Displaying 5 results from an estimated 5 matches for "w15".
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2018 Dec 05
2
Strange regalloc behaviour: one more available register causes much worse allocation
...oblem.
Without the patch generating assembly with llc -mcpu=cortex-a57 everything looks
fine, but with the patch we get this (which comes from the block
bb.17.switchdest13):
.LBB0_16:
mov x29, x24
mov w24, w20
mov w20, w19
mov w19, w7
mov w7, w6
mov w6, w5
mov w5, w2
mov x2, x18
mov w18, w15
orr w15, wzr, #0x1c
str w15, [x8, #8]
mov w0, wzr
mov w15, w18
mov x18, x2
mov w2, w5
mov w5, w6
mov w6, w7
mov w7, w19
mov w19, w20
mov w20, w24
mov x24, x29
b .LBB0_3
It looks like the orr and str have barged in and said "we're using w15!" and all
the rest of the regis...
2018 Dec 05
3
Strange regalloc behaviour: one more available register causes much worse allocation
...with the patch we get this (which comes from the block
bb.17.switchdest13):
.LBB0_16:
mov x29, x24
mov w24, w20
mov w20, w19
mov w19, w7
mov w7, w6
mov w6, w5
mov w5, w2
mov x2, x18
mov w18, w15
orr w15, wzr, #0x1c
str w15, [x8, #8]
mov w0, wzr
mov w15, w18
mov x18, x2
mov w2, w5
mov w5, w6
mov w6, w7
mov w7, w19
mov w19, w20
mov w20, w24
mov x24,...
2020 May 04
2
"Earlyclobber" but for a subset of the inputs
Hi all,
I'm working on a target whose registers have equal-sized subregisters and
all of those subregisters can be named (or the other way round: registers
can be grouped into super registers).
So for instance we've got 16 registers W (as in wide) W0..W15 and 32
registers N (as in narrow) N0..N31. This way, W0 is made by grouping N0 and
N1, W1 is N2 and N3, W2 is N4 and N5, ..., W15 is N30 and N31.
The target has some widening instructions that take a number of N registers
and output a W register. Possible combinations are
Wdest = widen-op Nsrc1,...
2010 Dec 17
3
Alternative to extended recode sintax?
Dear R-users,
I have a factor variable within my data frame which I derive week after week from a POSIXct variable using the cut(var,"weeks") command I have found in the chron package. The levels() command gives me:
[1] "2009-03-30 00:00:00" "2009-04-06 00:00:00" "2009-04-13 00:00:00" "2009-04-20 00:00:00" "2009-04-27 00:00:00"
2013 Mar 01
7
Conditional Weighted Average (ddply or any other function)
Hello R community,
I am computing weighted average statistic by using ddply function:
My data set is:
N1 T1 S1 I1 C1 FY-4 ROE11 EPS11 MKT11
N1 T1 S1 I1 C1 FY-3 ROE12 EPS12 MKT12
N1 T1 S1 I1 C1 FY-2 ROE13 EPS13 MKT13
N1 T1 S1 I1 C1 FY-1 ROE14 EPS14 MKT14
N1 T1 S1 I1 C1 FY0 ROE15 EPS15 MKT15
N1 T1 S1 I1 C1 FY1 ROE16 EPS16 MKT16
N1 T1 S1 I1 C1 FY2 ROE17