projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 3b84e62e RM |
1 | /* mc68020 __mpn_addmul_1 -- Multiply a limb vector with a limb and add |
| 2 | the result to a second limb vector. | |
| 3 | ||
| d4697bc9 | 4 | Copyright (C) 1992-2014 Free Software Foundation, Inc. |
| 3b84e62e RM |
5 | |
| 6 | This file is part of the GNU MP Library. | |
| 7 | ||
| 8 | The GNU MP Library is free software; you can redistribute it and/or modify | |
| f01ec467 AJ |
9 | it under the terms of the GNU Lesser General Public License as published by |
| 10 | the Free Software Foundation; either version 2.1 of the License, or (at your | |
| 3b84e62e RM |
11 | option) any later version. |
| 12 | ||
| 13 | The GNU MP Library is distributed in the hope that it will be useful, but | |
| 14 | WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
| f01ec467 | 15 | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public |
| 3b84e62e RM |
16 | License for more details. |
| 17 | ||
| f01ec467 | 18 | You should have received a copy of the GNU Lesser General Public License |
| ab84e3ff | 19 | along with the GNU MP Library. If not, see <http://www.gnu.org/licenses/>. */ |
| 3b84e62e RM |
20 | |
| 21 | /* | |
| 22 | INPUT PARAMETERS | |
| 23 | res_ptr (sp + 4) | |
| 24 | s1_ptr (sp + 8) | |
| 3de9f02e | 25 | s1_size (sp + 12) |
| 3b84e62e RM |
26 | s2_limb (sp + 16) |
| 27 | */ | |
| 28 | ||
| 3de9f02e | 29 | #include "sysdep.h" |
| 3b84e62e RM |
30 | #include "asm-syntax.h" |
| 31 | ||
| 32 | TEXT | |
| 56d7f029 | 33 | ENTRY(__mpn_addmul_1) |
| 3b84e62e RM |
34 | |
| 35 | #define res_ptr a0 | |
| 36 | #define s1_ptr a1 | |
| 3de9f02e | 37 | #define s1_size d2 |
| 3b84e62e RM |
38 | #define s2_limb d4 |
| 39 | ||
| 40 | /* Save used registers on the stack. */ | |
| 3de9f02e | 41 | moveml R(d2)-R(d5),MEM_PREDEC(sp) |
| 50e73d13 AS |
42 | cfi_adjust_cfa_offset (4*4) |
| 43 | cfi_rel_offset (R(d2), 0) | |
| 44 | cfi_rel_offset (R(d3), 4) | |
| 45 | cfi_rel_offset (R(d4), 8) | |
| 46 | cfi_rel_offset (R(d5), 12) | |
| 3b84e62e RM |
47 | |
| 48 | /* Copy the arguments to registers. Better use movem? */ | |
| 3de9f02e RM |
49 | movel MEM_DISP(sp,20),R(res_ptr) |
| 50 | movel MEM_DISP(sp,24),R(s1_ptr) | |
| 51 | movel MEM_DISP(sp,28),R(s1_size) | |
| 52 | movel MEM_DISP(sp,32),R(s2_limb) | |
| 53 | ||
| 54 | eorw #1,R(s1_size) | |
| 55 | clrl R(d1) | |
| 56 | clrl R(d5) | |
| 57 | lsrl #1,R(s1_size) | |
| 58 | bcc L(L1) | |
| 59 | subql #1,R(s1_size) | |
| 60 | subl R(d0),R(d0) /* (d0,cy) <= (0,0) */ | |
| 61 | ||
| 62 | L(Loop:) | |
| 63 | movel MEM_POSTINC(s1_ptr),R(d3) | |
| 64 | mulul R(s2_limb),R(d1):R(d3) | |
| 65 | addxl R(d0),R(d3) | |
| 66 | addxl R(d5),R(d1) | |
| 67 | addl R(d3),MEM_POSTINC(res_ptr) | |
| 68 | L(L1:) movel MEM_POSTINC(s1_ptr),R(d3) | |
| 69 | mulul R(s2_limb),R(d0):R(d3) | |
| 70 | addxl R(d1),R(d3) | |
| 71 | addxl R(d5),R(d0) | |
| 72 | addl R(d3),MEM_POSTINC(res_ptr) | |
| 73 | ||
| 74 | dbf R(s1_size),L(Loop) | |
| 75 | addxl R(d5),R(d0) | |
| 76 | subl #0x10000,R(s1_size) | |
| 77 | bcc L(Loop) | |
| 3b84e62e RM |
78 | |
| 79 | /* Restore used registers from stack frame. */ | |
| 3de9f02e | 80 | moveml MEM_POSTINC(sp),R(d2)-R(d5) |
| 50e73d13 AS |
81 | cfi_adjust_cfa_offset (-4*4) |
| 82 | cfi_restore (R(d2)) | |
| 83 | cfi_restore (R(d3)) | |
| 84 | cfi_restore (R(d4)) | |
| 85 | cfi_restore (R(d5)) | |
| 3b84e62e RM |
86 | |
| 87 | rts | |
| 56d7f029 | 88 | END(__mpn_addmul_1) |