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#include "storage.h"
#include "pipe/tgsi/exec/tgsi_token.h"
#include <llvm/BasicBlock.h>
#include <llvm/Module.h>
#include <llvm/Value.h>
#include <llvm/CallingConv.h>
#include <llvm/Constants.h>
#include <llvm/DerivedTypes.h>
#include <llvm/InstrTypes.h>
#include <llvm/Instructions.h>
using namespace llvm;
Storage::Storage(llvm::BasicBlock *block, llvm::Value *out,
llvm::Value *in, llvm::Value *consts)
: m_block(block), m_OUT(out),
m_IN(in), m_CONST(consts),
m_temps(32), m_dstCache(32),
m_idx(0)
{
m_floatVecType = VectorType::get(Type::FloatTy, 4);
m_intVecType = VectorType::get(IntegerType::get(32), 4);
m_undefFloatVec = UndefValue::get(m_floatVecType);
m_undefIntVec = UndefValue::get(m_intVecType);
m_numConsts = 0;
}
//can only build vectors with all members in the [0, 9] range
llvm::Constant *Storage::shuffleMask(int vec)
{
if (m_intVecs.find(vec) != m_intVecs.end()) {
return m_intVecs[vec];
}
int origVec = vec;
Constant* const_vec = 0;
if (origVec == 0) {
const_vec = Constant::getNullValue(m_intVecType);
} else {
int x = vec / 1000; vec -= x * 1000;
int y = vec / 100; vec -= y * 100;
int z = vec / 10; vec -= z * 10;
int w = vec;
std::vector<Constant*> elems;
elems.push_back(constantInt(x));
elems.push_back(constantInt(y));
elems.push_back(constantInt(z));
elems.push_back(constantInt(w));
const_vec = ConstantVector::get(m_intVecType, elems);
}
m_intVecs[origVec] = const_vec;
return const_vec;
}
llvm::ConstantInt *Storage::constantInt(int idx)
{
if (m_constInts.find(idx) != m_constInts.end()) {
return m_constInts[idx];
}
ConstantInt *const_int = ConstantInt::get(APInt(32, idx));
m_constInts[idx] = const_int;
return const_int;
}
llvm::Value *Storage::inputElement(int idx)
{
if (m_inputs.find(idx) != m_inputs.end()) {
return m_inputs[idx];
}
GetElementPtrInst *getElem = new GetElementPtrInst(m_IN,
constantInt(idx),
name("input_ptr"),
m_block);
LoadInst *load = new LoadInst(getElem, name("input"),
false, m_block);
m_inputs[idx] = load;
return load;
}
llvm::Value *Storage::constElement(int idx)
{
m_numConsts = ((idx + 1) > m_numConsts) ? (idx + 1) : m_numConsts;
if (m_consts.find(idx) != m_consts.end()) {
return m_consts[idx];
}
GetElementPtrInst *getElem = new GetElementPtrInst(m_CONST,
constantInt(idx),
name("const_ptr"),
m_block);
LoadInst *load = new LoadInst(getElem, name("const"),
false, m_block);
m_consts[idx] = load;
return load;
}
llvm::Value *Storage::shuffleVector(llvm::Value *vec, int shuffle)
{
Constant *mask = shuffleMask(shuffle);
ShuffleVectorInst *res =
new ShuffleVectorInst(vec, m_undefFloatVec, mask,
name("shuffle"), m_block);
return res;
}
llvm::Value *Storage::tempElement(int idx) const
{
Value *ret = m_temps[idx];
if (!ret)
return m_undefFloatVec;
return ret;
}
void Storage::setTempElement(int idx, llvm::Value *val, int mask)
{
if (mask != TGSI_WRITEMASK_XYZW) {
llvm::Value *templ = m_temps[idx];
val = maskWrite(val, mask, templ);
}
m_temps[idx] = val;
}
void Storage::store(int dstIdx, llvm::Value *val, int mask)
{
if (mask != TGSI_WRITEMASK_XYZW) {
llvm::Value *templ = m_dstCache[dstIdx];
val = maskWrite(val, mask, templ);
}
GetElementPtrInst *getElem = new GetElementPtrInst(m_OUT,
constantInt(dstIdx),
name("out_ptr"),
m_block);
StoreInst *st = new StoreInst(val, getElem, false, m_block);
//m_dstCache[dstIdx] = st;
}
llvm::Value *Storage::maskWrite(llvm::Value *src, int mask, llvm::Value *templ)
{
llvm::Value *dst = templ;
if (!dst)
dst = Constant::getNullValue(m_floatVecType);
if ((mask & TGSI_WRITEMASK_X)) {
llvm::Value *x = new ExtractElementInst(src, unsigned(0),
name("x"), m_block);
dst = new InsertElementInst(dst, x, unsigned(0),
name("dstx"), m_block);
}
if ((mask & TGSI_WRITEMASK_Y)) {
llvm::Value *y = new ExtractElementInst(src, unsigned(1),
name("y"), m_block);
dst = new InsertElementInst(dst, y, unsigned(1),
name("dsty"), m_block);
}
if ((mask & TGSI_WRITEMASK_Z)) {
llvm::Value *z = new ExtractElementInst(src, unsigned(2),
name("z"), m_block);
dst = new InsertElementInst(dst, z, unsigned(2),
name("dstz"), m_block);
}
if ((mask & TGSI_WRITEMASK_W)) {
llvm::Value *w = new ExtractElementInst(src, unsigned(3),
name("w"), m_block);
dst = new InsertElementInst(dst, w, unsigned(3),
name("dstw"), m_block);
}
return dst;
}
const char * Storage::name(const char *prefix)
{
++m_idx;
snprintf(m_name, 32, "%s%d", prefix, m_idx);
return m_name;
}
int Storage::numConsts() const
{
return m_numConsts;
}
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