diff options
author | Matt Arsenault <Matthew.Arsenault@amd.com> | 2014-06-19 01:19:19 +0000 |
---|---|---|
committer | Matt Arsenault <Matthew.Arsenault@amd.com> | 2014-06-19 01:19:19 +0000 |
commit | d9b35435b89015d154b0e20f4d4796d936237f84 (patch) | |
tree | c1fbe95a3f550edf4da38ffc64009b0063781697 /lib/Transforms | |
parent | dd8406a6b7f0cbf9082c4bdb2cc8c3b3d5da6eec (diff) | |
download | llvm-d9b35435b89015d154b0e20f4d4796d936237f84.tar.gz llvm-d9b35435b89015d154b0e20f4d4796d936237f84.tar.bz2 llvm-d9b35435b89015d154b0e20f4d4796d936237f84.tar.xz |
R600/SI: Add intrinsics for various math instructions.
These will be used for custom lowering and for library
implementations of various math functions, so it's useful
to expose these as builtins.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211247 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Transforms')
-rw-r--r-- | lib/Transforms/InstCombine/InstCombineCalls.cpp | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/lib/Transforms/InstCombine/InstCombineCalls.cpp b/lib/Transforms/InstCombine/InstCombineCalls.cpp index d4bdd75fa8..ff74564158 100644 --- a/lib/Transforms/InstCombine/InstCombineCalls.cpp +++ b/lib/Transforms/InstCombine/InstCombineCalls.cpp @@ -922,6 +922,20 @@ Instruction *InstCombiner::visitCallInst(CallInst &CI) { break; } + case Intrinsic::AMDGPU_rcp: { + if (const ConstantFP *C = dyn_cast<ConstantFP>(II->getArgOperand(0))) { + const APFloat &ArgVal = C->getValueAPF(); + APFloat Val(ArgVal.getSemantics(), 1.0); + APFloat::opStatus Status = Val.divide(ArgVal, + APFloat::rmNearestTiesToEven); + // Only do this if it was exact and therefore not dependent on the + // rounding mode. + if (Status == APFloat::opOK) + return ReplaceInstUsesWith(CI, ConstantFP::get(II->getContext(), Val)); + } + + break; + } case Intrinsic::stackrestore: { // If the save is right next to the restore, remove the restore. This can // happen when variable allocas are DCE'd. |