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Diffstat (limited to 'libgcc/config/arc/ieee-754/eqdf2.S')
| -rw-r--r-- | libgcc/config/arc/ieee-754/eqdf2.S | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/libgcc/config/arc/ieee-754/eqdf2.S b/libgcc/config/arc/ieee-754/eqdf2.S new file mode 100644 index 0000000000..bb5e48645c --- /dev/null +++ b/libgcc/config/arc/ieee-754/eqdf2.S @@ -0,0 +1,81 @@ +/* Copyright (C) 2008-2017 Free Software Foundation, Inc. + Contributor: Joern Rennecke <joern.rennecke@embecosm.com> + on behalf of Synopsys Inc. + +This file is part of GCC. + +GCC 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; either version 3, or (at your option) any later +version. + +GCC 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. + +Under Section 7 of GPL version 3, you are granted additional +permissions described in the GCC Runtime Library Exception, version +3.1, as published by the Free Software Foundation. + +You should have received a copy of the GNU General Public License and +a copy of the GCC Runtime Library Exception along with this program; +see the files COPYING3 and COPYING.RUNTIME respectively. If not, see +<http://www.gnu.org/licenses/>. */ + +#include "arc-ieee-754.h" +/* inputs: DBL0, DBL1 + output: z flag + clobber: r12, flags + For NaNs, bit 19.. bit 30 of the high word must be set. */ +#if 0 /* DEBUG */ + .global __eqdf2 + .balign 4 + FUNC(__eqdf2) +__eqdf2: + st.a r11,[sp,-4]` push_s blink` st.a r10,[sp,-4]` st.a r9,[sp,-4] + st.a r8,[sp,-4]` st.a r7,[sp,-4]` st.a r6,[sp,-4]` st.a r5,[sp,-4] + st.a r4,[sp,-4]` push_s r3` push_s r2` push_s r1` + bl.d __eqdf2_c` push_s r0 + mov r11,r0` pop_s r0` pop_s r1` pop_s r2` pop_s r3 + ld.ab r4,[sp,4]` ld.ab r5,[sp,4]` ld.ab r6,[sp,4]` + ld.ab r7,[sp,4]` ld.ab r8,[sp,4]` ld.ab r9,[sp,4] + bl.d __eqdf2_asm` ld.ab r10,[sp,4] + pop_s blink + breq.d r11,0,0f + ld.ab r11,[sp,4] + jne_s [blink] + bl abort +0: jeq_s [blink] + bl abort + ENDFUNC(__eqdf2) +#define __eqdf2 __eqdf2_asm +#endif /* DEBUG */ + .global __eqdf2 + .balign 4 + HIDDEN_FUNC(__eqdf2) + /* Good performance as long as the difference in high word is + well predictable (as seen from the branch predictor). */ +__eqdf2: + brne.d DBL0H,DBL1H,.Lhighdiff +#ifndef __HS__ + /* The next two instructions are required to recognize the FPX + NaN, which has a pattern like this: 0x7ff0_0000_8000_0000, as + oposite to 0x7ff8_0000_0000_0000. */ + or.f 0,DBL0L,DBL1L + mov_s r12,0x00200000 + bset.ne r12,r12,0 +#else + bmsk r12,DBL0H,20 +#endif /* __HS__ */ + add1.f r12,r12,DBL0H /* set c iff NaN; also, clear z if NaN. */ + j_s.d [blink] + cmp.cc DBL0L,DBL1L + .balign 4 +.Lhighdiff: + or r12,DBL0H,DBL1H + or.f 0,DBL0L,DBL1L + j_s.d [blink] + bmsk.eq.f r12,r12,30 + ENDFUNC(__eqdf2) +/* ??? could we do better by speeding up some 'common' case of inequality? */ |