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.include "t-macros.i"
start
### $f3 = $f2 / sqrt ($f1)
test_rsqrt:
loadfp $f1 4.0
loadfp $f2 1.0
rsqrt.s $f3, $f2, $f1
checkfp 0 $f3 0.5
################
## +1.0 / sqrt (+0.0)
## -> 0x7fffffff (+Max) D+SD
test_rsqrt_1:
clearfcsr
loadfp $f1, +1.0
loadfp $f2, +0.0
rsqrt.s $f3, $f1, $f2
checkfpx 1 0x00010021 $f3 0x7fffffff
## -1.0 / sqrt (+0.0)
## -> 0xffffffff (-Max) D+SD
test_rsqrt_2:
clearfcsr
loadfp $f1, -1.0
loadfp $f2, +0.0
rsqrt.s $f3, $f1, $f2
checkfpx 1 0x00010021 $f3 0xffffffff
## 0 / sqrt (-0)
##and 0 / sqrt (0)
## ->0x7fffffff I + SI
test_rsqrt_3a:
clearfcsr
loadfp $f1, +0.0
loadfp $f2, -0.0
rsqrt.s $f3, $f1, $f2
checkfpx 1 0x00020041 $f3 0x7fffffff
test_rsqrt_3b:
clearfcsr
loadfp $f1, +0.0
loadfp $f2, +0.0
rsqrt.s $f3, $f1, $f2
checkfpx 1 0x00020041 $f3 0x7fffffff
## Correctly:
## (-0) / sqrt (-0)
## ->FFFFFFFF (I + SI)
test_rsqrt_4a:
clearfcsr
loadfp $f1, -0.0
loadfp $f2, -0.0
rsqrt.s $f3, $f1, $f2
checkfpx 1 0x00020041 $f3 0xffffffff
test_rsqrt_4b:
clearfcsr
loadfp $f1, -0.0
loadfp $f2, +0.0
rsqrt.s $f3, $f1, $f2
checkfpx 1 0x00020041 $f3 0xffffffff
## (max) / sqrt (min*2) -> no O+SO
##
test_rsqrt_5aa:
clearfcsr
loadfpx $f1, 0x7fffffff
loadfpx $f2, 0x00800001
rsqrt.s $f3, $f1, $f2
checkfpx 1 0x00000001 $f3 0x7fffffff
test_rsqrt_5ab:
clearfcsr
loadfpx $f1, 0x7fffffff
loadfpx $f2, 0x80800001
rsqrt.s $f3, $f1, $f2
checkfpx 1 0x00020041 $f3 0x7fffffff
test_rsqrt_5ba:
clearfcsr
loadfpx $f1, 0xffffffff
loadfpx $f2, 0x00800001
rsqrt.s $f3, $f1, $f2
checkfpx 1 0x00000001 $f3 0xffffffff
test_rsqrt_5bb:
clearfcsr
loadfpx $f1, 0xffffffff
loadfpx $f2, 0x80800001
rsqrt.s $f3, $f1, $f2
checkfpx 1 0x00020041 $f3 0xffffffff
## (max) / sqrt (min*2) -> no U+SU
##
test_rsqrt_6aa:
clearfcsr
loadfpx $f1, 0x00800001
loadfpx $f2, 0x7fffffff
rsqrt.s $f3, $f1, $f2
checkfpx 1 0x00000001 $f3 0x00000000
test_rsqrt_6ab:
clearfcsr
loadfpx $f1, 0x00800001
loadfpx $f2, 0xffffffff
rsqrt.s $f3, $f1, $f2
checkfpx 1 0x00020041 $f3 0x00000000
test_rsqrt_6ba:
clearfcsr
loadfpx $f1, 0x80800001
loadfpx $f2, 0x7fffffff
rsqrt.s $f3, $f1, $f2
checkfpx 1 0x00000001 $f3 0x80000000
test_rsqrt_6bb:
clearfcsr
loadfpx $f1, 0x80800001
loadfpx $f2, 0xffffffff
rsqrt.s $f3, $f1, $f2
checkfpx 1 0x00020041 $f3 0x80000000
## Correctly:
## (max/min) / sqrt ([+-]0)
## ->MAX/MIN (D + SD)
test_rsqrt_7aa:
clearfcsr
loadfpx $f1, 0x7fffffff
loadfpx $f2, 0x00000000
rsqrt.s $f3, $f1, $f2
checkfpx 1 0x00010021 $f3 0x7fffffff
test_rsqrt_7ab:
clearfcsr
loadfpx $f1, 0x7fffffff
loadfpx $f2, 0x80000000
rsqrt.s $f3, $f1, $f2
checkfpx 1 0x00010021 $f3 0x7fffffff
test_rsqrt_7ba:
clearfcsr
loadfpx $f1, 0xffffffff
loadfpx $f2, 0x00000000
rsqrt.s $f3, $f1, $f2
checkfpx 1 0x00010021 $f3 0xffffffff
test_rsqrt_7bb:
clearfcsr
loadfpx $f1, 0xffffffff
loadfpx $f2, 0x80000000
rsqrt.s $f3, $f1, $f2
checkfpx 1 0x00010021 $f3 0xffffffff
## Like max/sqrt but check that bits are set/cleared
##
test_rsqrt_9aa:
clearfcsr
loadfpx $f1, 0x7fffffff
loadfpx $f2, 0x00000000
rsqrt.s $f3, $f1, $f2
loadfpx $f1, 0x00800001
loadfpx $f2, 0xffffffff
rsqrt.s $f3, $f1, $f2
checkfpx 1 0x00020061 $f3 0x00000000
exit0
|
