May 2024
Intermediate to advanced
665 pages
23h 2m
English
book
The X86 Microprocessors: Architecture and Programming (8086 to Pentium), 1st Edition
by Lyla B. Das
Content preview from The X86 Microprocessors: Architecture and Programming (8086 to Pentium), 1st Edition
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MULTIPROCESSOR CONFIGURATIONS 481
register. Since data can be in the form of integer, fl oating point or BCD, the load operation has
three variations:
FLD source i)
FILD source ii)
FBLD source iii)
e fi rst instruction takes a real data from the source (memory or register), converts it to tempo-
rary real format and loads it into ST(0), the current stack top. us, the destination is implicit.
Now the register below it is the stack top. e next two instructions in the above list do the
same things – the only diff erence is that the source data (if in memory) is an integer or BCD.
Keep in mind that data in registers can be only in the ‘temporary ...
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