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root/cebix/BasiliskII/src/AmigaOS/asm_support.asm
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Comparing BasiliskII/src/AmigaOS/asm_support.asm (file contents):
Revision 1.2 by cebix, 1999-10-19T19:28:13Z vs.
Revision 1.3 by cebix, 1999-11-01T16:24:08Z

# Line 28 | Line 28
28                  XDEF    _AtomicAnd
29                  XDEF    _AtomicOr
30                  XDEF    _MoveVBR
31 –                XDEF    _TimevalTo64
32 –                XDEF    _TimevalToMacTime
31                  XDEF    _Execute68k
32                  XDEF    _Execute68kTrap
33                  XDEF    _TrapHandlerAsm
# Line 108 | Line 106 | setvbr         movec   d0,vbr
106                  rte
107  
108   *
111 – * Convert timeval to 64 bit microseconds
112 – *
113 –
114 – _TimevalTo64    move.l  4(sp),a0                ;Pointer to timeval
115 –                move.l  8(sp),a1                ;Pointer to high longword of result, low longword is returned in d0
116 –
117 –                move.l  d2,-(sp)
118 –
119 –                move.l  TV_SECS(a0),d0          ;Convert to 64 bit microseconds
120 –                mulu.l  #1000000,d1:d0
121 –                add.l   TV_MICRO(a0),d0
122 –                moveq   #0,d2
123 –                addx.l  d2,d1
124 –                move.l  d1,(a1)
125 –
126 –                move.l  (sp)+,d2
127 –                rts
128 –
129 – *
130 – * Convert timeval to Mac time value (>0: milliseconds, <0: microseconds)
131 – *
132 –
133 – _TimevalToMacTime
134 –                move.l  4(sp),a0                ;Pointer to timeval
135 –
136 –                move.l  d2,-(sp)
137 –
138 –                move.l  TV_SECS(a0),d0          ;Convert to 64 bit microseconds
139 –                mulu.l  #1000000,d1:d0
140 –                add.l   TV_MICRO(a0),d0
141 –                moveq   #0,d2
142 –                addx.l  d2,d1
143 –
144 –                tst.l   d1                      ;Too large for 32 bit microseconds?
145 –                bne.s   1$
146 –                cmp.l   #$7fffffff,d0
147 –                bhi.s   1$
148 –
149 –                neg.l   d0                      ;No, return negative microseconds
150 –                bra.s   2$
151 –
152 – 1$              divu.l  #1000,d1:d0             ;Yes, return milliseconds
153 –
154 – 2$              move.l  (sp)+,d2
155 –                rts
156 –
157 – *
109   * Execute 68k subroutine (must be ended with rts)
110   * r->a[7] and r->sr are unused!
111   *

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