參數(shù)資料
型號: DRM049
英文描述: Internet Connectivity with HCS12 16-bit Microcontroller using the ACP
中文描述: 互聯(lián)網(wǎng)連接與HCS12的16位微控制器使用非加太
文件頁數(shù): 34/80頁
文件大小: 1025K
代理商: DRM049
Software
Designer Reference Manual
DRM040 — Rev 0
34
Software
MOTOROLA
Figure 3-5. mpy16
mpy16
save pointer H:X
on stack
allocate 6 bytes on
stack as work area
push multiplier &
multiplicant onto
stack
multiply multiplier low
with multiplicant low
save product on
stack
multiply multilier low
with multiplicant high
add products low byte
to previous prod. high
add possible carry to
high byte
save product on
stack
multiply multiplier high
with multiplicant low
add products low byte
to previous prod. high
add possible carry to
high byte
save product on
stack
multiply multiplier high
with multiplicant high
add products low byte
to previous prod. high
add possible carry to
high byte
save product on
stack
disable interrupts if
enabled
recall H:X from
stack
restore original
interrupt flag status
return
store 32-bit product
over original multiplier
and multiplicant
correct stack
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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