mirror of
https://github.com/jart/cosmopolitan.git
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120 lines
3.8 KiB
ArmAsm
120 lines
3.8 KiB
ArmAsm
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/*-*- 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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│ │
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│ Musl Libc │
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│ Copyright © 2005-2014 Rich Felker, et al. │
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│ │
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│ Permission is hereby granted, free of charge, to any person obtaining │
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│ a copy of this software and associated documentation files (the │
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│ "Software"), to deal in the Software without restriction, including │
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│ without limitation the rights to use, copy, modify, merge, publish, │
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│ distribute, sublicense, and/or sell copies of the Software, and to │
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│ permit persons to whom the Software is furnished to do so, subject to │
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│ the following conditions: │
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│ │
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│ The above copyright notice and this permission notice shall be │
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│ included in all copies or substantial portions of the Software. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, │
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│ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF │
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│ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. │
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│ IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY │
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│ CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, │
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│ TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE │
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│ SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. │
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│ │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/macros.internal.h"
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feclearexcept:
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# maintain exceptions in the sse mxcsr, clear x87 exceptions
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mov %edi,%ecx
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and $0x3f,%ecx
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fnstsw %ax
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test %eax,%ecx
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jz 1f
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fnclex
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1: stmxcsr -8(%rsp)
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and $0x3f,%eax
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or %eax,-8(%rsp)
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test %ecx,-8(%rsp)
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jz 1f
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not %ecx
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and %ecx,-8(%rsp)
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ldmxcsr -8(%rsp)
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1: xor %eax,%eax
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ret
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.endfn feclearexcept,globl
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feraiseexcept:
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and $0x3f,%edi
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stmxcsr -8(%rsp)
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or %edi,-8(%rsp)
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ldmxcsr -8(%rsp)
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xor %eax,%eax
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ret
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.endfn feraiseexcept,globl
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__fesetround:
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push %rax
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xor %eax,%eax
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mov %edi,%ecx
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fnstcw (%rsp)
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andb $0xf3,1(%rsp)
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or %ch,1(%rsp)
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fldcw (%rsp)
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stmxcsr (%rsp)
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shl $3,%ch
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andb $0x9f,1(%rsp)
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or %ch,1(%rsp)
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ldmxcsr (%rsp)
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pop %rcx
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ret
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.endfn __fesetround,globl,hidden
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fegetround:
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push %rax
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stmxcsr (%rsp)
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pop %rax
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shr $3,%eax
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and $0xc00,%eax
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ret
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.endfn fegetround,globl
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fegetenv:
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xor %eax,%eax
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fnstenv (%rdi)
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stmxcsr 28(%rdi)
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ret
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.endfn fegetenv,globl
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fesetenv:
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xor %eax,%eax
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inc %rdi
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jz 1f
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fldenv -1(%rdi)
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ldmxcsr 27(%rdi)
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ret
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1: push %rax
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push %rax
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pushq $0xffff
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pushq $0x37f
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fldenv (%rsp)
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pushq $0x1f80
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ldmxcsr (%rsp)
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add $40,%rsp
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ret
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.endfn fesetenv,globl
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fetestexcept:
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and $0x3f,%edi
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push %rax
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stmxcsr (%rsp)
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pop %rsi
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fnstsw %ax
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or %esi,%eax
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and %edi,%eax
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ret
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.endfn fetestexcept,globl
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