MIPS: Minor bug fixes to macro-asm and simulator.

src/mips/simulator-mips.cc

Index: src/mips/simulator-mips.cc
diff --git a/src/mips/simulator-mips.cc b/src/mips/simulator-mips.cc
index 938982ba2a5456f1b73aed03f0b9be9c6060f6a1..30e12e75b1bd3bff66715244d07297720973c6fb 100644
--- a/src/mips/simulator-mips.cc
+++ b/src/mips/simulator-mips.cc
@@ -1484,7 +1484,7 @@ void Simulator::SoftwareInterrupt(Instruction* instr) {
           case ExternalReference::BUILTIN_FP_CALL:
             GetFpArgs(&dval0);
             PrintF("Call to host function at %p with arg %f",
-                FUNCTION_ADDR(target), dval1);
+                FUNCTION_ADDR(target), dval0);
             break;
           case ExternalReference::BUILTIN_FP_INT_CALL:
             GetFpArgs(&dval0, &ival);