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llvm ir code to fetch the elements

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This commit is contained in:
Zack Rusin 2008-02-12 05:35:51 -05:00
parent e20e89e482
commit cad7bc74d6
2 changed files with 76 additions and 0 deletions
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59
src/mesa/pipe/llvm/storagesoa.cpp
View file

@ -45,6 +45,11 @@ StorageSoa::StorageSoa(llvm::BasicBlock *block,
llvm::Value *input,
llvm::Value *output,
llvm::Value *consts)
: m_block(block),
m_input(input),
m_output(output),
m_consts(consts),
m_idx(0)
{
}
@ -62,6 +67,11 @@ std::vector<llvm::Value*> StorageSoa::inputElement(int idx, int swizzle,
{
std::vector<llvm::Value*> res(4);
res[0] = element(m_input, idx, 0);
res[1] = element(m_input, idx, 0);
res[2] = element(m_input, idx, 0);
res[3] = element(m_input, idx, 0);
return res;
}
@ -78,6 +88,11 @@ std::vector<llvm::Value*> StorageSoa::outputElement(int idx, int swizzle,
{
std::vector<llvm::Value*> res(4);
res[0] = element(m_output, idx, 0);
res[1] = element(m_output, idx, 0);
res[2] = element(m_output, idx, 0);
res[3] = element(m_output, idx, 0);
return res;
}
@ -115,3 +130,47 @@ void StorageSoa::storeAddress(int idx, const std::vector<llvm::Value*> &val,
int mask)
{
}
llvm::Value * StorageSoa::elementPointer(llvm::Value *ptr, int index,
int channel) const
{
std::vector<Value*> indices;
indices.push_back(constantInt(index));
indices.push_back(constantInt(0));//first element in the struct
indices.push_back(constantInt(channel));
indices.push_back(constantInt(0));//f channel
indices.push_back(constantInt(0));//first ptr in the f channel
GetElementPtrInst *getElem = new GetElementPtrInst(ptr,
indices.begin(),
indices.end(),
name("ptr"),
m_block);
return getElem;
}
llvm::Value * StorageSoa::element(llvm::Value *ptr, int index,
int channel) const
{
llvm::Value *res = elementPointer(ptr, index, channel);
LoadInst *load = new LoadInst(res, name("element"), false, m_block);
//load->setAlignment(8);
return load;
}
const char * StorageSoa::name(const char *prefix) const
{
++m_idx;
snprintf(m_name, 32, "%s%d", prefix, m_idx);
return m_name;
}
llvm::ConstantInt * StorageSoa::constantInt(int idx) const
{
if (m_constInts.find(idx) != m_constInts.end()) {
return m_constInts[idx];
}
ConstantInt *constInt = ConstantInt::get(APInt(32, idx));
m_constInts[idx] = constInt;
return constInt;
}

17
src/mesa/pipe/llvm/storagesoa.h
View file

@ -29,6 +29,7 @@
#define STORAGESOA_H
#include <vector>
#include <map>
namespace llvm {
class BasicBlock;
@ -65,7 +66,23 @@ public:
int mask);
void storeAddress(int idx, const std::vector<llvm::Value*> &val,
int mask);
private:
llvm::Value *elementPointer(llvm::Value *ptr, int index,
int channel) const;
llvm::Value *element(llvm::Value *ptr, int index,
int channel) const;
const char *name(const char *prefix) const;
llvm::ConstantInt *constantInt(int) const;
private:
llvm::BasicBlock *m_block;
llvm::Value *m_input;
llvm::Value *m_output;
llvm::Value *m_consts;
mutable std::map<int, llvm::ConstantInt*> m_constInts;
mutable char m_name[32];
mutable int m_idx;
};
#endif