27 lines
871 B
ArmAsm
27 lines
871 B
ArmAsm
.sect .text; .sect .rom; .sect .data; .sect .bss; .sect .text
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.define .lpb
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! $Id$
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! special version to work with A68S, by CHL
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! compute AB, given LB
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.lpb:
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cmpl r0,fp
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bneq I1
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moval 4(ap),r0
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rsb
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I1:
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movl 4(r0),r1 ! mask for saved registers
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addl2 $24,r0 ! position of AB if no registers saved
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movl $16,r2 ! position of first bit to test
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I2:
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subl3 r2,$28,r3 ! remaining size of mask
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ffs r2,r3,r1,r2 ! find first bit set in mask
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beql I3 ! no more bits set
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addl2 $4,r0 ! for each saved register
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incl r2
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jbr I2
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I3:
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extzv $30,$2,r1,r2 ! Now find out about the stack alignment
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! between fp and ap
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addl2 r2,r0 ! add alignment
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rsb
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