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Add a floor intrinsic. 

llvm-svn: 160791
This commit is contained in:
Dan Gohman 2012-07-26 17:43:27 +00:00
parent dce0696a36
commit 0b3d782933
3 changed files with 41 additions and 0 deletions
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35
llvm/docs/LangRef.html
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@ -258,6 +258,7 @@
<li><a href="#int_log">'<tt>llvm.log.*</tt>' Intrinsic</a></li>
<li><a href="#int_fma">'<tt>llvm.fma.*</tt>' Intrinsic</a></li>
<li><a href="#int_fabs">'<tt>llvm.fabs.*</tt>' Intrinsic</a></li>
<li><a href="#int_floor">'<tt>llvm.floor.*</tt>' Intrinsic</a></li>
</ol>
</li>
<li><a href="#int_manip">Bit Manipulation Intrinsics</a>
@ -7544,6 +7545,40 @@ LLVM</a>.</p>
</div>
<!-- _______________________________________________________________________ -->
<h4>
<a name="int_floor">'<tt>llvm.floor.*</tt>' Intrinsic</a>
</h4>
<div>
<h5>Syntax:</h5>
<p>This is an overloaded intrinsic. You can use <tt>llvm.floor</tt> on any
floating point or vector of floating point type. Not all targets support all
types however.</p>
<pre>
declare float @llvm.floor.f32(float %Val)
declare double @llvm.floor.f64(double %Val)
declare x86_fp80 @llvm.floor.f80(x86_fp80 %Val)
declare fp128 @llvm.floor.f128(fp128 %Val)
declare ppc_fp128 @llvm.floor.ppcf128(ppc_fp128 %Val)
</pre>
<h5>Overview:</h5>
<p>The '<tt>llvm.floor.*</tt>' intrinsics return the floor of
the operand.</p>
<h5>Arguments:</h5>
<p>The argument and return value are floating point numbers of the same
type.</p>
<h5>Semantics:</h5>
<p>This function returns the same values as the libm <tt>floor</tt> functions
would, and handles error conditions in the same way.</p>
</div>
</div>
<!-- ======================================================================= -->

1
llvm/include/llvm/Intrinsics.td
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@ -261,6 +261,7 @@ let Properties = [IntrReadMem] in {
def int_exp : Intrinsic<[llvm_anyfloat_ty], [LLVMMatchType<0>]>;
def int_exp2 : Intrinsic<[llvm_anyfloat_ty], [LLVMMatchType<0>]>;
def int_fabs : Intrinsic<[llvm_anyfloat_ty], [LLVMMatchType<0>]>;
def int_floor : Intrinsic<[llvm_anyfloat_ty], [LLVMMatchType<0>]>;
}
let Properties = [IntrNoMem] in {

5
llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
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@ -4929,6 +4929,11 @@ SelectionDAGBuilder::visitIntrinsicCall(const CallInst &I, unsigned Intrinsic) {
getValue(I.getArgOperand(0)).getValueType(),
getValue(I.getArgOperand(0))));
return 0;
case Intrinsic::floor:
setValue(&I, DAG.getNode(ISD::FFLOOR, dl,
getValue(I.getArgOperand(0)).getValueType(),
getValue(I.getArgOperand(0))));
return 0;
case Intrinsic::fma:
setValue(&I, DAG.getNode(ISD::FMA, dl,
getValue(I.getArgOperand(0)).getValueType(),