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Add ISD::FROUND for libm round()

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All libm floating-point rounding functions, except for round(), had their own
ISD nodes. Recent PowerPC cores have an instruction for round(), and so here I'm
adding ISD::FROUND so that round() can be custom lowered as well.

For the most part, this is straightforward. I've added an intrinsic
and a matching ISD node just like those for nearbyint() and friends. The
SelectionDAG pattern I've named frnd (because ISD::FP_ROUND has already claimed
fround).

This will be used by the PowerPC backend in a follow-up commit.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187926 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Hal Finkel
2013-08-07 22:49:12 +00:00
parent 6fa33f5dd9
commit 41418d17cc
19 changed files with 168 additions and 3 deletions
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5
lib/Transforms/Vectorize/LoopVectorize.cpp
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@ -1772,6 +1772,7 @@ getIntrinsicIDForCall(CallInst *CI, const TargetLibraryInfo *TLI) {
case Intrinsic::trunc:
case Intrinsic::rint:
case Intrinsic::nearbyint:
case Intrinsic::round:
case Intrinsic::pow:
case Intrinsic::fma:
case Intrinsic::fmuladd:
@ -1850,6 +1851,10 @@ getIntrinsicIDForCall(CallInst *CI, const TargetLibraryInfo *TLI) {
case LibFunc::nearbyintf:
case LibFunc::nearbyintl:
return Intrinsic::nearbyint;
case LibFunc::round:
case LibFunc::roundf:
case LibFunc::roundl:
return Intrinsic::round;
case LibFunc::pow:
case LibFunc::powf:
case LibFunc::powl: