33 lines
848 B
ArmAsm
33 lines
848 B
ArmAsm
#
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/*
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* VideoCore IV support library for the ACK
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* © 2013 David Given
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* This file is redistributable under the terms of the 3-clause BSD license.
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* See the file 'Copying' in the root of the distribution for the full text.
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*/
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#include "videocore.h"
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.define .csb
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.sect .data
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.csb:
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! on entry:
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! r0 = un-fixed-up descriptor
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! r1 = value
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add r0, gp ! r0 = fixed up descriptor
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adds8 r2, r0, #1 ! r2 = moving pointer
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ld r3, 4 (r0) ! r3 = count
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adds8 r3, r0, r3 ! r3 = end ptr
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loop:
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ld r4, (r2)++
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b.eq r4, r1, matched ! r2 points at matching addr
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addcmpb.le r2, #4, r3, loop
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notmatched:
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mov r2, r0 ! r2 points at default jump
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matched:
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ld r2, (r2) ! load destination address
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add r2, gp ! fix up r2
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b r2 ! ...and go
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