47 lines
2.3 KiB
ArmAsm
47 lines
2.3 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_fpclassifyf:
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.leafprologue
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movd %xmm0,%edx
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movd %xmm0,%eax
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shr $23,%eax
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and $255,%eax
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je 7f
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cmp $255,%eax
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je 8f
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mov $FP_NORMAL,%eax
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jmp 1f
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7: add %edx,%edx
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je 5f
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mov $FP_SUBNORMAL,%eax
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jmp 1f
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5: mov $FP_ZERO,%eax
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jmp 1f
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8: sal $9,%edx
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sete %al
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movzbl %al,%eax
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1: .leafepilogue
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.endfn tinymath_fpclassifyf,globl
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.alias tinymath_fpclassifyf,__fpclassifyf
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