projects / thirdparty / gcc.git / blame
| Commit | Line | Data |
|---|---|---|
| 818ab71a | 1 | /* Copyright (C) 2008-2016 Free Software Foundation, Inc. |
| d38a64b4 JR |
2 | Contributor: Joern Rennecke <joern.rennecke@embecosm.com> |
| 3 | on behalf of Synopsys Inc. | |
| 4 | ||
| 5 | This file is part of GCC. | |
| 6 | ||
| 7 | GCC is free software; you can redistribute it and/or modify it under | |
| 8 | the terms of the GNU General Public License as published by the Free | |
| 9 | Software Foundation; either version 3, or (at your option) any later | |
| 10 | version. | |
| 11 | ||
| 12 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
| 13 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 14 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 15 | for more details. | |
| 16 | ||
| 17 | Under Section 7 of GPL version 3, you are granted additional | |
| 18 | permissions described in the GCC Runtime Library Exception, version | |
| 19 | 3.1, as published by the Free Software Foundation. | |
| 20 | ||
| 21 | You should have received a copy of the GNU General Public License and | |
| 22 | a copy of the GCC Runtime Library Exception along with this program; | |
| 23 | see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
| 24 | <http://www.gnu.org/licenses/>. */ | |
| 25 | ||
| 26 | #include "arc-ieee-754.h" | |
| 27 | /* inputs: DBL0, DBL1 | |
| 28 | output: z flag | |
| 29 | clobber: r12, flags | |
| 30 | For NaNs, bit 19.. bit 30 of the high word must be set. */ | |
| 31 | #if 0 /* DEBUG */ | |
| 32 | .global __eqdf2 | |
| 33 | .balign 4 | |
| 34 | FUNC(__eqdf2) | |
| 35 | __eqdf2: | |
| 36 | st.a r11,[sp,-4]` push_s blink` st.a r10,[sp,-4]` st.a r9,[sp,-4] | |
| 37 | st.a r8,[sp,-4]` st.a r7,[sp,-4]` st.a r6,[sp,-4]` st.a r5,[sp,-4] | |
| 38 | st.a r4,[sp,-4]` push_s r3` push_s r2` push_s r1` | |
| 39 | bl.d __eqdf2_c` push_s r0 | |
| 40 | mov r11,r0` pop_s r0` pop_s r1` pop_s r2` pop_s r3 | |
| 41 | ld.ab r4,[sp,4]` ld.ab r5,[sp,4]` ld.ab r6,[sp,4]` | |
| 42 | ld.ab r7,[sp,4]` ld.ab r8,[sp,4]` ld.ab r9,[sp,4] | |
| 43 | bl.d __eqdf2_asm` ld.ab r10,[sp,4] | |
| 44 | pop_s blink | |
| 45 | breq.d r11,0,0f | |
| 46 | ld.ab r11,[sp,4] | |
| 47 | jne_s [blink] | |
| 48 | bl abort | |
| 49 | 0: jeq_s [blink] | |
| 50 | bl abort | |
| 51 | ENDFUNC(__eqdf2) | |
| 52 | #define __eqdf2 __eqdf2_asm | |
| 53 | #endif /* DEBUG */ | |
| 54 | .global __eqdf2 | |
| 55 | .balign 4 | |
| 56 | HIDDEN_FUNC(__eqdf2) | |
| 57 | /* Good performance as long as the difference in high word is | |
| 58 | well predictable (as seen from the branch predictor). */ | |
| 59 | __eqdf2: | |
| 60 | brne.d DBL0H,DBL1H,.Lhighdiff | |
| 39d50464 CZ |
61 | #ifndef __HS__ |
| 62 | /* The next two instructions are required to recognize the FPX | |
| 63 | NaN, which has a pattern like this: 0x7ff0_0000_8000_0000, as | |
| 64 | oposite to 0x7ff8_0000_0000_0000. */ | |
| 65 | or.f 0,DBL0L,DBL1L | |
| 66 | mov_s r12,0x00200000 | |
| 67 | bset.ne r12,r12,0 | |
| 68 | #else | |
| 69 | bmsk r12,DBL0H,20 | |
| 70 | #endif /* __HS__ */ | |
| d38a64b4 JR |
71 | add1.f r12,r12,DBL0H /* set c iff NaN; also, clear z if NaN. */ |
| 72 | j_s.d [blink] | |
| 73 | cmp.cc DBL0L,DBL1L | |
| 74 | .balign 4 | |
| 75 | .Lhighdiff: | |
| 76 | or r12,DBL0H,DBL1H | |
| 77 | or.f 0,DBL0L,DBL1L | |
| 78 | j_s.d [blink] | |
| 79 | bmsk.eq.f r12,r12,30 | |
| 80 | ENDFUNC(__eqdf2) | |
| 81 | /* ??? could we do better by speeding up some 'common' case of inequality? */ |