+# endif
 #endif
 
-#include "../wcschr.S"
+#include <sysdep.h>
+
+	.text
+ENTRY (WCSCHR)
+
+	movd	%rsi, %xmm1
+	pxor	%xmm2, %xmm2
+	mov	%rdi, %rcx
+	punpckldq %xmm1, %xmm1
+	punpckldq %xmm1, %xmm1
+
+	and	$63, %rcx
+	cmp	$48, %rcx
+	ja	L(cross_cache)
+
+	movdqu	(%rdi), %xmm0
+	pcmpeqd	%xmm0, %xmm2
+	add	$16, %rdi
+	pcmpeqd	%xmm1, %xmm0
+	pmovmskb %xmm2, %rdx
+	pmovmskb %xmm0, %rax
+	or	%rax, %rdx
+	jnz	L(matches)
+
+	and	$-16, %rdi
+
+	movdqa	(%rdi), %xmm0
+	pcmpeqd	%xmm0, %xmm2
+	add	$16, %rdi
+	pcmpeqd	%xmm1, %xmm0
+	pmovmskb %xmm2, %rdx
+	pmovmskb %xmm0, %rax
+	or	%rax, %rdx
+	jnz	L(matches)
+
+	jmp	L(loop)
+
+L(cross_cache):
+	and	$15, %rcx
+	and	$-16, %rdi
+	movdqa	(%rdi), %xmm0
+	pcmpeqd	%xmm0, %xmm2
+	pcmpeqd	%xmm1, %xmm0
+	pmovmskb %xmm2, %rdx
+	pmovmskb %xmm0, %rax
+
+	sar	%cl, %rdx
+	sar	%cl, %rax
+	test	%rax, %rax
+	je	L(unaligned_no_match)
+
+	bsf	%rax, %rax
+	test	%rdx, %rdx
+	je	L(unaligned_match)
+	bsf	%rdx, %rdx
+	cmp	%rdx, %rax
+	ja	L(return_null)
+
+L(unaligned_match):
+	add	%rdi, %rax
+	add	%rcx, %rax
+	ret
+
+	.p2align 4
+L(unaligned_no_match):
+	test	%rdx, %rdx
+	jne	L(return_null)
+	pxor	%xmm2, %xmm2
+
+	add	$16, %rdi
+
+	.p2align 4
+/* Loop start on aligned string.  */
+L(loop):
+	movdqa	(%rdi), %xmm0
+	pcmpeqd	%xmm0, %xmm2
+	add	$16, %rdi
+	pcmpeqd	%xmm1, %xmm0
+	pmovmskb %xmm2, %rdx
+	pmovmskb %xmm0, %rax
+	or	%rax, %rdx
+	jnz	L(matches)
+
+	movdqa	(%rdi), %xmm0
+	pcmpeqd	%xmm0, %xmm2
+	add	$16, %rdi
+	pcmpeqd	%xmm1, %xmm0
+	pmovmskb %xmm2, %rdx
+	pmovmskb %xmm0, %rax
+	or	%rax, %rdx
+	jnz	L(matches)
+
+	movdqa	(%rdi), %xmm0
+	pcmpeqd	%xmm0, %xmm2
+	add	$16, %rdi
+	pcmpeqd	%xmm1, %xmm0
+	pmovmskb %xmm2, %rdx
+	pmovmskb %xmm0, %rax
+	or	%rax, %rdx
+	jnz	L(matches)
+
+	movdqa	(%rdi), %xmm0
+	pcmpeqd	%xmm0, %xmm2
+	add	$16, %rdi
+	pcmpeqd	%xmm1, %xmm0
+	pmovmskb %xmm2, %rdx
+	pmovmskb %xmm0, %rax
+	or	%rax, %rdx
+	jnz	L(matches)
+	jmp	L(loop)
+
+	.p2align 4
+L(matches):
+	pmovmskb %xmm2, %rdx
+	test	%rax, %rax
+	jz	L(return_null)
+	bsf	%rax, %rax
+	test	%rdx, %rdx
+	je	L(match)
+	bsf	%rdx, %rcx
+	cmp	%rcx, %rax
+	ja	L(return_null)
+L(match):
+	sub	$16, %rdi
+	add	%rdi, %rax
+	ret
+
+	.p2align 4
+L(return_null):
+	xor	%rax, %rax
+	ret
+
+END (WCSCHR)
diff --git a/sysdeps/x86_64/wcschr.S b/sysdeps/x86_64/wcschr.S
index 2131220382..80b12c4286 100644
--- a/sysdeps/x86_64/wcschr.S
+++ b/sysdeps/x86_64/wcschr.S
@@ -16,140 +16,9 @@
    License along with the GNU C Library; if not, see
    <https://www.gnu.org/licenses/>.  */
 
-#include <sysdep.h>
-
-	.text
-ENTRY (__wcschr)
-
-	movd	%rsi, %xmm1
-	pxor	%xmm2, %xmm2
-	mov	%rdi, %rcx
-	punpckldq %xmm1, %xmm1
-	punpckldq %xmm1, %xmm1
-
-	and	$63, %rcx
-	cmp	$48, %rcx
-	ja	L(cross_cache)
-
-	movdqu	(%rdi), %xmm0
-	pcmpeqd	%xmm0, %xmm2
-	add	$16, %rdi
-	pcmpeqd	%xmm1, %xmm0
-	pmovmskb %xmm2, %rdx
-	pmovmskb %xmm0, %rax
-	or	%rax, %rdx
-	jnz	L(matches)
-
-	and	$-16, %rdi
-
-	movdqa	(%rdi), %xmm0
-	pcmpeqd	%xmm0, %xmm2
-	add	$16, %rdi
-	pcmpeqd	%xmm1, %xmm0
-	pmovmskb %xmm2, %rdx
-	pmovmskb %xmm0, %rax
-	or	%rax, %rdx
-	jnz	L(matches)
-
-	jmp	L(loop)
-
-L(cross_cache):
-	and	$15, %rcx
-	and	$-16, %rdi
-	movdqa	(%rdi), %xmm0
-	pcmpeqd	%xmm0, %xmm2
-	pcmpeqd	%xmm1, %xmm0
-	pmovmskb %xmm2, %rdx
-	pmovmskb %xmm0, %rax
-
-	sar	%cl, %rdx
-	sar	%cl, %rax
-	test	%rax, %rax
-	je	L(unaligned_no_match)
-
-	bsf	%rax, %rax
-	test	%rdx, %rdx
-	je	L(unaligned_match)
-	bsf	%rdx, %rdx
-	cmp	%rdx, %rax
-	ja	L(return_null)
-
-L(unaligned_match):
-	add	%rdi, %rax
-	add	%rcx, %rax
-	ret
-
-	.p2align 4
-L(unaligned_no_match):
-	test	%rdx, %rdx
-	jne	L(return_null)
-	pxor	%xmm2, %xmm2
-
-	add	$16, %rdi
-
-	.p2align 4
-/* Loop start on aligned string.  */
-L(loop):
-	movdqa	(%rdi), %xmm0
-	pcmpeqd	%xmm0, %xmm2
-	add	$16, %rdi
-	pcmpeqd	%xmm1, %xmm0
-	pmovmskb %xmm2, %rdx
-	pmovmskb %xmm0, %rax
-	or	%rax, %rdx
-	jnz	L(matches)
-
-	movdqa	(%rdi), %xmm0
-	pcmpeqd	%xmm0, %xmm2
-	add	$16, %rdi
-	pcmpeqd	%xmm1, %xmm0
-	pmovmskb %xmm2, %rdx
-	pmovmskb %xmm0, %rax
-	or	%rax, %rdx
-	jnz	L(matches)
-
-	movdqa	(%rdi), %xmm0
-	pcmpeqd	%xmm0, %xmm2
-	add	$16, %rdi
-	pcmpeqd	%xmm1, %xmm0
-	pmovmskb %xmm2, %rdx
-	pmovmskb %xmm0, %rax
-	or	%rax, %rdx
-	jnz	L(matches)
-
-	movdqa	(%rdi), %xmm0
-	pcmpeqd	%xmm0, %xmm2
-	add	$16, %rdi
-	pcmpeqd	%xmm1, %xmm0
-	pmovmskb %xmm2, %rdx
-	pmovmskb %xmm0, %rax
-	or	%rax, %rdx
-	jnz	L(matches)
-	jmp	L(loop)
-
-	.p2align 4
-L(matches):
-	pmovmskb %xmm2, %rdx
-	test	%rax, %rax
-	jz	L(return_null)
-	bsf	%rax, %rax
-	test	%rdx, %rdx
-	je	L(match)
-	bsf	%rdx, %rcx
-	cmp	%rcx, %rax
-	ja	L(return_null)
-L(match):
-	sub	$16, %rdi
-	add	%rdi, %rax
-	ret
-
-	.p2align 4
-L(return_null):
-	xor	%rax, %rax
-	ret
-
-END (__wcschr)
 
+#define WCSCHR	__wcschr
+#include "multiarch/wcschr-sse2.S"
 libc_hidden_def(__wcschr)
 weak_alias (__wcschr, wcschr)
 libc_hidden_weak (wcschr)