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f1717362 | 1 | /* Copyright (C) 2008-2016 Free Software Foundation, Inc. |
8eaaaea3 | 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 | ||
28 | #if 0 /* DEBUG */ | |
29 | .global __mulsf3 | |
30 | FUNC(__mulsf3) | |
31 | .balign 4 | |
32 | __mulsf3: | |
33 | push_s blink | |
34 | push_s r1 | |
35 | bl.d __mulsf3_c | |
36 | push_s r0 | |
37 | ld_s r1,[sp,4] | |
38 | st_s r0,[sp,4] | |
39 | bl.d __mulsf3_asm | |
40 | pop_s r0 | |
41 | pop_s r1 | |
42 | pop_s blink | |
43 | cmp r0,r1 | |
44 | jeq_s [blink] | |
45 | and r12,r0,r1 | |
46 | bic.f 0,0x7f800000,r12 | |
47 | bne 0f | |
48 | bmsk.f 0,r0,22 | |
49 | bmsk.ne.f r1,r1,22 | |
50 | jne_s [blink] ; both NaN -> OK | |
51 | 0: bl abort | |
52 | ENDFUNC(__mulsf3) | |
53 | #define __mulsf3 __mulsf3_asm | |
54 | #endif /* DEBUG */ | |
55 | ||
56 | .balign 4 | |
57 | .global __mulsf3 | |
58 | FUNC(__mulsf3) | |
59 | __mulsf3: | |
60 | ld.as r9,[pcl,76]; [pcl,((.L7f800000-.+2)/4)] | |
61 | bmsk r4,r1,22 | |
62 | bset r3,r4,23 | |
63 | bmsk r2,r0,22 | |
64 | and r11,r0,r9 | |
65 | breq.d r11,0,.Ldenorm_dbl0 | |
66 | and r12,r1,r9 | |
67 | xor_s r0,r0,r1 | |
68 | breq.d r11,r9,.Linf_nan_dbl0 | |
69 | bset_s r2,r2,23 | |
70 | breq r12,0,.Ldenorm_dbl1 | |
71 | breq r12,r9,.Linf_nan_dbl1 | |
72 | .Lpast_denorm: | |
73 | mov r6,0 | |
74 | lsr.f r7,r2 | |
75 | ; We could so this a bit faster here with a 32 bit shift register and | |
76 | ; inserting the r2 factor / retrieving the low result a byte at a time, | |
77 | ; but that'd increase code size. | |
78 | mov lp_count,24 | |
79 | .balign 4 | |
80 | lp 0f | |
81 | add.cs r6,r6,r3 | |
82 | lsr.f r6,r6 | |
83 | rrc.f r7,r7 | |
84 | 0: | |
85 | ld.as r4,[pcl,59]; [pcl,((.L7fffffff-.+2)/4)] | |
86 | asl.f 0,r6,8 | |
87 | add.pl r6,r6,r6 | |
88 | bclr.pl r6,r6,23 | |
89 | add.pl.f r7,r7,r7 | |
90 | add.cs r6,r6,1 | |
91 | lsr.f 0,r6,1 | |
92 | add_s r12,r12,r11 | |
93 | adc.f 0,r7,r4 | |
94 | add_s r12,r12, \ | |
95 | -0x3f800000 | |
96 | adc.f r8,r6,r12 | |
97 | tst.pl r8,r9 | |
98 | bic r0,r0,r4 | |
99 | min r3,r8,r9 | |
100 | jpnz.d [blink] | |
101 | add.pnz r0,r0,r3 | |
102 | ; infinity or denormal number | |
103 | add.ne.f r3,r3,r3 | |
104 | asr_s r3,r3,23+1 | |
105 | bset r6,r6,23 | |
106 | bpnz.d .Linfinity | |
107 | sub_s r3,r3,1 | |
108 | neg_s r2,r3 | |
109 | brhi.d r2,24,.Lret_r0 ; right shift shift > 24 -> return +-0 | |
110 | lsr r2,r6,r2 | |
111 | asl r9,r6,r3 | |
112 | lsr.f 0,r2,1 | |
113 | tst r7,r7 | |
114 | add_s r0,r0,r2 | |
115 | bset.ne r9,r9,0 | |
116 | adc.f 0,r9,r4 | |
117 | j_s.d [blink] | |
118 | add.cs r0,r0,1 | |
119 | .Linfinity: | |
120 | j_s.d [blink] | |
121 | add_s r0,r0,r9 | |
122 | ||
123 | .Lret_r0: j_s [blink] | |
124 | ||
125 | .balign 4 | |
126 | .Ldenorm_dbl0: | |
127 | asl_s r2,r2,8 | |
128 | norm.f r4,r2 | |
129 | lsr_s r2,r2,7 | |
130 | asl r2,r2,r4 | |
131 | breq.d r12,r9,.Ldenorm_dbl0_inf_nan_dbl1 | |
132 | asl r4,r4,23 | |
133 | sub.ne.f r12,r12,r4 | |
134 | bhi.d .Lpast_denorm | |
135 | xor_s r0,r0,r1 | |
136 | bmsk r1,r0,30 | |
137 | j_s.d [blink] | |
138 | bic_s r0,r0,r1 | |
139 | ||
140 | .balign 4 | |
141 | .Ldenorm_dbl0_inf_nan_dbl1: | |
142 | bmsk.f 0,r0,30 | |
143 | beq_s .Lretnan | |
144 | xor_s r0,r0,r1 | |
145 | .Linf_nan_dbl1: | |
146 | xor_s r1,r1,r0 | |
147 | bclr_s r1,r1,31 | |
148 | j_s.d [blink] | |
149 | xor_s r0,r0,r1 | |
150 | .Linf_nan_dbl0: | |
151 | sub_s r2,r1,1 ; inf/nan * 0 -> nan; inf * nan -> nan (use |r2| >= inf) | |
152 | bic.f 0,r9,r2 | |
153 | xor_s r0,r0,r1 | |
154 | bclr_s r1,r1,31 | |
155 | xor_s r0,r0,r1 | |
156 | jne_s [blink] | |
157 | .Lretnan: | |
158 | j_s.d [blink] | |
159 | mov r0,-1 | |
160 | .balign 4 | |
161 | .Ldenorm_dbl1: | |
162 | norm.f r3,r4 | |
163 | sub_s r3,r3,7 | |
164 | asl r4,r4,r3 | |
165 | sub_s r3,r3,1 | |
166 | asl_s r3,r3,23 | |
167 | sub.ne.f r11,r11,r3 | |
168 | bhi.d .Lpast_denorm | |
169 | mov_s r3,r4 | |
170 | bmsk r3,r0,30 | |
171 | j_s.d [blink] | |
172 | bic_s r0,r0,r3 | |
173 | ||
174 | .balign 4 | |
175 | .L7f800000: | |
176 | .long 0x7f800000 | |
177 | .L7fffffff: | |
178 | .long 0x7fffffff | |
179 | ENDFUNC(__mulsf3) |