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diff src/cpu/x86/vm/stubGenerator_x86_64.cpp @ 6084:6759698e3140

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7133857: exp() and pow() should use the x87 ISA on x86 Summary: use x87 instructions to implement exp() and pow() in interpreter/c1/c2. Reviewed-by: kvn, never, twisti
author roland
date Tue, 15 May 2012 10:10:23 +0200
parents da4be62fb889
children 1d7922586cf6
line wrap: on
line diff
--- a/src/cpu/x86/vm/stubGenerator_x86_64.cpp	Mon May 14 09:36:00 2012 -0700
+++ b/src/cpu/x86/vm/stubGenerator_x86_64.cpp	Tue May 15 10:10:23 2012 +0200
@@ -2928,11 +2928,34 @@
       __ addq(rsp, 8);
       __ ret(0);
     }
-
-    // The intrinsic version of these seem to return the same value as
-    // the strict version.
-    StubRoutines::_intrinsic_exp = SharedRuntime::dexp;
-    StubRoutines::_intrinsic_pow = SharedRuntime::dpow;
+    {
+      StubCodeMark mark(this, "StubRoutines", "exp");
+      StubRoutines::_intrinsic_exp = (double (*)(double)) __ pc();
+
+      __ subq(rsp, 8);
+      __ movdbl(Address(rsp, 0), xmm0);
+      __ fld_d(Address(rsp, 0));
+      __ exp_with_fallback(0);
+      __ fstp_d(Address(rsp, 0));
+      __ movdbl(xmm0, Address(rsp, 0));
+      __ addq(rsp, 8);
+      __ ret(0);
+    }
+    {
+      StubCodeMark mark(this, "StubRoutines", "pow");
+      StubRoutines::_intrinsic_pow = (double (*)(double,double)) __ pc();
+
+      __ subq(rsp, 8);
+      __ movdbl(Address(rsp, 0), xmm1);
+      __ fld_d(Address(rsp, 0));
+      __ movdbl(Address(rsp, 0), xmm0);
+      __ fld_d(Address(rsp, 0));
+      __ pow_with_fallback(0);
+      __ fstp_d(Address(rsp, 0));
+      __ movdbl(xmm0, Address(rsp, 0));
+      __ addq(rsp, 8);
+      __ ret(0);
+    }
   }
 
 #undef __