cosmopolitan/libc/tinymath/fmod.S

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/*-*- mode:unix-assembly; indent-tabs-mode:t; tab-width:8; coding:utf-8 -*-│
vi: set et ft=asm ts=8 tw=8 fenc=utf-8 :vi
Copyright 2020 Justine Alexandra Roberts Tunney
This program is free software; you can redistribute it and/or modify │
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License. │
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of │
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software │
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA
*/
#include "libc/macros.h"
.source __FILE__
/ fmod [sic] does (𝑥 rem 𝑦) w/ round()-style rounding.
/
/ @param 𝑥 is double passed in lower half of %xmm0
/ @param 𝑦 is double passed in lower half of %xmm1
/ @return remainder ∈ (-|𝑦|,|𝑦|) in %xmm0
/ @define 𝑥-trunc(𝑥/𝑦)*𝑦
/ @see emod()
tinymath_fmod:
ezlea tinymath_fmodl,ax
jmp _d2ld2
.endfn tinymath_fmod,globl
.alias tinymath_fmod,fmod