PPC/s390: [builtins] Introduce proper Float64Cos and Float64Sin.

src/crankshaft/ppc/lithium-codegen-ppc.cc

Index: src/crankshaft/ppc/lithium-codegen-ppc.cc
diff --git a/src/crankshaft/ppc/lithium-codegen-ppc.cc b/src/crankshaft/ppc/lithium-codegen-ppc.cc
index acfb76dcad9723d2a8c753e29cd28bad6d11049c..3d53ac6dbc87c7ee728b00f4c271281dceec84b5 100644
--- a/src/crankshaft/ppc/lithium-codegen-ppc.cc
+++ b/src/crankshaft/ppc/lithium-codegen-ppc.cc
@@ -3774,6 +3774,20 @@ void LCodeGen::DoPower(LPower* instr) {
   }
 }
 
+void LCodeGen::DoMathCos(LMathCos* instr) {
+  __ PrepareCallCFunction(0, 1, scratch0());
+  __ MovToFloatParameter(ToDoubleRegister(instr->value()));
+  __ CallCFunction(ExternalReference::ieee754_cos_function(isolate()), 0, 1);
+  __ MovFromFloatResult(ToDoubleRegister(instr->result()));
+}
+
+void LCodeGen::DoMathSin(LMathSin* instr) {
+  __ PrepareCallCFunction(0, 1, scratch0());
+  __ MovToFloatParameter(ToDoubleRegister(instr->value()));
+  __ CallCFunction(ExternalReference::ieee754_sin_function(isolate()), 0, 1);
+  __ MovFromFloatResult(ToDoubleRegister(instr->result()));
+}
+
 void LCodeGen::DoMathExp(LMathExp* instr) {
   __ PrepareCallCFunction(0, 1, scratch0());
   __ MovToFloatParameter(ToDoubleRegister(instr->value()));