--- old/src/cpu/x86/vm/stubGenerator_x86_64.cpp	2015-12-02 11:47:00.851110600 -0800
+++ new/src/cpu/x86/vm/stubGenerator_x86_64.cpp	2015-12-02 11:47:00.512076700 -0800
@@ -2987,32 +2987,6 @@
       __ ret(0);
     }
     {
-      StubCodeMark mark(this, "StubRoutines", "sin");
-      StubRoutines::_intrinsic_sin = (double (*)(double)) __ pc();
-
-      __ subq(rsp, 8);
-      __ movdbl(Address(rsp, 0), xmm0);
-      __ fld_d(Address(rsp, 0));
-      __ trigfunc('s');
-      __ fstp_d(Address(rsp, 0));
-      __ movdbl(xmm0, Address(rsp, 0));
-      __ addq(rsp, 8);
-      __ ret(0);
-    }
-    {
-      StubCodeMark mark(this, "StubRoutines", "cos");
-      StubRoutines::_intrinsic_cos = (double (*)(double)) __ pc();
-
-      __ subq(rsp, 8);
-      __ movdbl(Address(rsp, 0), xmm0);
-      __ fld_d(Address(rsp, 0));
-      __ trigfunc('c');
-      __ fstp_d(Address(rsp, 0));
-      __ movdbl(xmm0, Address(rsp, 0));
-      __ addq(rsp, 8);
-      __ ret(0);
-    }
-    {
       StubCodeMark mark(this, "StubRoutines", "tan");
       StubRoutines::_intrinsic_tan = (double (*)(double)) __ pc();
 
@@ -4235,6 +4209,91 @@
 
   }
 
+  address generate_libmSin() {
+    address start = __ pc();
+
+    const XMMRegister x0 = xmm0;
+    const XMMRegister x1 = xmm1;
+    const XMMRegister x2 = xmm2;
+    const XMMRegister x3 = xmm3;
+
+    const XMMRegister x4 = xmm4;
+    const XMMRegister x5 = xmm5;
+    const XMMRegister x6 = xmm6;
+    const XMMRegister x7 = xmm7;
+
+    const Register tmp1 = r8;
+    const Register tmp2 = r9;
+    const Register tmp3 = r10;
+    const Register tmp4 = r11;
+
+    BLOCK_COMMENT("Entry:");
+    __ enter(); // required for proper stackwalking of RuntimeStub frame
+
+#ifdef _WIN64
+    // save the xmm registers which must be preserved 6-7
+    __ subptr(rsp, 4 * wordSize);
+    __ movdqu(Address(rsp, 0), xmm6);
+    __ movdqu(Address(rsp, 2 * wordSize), xmm7);
+#endif
+    __ fast_sin(x0, x1, x2, x3, x4, x5, x6, x7, rax, rbx, rcx, rdx, tmp1, tmp2, tmp3, tmp4);
+
+#ifdef _WIN64
+    // restore xmm regs belonging to calling function
+    __ movdqu(xmm6, Address(rsp, 0));
+    __ movdqu(xmm7, Address(rsp, 2 * wordSize));
+    __ addptr(rsp, 4 * wordSize);
+#endif
+
+    __ leave(); // required for proper stackwalking of RuntimeStub frame
+    __ ret(0);
+
+    return start;
+
+  }
+
+  address generate_libmCos() {
+    address start = __ pc();
+
+    const XMMRegister x0 = xmm0;
+    const XMMRegister x1 = xmm1;
+    const XMMRegister x2 = xmm2;
+    const XMMRegister x3 = xmm3;
+
+    const XMMRegister x4 = xmm4;
+    const XMMRegister x5 = xmm5;
+    const XMMRegister x6 = xmm6;
+    const XMMRegister x7 = xmm7;
+
+    const Register tmp1 = r8;
+    const Register tmp2 = r9;
+    const Register tmp3 = r10;
+    const Register tmp4 = r11;
+
+    BLOCK_COMMENT("Entry:");
+    __ enter(); // required for proper stackwalking of RuntimeStub frame
+
+#ifdef _WIN64
+    // save the xmm registers which must be preserved 6-7
+    __ subptr(rsp, 4 * wordSize);
+    __ movdqu(Address(rsp, 0), xmm6);
+    __ movdqu(Address(rsp, 2 * wordSize), xmm7);
+#endif
+    __ fast_cos(x0, x1, x2, x3, x4, x5, x6, x7, rax, rcx, rdx, tmp1, tmp2, tmp3, tmp4);
+
+#ifdef _WIN64
+    // restore xmm regs belonging to calling function
+    __ movdqu(xmm6, Address(rsp, 0));
+    __ movdqu(xmm7, Address(rsp, 2 * wordSize));
+    __ addptr(rsp, 4 * wordSize);
+#endif
+
+    __ leave(); // required for proper stackwalking of RuntimeStub frame
+    __ ret(0);
+
+    return start;
+
+  }
 
 #undef __
 #define __ masm->
@@ -4425,6 +4484,12 @@
     if (VM_Version::supports_sse2()) {
       StubRoutines::_dexp = generate_libmExp();
       StubRoutines::_dlog = generate_libmLog();
+      if (UseLibmSinIntrinsic) {
+        StubRoutines::_dsin = generate_libmSin();
+      }
+      if (UseLibmCosIntrinsic) {
+        StubRoutines::_dcos = generate_libmCos();
+      }
     }
   }