From: Noah Goldstein <goldstein.w.n@gmail.com>
To: libc-alpha@sourceware.org
Subject: [PATCH v1] x86: Move wcschr SSE2 implementation to multiarch/wcschr-sse2.S
Date: Tue, 12 Jul 2022 12:29:07 -0700 [thread overview]
Message-ID: <20220712192910.351121-7-goldstein.w.n@gmail.com> (raw)
In-Reply-To: <20220712192910.351121-1-goldstein.w.n@gmail.com>
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.
---
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)
--
2.34.1
next prev parent reply other threads:[~2022-07-12 19:29 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-12 19:29 [PATCH v1] x86: Move strlen SSE2 implementation to multiarch/strlen-sse2.S Noah Goldstein
2022-07-12 19:29 ` [PATCH v1] x86: Move strcpy SSE2 implementation to multiarch/strcpy-sse2.S Noah Goldstein
2022-07-12 23:23 ` H.J. Lu
2022-07-12 19:29 ` [PATCH v1] x86: Move memrchr SSE2 implementation to multiarch/memrchr-sse2.S Noah Goldstein
2022-07-12 22:58 ` H.J. Lu
2022-07-12 19:29 ` [PATCH v1] x86: Move strrchr SSE2 implementation to multiarch/strrchr-sse2.S Noah Goldstein
2022-07-12 22:28 ` H.J. Lu
2022-07-12 19:29 ` [PATCH v1] x86: Move strchr SSE2 implementation to multiarch/strchr-sse2.S Noah Goldstein
2022-07-12 21:27 ` H.J. Lu
2022-07-12 19:29 ` [PATCH v1] x86: Move strcat SSE2 implementation to multiarch/strcat-sse2.S Noah Goldstein
2022-07-12 21:16 ` H.J. Lu
2022-07-12 19:29 ` Noah Goldstein [this message]
2022-07-12 20:55 ` [PATCH v1] x86: Move wcschr SSE2 implementation to multiarch/wcschr-sse2.S H.J. Lu
2022-07-12 19:29 ` [PATCH v1] x86: Move wcslen SSE2 implementation to multiarch/wcslen-sse2.S Noah Goldstein
2022-07-12 20:26 ` H.J. Lu
2022-07-12 19:29 ` [PATCH v1] x86: Remove unneeded rtld-wmemcmp Noah Goldstein
2022-07-12 19:44 ` H.J. Lu
2022-07-12 19:29 ` [PATCH v1] x86: Add missing rtm tests for strcmp family Noah Goldstein
2022-07-12 19:59 ` H.J. Lu
2022-07-12 23:29 ` [PATCH v1] x86: Move strlen SSE2 implementation to multiarch/strlen-sse2.S H.J. Lu
2022-07-13 4:06 ` Noah Goldstein
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