Changeset 4653

Timestamp:

Jul 9, 2015, 6:08:35 PM (4 years ago)

Author:

cameron

Message:

packh, packl, signmask

Location:

icGREP/icgrep-devel/icgrep/IDISA

Files:

• idisa_builder.cpp (modified) (2 diffs)
• idisa_builder.h (modified) (1 diff)

icGREP/icgrep-devel/icgrep/IDISA/idisa_builder.cpp

@@ -107 +107 @@
     std::vector<Constant*> Idxs;
     for (unsigned i = field_count/2; i < field_count; i++) {
-        Idxs.push_back(llvm_builder->getInt32(i));    // selects elements 1, 3, ... from first reg.
-        Idxs.push_back(llvm_builder->getInt32(i + field_count)); // selects elements 1, 3, ... from second reg.
+        Idxs.push_back(llvm_builder->getInt32(i));    // selects elements from first reg.
+        Idxs.push_back(llvm_builder->getInt32(i + field_count)); // selects elements from second reg.
     }
     return bitBlockCast(llvm_builder->CreateShuffleVector(aVec, bVec, ConstantVector::get(Idxs)));
@@ -119 +119 @@
     std::vector<Constant*> Idxs;
     for (unsigned i = 0; i < field_count/2; i++) {
-        Idxs.push_back(llvm_builder->getInt32(i));    // selects elements 1, 3, ... from first reg.
-        Idxs.push_back(llvm_builder->getInt32(i + field_count)); // selects elements 1, 3, ... from second reg.
+        Idxs.push_back(llvm_builder->getInt32(i));    // selects elements from first reg.
+        Idxs.push_back(llvm_builder->getInt32(i + field_count)); // selects elements from second reg.
     }
     return bitBlockCast(llvm_builder->CreateShuffleVector(aVec, bVec, ConstantVector::get(Idxs)));
 }
 
+Value * IDISA_Builder::hsimd_packh(unsigned fw, Value * a, Value * b) {
+    unsigned field_count = 2 * mBitBlockSize/fw;
+    Value * aVec = fwCast(fw/2, a);
+    Value * bVec = fwCast(fw/2, b);
+    std::vector<Constant*> Idxs;
+    for (unsigned i = 0; i < field_count; i++) {
+        Idxs.push_back(llvm_builder->getInt32(2*i)); 
+    }
+    return bitBlockCast(llvm_builder->CreateShuffleVector(aVec, bVec, ConstantVector::get(Idxs)));
+}
+
+Value * IDISA_Builder::hsimd_packl(unsigned fw, Value * a, Value * b) {
+    unsigned field_count = 2 * mBitBlockSize/fw;
+    Value * aVec = fwCast(fw/2, a);
+    Value * bVec = fwCast(fw/2, b);
+    std::vector<Constant*> Idxs;
+    for (unsigned i = 0; i < field_count; i++) {
+        Idxs.push_back(llvm_builder->getInt32(2*i+1)); 
+    }
+    return bitBlockCast(llvm_builder->CreateShuffleVector(aVec, bVec, ConstantVector::get(Idxs)));
+}
+
+Value * IDISA_Builder::hsimd_signmask(unsigned fw, Value * a) {
+    Value * mask = llvm_builder->CreateICmpSLT(fwCast(fw, a), ConstantAggregateZero::get(fwVectorType(fw)));
+    return mask;
+}
 
 
+

icGREP/icgrep-devel/icgrep/IDISA/idisa_builder.h

@@ -44 +44 @@
     Value * esimd_mergeh(unsigned fw, Value * a, Value * b);
     Value * esimd_mergel(unsigned fw, Value * a, Value * b);
+    
+    Value * hsimd_packh(unsigned fw, Value * a, Value * b);
+    Value * hsimd_packl(unsigned fw, Value * a, Value * b);
+    Value * hsimd_signmask(unsigned fw, Value * a);
 
 private: