44 lines
752 B
ArmAsm
44 lines
752 B
ArmAsm
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#
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#include "powerpc.h"
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.sect .text
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! Load from bounds-checked array.
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!
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! On entry:
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! r3 = ptr to descriptor
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! r4 = index
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! r5 = address of array
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.define .lar4
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.lar4:
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mfspr r10, lr
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bl .aar4
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mtspr lr, r10
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! r3 = ptr to element
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! r0 = size of element
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cmpi cr0, 0, r0, 1
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bc IFFALSE, EQ, 1f
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! Load 1 byte.
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lbz r4, 0(r3)
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stwu r4, -4(sp)
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bclr ALWAYS, 0, 0
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1:
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cmpi cr0, 0, r0, 2
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bc IFFALSE, EQ, 2f
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! Load 2 bytes.
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lhz r4, 0(r3)
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stwu r4, -4(sp)
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bclr ALWAYS, 0, 0
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2:
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! Load r0 bytes, where r0 must be a positive multiple of 4.
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subf sp, r0, sp ! move stack pointer down
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or r5, r0, r0 ! index r5 = length r0
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3:
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addic. r5, r5, -4 ! r5 -= 4
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lwzx r4, r5, r3
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stwx r4, r5, sp
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bc IFTRUE, GT, 3b ! loop if r5 > 0
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bclr ALWAYS, 0, 0
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