Merge sin(a), cos(a) into one instruction. TODO: Implement for ARM and MIPS.

runtime/vm/assembler_ia32_test.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"
 #if defined(TARGET_ARCH_IA32)
 
 #include "vm/assembler.h"
 #include "vm/os.h"
 #include "vm/unit_test.h"
@@ skipping 1998 matching lines @@
 
 
 ASSEMBLER_TEST_RUN(Cosine, test) {
   typedef float (*CosineCode)(float f);
   const float kFloatConst = 0.7;
   float res = reinterpret_cast<CosineCode>(test->entry())(kFloatConst);
   EXPECT_FLOAT_EQ(cos(kFloatConst), res, 0.0001);
 }
 
 
+ASSEMBLER_TEST_GENERATE(SinCos, assembler) {
+  __ fldl(Address(ESP, kWordSize));
+  __ fsincos();
+  __ subl(ESP, Immediate(2 * kWordSize));
+  __ fstpl(Address(ESP, 0));  // cos result.
+  __ movsd(XMM0, Address(ESP, 0));
+  __ fstpl(Address(ESP, 0));  // sin result.
+  __ movsd(XMM1, Address(ESP, 0));
+  __ subsd(XMM1, XMM0);  // sin - cos.
+  __ movsd(Address(ESP, 0), XMM1);
+  __ fldl(Address(ESP, 0));
+  __ addl(ESP, Immediate(2 * kWordSize));
+  __ ret();
+}
+
+
+ASSEMBLER_TEST_RUN(SinCos, test) {
+  typedef double (*SinCosCode)(double d);
+  const double arg = 1.2345;
+  const double expected = sin(arg) - cos(arg);
+  double res = reinterpret_cast<SinCosCode>(test->entry())(arg);
+  EXPECT_FLOAT_EQ(expected, res, 0.000001);
+}
+
+
 ASSEMBLER_TEST_GENERATE(Tangent, assembler) {
   __ fldl(Address(ESP, kWordSize));
   __ fptan();
   __ ffree(0);
   __ fincstp();
   __ ret();
 }
 
 
 ASSEMBLER_TEST_RUN(Tangent, test) {
@@ skipping 844 matching lines @@
                      FieldAddress(ECX, GrowableObjectArray::data_offset()),
                      EAX);
   __ popl(EAX);
   __ popl(CTX);
   __ ret();
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_IA32