annotate gcc/config/score/mul-div.S @ 0:a06113de4d67

first commit
author kent <kent@cr.ie.u-ryukyu.ac.jp>
date Fri, 17 Jul 2009 14:47:48 +0900
parents
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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0
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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1 /* Copyright (C) 2005, 2007 Free Software Foundation, Inc.
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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2 Contributed by Sunnorth
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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3
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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4 This file is part of GCC.
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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5
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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6 GCC is free software; you can redistribute it and/or modify it
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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7 under the terms of the GNU General Public License as published
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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8 by the Free Software Foundation; either version 3, or (at your
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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9 option) any later version.
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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10
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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11 GCC is distributed in the hope that it will be useful, but WITHOUT
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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13 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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14 License for more details.
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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15
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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16 You should have received a copy of the GNU General Public License
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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17 along with GCC; see the file COPYING3. If not see
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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18 <http://www.gnu.org/licenses/>. */
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19
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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20 #define ra r3
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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21 #define a0 r4
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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22 #define a1 r5
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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23 #define a2 r6
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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24 #define a3 r7
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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25 #define v0 r23
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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26
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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27 #define t0 r8
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28 #define t1 r9
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29 #define t2 r10
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30 #define t3 r11
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31 #define t4 r22
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32
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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33 #ifndef __pic__
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34 #if !defined(L_mulsi3) && !defined(L_divsi3)
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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35 .text
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36 .global _flush_cache
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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37 #ifdef __score3__
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38 _flush_cache:
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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39 br r3
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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40 #else
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41 _flush_cache:
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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42 srli r9, r5, 4
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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43 mv r8, r4
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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44 mtsr r9, sr0
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45 1:
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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46 cache 0xe, [r8, 0] # write back invalid dcache
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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47 addi r8, 16
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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48 bcnz 1b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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49 mfcr r8, cr4
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50 bittst! r8, 0x3 # if LDM is enable, write back LDM
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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51 beq! 6f
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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52 ldi r10, 0
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53 cache 0xc, [r10, 0]
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54 6:
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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55 bittst! r8, 0x2 # if LIM is enable, refill it
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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56 beq! 7f
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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57 cache 0x4, [r10, 0]
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58 7:
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59 #nop!
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60 #nop!
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61 #nop!
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62 #nop!
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63 #nop!
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64 mv r8, r4
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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65 mtsr r9, sr0
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66 2:
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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67 cache 0x2, [r8, 0] # invalid unlock icache
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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68 #nop!
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69 #nop!
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70 #nop!
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71 #nop!
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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72 #nop!
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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73 addi r8, 16
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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74 bcnz 2b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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75 br r3
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76 #endif
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77 #endif
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78
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79 /* FUNCTION
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80 (U) INT32 v0 = __mulsi3 ((U) INT32 a0, (U) INT32 a1);
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81 REGISTERS:
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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82 use t0
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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83 modify a0
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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84 a1 -> become 0
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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85 NOTE:
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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86 this seems to give better performance to just rotate and add. */
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87
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88 #ifdef L_mulsi3
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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89 .text
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90 .global __umulsi3
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91 .global __mulsi3
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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92 /* signed multiplication (32x32) */
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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93 .ent __mulsi3
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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94 __umulsi3:
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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95 __mulsi3:
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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96 li t1, 0
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97 __mulsi3_loop:
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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98 andri.c t0, a1, 1 # t0 = multiplier[0]
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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99 srli a1, a1, 1 # a1 /= 2
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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100 beq __mulsi3_loop2 # skip if (t0 == 0)
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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101 add t1, t1, a0 # add multiplicand
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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102 __mulsi3_loop2:
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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103 slli a0, a0, 1 # multiplicand mul 2
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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104 cmpi.c a1, 0
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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105 bne __mulsi3_loop
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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106 mv r4, t1
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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107 br ra
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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108 .end __mulsi3
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109 #endif /* L_mulsi3 */
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110
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111 /* FUNCTION
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112 UINT32 (v0) = __udivsi3 (UINT32 (a0), UINT32 (a1));
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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113 INT32 (v0) = __divsi3 (INT32 (a0), INT32 (a1));
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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114 UINT32 (v0) = __umodsi3 (UINT32 (a0), UINT32 (a1));
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115 INT32 (v0) = __modsi3 (INT32 (a0), INT32 (a1));
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116 DESCRIPTION
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117 performs 32-bit division/modulo.
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118 REGISTERS
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119 used t0 bit-index
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120 t1
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121 modify a0 becomes remainer */
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122 #ifdef L_divsi3
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123 .text
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124 .global __udivsi3
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125 .global __umodsi3
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126 .global __divsi3
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127 .global __modsi3
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128
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129 /* unsigned division */
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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130 .ent __udivsi3
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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131 __udivsi3:
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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132 li t4, 0
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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133 cmpi.c a1, 0
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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134 beq __uds_exit
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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135 li t0, 1
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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136 blt __uds_ok
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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137 __uds_normalize:
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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138 cmp.c a0, a1
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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139 bcc __uds_ok
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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140 slli a1, a1, 1
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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141 slli t0, t0, 1
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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142 cmpi.c a1, 0
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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143 bge __uds_normalize
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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144 __uds_ok:
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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145 __uds_loop2:
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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146 cmp.c a0, a1
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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147 bcc __uds_loop3
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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148 sub a0, a0, a1
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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149 or t4, t4, t0
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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150 __uds_loop3:
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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151 srli t0, t0, 1
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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152 srli a1, a1, 1
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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153 cmpi.c t0, 0
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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154 bne __uds_loop2
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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diff changeset
155 __uds_exit:
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
156 mv a1, a0
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
157 mv r4, t4
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
158 br ra
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
159 .end __udivsi3
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
160
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
161 /* unsigned modulus */
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
162 .ent __umodsi3
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
163 __umodsi3:
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
164 mv t3, ra
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
165 jl __udivsi3
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
166 mv r4, a1
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
167 br t3
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
168 .end __umodsi3
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
169
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
170 /* abs and div */
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
171 .ent __orgsi3
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
172 __orgsi3:
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
173 cmpi.c a0, 0
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
174 bge __orgsi3_a0p
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
175 neg a0, a0
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
176 __orgsi3_a0p:
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
177 cmpi.c a1, 0
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
178 bge __udivsi3
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
179 neg a1, a1
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
180 b __udivsi3 # goto udivsi3
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
181 .end __orgsi3
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
182
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
183 /* signed division */
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
184 .ent __divsi3
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
185 __divsi3:
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
186 mv t3, ra
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
187 xor t2, a0, a1
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
188 jl __orgsi3
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
189 __divsi3_adjust:
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
190 cmpi.c t2, 0
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
191 bge __divsi3_exit
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
192 neg r4, r4
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
193 __divsi3_exit:
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
194 br t3
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
195 .end __divsi3
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
196
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
197 /* signed modulus */
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
198 .ent __modsi3
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
199 __modsi3:
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
200 mv t3, ra
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
201 mv t2, a0
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
202 jl __orgsi3
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
203 mv r4, a1
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
204 b __divsi3_adjust
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
205 .end __modsi3
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
206
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
207 #endif /* L_divsi3 */
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
208 #else /* -fPIC */
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
209 #if !defined(L_mulsi3) && !defined(L_divsi3)
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
210 .set pic
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
211 .text
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
212 .global _flush_cache
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
213 #ifdef __score3__
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
214 _flush_cache:
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
215 br r3
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
216 #else
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
217 _flush_cache:
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
218 addi r0, -8 # pic used
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
219 .cpload r29 # pic used
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
220 srli r9, r5, 4
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
221 mv r8, r4
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
222 mtsr r9, sr0
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
223 1:
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
224 cache 0xe, [r8, 0] # write back invalid dcache
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
225 addi r8, 16
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
226 bcnz 1b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
227 mfcr r8, cr4
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
228 bittst! r8, 0x3 # if LDM is enable, write back LDM
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
229 beq! 6f
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
230 ldi r10, 0
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
231 cache 0xc, [r10, 0]
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
232 6:
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
233 bittst! r8, 0x2 # if LIM is enable, refill it
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
234 beq! 7f
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
235 cache 0x4, [r10, 0]
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
236 7:
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
237 #nop!
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
238 #nop!
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
239 #nop!
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
240 #nop!
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
241 #nop!
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
242 mv r8, r4
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
243 mtsr r9, sr0
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
244 2:
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
245 cache 0x2, [r8, 0] # invalid unlock icache
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
246 #nop!
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
247 #nop!
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
248 #nop!
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
249 #nop!
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
250 #nop!
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
251 addi r8, 16
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
252 bcnz 2b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
253 .cprestore r0, 12 # pic used
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
254 addi r0, 8 # pic used
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
255 br r3
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
256 #endif
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
257 #endif
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
258
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
259 /* FUNCTION
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
260 (U) INT32 v0 = __mulsi3 ((U) INT32 a0, (U) INT32 a1);
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
261 REGISTERS:
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
262 use t0
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
263 modify a0
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
264 a1 -> become 0
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
265 NOTE:
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
266 this seems to give better performance to just rotate and add. */
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
267
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
268 #ifdef L_mulsi3
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
269 .set pic
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
270 .text
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
271 .global __umulsi3
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
272 .global __mulsi3
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
273 /* signed multiplication (32x32) */
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
274 .ent __mulsi3
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
275 __umulsi3:
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
276 __mulsi3:
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
277 addi r0, -8 # pic used
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
278 .cpload r29 # pic used
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
279 li t1, 0
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
280 __mulsi3_loop:
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
281 andri.c t0, a1, 1 # t0 = multiplier[0]
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
282 srli a1, a1, 1 # a1 /= 2
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
283 beq __mulsi3_loop2 # skip if (t0 == 0)
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
284 add t1, t1, a0 # add multiplicand
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
285 __mulsi3_loop2:
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
286 slli a0, a0, 1 # multiplicand mul 2
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
287 cmpi.c a1, 0
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
288 bne __mulsi3_loop
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
289 mv r4, t1
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
290 .cprestore r0, 12 # pic used
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
291 addi r0, 8 # pic used
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
292 br ra
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
293 .end __mulsi3
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
294 #endif /* L_mulsi3 */
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
295
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
296 /* FUNCTION
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
297 UINT32 (v0) = __udivsi3 (UINT32 (a0), UINT32 (a1));
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
298 INT32 (v0) = __divsi3 (INT32 (a0), INT32 (a1));
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
299 UINT32 (v0) = __umodsi3 (UINT32 (a0), UINT32 (a1));
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
300 INT32 (v0) = __modsi3 (INT32 (a0), INT32 (a1));
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
301 DESCRIPTION
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
302 performs 32-bit division/modulo.
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
303 REGISTERS
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
304 used t0 bit-index
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
305 t1
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
306 modify a0 becomes remainer */
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
307 #ifdef L_divsi3
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
308 .set pic
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
309 .text
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
310 .global __udivsi3
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
311 .global __umodsi3
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
312 .global __divsi3
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
313 .global __modsi3
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
314
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
315 /* unsigned division */
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
316 .ent __udivsi3
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
317 __udivsi3:
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
318 addi r0, -8 # pic used
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
319 .cpload r29 # pic used
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
320 li t4, 0
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
321 cmpi.c a1, 0
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
322 beq __uds_exit
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
323 li t0, 1
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
324 blt __uds_ok
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
325 __uds_normalize:
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
326 cmp.c a0, a1
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
327 bcc __uds_ok
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
328 slli a1, a1, 1
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
329 slli t0, t0, 1
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
330 cmpi.c a1, 0
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
331 bge __uds_normalize
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
332 __uds_ok:
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
333 __uds_loop2:
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
334 cmp.c a0, a1
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
335 bcc __uds_loop3
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
336 sub a0, a0, a1
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
337 or t4, t4, t0
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
338 __uds_loop3:
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
339 srli t0, t0, 1
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
340 srli a1, a1, 1
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
341 cmpi.c t0, 0
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
342 bne __uds_loop2
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
343 __uds_exit:
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
344 mv a1, a0
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
345 mv r4, t4
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
346 .cprestore r0, 12 # pic used
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
347 addi r0, 8 # pic used
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
348 br ra
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
349 .end __udivsi3
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
350
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
351 /* unsigned modulus */
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
352 .ent __umodsi3
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
353 __umodsi3:
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
354 addi r0, -8 # pic used
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
355 .cpload r29 # pic used
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
356 li t1, 0
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
357 mv t3, ra
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
358 la r29, __udivsi3
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
359 brl r29
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
360 mv r4, a1
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
361 .cprestore r0, 12 # pic used
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
362 addi r0, 8 # pic used
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
363 br t3
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
364 .end __umodsi3
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
365
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
366 /* abs and div */
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
367 .ent __orgsi3
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
368 __orgsi3:
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
369 cmpi.c a0, 0
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
370 bge __orgsi3_a0p
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
371 neg a0, a0
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
372 __orgsi3_a0p:
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
373 cmpi.c a1, 0
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
374 bge __udivsi3
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
375 neg a1, a1
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
376 b __udivsi3 # goto udivsi3
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
377 .end __orgsi3
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
378
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
379 /* signed division */
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
380 .ent __divsi3
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
381 __divsi3:
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
382 addi r0, -8 # pic used
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
383 .cpload r29 # pic used
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
384 mv t3, ra
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
385 xor t2, a0, a1
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
386 la r29, __orgsi3
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
387 brl r29
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
388 __divsi3_adjust:
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
389 cmpi.c t2, 0
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
390 bge __divsi3_exit
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
391 neg r4, r4
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
392 __divsi3_exit:
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
393 .cprestore r0, 12 # pic used
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
394 addi r0, 8 # pic used
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
395 br t3
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
396 .end __divsi3
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
397
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
398 /* signed modulus */
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
399 .ent __modsi3
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
400 __modsi3:
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
401 addi r0, -8 # pic used
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
402 .cpload r29 # pic used
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
403 mv t3, ra
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
404 mv t2, a0
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
405 la r29, __orgsi3
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
406 brl r29
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
407 mv r4, a1
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
408 b __divsi3_adjust
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
409 .end __modsi3
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
410
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
411 #endif /*L_divsi3 */
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
412 #endif