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49889fb256
1. Add default ISA level selection in non-multiarch/rtld
implementations.
2. Add ISA level build guards to different implementations.
- I.e strcpy-avx2.S which is ISA level 3 will only build if
compiled ISA level <= 3. Otherwise there is no reason to
include it as we will always use one of the ISA level 4
implementations (strcpy-evex.S).
3. Refactor the ifunc selector and ifunc implementation list to use
the ISA level aware wrapper macros that allow functions below the
compiled ISA level (with a guranteed replacement) to be skipped.
Tested with and without multiarch on x86_64 for ISA levels:
{generic, x86-64-v2, x86-64-v3, x86-64-v4}
And m32 with and without multiarch.
284 lines
4.9 KiB
ArmAsm
284 lines
4.9 KiB
ArmAsm
/* strcat with SSE2
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Copyright (C) 2011-2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <isa-level.h>
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/* MINIMUM_X86_ISA_LEVEL <= 2 because there is no V2 implementation
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so we need this to build for ISA V2 builds. */
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#if ISA_SHOULD_BUILD (2)
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# include <sysdep.h>
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# ifndef STRCAT
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# define STRCAT __strcat_sse2_unaligned
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# endif
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# define USE_AS_STRCAT
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.text
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ENTRY (STRCAT)
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mov %rdi, %r9
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# ifdef USE_AS_STRNCAT
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mov %rdx, %r8
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# endif
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/* Inline corresponding strlen file, temporary until new strcpy
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implementation gets merged. */
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xor %rax, %rax
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mov %edi, %ecx
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and $0x3f, %ecx
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pxor %xmm0, %xmm0
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cmp $0x30, %ecx
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ja L(next)
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movdqu (%rdi), %xmm1
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pcmpeqb %xmm1, %xmm0
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pmovmskb %xmm0, %edx
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test %edx, %edx
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jnz L(exit_less16)
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mov %rdi, %rax
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and $-16, %rax
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jmp L(align16_start)
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L(next):
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mov %rdi, %rax
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and $-16, %rax
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pcmpeqb (%rax), %xmm0
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mov $-1, %r10d
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sub %rax, %rcx
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shl %cl, %r10d
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pmovmskb %xmm0, %edx
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and %r10d, %edx
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jnz L(exit)
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L(align16_start):
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pxor %xmm0, %xmm0
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pxor %xmm1, %xmm1
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pxor %xmm2, %xmm2
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pxor %xmm3, %xmm3
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pcmpeqb 16(%rax), %xmm0
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pmovmskb %xmm0, %edx
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test %edx, %edx
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jnz L(exit16)
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pcmpeqb 32(%rax), %xmm1
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pmovmskb %xmm1, %edx
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test %edx, %edx
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jnz L(exit32)
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pcmpeqb 48(%rax), %xmm2
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pmovmskb %xmm2, %edx
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test %edx, %edx
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jnz L(exit48)
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pcmpeqb 64(%rax), %xmm3
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pmovmskb %xmm3, %edx
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test %edx, %edx
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jnz L(exit64)
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pcmpeqb 80(%rax), %xmm0
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add $64, %rax
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pmovmskb %xmm0, %edx
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test %edx, %edx
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jnz L(exit16)
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pcmpeqb 32(%rax), %xmm1
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pmovmskb %xmm1, %edx
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test %edx, %edx
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jnz L(exit32)
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pcmpeqb 48(%rax), %xmm2
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pmovmskb %xmm2, %edx
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test %edx, %edx
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jnz L(exit48)
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pcmpeqb 64(%rax), %xmm3
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pmovmskb %xmm3, %edx
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test %edx, %edx
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jnz L(exit64)
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pcmpeqb 80(%rax), %xmm0
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add $64, %rax
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pmovmskb %xmm0, %edx
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test %edx, %edx
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jnz L(exit16)
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pcmpeqb 32(%rax), %xmm1
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pmovmskb %xmm1, %edx
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test %edx, %edx
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jnz L(exit32)
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pcmpeqb 48(%rax), %xmm2
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pmovmskb %xmm2, %edx
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test %edx, %edx
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jnz L(exit48)
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pcmpeqb 64(%rax), %xmm3
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pmovmskb %xmm3, %edx
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test %edx, %edx
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jnz L(exit64)
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pcmpeqb 80(%rax), %xmm0
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add $64, %rax
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pmovmskb %xmm0, %edx
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test %edx, %edx
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jnz L(exit16)
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pcmpeqb 32(%rax), %xmm1
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pmovmskb %xmm1, %edx
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test %edx, %edx
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jnz L(exit32)
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pcmpeqb 48(%rax), %xmm2
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pmovmskb %xmm2, %edx
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test %edx, %edx
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jnz L(exit48)
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pcmpeqb 64(%rax), %xmm3
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pmovmskb %xmm3, %edx
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test %edx, %edx
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jnz L(exit64)
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test $0x3f, %rax
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jz L(align64_loop)
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pcmpeqb 80(%rax), %xmm0
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add $80, %rax
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pmovmskb %xmm0, %edx
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test %edx, %edx
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jnz L(exit)
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test $0x3f, %rax
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jz L(align64_loop)
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pcmpeqb 16(%rax), %xmm1
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add $16, %rax
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pmovmskb %xmm1, %edx
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test %edx, %edx
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jnz L(exit)
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test $0x3f, %rax
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jz L(align64_loop)
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pcmpeqb 16(%rax), %xmm2
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add $16, %rax
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pmovmskb %xmm2, %edx
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test %edx, %edx
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jnz L(exit)
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test $0x3f, %rax
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jz L(align64_loop)
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pcmpeqb 16(%rax), %xmm3
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add $16, %rax
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pmovmskb %xmm3, %edx
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test %edx, %edx
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jnz L(exit)
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add $16, %rax
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.p2align 4
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L(align64_loop):
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movaps (%rax), %xmm4
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pminub 16(%rax), %xmm4
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movaps 32(%rax), %xmm5
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pminub 48(%rax), %xmm5
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add $64, %rax
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pminub %xmm4, %xmm5
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pcmpeqb %xmm0, %xmm5
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pmovmskb %xmm5, %edx
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test %edx, %edx
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jz L(align64_loop)
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pcmpeqb -64(%rax), %xmm0
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sub $80, %rax
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pmovmskb %xmm0, %edx
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test %edx, %edx
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jnz L(exit16)
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pcmpeqb 32(%rax), %xmm1
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pmovmskb %xmm1, %edx
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test %edx, %edx
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jnz L(exit32)
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pcmpeqb 48(%rax), %xmm2
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pmovmskb %xmm2, %edx
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test %edx, %edx
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jnz L(exit48)
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pcmpeqb 64(%rax), %xmm3
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pmovmskb %xmm3, %edx
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sub %rdi, %rax
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bsf %rdx, %rdx
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add %rdx, %rax
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add $64, %rax
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jmp L(StartStrcpyPart)
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.p2align 4
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L(exit):
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sub %rdi, %rax
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L(exit_less16):
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bsf %rdx, %rdx
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add %rdx, %rax
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jmp L(StartStrcpyPart)
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.p2align 4
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L(exit16):
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sub %rdi, %rax
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bsf %rdx, %rdx
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add %rdx, %rax
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add $16, %rax
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jmp L(StartStrcpyPart)
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.p2align 4
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L(exit32):
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sub %rdi, %rax
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bsf %rdx, %rdx
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add %rdx, %rax
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add $32, %rax
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jmp L(StartStrcpyPart)
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.p2align 4
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L(exit48):
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sub %rdi, %rax
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bsf %rdx, %rdx
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add %rdx, %rax
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add $48, %rax
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jmp L(StartStrcpyPart)
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.p2align 4
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L(exit64):
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sub %rdi, %rax
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bsf %rdx, %rdx
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add %rdx, %rax
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add $64, %rax
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.p2align 4
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L(StartStrcpyPart):
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lea (%r9, %rax), %rdi
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mov %rsi, %rcx
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mov %r9, %rax /* save result */
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# ifdef USE_AS_STRNCAT
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test %r8, %r8
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jz L(ExitZero)
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# define USE_AS_STRNCPY
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# endif
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# include "strcpy-sse2-unaligned.S"
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#endif
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