50 lines
2.4 KiB
ArmAsm
50 lines
2.4 KiB
ArmAsm
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/*-*- mode:asm; 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 "ape/lib/pc.h"
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#include "libc/macros.h"
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.yoink __FILE__
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/ Computes transcedental trigonometry op w/ reactive scaling.
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/
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/ @param %rdx points to op function
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/ @param everything else delegates
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/ @clob %ax
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/ @see sin,cos,tan
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c2rangr:push %rbp
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mov %rsp,%rbp
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.profilable
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call *%rdx
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fstsw %ax
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test $FPU_C2>>8,%ah
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jnz 1f
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0: pop %rbp
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ret
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1: fldpi
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fadd %st
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fxch %st(1)
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2: fprem1
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fnstsw %ax
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test $FPU_C2>>8,%ah
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jnz 2b
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fstp %st(1)
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call *%rdx
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jmp 0b
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.endfn c2rangr,globl,hidden
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