26 lines
417 B
ArmAsm
26 lines
417 B
ArmAsm
.define sar
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.sect .text
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.sect .rom
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.sect .data
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.sect .bss
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.sect .text
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!R1 contains description address
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!R3 contains element number
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!base address is on stack
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sar:
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popl saveret, *RR14
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sub R3, 0(R1)
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ld R0, 4(R1) !nr of bytes per element
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mult RR2, R0
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add R3, *RR14
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inc R15, $2
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sra R0 !nr of words per element
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jr EQ, 1f
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ldir *RR2, *RR14, R0
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jr 2f
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1: pop R1, *RR14
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ldb *RR2, RL1
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2: ldl RR2, saveret
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jp *RR2
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