82 lines
2.6 KiB
ArmAsm
82 lines
2.6 KiB
ArmAsm
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/* Copyright (C) 2008-2021 Free Software Foundation, Inc.
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Contributor: Joern Rennecke <joern.rennecke@embecosm.com>
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on behalf of Synopsys Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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#include "arc-ieee-754.h"
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/* inputs: DBL0, DBL1
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output: z flag
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clobber: r12, flags
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For NaNs, bit 19.. bit 30 of the high word must be set. */
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#if 0 /* DEBUG */
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.global __eqdf2
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.balign 4
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FUNC(__eqdf2)
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__eqdf2:
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st.a r11,[sp,-4]` push_s blink` st.a r10,[sp,-4]` st.a r9,[sp,-4]
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st.a r8,[sp,-4]` st.a r7,[sp,-4]` st.a r6,[sp,-4]` st.a r5,[sp,-4]
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st.a r4,[sp,-4]` push_s r3` push_s r2` push_s r1`
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bl.d __eqdf2_c` push_s r0
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mov r11,r0` pop_s r0` pop_s r1` pop_s r2` pop_s r3
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ld.ab r4,[sp,4]` ld.ab r5,[sp,4]` ld.ab r6,[sp,4]`
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ld.ab r7,[sp,4]` ld.ab r8,[sp,4]` ld.ab r9,[sp,4]
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bl.d __eqdf2_asm` ld.ab r10,[sp,4]
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pop_s blink
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breq.d r11,0,0f
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ld.ab r11,[sp,4]
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jne_s [blink]
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bl abort
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0: jeq_s [blink]
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bl abort
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ENDFUNC(__eqdf2)
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#define __eqdf2 __eqdf2_asm
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#endif /* DEBUG */
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.global __eqdf2
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.balign 4
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HIDDEN_FUNC(__eqdf2)
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/* Good performance as long as the difference in high word is
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well predictable (as seen from the branch predictor). */
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__eqdf2:
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brne.d DBL0H,DBL1H,.Lhighdiff
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#ifndef __HS__
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/* The next two instructions are required to recognize the FPX
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NaN, which has a pattern like this: 0x7ff0_0000_8000_0000, as
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oposite to 0x7ff8_0000_0000_0000. */
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or.f 0,DBL0L,DBL1L
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mov_s r12,0x00200000
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bset.ne r12,r12,0
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#else
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bmsk r12,DBL0H,20
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#endif /* __HS__ */
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add1.f r12,r12,DBL0H /* set c iff NaN; also, clear z if NaN. */
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j_s.d [blink]
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cmp.cc DBL0L,DBL1L
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.balign 4
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.Lhighdiff:
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or r12,DBL0H,DBL1H
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or.f 0,DBL0L,DBL1L
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j_s.d [blink]
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bmsk.eq.f r12,r12,30
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ENDFUNC(__eqdf2)
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/* ??? could we do better by speeding up some 'common' case of inequality? */
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