mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-02-07 15:03:34 +00:00
8f522cb702
This change progresses our AARCH64 support:
- The AARCH64 build and tests are now passing
- Add 128-bit floating-point support to printf()
- Fix clone() so it initializes cosmo's x28 TLS register
- Fix TLS memory layout issue with aarch64 _Alignas vars
- Revamp microbenchmarking tools so they work on aarch64
- Make some subtle improvements to aarch64 crash reporting
- Make kisdangerous() memory checks more accurate on aarch64
- Remove sys_open() since it's not available on Linux AARCH64
This change makes general improvements to Cosmo and Redbean:
- Introduce GetHostIsa() function in Redbean
- You can now feature check using pledge(0, 0)
- You can now feature check using unveil("",0)
- Refactor some more x86-specific asm comments
- Refactor and write docs for some libm functions
- Make the mmap() API behave more similar to Linux
- Fix WIFSIGNALED() which wrongly returned true for zero
- Rename some obscure cosmo keywords from noFOO to dontFOO
84 lines
2.9 KiB
ArmAsm
84 lines
2.9 KiB
ArmAsm
/*-*- mode:unix-assembly; indent-tabs-mode:t; tab-width:8; coding:utf-8 -*-│
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│vi: set et ft=asm ts=8 tw=8 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2023 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/nexgen32e/x86feature.h"
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#include "libc/macros.internal.h"
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// Zeroes as many registers as possible.
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//
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// Each caller should declare an appropriate prototype.
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//
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// @param is return value
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// @return is copied from parameter
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__wipe:
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#ifdef __x86_64__
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mov %rdi,%rax
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xor %edi,%edi
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xor %esi,%esi
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xor %edx,%edx
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xor %ecx,%ecx
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xor %r8d,%r8d
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xor %r9d,%r9d
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xor %r10d,%r10d
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xor %r11d,%r11d
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testb X86_HAVE(AVX)+kCpuids(%rip)
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jz .Lsse
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vpxor %xmm0,%xmm0,%xmm0
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vpxor %xmm1,%xmm1,%xmm1
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vpxor %xmm2,%xmm2,%xmm2
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vpxor %xmm3,%xmm3,%xmm3
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vpxor %xmm4,%xmm4,%xmm4
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vpxor %xmm5,%xmm5,%xmm5
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vpxor %xmm6,%xmm6,%xmm6
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vpxor %xmm7,%xmm7,%xmm7
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ret
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.Lsse: xorps %xmm0,%xmm0
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xorps %xmm1,%xmm1
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xorps %xmm2,%xmm2
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xorps %xmm3,%xmm3
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xorps %xmm4,%xmm4
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xorps %xmm5,%xmm5
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xorps %xmm6,%xmm6
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xorps %xmm7,%xmm7
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ret
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#elif defined(__aarch64__)
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mov x1,#0
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mov x2,#0
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mov x3,#0
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mov x4,#0
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mov x5,#0
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mov x6,#0
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mov x7,#0
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mov x9,#0
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mov x10,#0
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mov x11,#0
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mov x12,#0
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mov x13,#0
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mov x14,#0
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mov x15,#0
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movi v0.16b,#0
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movi v1.16b,#0
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movi v2.16b,#0
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movi v3.16b,#0
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movi v4.16b,#0
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movi v5.16b,#0
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movi v6.16b,#0
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movi v7.16b,#0
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ret
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#endif
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.endfn __wipe,globl,hidden
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