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References: <20220712192808.335531-1-goldstein.w.n@gmail.com>
 <20220712192808.335531-3-goldstein.w.n@gmail.com>
In-Reply-To: <20220712192808.335531-3-goldstein.w.n@gmail.com>
From: "H.J. Lu" <hjl.tools@gmail.com>
Date: Tue, 12 Jul 2022 17:05:18 -0700
Message-ID: <CAMe9rOqFL29Y-1etWTFjbzhcH8_43ss6wmWfZ8b_78B65yOA=A@mail.gmail.com>
Subject: Re: [PATCH v1 3/4] x86: Move wcscmp SSE2 implementation to
 multiarch/wcscmp-sse2.S
To: Noah Goldstein <goldstein.w.n@gmail.com>
Cc: GNU C Library <libc-alpha@sourceware.org>,
 "Carlos O'Donell" <carlos@systemhalted.org>
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On Tue, Jul 12, 2022 at 12:28 PM Noah Goldstein <goldstein.w.n@gmail.com> wrote:
>
> 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/wcscmp-sse2.S | 936 ++++++++++++++++++++++++-
>  sysdeps/x86_64/wcscmp.S                | 932 +-----------------------
>  2 files changed, 934 insertions(+), 934 deletions(-)
>
> diff --git a/sysdeps/x86_64/multiarch/wcscmp-sse2.S b/sysdeps/x86_64/multiarch/wcscmp-sse2.S
> index 72a19bd64d..6cb7d9faf9 100644
> --- a/sysdeps/x86_64/multiarch/wcscmp-sse2.S
> +++ b/sysdeps/x86_64/multiarch/wcscmp-sse2.S
> @@ -16,8 +16,936 @@
>     License along with the GNU C Library; if not, see
>     <https://www.gnu.org/licenses/>.  */
>
> -#if IS_IN (libc)
> -# define __wcscmp __wcscmp_sse2
> -#endif
> +#define USE_AS_WCSCMP
> +#define STRCMP_ISA     _sse2
> +#include "strcmp-naming.h"
>
> -#include "../wcscmp.S"
> +#include <sysdep.h>
> +
> +/* Note: wcscmp uses signed comparison, not unsighed as in strcmp function. */
> +
> +       .text
> +ENTRY (STRCMP)
> +/*
> +       * This implementation uses SSE to compare up to 16 bytes at a time.
> +*/
> +       mov     %esi, %eax
> +       mov     %edi, %edx
> +       pxor    %xmm0, %xmm0            /* clear %xmm0 for null char checks */
> +       mov     %al, %ch
> +       mov     %dl, %cl
> +       and     $63, %eax               /* rsi alignment in cache line */
> +       and     $63, %edx               /* rdi alignment in cache line */
> +       and     $15, %cl
> +       jz      L(continue_00)
> +       cmp     $16, %edx
> +       jb      L(continue_0)
> +       cmp     $32, %edx
> +       jb      L(continue_16)
> +       cmp     $48, %edx
> +       jb      L(continue_32)
> +
> +L(continue_48):
> +       and     $15, %ch
> +       jz      L(continue_48_00)
> +       cmp     $16, %eax
> +       jb      L(continue_0_48)
> +       cmp     $32, %eax
> +       jb      L(continue_16_48)
> +       cmp     $48, %eax
> +       jb      L(continue_32_48)
> +
> +       .p2align 4
> +L(continue_48_48):
> +       mov     (%rsi), %ecx
> +       cmp     %ecx, (%rdi)
> +       jne     L(nequal)
> +       test    %ecx, %ecx
> +       jz      L(equal)
> +
> +       mov     4(%rsi), %ecx
> +       cmp     %ecx, 4(%rdi)
> +       jne     L(nequal)
> +       test    %ecx, %ecx
> +       jz      L(equal)
> +
> +       mov     8(%rsi), %ecx
> +       cmp     %ecx, 8(%rdi)
> +       jne     L(nequal)
> +       test    %ecx, %ecx
> +       jz      L(equal)
> +
> +       mov     12(%rsi), %ecx
> +       cmp     %ecx, 12(%rdi)
> +       jne     L(nequal)
> +       test    %ecx, %ecx
> +       jz      L(equal)
> +
> +       movdqu  16(%rdi), %xmm1
> +       movdqu  16(%rsi), %xmm2
> +       pcmpeqd %xmm1, %xmm0            /* Any null double_word? */
> +       pcmpeqd %xmm2, %xmm1            /* compare first 4 double_words for equality */
> +       psubb   %xmm0, %xmm1            /* packed sub of comparison results*/
> +       pmovmskb %xmm1, %edx
> +       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> +       jnz     L(less4_double_words_16)
> +
> +       movdqu  32(%rdi), %xmm1
> +       movdqu  32(%rsi), %xmm2
> +       pcmpeqd %xmm1, %xmm0            /* Any null double_word? */
> +       pcmpeqd %xmm2, %xmm1            /* compare first 4 double_words for equality */
> +       psubb   %xmm0, %xmm1            /* packed sub of comparison results*/
> +       pmovmskb %xmm1, %edx
> +       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> +       jnz     L(less4_double_words_32)
> +
> +       movdqu  48(%rdi), %xmm1
> +       movdqu  48(%rsi), %xmm2
> +       pcmpeqd %xmm1, %xmm0            /* Any null double_word? */
> +       pcmpeqd %xmm2, %xmm1            /* compare first 4 double_words for equality */
> +       psubb   %xmm0, %xmm1            /* packed sub of comparison results*/
> +       pmovmskb %xmm1, %edx
> +       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> +       jnz     L(less4_double_words_48)
> +
> +       add     $64, %rsi
> +       add     $64, %rdi
> +       jmp     L(continue_48_48)
> +
> +L(continue_0):
> +       and     $15, %ch
> +       jz      L(continue_0_00)
> +       cmp     $16, %eax
> +       jb      L(continue_0_0)
> +       cmp     $32, %eax
> +       jb      L(continue_0_16)
> +       cmp     $48, %eax
> +       jb      L(continue_0_32)
> +
> +       .p2align 4
> +L(continue_0_48):
> +       mov     (%rsi), %ecx
> +       cmp     %ecx, (%rdi)
> +       jne     L(nequal)
> +       test    %ecx, %ecx
> +       jz      L(equal)
> +
> +       mov     4(%rsi), %ecx
> +       cmp     %ecx, 4(%rdi)
> +       jne     L(nequal)
> +       test    %ecx, %ecx
> +       jz      L(equal)
> +
> +       mov     8(%rsi), %ecx
> +       cmp     %ecx, 8(%rdi)
> +       jne     L(nequal)
> +       test    %ecx, %ecx
> +       jz      L(equal)
> +
> +       mov     12(%rsi), %ecx
> +       cmp     %ecx, 12(%rdi)
> +       jne     L(nequal)
> +       test    %ecx, %ecx
> +       jz      L(equal)
> +
> +       movdqu  16(%rdi), %xmm1
> +       movdqu  16(%rsi), %xmm2
> +       pcmpeqd %xmm1, %xmm0            /* Any null double_word? */
> +       pcmpeqd %xmm2, %xmm1            /* compare first 4 double_words for equality */
> +       psubb   %xmm0, %xmm1            /* packed sub of comparison results*/
> +       pmovmskb %xmm1, %edx
> +       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> +       jnz     L(less4_double_words_16)
> +
> +       movdqu  32(%rdi), %xmm1
> +       movdqu  32(%rsi), %xmm2
> +       pcmpeqd %xmm1, %xmm0            /* Any null double_word? */
> +       pcmpeqd %xmm2, %xmm1            /* compare first 4 double_words for equality */
> +       psubb   %xmm0, %xmm1            /* packed sub of comparison results*/
> +       pmovmskb %xmm1, %edx
> +       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> +       jnz     L(less4_double_words_32)
> +
> +       mov     48(%rsi), %ecx
> +       cmp     %ecx, 48(%rdi)
> +       jne     L(nequal)
> +       test    %ecx, %ecx
> +       jz      L(equal)
> +
> +       mov     52(%rsi), %ecx
> +       cmp     %ecx, 52(%rdi)
> +       jne     L(nequal)
> +       test    %ecx, %ecx
> +       jz      L(equal)
> +
> +       mov     56(%rsi), %ecx
> +       cmp     %ecx, 56(%rdi)
> +       jne     L(nequal)
> +       test    %ecx, %ecx
> +       jz      L(equal)
> +
> +       mov     60(%rsi), %ecx
> +       cmp     %ecx, 60(%rdi)
> +       jne     L(nequal)
> +       test    %ecx, %ecx
> +       jz      L(equal)
> +
> +       add     $64, %rsi
> +       add     $64, %rdi
> +       jmp     L(continue_0_48)
> +
> +       .p2align 4
> +L(continue_00):
> +       and     $15, %ch
> +       jz      L(continue_00_00)
> +       cmp     $16, %eax
> +       jb      L(continue_00_0)
> +       cmp     $32, %eax
> +       jb      L(continue_00_16)
> +       cmp     $48, %eax
> +       jb      L(continue_00_32)
> +
> +       .p2align 4
> +L(continue_00_48):
> +       pcmpeqd (%rdi), %xmm0
> +       mov     (%rdi), %eax
> +       pmovmskb %xmm0, %ecx
> +       test    %ecx, %ecx
> +       jnz     L(less4_double_words1)
> +
> +       cmp     (%rsi), %eax
> +       jne     L(nequal)
> +
> +       mov     4(%rdi), %eax
> +       cmp     4(%rsi), %eax
> +       jne     L(nequal)
> +
> +       mov     8(%rdi), %eax
> +       cmp     8(%rsi), %eax
> +       jne     L(nequal)
> +
> +       mov     12(%rdi), %eax
> +       cmp     12(%rsi), %eax
> +       jne     L(nequal)
> +
> +       movdqu  16(%rsi), %xmm2
> +       pcmpeqd %xmm2, %xmm0            /* Any null double_word? */
> +       pcmpeqd 16(%rdi), %xmm2         /* compare first 4 double_words for equality */
> +       psubb   %xmm0, %xmm2            /* packed sub of comparison results*/
> +       pmovmskb %xmm2, %edx
> +       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> +       jnz     L(less4_double_words_16)
> +
> +       movdqu  32(%rsi), %xmm2
> +       pcmpeqd %xmm2, %xmm0            /* Any null double_word? */
> +       pcmpeqd 32(%rdi), %xmm2         /* compare first 4 double_words for equality */
> +       psubb   %xmm0, %xmm2            /* packed sub of comparison results*/
> +       pmovmskb %xmm2, %edx
> +       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> +       jnz     L(less4_double_words_32)
> +
> +       movdqu  48(%rsi), %xmm2
> +       pcmpeqd %xmm2, %xmm0            /* Any null double_word? */
> +       pcmpeqd 48(%rdi), %xmm2         /* compare first 4 double_words for equality */
> +       psubb   %xmm0, %xmm2            /* packed sub of comparison results*/
> +       pmovmskb %xmm2, %edx
> +       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> +       jnz     L(less4_double_words_48)
> +
> +       add     $64, %rsi
> +       add     $64, %rdi
> +       jmp     L(continue_00_48)
> +
> +       .p2align 4
> +L(continue_32):
> +       and     $15, %ch
> +       jz      L(continue_32_00)
> +       cmp     $16, %eax
> +       jb      L(continue_0_32)
> +       cmp     $32, %eax
> +       jb      L(continue_16_32)
> +       cmp     $48, %eax
> +       jb      L(continue_32_32)
> +
> +       .p2align 4
> +L(continue_32_48):
> +       mov     (%rsi), %ecx
> +       cmp     %ecx, (%rdi)
> +       jne     L(nequal)
> +       test    %ecx, %ecx
> +       jz      L(equal)
> +
> +       mov     4(%rsi), %ecx
> +       cmp     %ecx, 4(%rdi)
> +       jne     L(nequal)
> +       test    %ecx, %ecx
> +       jz      L(equal)
> +
> +       mov     8(%rsi), %ecx
> +       cmp     %ecx, 8(%rdi)
> +       jne     L(nequal)
> +       test    %ecx, %ecx
> +       jz      L(equal)
> +
> +       mov     12(%rsi), %ecx
> +       cmp     %ecx, 12(%rdi)
> +       jne     L(nequal)
> +       test    %ecx, %ecx
> +       jz      L(equal)
> +
> +       mov     16(%rsi), %ecx
> +       cmp     %ecx, 16(%rdi)
> +       jne     L(nequal)
> +       test    %ecx, %ecx
> +       jz      L(equal)
> +
> +       mov     20(%rsi), %ecx
> +       cmp     %ecx, 20(%rdi)
> +       jne     L(nequal)
> +       test    %ecx, %ecx
> +       jz      L(equal)
> +
> +       mov     24(%rsi), %ecx
> +       cmp     %ecx, 24(%rdi)
> +       jne     L(nequal)
> +       test    %ecx, %ecx
> +       jz      L(equal)
> +
> +       mov     28(%rsi), %ecx
> +       cmp     %ecx, 28(%rdi)
> +       jne     L(nequal)
> +       test    %ecx, %ecx
> +       jz      L(equal)
> +
> +       movdqu  32(%rdi), %xmm1
> +       movdqu  32(%rsi), %xmm2
> +       pcmpeqd %xmm1, %xmm0            /* Any null double_word? */
> +       pcmpeqd %xmm2, %xmm1            /* compare first 4 double_words for equality */
> +       psubb   %xmm0, %xmm1            /* packed sub of comparison results*/
> +       pmovmskb %xmm1, %edx
> +       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> +       jnz     L(less4_double_words_32)
> +
> +       movdqu  48(%rdi), %xmm1
> +       movdqu  48(%rsi), %xmm2
> +       pcmpeqd %xmm1, %xmm0            /* Any null double_word? */
> +       pcmpeqd %xmm2, %xmm1            /* compare first 4 double_words for equality */
> +       psubb   %xmm0, %xmm1            /* packed sub of comparison results*/
> +       pmovmskb %xmm1, %edx
> +       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> +       jnz     L(less4_double_words_48)
> +
> +       add     $64, %rsi
> +       add     $64, %rdi
> +       jmp     L(continue_32_48)
> +
> +       .p2align 4
> +L(continue_16):
> +       and     $15, %ch
> +       jz      L(continue_16_00)
> +       cmp     $16, %eax
> +       jb      L(continue_0_16)
> +       cmp     $32, %eax
> +       jb      L(continue_16_16)
> +       cmp     $48, %eax
> +       jb      L(continue_16_32)
> +
> +       .p2align 4
> +L(continue_16_48):
> +       mov     (%rsi), %ecx
> +       cmp     %ecx, (%rdi)
> +       jne     L(nequal)
> +       test    %ecx, %ecx
> +       jz      L(equal)
> +
> +       mov     4(%rsi), %ecx
> +       cmp     %ecx, 4(%rdi)
> +       jne     L(nequal)
> +       test    %ecx, %ecx
> +       jz      L(equal)
> +
> +       mov     8(%rsi), %ecx
> +       cmp     %ecx, 8(%rdi)
> +       jne     L(nequal)
> +       test    %ecx, %ecx
> +       jz      L(equal)
> +
> +       mov     12(%rsi), %ecx
> +       cmp     %ecx, 12(%rdi)
> +       jne     L(nequal)
> +       test    %ecx, %ecx
> +       jz      L(equal)
> +
> +       movdqu  16(%rdi), %xmm1
> +       movdqu  16(%rsi), %xmm2
> +       pcmpeqd %xmm1, %xmm0            /* Any null double_word? */
> +       pcmpeqd %xmm2, %xmm1            /* compare first 4 double_words for equality */
> +       psubb   %xmm0, %xmm1            /* packed sub of comparison results*/
> +       pmovmskb %xmm1, %edx
> +       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> +       jnz     L(less4_double_words_16)
> +
> +       mov     32(%rsi), %ecx
> +       cmp     %ecx, 32(%rdi)
> +       jne     L(nequal)
> +       test    %ecx, %ecx
> +       jz      L(equal)
> +
> +       mov     36(%rsi), %ecx
> +       cmp     %ecx, 36(%rdi)
> +       jne     L(nequal)
> +       test    %ecx, %ecx
> +       jz      L(equal)
> +
> +       mov     40(%rsi), %ecx
> +       cmp     %ecx, 40(%rdi)
> +       jne     L(nequal)
> +       test    %ecx, %ecx
> +       jz      L(equal)
> +
> +       mov     44(%rsi), %ecx
> +       cmp     %ecx, 44(%rdi)
> +       jne     L(nequal)
> +       test    %ecx, %ecx
> +       jz      L(equal)
> +
> +       movdqu  48(%rdi), %xmm1
> +       movdqu  48(%rsi), %xmm2
> +       pcmpeqd %xmm1, %xmm0            /* Any null double_word? */
> +       pcmpeqd %xmm2, %xmm1            /* compare first 4 double_words for equality */
> +       psubb   %xmm0, %xmm1            /* packed sub of comparison results*/
> +       pmovmskb %xmm1, %edx
> +       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> +       jnz     L(less4_double_words_48)
> +
> +       add     $64, %rsi
> +       add     $64, %rdi
> +       jmp     L(continue_16_48)
> +
> +       .p2align 4
> +L(continue_00_00):
> +       movdqa  (%rdi), %xmm1
> +       pcmpeqd %xmm1, %xmm0            /* Any null double_word? */
> +       pcmpeqd (%rsi), %xmm1           /* compare first 4 double_words for equality */
> +       psubb   %xmm0, %xmm1            /* packed sub of comparison results*/
> +       pmovmskb %xmm1, %edx
> +       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> +       jnz     L(less4_double_words)
> +
> +       movdqa  16(%rdi), %xmm3
> +       pcmpeqd %xmm3, %xmm0            /* Any null double_word? */
> +       pcmpeqd 16(%rsi), %xmm3         /* compare first 4 double_words for equality */
> +       psubb   %xmm0, %xmm3            /* packed sub of comparison results*/
> +       pmovmskb %xmm3, %edx
> +       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> +       jnz     L(less4_double_words_16)
> +
> +       movdqa  32(%rdi), %xmm5
> +       pcmpeqd %xmm5, %xmm0            /* Any null double_word? */
> +       pcmpeqd 32(%rsi), %xmm5         /* compare first 4 double_words for equality */
> +       psubb   %xmm0, %xmm5            /* packed sub of comparison results*/
> +       pmovmskb %xmm5, %edx
> +       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> +       jnz     L(less4_double_words_32)
> +
> +       movdqa  48(%rdi), %xmm1
> +       pcmpeqd %xmm1, %xmm0            /* Any null double_word? */
> +       pcmpeqd 48(%rsi), %xmm1         /* compare first 4 double_words for equality */
> +       psubb   %xmm0, %xmm1            /* packed sub of comparison results*/
> +       pmovmskb %xmm1, %edx
> +       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> +       jnz     L(less4_double_words_48)
> +
> +       add     $64, %rsi
> +       add     $64, %rdi
> +       jmp     L(continue_00_00)
> +
> +       .p2align 4
> +L(continue_00_32):
> +       movdqu  (%rsi), %xmm2
> +       pcmpeqd %xmm2, %xmm0            /* Any null double_word? */
> +       pcmpeqd (%rdi), %xmm2           /* compare first 4 double_words for equality */
> +       psubb   %xmm0, %xmm2            /* packed sub of comparison results*/
> +       pmovmskb %xmm2, %edx
> +       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> +       jnz     L(less4_double_words)
> +
> +       add     $16, %rsi
> +       add     $16, %rdi
> +       jmp     L(continue_00_48)
> +
> +       .p2align 4
> +L(continue_00_16):
> +       movdqu  (%rsi), %xmm2
> +       pcmpeqd %xmm2, %xmm0            /* Any null double_word? */
> +       pcmpeqd (%rdi), %xmm2           /* compare first 4 double_words for equality */
> +       psubb   %xmm0, %xmm2            /* packed sub of comparison results*/
> +       pmovmskb %xmm2, %edx
> +       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> +       jnz     L(less4_double_words)
> +
> +       movdqu  16(%rsi), %xmm2
> +       pcmpeqd %xmm2, %xmm0            /* Any null double_word? */
> +       pcmpeqd 16(%rdi), %xmm2         /* compare first 4 double_words for equality */
> +       psubb   %xmm0, %xmm2            /* packed sub of comparison results*/
> +       pmovmskb %xmm2, %edx
> +       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> +       jnz     L(less4_double_words_16)
> +
> +       add     $32, %rsi
> +       add     $32, %rdi
> +       jmp     L(continue_00_48)
> +
> +       .p2align 4
> +L(continue_00_0):
> +       movdqu  (%rsi), %xmm2
> +       pcmpeqd %xmm2, %xmm0            /* Any null double_word? */
> +       pcmpeqd (%rdi), %xmm2           /* compare first 4 double_words for equality */
> +       psubb   %xmm0, %xmm2            /* packed sub of comparison results*/
> +       pmovmskb %xmm2, %edx
> +       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> +       jnz     L(less4_double_words)
> +
> +       movdqu  16(%rsi), %xmm2
> +       pcmpeqd %xmm2, %xmm0            /* Any null double_word? */
> +       pcmpeqd 16(%rdi), %xmm2         /* compare first 4 double_words for equality */
> +       psubb   %xmm0, %xmm2            /* packed sub of comparison results*/
> +       pmovmskb %xmm2, %edx
> +       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> +       jnz     L(less4_double_words_16)
> +
> +       movdqu  32(%rsi), %xmm2
> +       pcmpeqd %xmm2, %xmm0            /* Any null double_word? */
> +       pcmpeqd 32(%rdi), %xmm2         /* compare first 4 double_words for equality */
> +       psubb   %xmm0, %xmm2            /* packed sub of comparison results*/
> +       pmovmskb %xmm2, %edx
> +       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> +       jnz     L(less4_double_words_32)
> +
> +       add     $48, %rsi
> +       add     $48, %rdi
> +       jmp     L(continue_00_48)
> +
> +       .p2align 4
> +L(continue_48_00):
> +       pcmpeqd (%rsi), %xmm0
> +       mov     (%rdi), %eax
> +       pmovmskb %xmm0, %ecx
> +       test    %ecx, %ecx
> +       jnz     L(less4_double_words1)
> +
> +       cmp     (%rsi), %eax
> +       jne     L(nequal)
> +
> +       mov     4(%rdi), %eax
> +       cmp     4(%rsi), %eax
> +       jne     L(nequal)
> +
> +       mov     8(%rdi), %eax
> +       cmp     8(%rsi), %eax
> +       jne     L(nequal)
> +
> +       mov     12(%rdi), %eax
> +       cmp     12(%rsi), %eax
> +       jne     L(nequal)
> +
> +       movdqu  16(%rdi), %xmm1
> +       pcmpeqd %xmm1, %xmm0            /* Any null double_word? */
> +       pcmpeqd 16(%rsi), %xmm1         /* compare first 4 double_words for equality */
> +       psubb   %xmm0, %xmm1            /* packed sub of comparison results*/
> +       pmovmskb %xmm1, %edx
> +       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> +       jnz     L(less4_double_words_16)
> +
> +       movdqu  32(%rdi), %xmm1
> +       pcmpeqd %xmm1, %xmm0            /* Any null double_word? */
> +       pcmpeqd 32(%rsi), %xmm1         /* compare first 4 double_words for equality */
> +       psubb   %xmm0, %xmm1            /* packed sub of comparison results*/
> +       pmovmskb %xmm1, %edx
> +       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> +       jnz     L(less4_double_words_32)
> +
> +       movdqu  48(%rdi), %xmm1
> +       pcmpeqd %xmm1, %xmm0            /* Any null double_word? */
> +       pcmpeqd 48(%rsi), %xmm1         /* compare first 4 double_words for equality */
> +       psubb   %xmm0, %xmm1            /* packed sub of comparison results*/
> +       pmovmskb %xmm1, %edx
> +       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> +       jnz     L(less4_double_words_48)
> +
> +       add     $64, %rsi
> +       add     $64, %rdi
> +       jmp     L(continue_48_00)
> +
> +       .p2align 4
> +L(continue_32_00):
> +       movdqu  (%rdi), %xmm1
> +       pcmpeqd %xmm1, %xmm0            /* Any null double_word? */
> +       pcmpeqd (%rsi), %xmm1           /* compare first 4 double_words for equality */
> +       psubb   %xmm0, %xmm1            /* packed sub of comparison results*/
> +       pmovmskb %xmm1, %edx
> +       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> +       jnz     L(less4_double_words)
> +
> +       add     $16, %rsi
> +       add     $16, %rdi
> +       jmp     L(continue_48_00)
> +
> +       .p2align 4
> +L(continue_16_00):
> +       movdqu  (%rdi), %xmm1
> +       pcmpeqd %xmm1, %xmm0            /* Any null double_word? */
> +       pcmpeqd (%rsi), %xmm1           /* compare first 4 double_words for equality */
> +       psubb   %xmm0, %xmm1            /* packed sub of comparison results*/
> +       pmovmskb %xmm1, %edx
> +       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> +       jnz     L(less4_double_words)
> +
> +       movdqu  16(%rdi), %xmm1
> +       pcmpeqd %xmm1, %xmm0            /* Any null double_word? */
> +       pcmpeqd 16(%rsi), %xmm1         /* compare first 4 double_words for equality */
> +       psubb   %xmm0, %xmm1            /* packed sub of comparison results*/
> +       pmovmskb %xmm1, %edx
> +       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> +       jnz     L(less4_double_words_16)
> +
> +       add     $32, %rsi
> +       add     $32, %rdi
> +       jmp     L(continue_48_00)
> +
> +       .p2align 4
> +L(continue_0_00):
> +       movdqu  (%rdi), %xmm1
> +       pcmpeqd %xmm1, %xmm0            /* Any null double_word? */
> +       pcmpeqd (%rsi), %xmm1           /* compare first 4 double_words for equality */
> +       psubb   %xmm0, %xmm1            /* packed sub of comparison results*/
> +       pmovmskb %xmm1, %edx
> +       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> +       jnz     L(less4_double_words)
> +
> +       movdqu  16(%rdi), %xmm1
> +       pcmpeqd %xmm1, %xmm0            /* Any null double_word? */
> +       pcmpeqd 16(%rsi), %xmm1         /* compare first 4 double_words for equality */
> +       psubb   %xmm0, %xmm1            /* packed sub of comparison results*/
> +       pmovmskb %xmm1, %edx
> +       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> +       jnz     L(less4_double_words_16)
> +
> +       movdqu  32(%rdi), %xmm1
> +       pcmpeqd %xmm1, %xmm0            /* Any null double_word? */
> +       pcmpeqd 32(%rsi), %xmm1         /* compare first 4 double_words for equality */
> +       psubb   %xmm0, %xmm1            /* packed sub of comparison results*/
> +       pmovmskb %xmm1, %edx
> +       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> +       jnz     L(less4_double_words_32)
> +
> +       add     $48, %rsi
> +       add     $48, %rdi
> +       jmp     L(continue_48_00)
> +
> +       .p2align 4
> +L(continue_32_32):
> +       movdqu  (%rdi), %xmm1
> +       movdqu  (%rsi), %xmm2
> +       pcmpeqd %xmm1, %xmm0            /* Any null double_word? */
> +       pcmpeqd %xmm2, %xmm1            /* compare first 4 double_words for equality */
> +       psubb   %xmm0, %xmm1            /* packed sub of comparison results*/
> +       pmovmskb %xmm1, %edx
> +       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> +       jnz     L(less4_double_words)
> +
> +       add     $16, %rsi
> +       add     $16, %rdi
> +       jmp     L(continue_48_48)
> +
> +       .p2align 4
> +L(continue_16_16):
> +       movdqu  (%rdi), %xmm1
> +       movdqu  (%rsi), %xmm2
> +       pcmpeqd %xmm1, %xmm0            /* Any null double_word? */
> +       pcmpeqd %xmm2, %xmm1            /* compare first 4 double_words for equality */
> +       psubb   %xmm0, %xmm1            /* packed sub of comparison results*/
> +       pmovmskb %xmm1, %edx
> +       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> +       jnz     L(less4_double_words)
> +
> +       movdqu  16(%rdi), %xmm3
> +       movdqu  16(%rsi), %xmm4
> +       pcmpeqd %xmm3, %xmm0            /* Any null double_word? */
> +       pcmpeqd %xmm4, %xmm3            /* compare first 4 double_words for equality */
> +       psubb   %xmm0, %xmm3            /* packed sub of comparison results*/
> +       pmovmskb %xmm3, %edx
> +       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> +       jnz     L(less4_double_words_16)
> +
> +       add     $32, %rsi
> +       add     $32, %rdi
> +       jmp     L(continue_48_48)
> +
> +       .p2align 4
> +L(continue_0_0):
> +       movdqu  (%rdi), %xmm1
> +       movdqu  (%rsi), %xmm2
> +       pcmpeqd %xmm1, %xmm0            /* Any null double_word? */
> +       pcmpeqd %xmm2, %xmm1            /* compare first 4 double_words for equality */
> +       psubb   %xmm0, %xmm1            /* packed sub of comparison results*/
> +       pmovmskb %xmm1, %edx
> +       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> +       jnz     L(less4_double_words)
> +
> +       movdqu  16(%rdi), %xmm3
> +       movdqu  16(%rsi), %xmm4
> +       pcmpeqd %xmm3, %xmm0            /* Any null double_word? */
> +       pcmpeqd %xmm4, %xmm3            /* compare first 4 double_words for equality */
> +       psubb   %xmm0, %xmm3            /* packed sub of comparison results*/
> +       pmovmskb %xmm3, %edx
> +       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> +       jnz     L(less4_double_words_16)
> +
> +       movdqu  32(%rdi), %xmm1
> +       movdqu  32(%rsi), %xmm2
> +       pcmpeqd %xmm1, %xmm0            /* Any null double_word? */
> +       pcmpeqd %xmm2, %xmm1            /* compare first 4 double_words for equality */
> +       psubb   %xmm0, %xmm1            /* packed sub of comparison results*/
> +       pmovmskb %xmm1, %edx
> +       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> +       jnz     L(less4_double_words_32)
> +
> +       add     $48, %rsi
> +       add     $48, %rdi
> +       jmp     L(continue_48_48)
> +
> +       .p2align 4
> +L(continue_0_16):
> +       movdqu  (%rdi), %xmm1
> +       movdqu  (%rsi), %xmm2
> +       pcmpeqd %xmm1, %xmm0            /* Any null double_word? */
> +       pcmpeqd %xmm2, %xmm1            /* compare first 4 double_words for equality */
> +       psubb   %xmm0, %xmm1            /* packed sub of comparison results*/
> +       pmovmskb %xmm1, %edx
> +       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> +       jnz     L(less4_double_words)
> +
> +       movdqu  16(%rdi), %xmm1
> +       movdqu  16(%rsi), %xmm2
> +       pcmpeqd %xmm1, %xmm0            /* Any null double_word? */
> +       pcmpeqd %xmm2, %xmm1            /* compare first 4 double_words for equality */
> +       psubb   %xmm0, %xmm1            /* packed sub of comparison results*/
> +       pmovmskb %xmm1, %edx
> +       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> +       jnz     L(less4_double_words_16)
> +
> +       add     $32, %rsi
> +       add     $32, %rdi
> +       jmp     L(continue_32_48)
> +
> +       .p2align 4
> +L(continue_0_32):
> +       movdqu  (%rdi), %xmm1
> +       movdqu  (%rsi), %xmm2
> +       pcmpeqd %xmm1, %xmm0            /* Any null double_word? */
> +       pcmpeqd %xmm2, %xmm1            /* compare first 4 double_words for equality */
> +       psubb   %xmm0, %xmm1            /* packed sub of comparison results*/
> +       pmovmskb %xmm1, %edx
> +       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> +       jnz     L(less4_double_words)
> +
> +       add     $16, %rsi
> +       add     $16, %rdi
> +       jmp     L(continue_16_48)
> +
> +       .p2align 4
> +L(continue_16_32):
> +       movdqu  (%rdi), %xmm1
> +       movdqu  (%rsi), %xmm2
> +       pcmpeqd %xmm1, %xmm0            /* Any null double_word? */
> +       pcmpeqd %xmm2, %xmm1            /* compare first 4 double_words for equality */
> +       psubb   %xmm0, %xmm1            /* packed sub of comparison results*/
> +       pmovmskb %xmm1, %edx
> +       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> +       jnz     L(less4_double_words)
> +
> +       add     $16, %rsi
> +       add     $16, %rdi
> +       jmp     L(continue_32_48)
> +
> +       .p2align 4
> +L(less4_double_words1):
> +       cmp     (%rsi), %eax
> +       jne     L(nequal)
> +       test    %eax, %eax
> +       jz      L(equal)
> +
> +       mov     4(%rsi), %ecx
> +       cmp     %ecx, 4(%rdi)
> +       jne     L(nequal)
> +       test    %ecx, %ecx
> +       jz      L(equal)
> +
> +       mov     8(%rsi), %ecx
> +       cmp     %ecx, 8(%rdi)
> +       jne     L(nequal)
> +       test    %ecx, %ecx
> +       jz      L(equal)
> +
> +       mov     12(%rsi), %ecx
> +       cmp     %ecx, 12(%rdi)
> +       jne     L(nequal)
> +       xor     %eax, %eax
> +       ret
> +
> +       .p2align 4
> +L(less4_double_words):
> +       xor     %eax, %eax
> +       test    %dl, %dl
> +       jz      L(next_two_double_words)
> +       and     $15, %dl
> +       jz      L(second_double_word)
> +       mov     (%rdi), %eax
> +       cmp     (%rsi), %eax
> +       jne     L(nequal)
> +       ret
> +
> +       .p2align 4
> +L(second_double_word):
> +       mov     4(%rdi), %eax
> +       cmp     4(%rsi), %eax
> +       jne     L(nequal)
> +       ret
> +
> +       .p2align 4
> +L(next_two_double_words):
> +       and     $15, %dh
> +       jz      L(fourth_double_word)
> +       mov     8(%rdi), %eax
> +       cmp     8(%rsi), %eax
> +       jne     L(nequal)
> +       ret
> +
> +       .p2align 4
> +L(fourth_double_word):
> +       mov     12(%rdi), %eax
> +       cmp     12(%rsi), %eax
> +       jne     L(nequal)
> +       ret
> +
> +       .p2align 4
> +L(less4_double_words_16):
> +       xor     %eax, %eax
> +       test    %dl, %dl
> +       jz      L(next_two_double_words_16)
> +       and     $15, %dl
> +       jz      L(second_double_word_16)
> +       mov     16(%rdi), %eax
> +       cmp     16(%rsi), %eax
> +       jne     L(nequal)
> +       ret
> +
> +       .p2align 4
> +L(second_double_word_16):
> +       mov     20(%rdi), %eax
> +       cmp     20(%rsi), %eax
> +       jne     L(nequal)
> +       ret
> +
> +       .p2align 4
> +L(next_two_double_words_16):
> +       and     $15, %dh
> +       jz      L(fourth_double_word_16)
> +       mov     24(%rdi), %eax
> +       cmp     24(%rsi), %eax
> +       jne     L(nequal)
> +       ret
> +
> +       .p2align 4
> +L(fourth_double_word_16):
> +       mov     28(%rdi), %eax
> +       cmp     28(%rsi), %eax
> +       jne     L(nequal)
> +       ret
> +
> +       .p2align 4
> +L(less4_double_words_32):
> +       xor     %eax, %eax
> +       test    %dl, %dl
> +       jz      L(next_two_double_words_32)
> +       and     $15, %dl
> +       jz      L(second_double_word_32)
> +       mov     32(%rdi), %eax
> +       cmp     32(%rsi), %eax
> +       jne     L(nequal)
> +       ret
> +
> +       .p2align 4
> +L(second_double_word_32):
> +       mov     36(%rdi), %eax
> +       cmp     36(%rsi), %eax
> +       jne     L(nequal)
> +       ret
> +
> +       .p2align 4
> +L(next_two_double_words_32):
> +       and     $15, %dh
> +       jz      L(fourth_double_word_32)
> +       mov     40(%rdi), %eax
> +       cmp     40(%rsi), %eax
> +       jne     L(nequal)
> +       ret
> +
> +       .p2align 4
> +L(fourth_double_word_32):
> +       mov     44(%rdi), %eax
> +       cmp     44(%rsi), %eax
> +       jne     L(nequal)
> +       ret
> +
> +       .p2align 4
> +L(less4_double_words_48):
> +       xor     %eax, %eax
> +       test    %dl, %dl
> +       jz      L(next_two_double_words_48)
> +       and     $15, %dl
> +       jz      L(second_double_word_48)
> +       mov     48(%rdi), %eax
> +       cmp     48(%rsi), %eax
> +       jne     L(nequal)
> +       ret
> +
> +       .p2align 4
> +L(second_double_word_48):
> +       mov     52(%rdi), %eax
> +       cmp     52(%rsi), %eax
> +       jne     L(nequal)
> +       ret
> +
> +       .p2align 4
> +L(next_two_double_words_48):
> +       and     $15, %dh
> +       jz      L(fourth_double_word_48)
> +       mov     56(%rdi), %eax
> +       cmp     56(%rsi), %eax
> +       jne     L(nequal)
> +       ret
> +
> +       .p2align 4
> +L(fourth_double_word_48):
> +       mov     60(%rdi), %eax
> +       cmp     60(%rsi), %eax
> +       jne     L(nequal)
> +       ret
> +
> +       .p2align 4
> +L(nequal):
> +       mov     $1, %eax
> +       jg      L(nequal_bigger)
> +       neg     %eax
> +
> +L(nequal_bigger):
> +       ret
> +
> +       .p2align 4
> +L(equal):
> +       xor     %rax, %rax
> +       ret
> +
> +END (STRCMP)
> diff --git a/sysdeps/x86_64/wcscmp.S b/sysdeps/x86_64/wcscmp.S
> index 5cb42f47b9..e04cdbf5fe 100644
> --- a/sysdeps/x86_64/wcscmp.S
> +++ b/sysdeps/x86_64/wcscmp.S
> @@ -16,936 +16,8 @@
>     License along with the GNU C Library; if not, see
>     <https://www.gnu.org/licenses/>.  */
>
> -#include <sysdep.h>
> +/* Symbol = __wcscmp.  */
>
> -/* Note: wcscmp uses signed comparison, not unsighed as in strcmp function. */
> -
> -       .text
> -ENTRY (__wcscmp)
> -/*
> -       * This implementation uses SSE to compare up to 16 bytes at a time.
> -*/
> -       mov     %esi, %eax
> -       mov     %edi, %edx
> -       pxor    %xmm0, %xmm0            /* clear %xmm0 for null char checks */
> -       mov     %al, %ch
> -       mov     %dl, %cl
> -       and     $63, %eax               /* rsi alignment in cache line */
> -       and     $63, %edx               /* rdi alignment in cache line */
> -       and     $15, %cl
> -       jz      L(continue_00)
> -       cmp     $16, %edx
> -       jb      L(continue_0)
> -       cmp     $32, %edx
> -       jb      L(continue_16)
> -       cmp     $48, %edx
> -       jb      L(continue_32)
> -
> -L(continue_48):
> -       and     $15, %ch
> -       jz      L(continue_48_00)
> -       cmp     $16, %eax
> -       jb      L(continue_0_48)
> -       cmp     $32, %eax
> -       jb      L(continue_16_48)
> -       cmp     $48, %eax
> -       jb      L(continue_32_48)
> -
> -       .p2align 4
> -L(continue_48_48):
> -       mov     (%rsi), %ecx
> -       cmp     %ecx, (%rdi)
> -       jne     L(nequal)
> -       test    %ecx, %ecx
> -       jz      L(equal)
> -
> -       mov     4(%rsi), %ecx
> -       cmp     %ecx, 4(%rdi)
> -       jne     L(nequal)
> -       test    %ecx, %ecx
> -       jz      L(equal)
> -
> -       mov     8(%rsi), %ecx
> -       cmp     %ecx, 8(%rdi)
> -       jne     L(nequal)
> -       test    %ecx, %ecx
> -       jz      L(equal)
> -
> -       mov     12(%rsi), %ecx
> -       cmp     %ecx, 12(%rdi)
> -       jne     L(nequal)
> -       test    %ecx, %ecx
> -       jz      L(equal)
> -
> -       movdqu  16(%rdi), %xmm1
> -       movdqu  16(%rsi), %xmm2
> -       pcmpeqd %xmm1, %xmm0            /* Any null double_word? */
> -       pcmpeqd %xmm2, %xmm1            /* compare first 4 double_words for equality */
> -       psubb   %xmm0, %xmm1            /* packed sub of comparison results*/
> -       pmovmskb %xmm1, %edx
> -       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> -       jnz     L(less4_double_words_16)
> -
> -       movdqu  32(%rdi), %xmm1
> -       movdqu  32(%rsi), %xmm2
> -       pcmpeqd %xmm1, %xmm0            /* Any null double_word? */
> -       pcmpeqd %xmm2, %xmm1            /* compare first 4 double_words for equality */
> -       psubb   %xmm0, %xmm1            /* packed sub of comparison results*/
> -       pmovmskb %xmm1, %edx
> -       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> -       jnz     L(less4_double_words_32)
> -
> -       movdqu  48(%rdi), %xmm1
> -       movdqu  48(%rsi), %xmm2
> -       pcmpeqd %xmm1, %xmm0            /* Any null double_word? */
> -       pcmpeqd %xmm2, %xmm1            /* compare first 4 double_words for equality */
> -       psubb   %xmm0, %xmm1            /* packed sub of comparison results*/
> -       pmovmskb %xmm1, %edx
> -       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> -       jnz     L(less4_double_words_48)
> -
> -       add     $64, %rsi
> -       add     $64, %rdi
> -       jmp     L(continue_48_48)
> -
> -L(continue_0):
> -       and     $15, %ch
> -       jz      L(continue_0_00)
> -       cmp     $16, %eax
> -       jb      L(continue_0_0)
> -       cmp     $32, %eax
> -       jb      L(continue_0_16)
> -       cmp     $48, %eax
> -       jb      L(continue_0_32)
> -
> -       .p2align 4
> -L(continue_0_48):
> -       mov     (%rsi), %ecx
> -       cmp     %ecx, (%rdi)
> -       jne     L(nequal)
> -       test    %ecx, %ecx
> -       jz      L(equal)
> -
> -       mov     4(%rsi), %ecx
> -       cmp     %ecx, 4(%rdi)
> -       jne     L(nequal)
> -       test    %ecx, %ecx
> -       jz      L(equal)
> -
> -       mov     8(%rsi), %ecx
> -       cmp     %ecx, 8(%rdi)
> -       jne     L(nequal)
> -       test    %ecx, %ecx
> -       jz      L(equal)
> -
> -       mov     12(%rsi), %ecx
> -       cmp     %ecx, 12(%rdi)
> -       jne     L(nequal)
> -       test    %ecx, %ecx
> -       jz      L(equal)
> -
> -       movdqu  16(%rdi), %xmm1
> -       movdqu  16(%rsi), %xmm2
> -       pcmpeqd %xmm1, %xmm0            /* Any null double_word? */
> -       pcmpeqd %xmm2, %xmm1            /* compare first 4 double_words for equality */
> -       psubb   %xmm0, %xmm1            /* packed sub of comparison results*/
> -       pmovmskb %xmm1, %edx
> -       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> -       jnz     L(less4_double_words_16)
> -
> -       movdqu  32(%rdi), %xmm1
> -       movdqu  32(%rsi), %xmm2
> -       pcmpeqd %xmm1, %xmm0            /* Any null double_word? */
> -       pcmpeqd %xmm2, %xmm1            /* compare first 4 double_words for equality */
> -       psubb   %xmm0, %xmm1            /* packed sub of comparison results*/
> -       pmovmskb %xmm1, %edx
> -       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> -       jnz     L(less4_double_words_32)
> -
> -       mov     48(%rsi), %ecx
> -       cmp     %ecx, 48(%rdi)
> -       jne     L(nequal)
> -       test    %ecx, %ecx
> -       jz      L(equal)
> -
> -       mov     52(%rsi), %ecx
> -       cmp     %ecx, 52(%rdi)
> -       jne     L(nequal)
> -       test    %ecx, %ecx
> -       jz      L(equal)
> -
> -       mov     56(%rsi), %ecx
> -       cmp     %ecx, 56(%rdi)
> -       jne     L(nequal)
> -       test    %ecx, %ecx
> -       jz      L(equal)
> -
> -       mov     60(%rsi), %ecx
> -       cmp     %ecx, 60(%rdi)
> -       jne     L(nequal)
> -       test    %ecx, %ecx
> -       jz      L(equal)
> -
> -       add     $64, %rsi
> -       add     $64, %rdi
> -       jmp     L(continue_0_48)
> -
> -       .p2align 4
> -L(continue_00):
> -       and     $15, %ch
> -       jz      L(continue_00_00)
> -       cmp     $16, %eax
> -       jb      L(continue_00_0)
> -       cmp     $32, %eax
> -       jb      L(continue_00_16)
> -       cmp     $48, %eax
> -       jb      L(continue_00_32)
> -
> -       .p2align 4
> -L(continue_00_48):
> -       pcmpeqd (%rdi), %xmm0
> -       mov     (%rdi), %eax
> -       pmovmskb %xmm0, %ecx
> -       test    %ecx, %ecx
> -       jnz     L(less4_double_words1)
> -
> -       cmp     (%rsi), %eax
> -       jne     L(nequal)
> -
> -       mov     4(%rdi), %eax
> -       cmp     4(%rsi), %eax
> -       jne     L(nequal)
> -
> -       mov     8(%rdi), %eax
> -       cmp     8(%rsi), %eax
> -       jne     L(nequal)
> -
> -       mov     12(%rdi), %eax
> -       cmp     12(%rsi), %eax
> -       jne     L(nequal)
> -
> -       movdqu  16(%rsi), %xmm2
> -       pcmpeqd %xmm2, %xmm0            /* Any null double_word? */
> -       pcmpeqd 16(%rdi), %xmm2         /* compare first 4 double_words for equality */
> -       psubb   %xmm0, %xmm2            /* packed sub of comparison results*/
> -       pmovmskb %xmm2, %edx
> -       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> -       jnz     L(less4_double_words_16)
> -
> -       movdqu  32(%rsi), %xmm2
> -       pcmpeqd %xmm2, %xmm0            /* Any null double_word? */
> -       pcmpeqd 32(%rdi), %xmm2         /* compare first 4 double_words for equality */
> -       psubb   %xmm0, %xmm2            /* packed sub of comparison results*/
> -       pmovmskb %xmm2, %edx
> -       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> -       jnz     L(less4_double_words_32)
> -
> -       movdqu  48(%rsi), %xmm2
> -       pcmpeqd %xmm2, %xmm0            /* Any null double_word? */
> -       pcmpeqd 48(%rdi), %xmm2         /* compare first 4 double_words for equality */
> -       psubb   %xmm0, %xmm2            /* packed sub of comparison results*/
> -       pmovmskb %xmm2, %edx
> -       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> -       jnz     L(less4_double_words_48)
> -
> -       add     $64, %rsi
> -       add     $64, %rdi
> -       jmp     L(continue_00_48)
> -
> -       .p2align 4
> -L(continue_32):
> -       and     $15, %ch
> -       jz      L(continue_32_00)
> -       cmp     $16, %eax
> -       jb      L(continue_0_32)
> -       cmp     $32, %eax
> -       jb      L(continue_16_32)
> -       cmp     $48, %eax
> -       jb      L(continue_32_32)
> -
> -       .p2align 4
> -L(continue_32_48):
> -       mov     (%rsi), %ecx
> -       cmp     %ecx, (%rdi)
> -       jne     L(nequal)
> -       test    %ecx, %ecx
> -       jz      L(equal)
> -
> -       mov     4(%rsi), %ecx
> -       cmp     %ecx, 4(%rdi)
> -       jne     L(nequal)
> -       test    %ecx, %ecx
> -       jz      L(equal)
> -
> -       mov     8(%rsi), %ecx
> -       cmp     %ecx, 8(%rdi)
> -       jne     L(nequal)
> -       test    %ecx, %ecx
> -       jz      L(equal)
> -
> -       mov     12(%rsi), %ecx
> -       cmp     %ecx, 12(%rdi)
> -       jne     L(nequal)
> -       test    %ecx, %ecx
> -       jz      L(equal)
> -
> -       mov     16(%rsi), %ecx
> -       cmp     %ecx, 16(%rdi)
> -       jne     L(nequal)
> -       test    %ecx, %ecx
> -       jz      L(equal)
> -
> -       mov     20(%rsi), %ecx
> -       cmp     %ecx, 20(%rdi)
> -       jne     L(nequal)
> -       test    %ecx, %ecx
> -       jz      L(equal)
> -
> -       mov     24(%rsi), %ecx
> -       cmp     %ecx, 24(%rdi)
> -       jne     L(nequal)
> -       test    %ecx, %ecx
> -       jz      L(equal)
> -
> -       mov     28(%rsi), %ecx
> -       cmp     %ecx, 28(%rdi)
> -       jne     L(nequal)
> -       test    %ecx, %ecx
> -       jz      L(equal)
> -
> -       movdqu  32(%rdi), %xmm1
> -       movdqu  32(%rsi), %xmm2
> -       pcmpeqd %xmm1, %xmm0            /* Any null double_word? */
> -       pcmpeqd %xmm2, %xmm1            /* compare first 4 double_words for equality */
> -       psubb   %xmm0, %xmm1            /* packed sub of comparison results*/
> -       pmovmskb %xmm1, %edx
> -       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> -       jnz     L(less4_double_words_32)
> -
> -       movdqu  48(%rdi), %xmm1
> -       movdqu  48(%rsi), %xmm2
> -       pcmpeqd %xmm1, %xmm0            /* Any null double_word? */
> -       pcmpeqd %xmm2, %xmm1            /* compare first 4 double_words for equality */
> -       psubb   %xmm0, %xmm1            /* packed sub of comparison results*/
> -       pmovmskb %xmm1, %edx
> -       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> -       jnz     L(less4_double_words_48)
> -
> -       add     $64, %rsi
> -       add     $64, %rdi
> -       jmp     L(continue_32_48)
> -
> -       .p2align 4
> -L(continue_16):
> -       and     $15, %ch
> -       jz      L(continue_16_00)
> -       cmp     $16, %eax
> -       jb      L(continue_0_16)
> -       cmp     $32, %eax
> -       jb      L(continue_16_16)
> -       cmp     $48, %eax
> -       jb      L(continue_16_32)
> -
> -       .p2align 4
> -L(continue_16_48):
> -       mov     (%rsi), %ecx
> -       cmp     %ecx, (%rdi)
> -       jne     L(nequal)
> -       test    %ecx, %ecx
> -       jz      L(equal)
> -
> -       mov     4(%rsi), %ecx
> -       cmp     %ecx, 4(%rdi)
> -       jne     L(nequal)
> -       test    %ecx, %ecx
> -       jz      L(equal)
> -
> -       mov     8(%rsi), %ecx
> -       cmp     %ecx, 8(%rdi)
> -       jne     L(nequal)
> -       test    %ecx, %ecx
> -       jz      L(equal)
> -
> -       mov     12(%rsi), %ecx
> -       cmp     %ecx, 12(%rdi)
> -       jne     L(nequal)
> -       test    %ecx, %ecx
> -       jz      L(equal)
> -
> -       movdqu  16(%rdi), %xmm1
> -       movdqu  16(%rsi), %xmm2
> -       pcmpeqd %xmm1, %xmm0            /* Any null double_word? */
> -       pcmpeqd %xmm2, %xmm1            /* compare first 4 double_words for equality */
> -       psubb   %xmm0, %xmm1            /* packed sub of comparison results*/
> -       pmovmskb %xmm1, %edx
> -       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> -       jnz     L(less4_double_words_16)
> -
> -       mov     32(%rsi), %ecx
> -       cmp     %ecx, 32(%rdi)
> -       jne     L(nequal)
> -       test    %ecx, %ecx
> -       jz      L(equal)
> -
> -       mov     36(%rsi), %ecx
> -       cmp     %ecx, 36(%rdi)
> -       jne     L(nequal)
> -       test    %ecx, %ecx
> -       jz      L(equal)
> -
> -       mov     40(%rsi), %ecx
> -       cmp     %ecx, 40(%rdi)
> -       jne     L(nequal)
> -       test    %ecx, %ecx
> -       jz      L(equal)
> -
> -       mov     44(%rsi), %ecx
> -       cmp     %ecx, 44(%rdi)
> -       jne     L(nequal)
> -       test    %ecx, %ecx
> -       jz      L(equal)
> -
> -       movdqu  48(%rdi), %xmm1
> -       movdqu  48(%rsi), %xmm2
> -       pcmpeqd %xmm1, %xmm0            /* Any null double_word? */
> -       pcmpeqd %xmm2, %xmm1            /* compare first 4 double_words for equality */
> -       psubb   %xmm0, %xmm1            /* packed sub of comparison results*/
> -       pmovmskb %xmm1, %edx
> -       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> -       jnz     L(less4_double_words_48)
> -
> -       add     $64, %rsi
> -       add     $64, %rdi
> -       jmp     L(continue_16_48)
> -
> -       .p2align 4
> -L(continue_00_00):
> -       movdqa  (%rdi), %xmm1
> -       pcmpeqd %xmm1, %xmm0            /* Any null double_word? */
> -       pcmpeqd (%rsi), %xmm1           /* compare first 4 double_words for equality */
> -       psubb   %xmm0, %xmm1            /* packed sub of comparison results*/
> -       pmovmskb %xmm1, %edx
> -       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> -       jnz     L(less4_double_words)
> -
> -       movdqa  16(%rdi), %xmm3
> -       pcmpeqd %xmm3, %xmm0            /* Any null double_word? */
> -       pcmpeqd 16(%rsi), %xmm3         /* compare first 4 double_words for equality */
> -       psubb   %xmm0, %xmm3            /* packed sub of comparison results*/
> -       pmovmskb %xmm3, %edx
> -       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> -       jnz     L(less4_double_words_16)
> -
> -       movdqa  32(%rdi), %xmm5
> -       pcmpeqd %xmm5, %xmm0            /* Any null double_word? */
> -       pcmpeqd 32(%rsi), %xmm5         /* compare first 4 double_words for equality */
> -       psubb   %xmm0, %xmm5            /* packed sub of comparison results*/
> -       pmovmskb %xmm5, %edx
> -       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> -       jnz     L(less4_double_words_32)
> -
> -       movdqa  48(%rdi), %xmm1
> -       pcmpeqd %xmm1, %xmm0            /* Any null double_word? */
> -       pcmpeqd 48(%rsi), %xmm1         /* compare first 4 double_words for equality */
> -       psubb   %xmm0, %xmm1            /* packed sub of comparison results*/
> -       pmovmskb %xmm1, %edx
> -       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> -       jnz     L(less4_double_words_48)
> -
> -       add     $64, %rsi
> -       add     $64, %rdi
> -       jmp     L(continue_00_00)
> -
> -       .p2align 4
> -L(continue_00_32):
> -       movdqu  (%rsi), %xmm2
> -       pcmpeqd %xmm2, %xmm0            /* Any null double_word? */
> -       pcmpeqd (%rdi), %xmm2           /* compare first 4 double_words for equality */
> -       psubb   %xmm0, %xmm2            /* packed sub of comparison results*/
> -       pmovmskb %xmm2, %edx
> -       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> -       jnz     L(less4_double_words)
> -
> -       add     $16, %rsi
> -       add     $16, %rdi
> -       jmp     L(continue_00_48)
> -
> -       .p2align 4
> -L(continue_00_16):
> -       movdqu  (%rsi), %xmm2
> -       pcmpeqd %xmm2, %xmm0            /* Any null double_word? */
> -       pcmpeqd (%rdi), %xmm2           /* compare first 4 double_words for equality */
> -       psubb   %xmm0, %xmm2            /* packed sub of comparison results*/
> -       pmovmskb %xmm2, %edx
> -       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> -       jnz     L(less4_double_words)
> -
> -       movdqu  16(%rsi), %xmm2
> -       pcmpeqd %xmm2, %xmm0            /* Any null double_word? */
> -       pcmpeqd 16(%rdi), %xmm2         /* compare first 4 double_words for equality */
> -       psubb   %xmm0, %xmm2            /* packed sub of comparison results*/
> -       pmovmskb %xmm2, %edx
> -       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> -       jnz     L(less4_double_words_16)
> -
> -       add     $32, %rsi
> -       add     $32, %rdi
> -       jmp     L(continue_00_48)
> -
> -       .p2align 4
> -L(continue_00_0):
> -       movdqu  (%rsi), %xmm2
> -       pcmpeqd %xmm2, %xmm0            /* Any null double_word? */
> -       pcmpeqd (%rdi), %xmm2           /* compare first 4 double_words for equality */
> -       psubb   %xmm0, %xmm2            /* packed sub of comparison results*/
> -       pmovmskb %xmm2, %edx
> -       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> -       jnz     L(less4_double_words)
> -
> -       movdqu  16(%rsi), %xmm2
> -       pcmpeqd %xmm2, %xmm0            /* Any null double_word? */
> -       pcmpeqd 16(%rdi), %xmm2         /* compare first 4 double_words for equality */
> -       psubb   %xmm0, %xmm2            /* packed sub of comparison results*/
> -       pmovmskb %xmm2, %edx
> -       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> -       jnz     L(less4_double_words_16)
> -
> -       movdqu  32(%rsi), %xmm2
> -       pcmpeqd %xmm2, %xmm0            /* Any null double_word? */
> -       pcmpeqd 32(%rdi), %xmm2         /* compare first 4 double_words for equality */
> -       psubb   %xmm0, %xmm2            /* packed sub of comparison results*/
> -       pmovmskb %xmm2, %edx
> -       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> -       jnz     L(less4_double_words_32)
> -
> -       add     $48, %rsi
> -       add     $48, %rdi
> -       jmp     L(continue_00_48)
> -
> -       .p2align 4
> -L(continue_48_00):
> -       pcmpeqd (%rsi), %xmm0
> -       mov     (%rdi), %eax
> -       pmovmskb %xmm0, %ecx
> -       test    %ecx, %ecx
> -       jnz     L(less4_double_words1)
> -
> -       cmp     (%rsi), %eax
> -       jne     L(nequal)
> -
> -       mov     4(%rdi), %eax
> -       cmp     4(%rsi), %eax
> -       jne     L(nequal)
> -
> -       mov     8(%rdi), %eax
> -       cmp     8(%rsi), %eax
> -       jne     L(nequal)
> -
> -       mov     12(%rdi), %eax
> -       cmp     12(%rsi), %eax
> -       jne     L(nequal)
> -
> -       movdqu  16(%rdi), %xmm1
> -       pcmpeqd %xmm1, %xmm0            /* Any null double_word? */
> -       pcmpeqd 16(%rsi), %xmm1         /* compare first 4 double_words for equality */
> -       psubb   %xmm0, %xmm1            /* packed sub of comparison results*/
> -       pmovmskb %xmm1, %edx
> -       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> -       jnz     L(less4_double_words_16)
> -
> -       movdqu  32(%rdi), %xmm1
> -       pcmpeqd %xmm1, %xmm0            /* Any null double_word? */
> -       pcmpeqd 32(%rsi), %xmm1         /* compare first 4 double_words for equality */
> -       psubb   %xmm0, %xmm1            /* packed sub of comparison results*/
> -       pmovmskb %xmm1, %edx
> -       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> -       jnz     L(less4_double_words_32)
> -
> -       movdqu  48(%rdi), %xmm1
> -       pcmpeqd %xmm1, %xmm0            /* Any null double_word? */
> -       pcmpeqd 48(%rsi), %xmm1         /* compare first 4 double_words for equality */
> -       psubb   %xmm0, %xmm1            /* packed sub of comparison results*/
> -       pmovmskb %xmm1, %edx
> -       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> -       jnz     L(less4_double_words_48)
> -
> -       add     $64, %rsi
> -       add     $64, %rdi
> -       jmp     L(continue_48_00)
> -
> -       .p2align 4
> -L(continue_32_00):
> -       movdqu  (%rdi), %xmm1
> -       pcmpeqd %xmm1, %xmm0            /* Any null double_word? */
> -       pcmpeqd (%rsi), %xmm1           /* compare first 4 double_words for equality */
> -       psubb   %xmm0, %xmm1            /* packed sub of comparison results*/
> -       pmovmskb %xmm1, %edx
> -       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> -       jnz     L(less4_double_words)
> -
> -       add     $16, %rsi
> -       add     $16, %rdi
> -       jmp     L(continue_48_00)
> -
> -       .p2align 4
> -L(continue_16_00):
> -       movdqu  (%rdi), %xmm1
> -       pcmpeqd %xmm1, %xmm0            /* Any null double_word? */
> -       pcmpeqd (%rsi), %xmm1           /* compare first 4 double_words for equality */
> -       psubb   %xmm0, %xmm1            /* packed sub of comparison results*/
> -       pmovmskb %xmm1, %edx
> -       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> -       jnz     L(less4_double_words)
> -
> -       movdqu  16(%rdi), %xmm1
> -       pcmpeqd %xmm1, %xmm0            /* Any null double_word? */
> -       pcmpeqd 16(%rsi), %xmm1         /* compare first 4 double_words for equality */
> -       psubb   %xmm0, %xmm1            /* packed sub of comparison results*/
> -       pmovmskb %xmm1, %edx
> -       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> -       jnz     L(less4_double_words_16)
> -
> -       add     $32, %rsi
> -       add     $32, %rdi
> -       jmp     L(continue_48_00)
> -
> -       .p2align 4
> -L(continue_0_00):
> -       movdqu  (%rdi), %xmm1
> -       pcmpeqd %xmm1, %xmm0            /* Any null double_word? */
> -       pcmpeqd (%rsi), %xmm1           /* compare first 4 double_words for equality */
> -       psubb   %xmm0, %xmm1            /* packed sub of comparison results*/
> -       pmovmskb %xmm1, %edx
> -       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> -       jnz     L(less4_double_words)
> -
> -       movdqu  16(%rdi), %xmm1
> -       pcmpeqd %xmm1, %xmm0            /* Any null double_word? */
> -       pcmpeqd 16(%rsi), %xmm1         /* compare first 4 double_words for equality */
> -       psubb   %xmm0, %xmm1            /* packed sub of comparison results*/
> -       pmovmskb %xmm1, %edx
> -       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> -       jnz     L(less4_double_words_16)
> -
> -       movdqu  32(%rdi), %xmm1
> -       pcmpeqd %xmm1, %xmm0            /* Any null double_word? */
> -       pcmpeqd 32(%rsi), %xmm1         /* compare first 4 double_words for equality */
> -       psubb   %xmm0, %xmm1            /* packed sub of comparison results*/
> -       pmovmskb %xmm1, %edx
> -       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> -       jnz     L(less4_double_words_32)
> -
> -       add     $48, %rsi
> -       add     $48, %rdi
> -       jmp     L(continue_48_00)
> -
> -       .p2align 4
> -L(continue_32_32):
> -       movdqu  (%rdi), %xmm1
> -       movdqu  (%rsi), %xmm2
> -       pcmpeqd %xmm1, %xmm0            /* Any null double_word? */
> -       pcmpeqd %xmm2, %xmm1            /* compare first 4 double_words for equality */
> -       psubb   %xmm0, %xmm1            /* packed sub of comparison results*/
> -       pmovmskb %xmm1, %edx
> -       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> -       jnz     L(less4_double_words)
> -
> -       add     $16, %rsi
> -       add     $16, %rdi
> -       jmp     L(continue_48_48)
> -
> -       .p2align 4
> -L(continue_16_16):
> -       movdqu  (%rdi), %xmm1
> -       movdqu  (%rsi), %xmm2
> -       pcmpeqd %xmm1, %xmm0            /* Any null double_word? */
> -       pcmpeqd %xmm2, %xmm1            /* compare first 4 double_words for equality */
> -       psubb   %xmm0, %xmm1            /* packed sub of comparison results*/
> -       pmovmskb %xmm1, %edx
> -       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> -       jnz     L(less4_double_words)
> -
> -       movdqu  16(%rdi), %xmm3
> -       movdqu  16(%rsi), %xmm4
> -       pcmpeqd %xmm3, %xmm0            /* Any null double_word? */
> -       pcmpeqd %xmm4, %xmm3            /* compare first 4 double_words for equality */
> -       psubb   %xmm0, %xmm3            /* packed sub of comparison results*/
> -       pmovmskb %xmm3, %edx
> -       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> -       jnz     L(less4_double_words_16)
> -
> -       add     $32, %rsi
> -       add     $32, %rdi
> -       jmp     L(continue_48_48)
> -
> -       .p2align 4
> -L(continue_0_0):
> -       movdqu  (%rdi), %xmm1
> -       movdqu  (%rsi), %xmm2
> -       pcmpeqd %xmm1, %xmm0            /* Any null double_word? */
> -       pcmpeqd %xmm2, %xmm1            /* compare first 4 double_words for equality */
> -       psubb   %xmm0, %xmm1            /* packed sub of comparison results*/
> -       pmovmskb %xmm1, %edx
> -       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> -       jnz     L(less4_double_words)
> -
> -       movdqu  16(%rdi), %xmm3
> -       movdqu  16(%rsi), %xmm4
> -       pcmpeqd %xmm3, %xmm0            /* Any null double_word? */
> -       pcmpeqd %xmm4, %xmm3            /* compare first 4 double_words for equality */
> -       psubb   %xmm0, %xmm3            /* packed sub of comparison results*/
> -       pmovmskb %xmm3, %edx
> -       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> -       jnz     L(less4_double_words_16)
> -
> -       movdqu  32(%rdi), %xmm1
> -       movdqu  32(%rsi), %xmm2
> -       pcmpeqd %xmm1, %xmm0            /* Any null double_word? */
> -       pcmpeqd %xmm2, %xmm1            /* compare first 4 double_words for equality */
> -       psubb   %xmm0, %xmm1            /* packed sub of comparison results*/
> -       pmovmskb %xmm1, %edx
> -       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> -       jnz     L(less4_double_words_32)
> -
> -       add     $48, %rsi
> -       add     $48, %rdi
> -       jmp     L(continue_48_48)
> -
> -       .p2align 4
> -L(continue_0_16):
> -       movdqu  (%rdi), %xmm1
> -       movdqu  (%rsi), %xmm2
> -       pcmpeqd %xmm1, %xmm0            /* Any null double_word? */
> -       pcmpeqd %xmm2, %xmm1            /* compare first 4 double_words for equality */
> -       psubb   %xmm0, %xmm1            /* packed sub of comparison results*/
> -       pmovmskb %xmm1, %edx
> -       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> -       jnz     L(less4_double_words)
> -
> -       movdqu  16(%rdi), %xmm1
> -       movdqu  16(%rsi), %xmm2
> -       pcmpeqd %xmm1, %xmm0            /* Any null double_word? */
> -       pcmpeqd %xmm2, %xmm1            /* compare first 4 double_words for equality */
> -       psubb   %xmm0, %xmm1            /* packed sub of comparison results*/
> -       pmovmskb %xmm1, %edx
> -       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> -       jnz     L(less4_double_words_16)
> -
> -       add     $32, %rsi
> -       add     $32, %rdi
> -       jmp     L(continue_32_48)
> -
> -       .p2align 4
> -L(continue_0_32):
> -       movdqu  (%rdi), %xmm1
> -       movdqu  (%rsi), %xmm2
> -       pcmpeqd %xmm1, %xmm0            /* Any null double_word? */
> -       pcmpeqd %xmm2, %xmm1            /* compare first 4 double_words for equality */
> -       psubb   %xmm0, %xmm1            /* packed sub of comparison results*/
> -       pmovmskb %xmm1, %edx
> -       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> -       jnz     L(less4_double_words)
> -
> -       add     $16, %rsi
> -       add     $16, %rdi
> -       jmp     L(continue_16_48)
> -
> -       .p2align 4
> -L(continue_16_32):
> -       movdqu  (%rdi), %xmm1
> -       movdqu  (%rsi), %xmm2
> -       pcmpeqd %xmm1, %xmm0            /* Any null double_word? */
> -       pcmpeqd %xmm2, %xmm1            /* compare first 4 double_words for equality */
> -       psubb   %xmm0, %xmm1            /* packed sub of comparison results*/
> -       pmovmskb %xmm1, %edx
> -       sub     $0xffff, %edx           /* if first 4 double_words are same, edx == 0xffff */
> -       jnz     L(less4_double_words)
> -
> -       add     $16, %rsi
> -       add     $16, %rdi
> -       jmp     L(continue_32_48)
> -
> -       .p2align 4
> -L(less4_double_words1):
> -       cmp     (%rsi), %eax
> -       jne     L(nequal)
> -       test    %eax, %eax
> -       jz      L(equal)
> -
> -       mov     4(%rsi), %ecx
> -       cmp     %ecx, 4(%rdi)
> -       jne     L(nequal)
> -       test    %ecx, %ecx
> -       jz      L(equal)
> -
> -       mov     8(%rsi), %ecx
> -       cmp     %ecx, 8(%rdi)
> -       jne     L(nequal)
> -       test    %ecx, %ecx
> -       jz      L(equal)
> -
> -       mov     12(%rsi), %ecx
> -       cmp     %ecx, 12(%rdi)
> -       jne     L(nequal)
> -       xor     %eax, %eax
> -       ret
> -
> -       .p2align 4
> -L(less4_double_words):
> -       xor     %eax, %eax
> -       test    %dl, %dl
> -       jz      L(next_two_double_words)
> -       and     $15, %dl
> -       jz      L(second_double_word)
> -       mov     (%rdi), %eax
> -       cmp     (%rsi), %eax
> -       jne     L(nequal)
> -       ret
> -
> -       .p2align 4
> -L(second_double_word):
> -       mov     4(%rdi), %eax
> -       cmp     4(%rsi), %eax
> -       jne     L(nequal)
> -       ret
> -
> -       .p2align 4
> -L(next_two_double_words):
> -       and     $15, %dh
> -       jz      L(fourth_double_word)
> -       mov     8(%rdi), %eax
> -       cmp     8(%rsi), %eax
> -       jne     L(nequal)
> -       ret
> -
> -       .p2align 4
> -L(fourth_double_word):
> -       mov     12(%rdi), %eax
> -       cmp     12(%rsi), %eax
> -       jne     L(nequal)
> -       ret
> -
> -       .p2align 4
> -L(less4_double_words_16):
> -       xor     %eax, %eax
> -       test    %dl, %dl
> -       jz      L(next_two_double_words_16)
> -       and     $15, %dl
> -       jz      L(second_double_word_16)
> -       mov     16(%rdi), %eax
> -       cmp     16(%rsi), %eax
> -       jne     L(nequal)
> -       ret
> -
> -       .p2align 4
> -L(second_double_word_16):
> -       mov     20(%rdi), %eax
> -       cmp     20(%rsi), %eax
> -       jne     L(nequal)
> -       ret
> -
> -       .p2align 4
> -L(next_two_double_words_16):
> -       and     $15, %dh
> -       jz      L(fourth_double_word_16)
> -       mov     24(%rdi), %eax
> -       cmp     24(%rsi), %eax
> -       jne     L(nequal)
> -       ret
> -
> -       .p2align 4
> -L(fourth_double_word_16):
> -       mov     28(%rdi), %eax
> -       cmp     28(%rsi), %eax
> -       jne     L(nequal)
> -       ret
> -
> -       .p2align 4
> -L(less4_double_words_32):
> -       xor     %eax, %eax
> -       test    %dl, %dl
> -       jz      L(next_two_double_words_32)
> -       and     $15, %dl
> -       jz      L(second_double_word_32)
> -       mov     32(%rdi), %eax
> -       cmp     32(%rsi), %eax
> -       jne     L(nequal)
> -       ret
> -
> -       .p2align 4
> -L(second_double_word_32):
> -       mov     36(%rdi), %eax
> -       cmp     36(%rsi), %eax
> -       jne     L(nequal)
> -       ret
> -
> -       .p2align 4
> -L(next_two_double_words_32):
> -       and     $15, %dh
> -       jz      L(fourth_double_word_32)
> -       mov     40(%rdi), %eax
> -       cmp     40(%rsi), %eax
> -       jne     L(nequal)
> -       ret
> -
> -       .p2align 4
> -L(fourth_double_word_32):
> -       mov     44(%rdi), %eax
> -       cmp     44(%rsi), %eax
> -       jne     L(nequal)
> -       ret
> -
> -       .p2align 4
> -L(less4_double_words_48):
> -       xor     %eax, %eax
> -       test    %dl, %dl
> -       jz      L(next_two_double_words_48)
> -       and     $15, %dl
> -       jz      L(second_double_word_48)
> -       mov     48(%rdi), %eax
> -       cmp     48(%rsi), %eax
> -       jne     L(nequal)
> -       ret
> -
> -       .p2align 4
> -L(second_double_word_48):
> -       mov     52(%rdi), %eax
> -       cmp     52(%rsi), %eax
> -       jne     L(nequal)
> -       ret
> -
> -       .p2align 4
> -L(next_two_double_words_48):
> -       and     $15, %dh
> -       jz      L(fourth_double_word_48)
> -       mov     56(%rdi), %eax
> -       cmp     56(%rsi), %eax
> -       jne     L(nequal)
> -       ret
> -
> -       .p2align 4
> -L(fourth_double_word_48):
> -       mov     60(%rdi), %eax
> -       cmp     60(%rsi), %eax
> -       jne     L(nequal)
> -       ret
> -
> -       .p2align 4
> -L(nequal):
> -       mov     $1, %eax
> -       jg      L(nequal_bigger)
> -       neg     %eax
> -
> -L(nequal_bigger):
> -       ret
> -
> -       .p2align 4
> -L(equal):
> -       xor     %rax, %rax
> -       ret
> -
> -END (__wcscmp)
> -#ifndef __wcscmp
> +#include "multiarch/wcscmp-sse2.S"
>  libc_hidden_def (__wcscmp)
>  weak_alias (__wcscmp, wcscmp)
> -#endif
> --
> 2.34.1
>

LGTM.

Thanks.

-- 
H.J.