Suppose that multiple?precision shifts did not exist and that you could use only logical shifts. How would you implement a double?precision shift by using only single?precision shifts?
What will be an ideal response?
In double precision shifting you shift a pair of registers with the bit shifted out of one register shifted in to the
other register; that is, two 32?bit registers act as a single 64?bit register. Without an extended shift, you have to
shift both registers separately and manually insert any bit shifted out. For example, consider the left shift. The
words are in r0, r1 with r0 the most?significant word.
AREA ExtendedShift, CODE, READONLY
ENTRY
LDR r0, = 0x0800FFFF ;00001000000000001111111111111111
LDR r1, = 0x80FFFF00 ;80000000111111111111111100000000
MOVS r1,r1, lsl #1 ;shift r1 left. Update status
MOV r0,r0, lsl #1 ;shift r0 left.
ADDCS r0,r0,#1 ;add in any bit shifted out and saved in status
NOP
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A) ?finite groups B) ?greatest common divisor C) ?lowest common divisor D) ?residue classes
What are the default object styles for any document?
What will be an ideal response?
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Answer the following statement true (T) or false (F)
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Indicate whether the statement is true or false