sto_res.S (1974B)
1| 2| sto_res.sa 3.1 12/10/90 3| 4| Takes the result and puts it in where the user expects it. 5| Library functions return result in fp0. If fp0 is not the 6| users destination register then fp0 is moved to the 7| correct floating-point destination register. fp0 and fp1 8| are then restored to the original contents. 9| 10| Input: result in fp0,fp1 11| 12| d2 & a0 should be kept unmodified 13| 14| Output: moves the result to the true destination reg or mem 15| 16| Modifies: destination floating point register 17| 18 19| Copyright (C) Motorola, Inc. 1990 20| All Rights Reserved 21| 22| For details on the license for this file, please see the 23| file, README, in this same directory. 24 25STO_RES: |idnt 2,1 | Motorola 040 Floating Point Software Package 26 27 28 |section 8 29 30#include "fpsp.h" 31 32 .global sto_cos 33sto_cos: 34 bfextu CMDREG1B(%a6){#13:#3},%d0 |extract cos destination 35 cmpib #3,%d0 |check for fp0/fp1 cases 36 bles c_fp0123 37 fmovemx %fp1-%fp1,-(%a7) 38 moveql #7,%d1 39 subl %d0,%d1 |d1 = 7- (dest. reg. no.) 40 clrl %d0 41 bsetl %d1,%d0 |d0 is dynamic register mask 42 fmovemx (%a7)+,%d0 43 rts 44c_fp0123: 45 cmpib #0,%d0 46 beqs c_is_fp0 47 cmpib #1,%d0 48 beqs c_is_fp1 49 cmpib #2,%d0 50 beqs c_is_fp2 51c_is_fp3: 52 fmovemx %fp1-%fp1,USER_FP3(%a6) 53 rts 54c_is_fp2: 55 fmovemx %fp1-%fp1,USER_FP2(%a6) 56 rts 57c_is_fp1: 58 fmovemx %fp1-%fp1,USER_FP1(%a6) 59 rts 60c_is_fp0: 61 fmovemx %fp1-%fp1,USER_FP0(%a6) 62 rts 63 64 65 .global sto_res 66sto_res: 67 bfextu CMDREG1B(%a6){#6:#3},%d0 |extract destination register 68 cmpib #3,%d0 |check for fp0/fp1 cases 69 bles fp0123 70 fmovemx %fp0-%fp0,-(%a7) 71 moveql #7,%d1 72 subl %d0,%d1 |d1 = 7- (dest. reg. no.) 73 clrl %d0 74 bsetl %d1,%d0 |d0 is dynamic register mask 75 fmovemx (%a7)+,%d0 76 rts 77fp0123: 78 cmpib #0,%d0 79 beqs is_fp0 80 cmpib #1,%d0 81 beqs is_fp1 82 cmpib #2,%d0 83 beqs is_fp2 84is_fp3: 85 fmovemx %fp0-%fp0,USER_FP3(%a6) 86 rts 87is_fp2: 88 fmovemx %fp0-%fp0,USER_FP2(%a6) 89 rts 90is_fp1: 91 fmovemx %fp0-%fp0,USER_FP1(%a6) 92 rts 93is_fp0: 94 fmovemx %fp0-%fp0,USER_FP0(%a6) 95 rts 96 97 |end