Difference between revisions of "ARM: 64 bit operations"
From ScienceZero
(New page: Logical shift left by Rn ;R0 - least significant word ;R1 - most significant word ;R2 - shift ;Uses R0-R3 ;7 cycles constant mov r1,r1,lsl r...) |
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| − | Logical shift left by Rn | + | ==Logical shift left by Rn== |
;R0 - least significant word | ;R0 - least significant word | ||
;R1 - most significant word | ;R1 - most significant word | ||
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| − | Logical shift left by #n | + | ==Logical shift left by #n== |
;R0 - least significant word | ;R0 - least significant word | ||
;R1 - most significant word | ;R1 - most significant word | ||
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| − | Logical shift left by 1 | + | ==Logical shift left by 1== |
;R0 - least significant word | ;R0 - least significant word | ||
;R1 - most significant word | ;R1 - most significant word | ||
Revision as of 19:49, 12 October 2007
Logical shift left by Rn
;R0 - least significant word
;R1 - most significant word
;R2 - shift
;Uses R0-R3
;7 cycles constant
mov r1,r1,lsl r2
rsb r3,r2,#32
orr r1,1,r0,lsr r3
mov r0,r0,lsl r2
Logical shift left by #n
;R0 - least significant word
;R1 - most significant word
;Uses R0-R1
;3 cycles constant
mov r1,r1,lsl #n
orr r1,r1,r0,lsr #32-n
mov r0,r0,lsl #n
Logical shift left by 1
;R0 - least significant word
;R1 - most significant word
;Uses R0-R1
;2 cycles constant
adds r0,r0,r0
adc r1,r1,r1
Multiplication
