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diff src/cpu/x86/vm/interpreter_x86_32.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 3d2ab563047a
children 1d7922586cf6
line wrap: on
line diff
--- a/src/cpu/x86/vm/interpreter_x86_32.cpp	Mon May 14 09:36:00 2012 -0700
+++ b/src/cpu/x86/vm/interpreter_x86_32.cpp	Tue May 15 10:10:23 2012 +0200
@@ -181,6 +181,19 @@
         __ push_fTOS();
         __ pop_fTOS();
         break;
+    case Interpreter::java_lang_math_pow:
+      __ fld_d(Address(rsp, 3*wordSize)); // second argument
+      __ pow_with_fallback(0);
+      // Store to stack to convert 80bit precision back to 64bits
+      __ push_fTOS();
+      __ pop_fTOS();
+      break;
+    case Interpreter::java_lang_math_exp:
+      __ exp_with_fallback(0);
+      // Store to stack to convert 80bit precision back to 64bits
+      __ push_fTOS();
+      __ pop_fTOS();
+      break;
     default                              :
         ShouldNotReachHere();
   }