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5d5bf775 | 1 | ; Copyright (C) 2011-2013 Free Software Foundation, Inc. |
85b8555e DD |
2 | ; Contributed by Red Hat. |
3 | ; | |
4 | ; This file is free software; you can redistribute it and/or modify it | |
5 | ; under the terms of the GNU General Public License as published by the | |
6 | ; Free Software Foundation; either version 3, or (at your option) any | |
7 | ; later version. | |
8 | ; | |
9 | ; This file is distributed in the hope that it will be useful, but | |
10 | ; WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | ; General Public License for more details. | |
13 | ; | |
14 | ; Under Section 7 of GPL version 3, you are granted additional | |
15 | ; permissions described in the GCC Runtime Library Exception, version | |
16 | ; 3.1, as published by the Free Software Foundation. | |
17 | ; | |
18 | ; You should have received a copy of the GNU General Public License and | |
19 | ; a copy of the GCC Runtime Library Exception along with this program; | |
20 | ; see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
21 | ; <http://www.gnu.org/licenses/>. | |
22 | ||
23 | ;; 32x32=32 multiply | |
24 | ||
5c0029de DD |
25 | #include "vregs.h" |
26 | ||
27 | ; the G10 only has one register bank, so cannot use these optimized | |
28 | ; versions. Use the C version instead. | |
29 | ||
30 | #ifndef __RL78_G10__ | |
85b8555e DD |
31 | |
32 | ||
33 | ;---------------------------------------------------------------------- | |
34 | ||
35 | ; Register use: | |
36 | ; RB0 RB1 RB2 | |
37 | ; AX op2L res32L res32H | |
38 | ; BC op2H (resH) op1 | |
39 | ; DE count (resL-tmp) | |
40 | ; HL [sp+4] | |
41 | ||
42 | .text | |
43 | nop | |
44 | .global ___mulsi3 ; (USI a, USI b) | |
45 | ___mulsi3: | |
46 | ;; A is at [sp+4] | |
47 | ;; B is at [sp+8] | |
48 | ;; result is in R8..R11 | |
49 | ||
85b8555e DD |
50 | sel rb2 |
51 | push ax | |
52 | push bc | |
53 | sel rb0 | |
54 | ||
55 | clrw ax | |
56 | movw r8, ax | |
57 | movw r16, ax | |
58 | ||
ceb2fc49 | 59 | movw ax, [sp+14] |
85b8555e DD |
60 | cmpw ax, #0 |
61 | bz $1f | |
62 | cmpw ax, #0xffff | |
63 | bnz $2f | |
ceb2fc49 | 64 | movw ax, [sp+8] |
85b8555e DD |
65 | sel rb1 |
66 | subw ax, r_0 | |
67 | sel rb0 | |
68 | br $1f | |
69 | 2: | |
70 | movw bc, ax | |
ceb2fc49 | 71 | movw ax, [sp+8] |
85b8555e DD |
72 | cmpw ax, #0 |
73 | skz | |
74 | call !.Lmul_hi | |
75 | 1: | |
76 | ||
ceb2fc49 | 77 | movw ax, [sp+10] |
85b8555e DD |
78 | cmpw ax, #0 |
79 | bz $1f | |
80 | cmpw ax, #0xffff | |
81 | bnz $2f | |
ceb2fc49 | 82 | movw ax, [sp+12] |
85b8555e DD |
83 | sel rb1 |
84 | subw ax, r_0 | |
85 | sel rb0 | |
86 | br $1f | |
87 | 2: | |
88 | movw bc, ax | |
ceb2fc49 | 89 | movw ax, [sp+12] |
85b8555e DD |
90 | cmpw ax, #0 |
91 | skz | |
92 | call !.Lmul_hi | |
93 | 1: | |
94 | ||
95 | movw ax, r8 | |
96 | movw r16, ax | |
97 | clrw ax | |
98 | movw r8, ax | |
99 | ||
100 | ;; now do R16:R8 += op1L * op2L | |
101 | ||
102 | ;; op1 is in AX.0 (needs to shrw) | |
103 | ;; op2 is in BC.2 and BC.1 (bc can shlw/rolcw) | |
104 | ;; res is in AX.2 and AX.1 (needs to addw) | |
105 | ||
ceb2fc49 | 106 | movw ax, [sp+8] |
85b8555e | 107 | movw r10, ax ; BC.1 |
ceb2fc49 | 108 | movw ax, [sp+12] |
85b8555e DD |
109 | |
110 | cmpw ax, r10 | |
111 | bc $.Lmul_hisi_top | |
112 | movw bc, r10 | |
113 | movw r10, ax | |
114 | movw ax, bc | |
115 | ||
116 | ||
117 | .Lmul_hisi_top: | |
118 | movw bc, #0 | |
119 | ||
120 | .Lmul_hisi_loop: | |
121 | shrw ax, 1 | |
122 | bnc $.Lmul_hisi_no_add | |
123 | sel rb1 | |
124 | addw ax, bc | |
125 | sel rb2 | |
126 | sknc | |
127 | incw ax | |
128 | addw ax, r_2 | |
129 | .Lmul_hisi_no_add: | |
130 | sel rb1 | |
131 | shlw bc, 1 | |
132 | sel rb0 | |
133 | rolwc bc, 1 | |
134 | cmpw ax, #0 | |
135 | bz $.Lmul_hisi_done | |
136 | ||
137 | shrw ax, 1 | |
138 | bnc $.Lmul_hisi_no_add2 | |
139 | sel rb1 | |
140 | addw ax, bc | |
141 | sel rb2 | |
142 | sknc | |
143 | incw ax | |
144 | addw ax, r_2 | |
145 | .Lmul_hisi_no_add2: | |
146 | sel rb1 | |
147 | shlw bc, 1 | |
148 | sel rb0 | |
149 | rolwc bc, 1 | |
150 | cmpw ax, #0 | |
151 | bnz $.Lmul_hisi_loop | |
152 | ||
153 | .Lmul_hisi_done: | |
154 | ||
155 | movw ax, r16 | |
156 | movw r10, ax | |
157 | ||
158 | sel rb2 | |
159 | pop bc | |
160 | pop ax | |
161 | sel rb0 | |
162 | ||
163 | ret | |
164 | ||
165 | ;---------------------------------------------------------------------- | |
166 | ||
ceb2fc49 DD |
167 | .global ___mulhi3 |
168 | ___mulhi3: | |
169 | movw r8, #0 | |
170 | movw ax, [sp+6] | |
171 | movw bc, ax | |
172 | movw ax, [sp+4] | |
173 | ||
85b8555e DD |
174 | ;; R8 += AX * BC |
175 | .Lmul_hi: | |
176 | cmpw ax, bc | |
177 | skc | |
178 | xchw ax, bc | |
179 | br $.Lmul_hi_loop | |
180 | ||
181 | .Lmul_hi_top: | |
182 | sel rb1 | |
183 | addw ax, r_2 | |
184 | sel rb0 | |
185 | .Lmul_hi_no_add: | |
186 | shlw bc, 1 | |
187 | .Lmul_hi_loop: | |
188 | shrw ax, 1 | |
189 | bc $.Lmul_hi_top | |
190 | cmpw ax, #0 | |
191 | bz $.Lmul_hi_done | |
192 | ||
193 | shlw bc, 1 | |
194 | shrw ax, 1 | |
195 | bc $.Lmul_hi_top | |
196 | cmpw ax, #0 | |
197 | bnz $.Lmul_hi_no_add | |
198 | ||
199 | .Lmul_hi_done: | |
200 | ret | |
5c0029de DD |
201 | |
202 | #endif |