55 lines
2.4 KiB
ArmAsm
55 lines
2.4 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 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ This program is free software; you can redistribute it and/or modify │
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│ it under the terms of the GNU General Public License as published by │
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│ the Free Software Foundation; version 2 of the License. │
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│ │
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│ This program is distributed in the hope that it will be useful, but │
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│ 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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│ General Public License for more details. │
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│ │
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│ You should have received a copy of the GNU General Public License │
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│ along with this program; if not, write to the Free Software │
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/math.h"
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#include "libc/macros.h"
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.source __FILE__
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tinymath_fpclassifyl:
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push %rbp
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mov %rsp,%rbp
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mov 24(%rbp),%rax
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mov 16(%rbp),%rdx
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and $0x7fff,%ax
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mov %rdx,%rcx
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shr $63,%rcx
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movzwl %ax,%esi
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or %ecx,%esi
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jne 2f
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cmp $1,%rdx
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sbb %eax,%eax
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add $3,%eax
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jmp 1f
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2: cmp $0x7fff,%ax
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jne 4f
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xor %eax,%eax
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test %rcx,%rcx
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je 1f
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xor %eax,%eax
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add %rdx,%rdx
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sete %al
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jmp 1f
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4: mov %ecx,%eax
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neg %eax
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and $FP_NORMAL,%eax
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1: pop %rbp
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ret
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.endfn tinymath_fpclassifyl,globl
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.alias tinymath_fpclassifyl,__fpclassifyl
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