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Add "generic" 4, 8, and 16-wide targets.

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When used, these targets end up with calls to undefined functions for all
of the various special vector stuff ispc needs to compile ispc programs
(masked store, gather, min/max, sqrt, etc.).

These targets are not yet useful for anything, but are a step toward
having an option to C++ code with calls out to intrinsics.

Reorganized the directory structure a bit and put the LLVM bitcode used
to define target-specific stuff (as well as some generic built-ins stuff)
into a builtins/ directory.

Note that for building on Windows, it's now necessary to set a LLVM_VERSION
environment variable (with values like LLVM_2_9, LLVM_3_0, LLVM_3_1svn, etc.)
This commit is contained in:
Matt Pharr
2011-12-19 13:46:50 -08:00
parent 6dbb15027a
commit 1d9201fe3d
31 changed files with 1249 additions and 649 deletions
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27
llvmutil.cpp
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@@ -105,11 +105,14 @@ InitLLVMUtil(llvm::LLVMContext *ctx, Target target) {
LLVMTypes::FloatPointerType = llvm::PointerType::get(LLVMTypes::FloatType, 0);
LLVMTypes::DoublePointerType = llvm::PointerType::get(LLVMTypes::DoubleType, 0);
// Note that both the mask and bool vectors are vector of int32s
// (not i1s). LLVM ends up generating much better SSE code with
// this representation.
LLVMTypes::MaskType = LLVMTypes::BoolVectorType =
llvm::VectorType::get(llvm::Type::getInt32Ty(*ctx), target.vectorWidth);
if (target.maskBitCount == 1)
LLVMTypes::MaskType = LLVMTypes::BoolVectorType =
llvm::VectorType::get(llvm::Type::getInt1Ty(*ctx), target.vectorWidth);
else {
assert(target.maskBitCount == 32);
LLVMTypes::MaskType = LLVMTypes::BoolVectorType =
llvm::VectorType::get(llvm::Type::getInt32Ty(*ctx), target.vectorWidth);
}
LLVMTypes::Int1VectorType =
llvm::VectorType::get(llvm::Type::getInt1Ty(*ctx), target.vectorWidth);
@@ -141,7 +144,11 @@ InitLLVMUtil(llvm::LLVMContext *ctx, Target target) {
std::vector<llvm::Constant *> maskOnes;
llvm::Constant *onMask = NULL;
onMask = llvm::ConstantInt::get(llvm::Type::getInt32Ty(*ctx), -1,
if (target.maskBitCount == 1)
onMask = llvm::ConstantInt::get(llvm::Type::getInt1Ty(*ctx), 1,
false /*unsigned*/); // 0x1
else
onMask = llvm::ConstantInt::get(llvm::Type::getInt32Ty(*ctx), -1,
true /*signed*/); // 0xffffffff
for (int i = 0; i < target.vectorWidth; ++i)
@@ -150,8 +157,12 @@ InitLLVMUtil(llvm::LLVMContext *ctx, Target target) {
std::vector<llvm::Constant *> maskZeros;
llvm::Constant *offMask = NULL;
offMask = llvm::ConstantInt::get(llvm::Type::getInt32Ty(*ctx), 0,
true /*signed*/);
if (target.maskBitCount == 1)
offMask = llvm::ConstantInt::get(llvm::Type::getInt1Ty(*ctx), 0,
true /*signed*/);
else
offMask = llvm::ConstantInt::get(llvm::Type::getInt32Ty(*ctx), 0,
true /*signed*/);
for (int i = 0; i < target.vectorWidth; ++i)
maskZeros.push_back(offMask);