34 lines
365 B
ArmAsm
34 lines
365 B
ArmAsm
.define .mli2
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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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! 16 bit multiply
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! parameters:
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! bc: multiplicand
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! de: multiplier
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! hl: result (out)
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! multiplier (bc) is left unchanged
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! no detection of overflow
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.mli2:
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ld hl,0
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ld a,16
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0:
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bit 7,d
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jr z,1f
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add hl,bc
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1:
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dec a
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jr z,2f
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ex de,hl
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add hl,hl
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ex de,hl
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add hl,hl
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jr 0b
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2:
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ret
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