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PR 16522

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Fix RSQRT.S instruction, add test case.
This commit is contained in:
Andrew Cagney 1998-11-05 09:42:05 +00:00
parent 8de434bf89
commit dd0f610960
3 changed files with 197 additions and 0 deletions
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14
sim/mips/ChangeLog
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@ -1,3 +1,17 @@
start-sanitize-r5900
Thu Nov 5 19:40:12 1998 Andrew Cagney <cagney@b1.cygnus.com>
* r5900.igen (DIV): Do not clear clear SO/SU when already set.
* r5900.igen (RSQRT.S): Do not compute 1/srqt(abs(T)) when T
negative, compute S/sqrt(abs(T)) instead. Correctly set FCSR
bits.
* r5900.igen (RSQRT.S): Handle overflow/underflow better. Check
sign of FT not FS.
(r59fp_store): Clarify "bad value" abort messages.
end-sanitize-r5900
start-sanitize-tx3904 start-sanitize-tx3904
Sat Oct 30 09:49:10 1998 Frank Ch. Eigler <fche@cygnus.com> Sat Oct 30 09:49:10 1998 Frank Ch. Eigler <fche@cygnus.com>

4
sim/testsuite/mips64r5900-elf/ChangeLog
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@ -1,3 +1,7 @@
Thu Nov 5 20:22:21 1998 Andrew Cagney <cagney@b1.cygnus.com>
* f-rsqrt.s: Add tests for 0/sqrt(0) etc.
Thu Oct 29 12:07:06 1998 Frank Ch. Eigler <fche@cygnus.com> Thu Oct 29 12:07:06 1998 Frank Ch. Eigler <fche@cygnus.com>
* t-psrlvw.s (test_psrlvw): Add test for sign-extension in insn. * t-psrlvw.s (test_psrlvw): Add test for sign-extension in insn.

179
sim/testsuite/mips64r5900-elf/f-rsqrt.s Normal file
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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