45 lines
2.4 KiB
ArmAsm
45 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/macros.h"
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.source __FILE__
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/ Rounds to nearest integer, away from zero.
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/
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/ @param 𝑥 is double scalar in low half of %xmm0
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/ @return 64-bit signed integer in %rax
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/ @see round(), lrint()
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tinymath_lround:
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.leafprologue
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.profilable
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movsd A(%rip),%xmm2
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movsd B(%rip),%xmm1
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andpd %xmm0,%xmm2
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orpd %xmm2,%xmm1
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addsd %xmm0,%xmm1
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cvttsd2siq %xmm1,%rax
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.leafepilogue
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.endfn tinymath_lround,globl
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.alias tinymath_lround,lround
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.alias tinymath_lround,llround
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.rodata.cst16
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A: .quad 0x8000000000000000,0
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B: .quad 0x3fdfffffffffffff,0
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