| 1 | ############################################################################## |
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| 2 | # setjmp.S -- CR16 setjmp routine # |
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| 3 | # # |
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| 4 | # Copyright (c) 2004 National Semiconductor Corporation # |
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| 5 | # # |
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| 6 | # The authors hereby grant permission to use, copy, modify, distribute, # |
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| 7 | # and license this software and its documentation for any purpose, provided # |
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| 8 | # that existing copyright notices are retained in all copies and that this # |
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| 9 | # notice is included verbatim in any distributions. No written agreement, # |
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| 10 | # license, or royalty fee is required for any of the authorized uses. # |
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| 11 | # Modifications to this software may be copyrighted by their authors # |
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| 12 | # and need not follow the licensing terms described here, provided that # |
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| 13 | # the new terms are clearly indicated on the first page of each file where # |
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| 14 | # they apply. # |
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| 15 | # # |
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| 16 | # C library -- setjmp, longjmp # |
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| 17 | # longjmp(a,v) # |
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| 18 | # will generate a "return(v)" # |
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| 19 | # from the last call to # |
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| 20 | # setjmp(a) # |
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| 21 | # by restoring r7-ra, sp, # |
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| 22 | # and pc from 'a' # |
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| 23 | # and doing a return. (Makes sure that longjmp never returns 0). # |
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| 24 | ############################################################################## |
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| 25 | |
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| 26 | .text |
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| 27 | .file "setjmp.s" |
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| 28 | .align 4 |
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| 29 | |
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| 30 | .globl _setjmp |
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| 31 | .align 4 |
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| 32 | _setjmp: |
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| 33 | #r3, r2: .blkw |
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| 34 | storw r7, 0(r3,r2) |
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| 35 | addd $2, (r3,r2) |
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| 36 | storw r8, 0(r3,r2) |
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| 37 | addd $2, (r3,r2) |
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| 38 | storw r9, 0(r3,r2) |
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| 39 | addd $2, (r3,r2) |
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| 40 | storw r10, 0(r3,r2) |
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| 41 | addd $2, (r3,r2) |
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| 42 | storw r11, 0(r3,r2) |
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| 43 | addd $2, (r3,r2) |
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| 44 | |
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| 45 | stord (r12), 0(r3,r2) |
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| 46 | addd $4, (r3,r2) |
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| 47 | stord (r13), 0(r3,r2) |
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| 48 | addd $4, (r3,r2) |
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| 49 | |
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| 50 | stord (ra), 0(r3,r2) |
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| 51 | addd $4, (r3,r2) |
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| 52 | stord (sp), 0(r3,r2) |
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| 53 | |
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| 54 | movd $0,(r1,r0) |
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| 55 | jump (ra) |
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| 56 | |
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| 57 | .globl _longjmp |
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| 58 | _longjmp: |
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| 59 | #r3, r2: .blkw # pointer save area |
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| 60 | #r5, r4: .blkw # ret vlaue |
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| 61 | |
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| 62 | loadw 0(r3,r2), r7 |
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| 63 | addd $2, (r3,r2) |
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| 64 | loadw 0(r3,r2), r8 |
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| 65 | addd $2, (r3,r2) |
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| 66 | loadw 0(r3,r2), r9 |
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| 67 | addd $2, (r3,r2) |
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| 68 | loadw 0(r3,r2), r10 |
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| 69 | addd $2, (r3,r2) |
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| 70 | loadw 0(r3,r2), r11 |
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| 71 | addd $2, (r3,r2) |
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| 72 | |
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| 73 | loadd 0(r3,r2), (r12) |
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| 74 | addd $4, (r3,r2) |
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| 75 | loadd 0(r3,r2), (r13) |
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| 76 | addd $4, (r3,r2) |
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| 77 | |
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| 78 | loadd 0(r3,r2), (ra) |
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| 79 | addd $4, (r3,r2) |
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| 80 | loadd 0(r3,r2), (sp) |
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| 81 | |
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| 82 | #ifdef __INT32__ |
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| 83 | movd (r5,r4), (r1,r0) |
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| 84 | cmpd $0, (r5,r4) |
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| 85 | bne end1 |
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| 86 | movd $1, (r1,r0) |
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| 87 | #else |
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| 88 | movw r4, r0 |
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| 89 | cmpw $0, r4 |
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| 90 | bne end1 |
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| 91 | movw $1, r0 |
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| 92 | #endif |
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| 93 | end1: |
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| 94 | jump (ra) |
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| 95 | .align 4 |
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| 96 | |
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| 97 | |
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