commit 2c37e8ea683250dea7035387773091b7b19096f6
author Logan Chien <loganchien@google.com> Tue Dec 27 17:58:46 2011 +0800
committer Shih-wei Liao <sliao@google.com> Thu Feb 16 10:07:11 2012 -0800
tree a59e09dc9562873cba26a02df6eb1e7e35ebc50e
parent 7a89b6d94a23e2a7a01c8d6760662cba0e56bc1c

Implement floating point compare and long compare.

Change-Id: I63d7889f1d3640f9c6c2d537722b164dd8f09f3e

src/compiler_llvm/method_compiler.cc

diff --git a/src/compiler_llvm/method_compiler.cc b/src/compiler_llvm/method_compiler.cc
index ab90803..04a549b 100644
--- a/src/compiler_llvm/method_compiler.cc
+++ b/src/compiler_llvm/method_compiler.cc
@@ -1359,18 +1359,62 @@
                                         Instruction const* insn,
                                         JType fp_jty,
                                         bool gt_bias) {
-  // UNIMPLEMENTED(WARNING);
+
+  Instruction::DecodedInstruction dec_insn(insn);
+
+  DCHECK(fp_jty == kFloat || fp_jty == kDouble) << "JType: " << fp_jty;
+
+  llvm::Value* src1_value = EmitLoadDalvikReg(dec_insn.vB_, fp_jty, kAccurate);
+  llvm::Value* src2_value = EmitLoadDalvikReg(dec_insn.vC_, fp_jty, kAccurate);
+
+  llvm::Value* cmp_eq = irb_.CreateFCmpOEQ(src1_value, src2_value);
+  llvm::Value* cmp_lt;
+
+  if (gt_bias) {
+    cmp_lt = irb_.CreateFCmpOLT(src1_value, src2_value);
+  } else {
+    cmp_lt = irb_.CreateFCmpULT(src1_value, src2_value);
+  }
+
+  llvm::Value* result = EmitCompareResultSelection(cmp_eq, cmp_lt);
+  EmitStoreDalvikReg(dec_insn.vA_, kInt, kAccurate, result);
+
   irb_.CreateBr(GetNextBasicBlock(dex_pc));
 }
 
 
 void MethodCompiler::EmitInsn_LongCompare(uint32_t dex_pc,
                                           Instruction const* insn) {
-  // UNIMPLEMENTED(WARNING);
+
+  Instruction::DecodedInstruction dec_insn(insn);
+
+  llvm::Value* src1_value = EmitLoadDalvikReg(dec_insn.vB_, kLong, kAccurate);
+  llvm::Value* src2_value = EmitLoadDalvikReg(dec_insn.vC_, kLong, kAccurate);
+
+  llvm::Value* cmp_eq = irb_.CreateICmpEQ(src1_value, src2_value);
+  llvm::Value* cmp_lt = irb_.CreateICmpSLT(src1_value, src2_value);
+
+  llvm::Value* result = EmitCompareResultSelection(cmp_eq, cmp_lt);
+  EmitStoreDalvikReg(dec_insn.vA_, kInt, kAccurate, result);
+
   irb_.CreateBr(GetNextBasicBlock(dex_pc));
 }
 
 
+llvm::Value* MethodCompiler::EmitCompareResultSelection(llvm::Value* cmp_eq,
+                                                        llvm::Value* cmp_lt) {
+
+  llvm::Constant* zero = irb_.getJInt(0);
+  llvm::Constant* pos1 = irb_.getJInt(1);
+  llvm::Constant* neg1 = irb_.getJInt(-1);
+
+  llvm::Value* result_lt = irb_.CreateSelect(cmp_lt, neg1, pos1);
+  llvm::Value* result_eq = irb_.CreateSelect(cmp_eq, zero, result_lt);
+
+  return result_eq;
+}
+
+
 void MethodCompiler::EmitInsn_BinaryConditionalBranch(uint32_t dex_pc,
                                                       Instruction const* insn,
                                                       CondBranchKind cond) {