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| author | Justin Lebar <jlebar@google.com> | 2017-01-31 23:08:57 +0000 |
|---|---|---|
| committer | Justin Lebar <jlebar@google.com> | 2017-01-31 23:08:57 +0000 |
| commit | 06fcea4cd92ecedb8ddcebbe80650d2e92baf2db (patch) | |
| tree | fa8e53f46d0dd2880f4a78ab50464f673d197007 /llvm/lib/CodeGen/MachineBlockPlacement.cpp | |
| parent | d9953d9dd289b87c17ed6b60d14f2db62b1f9dc4 (diff) | |
| download | bcm5719-llvm-06fcea4cd92ecedb8ddcebbe80650d2e92baf2db.tar.gz bcm5719-llvm-06fcea4cd92ecedb8ddcebbe80650d2e92baf2db.zip | |
[NVPTX] Compute approx sqrt as 1/rsqrt(x) rather than x*rsqrt(x).
x*rsqrt(x) returns NaN for x == 0, whereas 1/rsqrt(x) returns 0, as
desired.
Verified that the particular nvptx approximate instructions here do in
fact return 0 for x = 0.
llvm-svn: 293713
Diffstat (limited to 'llvm/lib/CodeGen/MachineBlockPlacement.cpp')
0 files changed, 0 insertions, 0 deletions
