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1 | /* Copyright (C) 2008-2012 Free Software Foundation, Inc. |
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: c flags to be used for 'hs' condition | |
29 | clobber: r12, flags */ | |
30 | /* For NaNs, bit 19.. bit 30 of the high word must be set. */ | |
31 | #if 0 /* DEBUG */ | |
32 | .global __gedf2 | |
33 | .balign 4 | |
34 | FUNC(__gedf2) | |
35 | __gedf2: | |
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 __gedf2_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 __gedf2_asm` ld.ab r10,[sp,4] | |
44 | pop_s blink | |
45 | brge.d r11,0,0f | |
46 | ld.ab r11,[sp,4] | |
47 | jlo [blink] | |
48 | bl abort | |
49 | 0: jhs [blink] | |
50 | bl abort | |
51 | ENDFUNC(__gedf2) | |
52 | #define __gedf2 __gedf2_asm | |
53 | #endif /* DEBUG */ | |
54 | .global __gedf2 | |
55 | .balign 4 | |
56 | HIDDEN_FUNC(__gedf2) | |
57 | __gedf2: | |
58 | or.f r12,DBL0H,DBL1H | |
59 | bmi.d .Lneg | |
60 | bmsk_s r12,r12,20 | |
61 | add1.f 0,r12,DBL0H ; clear z; set c iff NaN | |
62 | add1.cc.f r12,r12,DBL1H ; clear z; set c iff NaN | |
63 | bbit1 DBL0H,31,.Lneg | |
64 | cmp.cc DBL0H,DBL1H | |
65 | j_s.d [blink] | |
66 | cmp.eq DBL0L,DBL1L | |
67 | .balign 4 | |
68 | .Lneg: breq.d DBL1H,0,.L0 | |
69 | add1.f 0,r12,DBL0H | |
70 | add1.cc.f r12,r12,DBL1H | |
71 | cmp.cc DBL1H,DBL0H | |
72 | j_s.d [blink] | |
73 | cmp.eq DBL1L,DBL0L | |
74 | .balign 4 | |
75 | .L0: | |
76 | bxor.f 0,DBL0H,31 ; check for high word of -0. | |
77 | beq_s .Lcheck_0 | |
78 | cmp.cc DBL1H,DBL0H | |
79 | j_s.d [blink] | |
80 | cmp.eq DBL1L,DBL0L | |
81 | .Lcheck_0: | |
82 | ; high words suggest DBL0 may be -0, DBL1 +0; check low words. | |
83 | cmp_s DBL1H,DBL0L | |
84 | j_s.d [blink] | |
85 | cmp.cc DBL1H,DBL1L | |
86 | ENDFUNC(__gedf2) |