commit 2a6aad9d388bd29bff04aeec3eb9429d436d1873
author Aart Bik <ajcbik@google.com> Thu Feb 25 11:32:32 2016 -0800
committer Aart Bik <ajcbik@google.com> Fri Feb 26 09:16:07 2016 -0800
tree a5fa70df33d410af1be1064c460b6e34f07caf93
parent 9ec486cc08ad658eee33f9bde405b97502562840

Implement fp to bits methods as intrinsics.

Rationale:
Better optimization, better performance.

Results on libcore benchmark:

Most gain is from moving the invariant call out of the loop
after we detect everything is a side-effect free intrinsic.
But generated code in general case is much cleaner too.

Before:
timeFloatToIntBits() in 181 ms.
timeFloatToRawIntBits() in 35 ms.
timeDoubleToLongBits() in 208 ms.
timeDoubleToRawLongBits() in 35 ms.

After:
timeFloatToIntBits() in 36 ms.
timeFloatToRawIntBits() in 35 ms.
timeDoubleToLongBits() in 35 ms.
timeDoubleToRawLongBits() in 34 ms.

bug=11548336

Change-Id: I6e001bd3708e800bd75a82b8950fb3a0fc01766e

compiler/optimizing/intrinsics_list.h

diff --git a/compiler/optimizing/intrinsics_list.h b/compiler/optimizing/intrinsics_list.h
index 88217b3..e1aea92 100644
--- a/compiler/optimizing/intrinsics_list.h
+++ b/compiler/optimizing/intrinsics_list.h
@@ -23,10 +23,12 @@
 
 #define INTRINSICS_LIST(V) \
   V(DoubleDoubleToRawLongBits, kStatic, kNeedsEnvironmentOrCache, kNoSideEffects, kNoThrow) \
+  V(DoubleDoubleToLongBits, kStatic, kNeedsEnvironmentOrCache, kNoSideEffects, kNoThrow) \
   V(DoubleIsInfinite, kStatic, kNeedsEnvironmentOrCache, kNoSideEffects, kNoThrow) \
   V(DoubleIsNaN, kStatic, kNeedsEnvironmentOrCache, kNoSideEffects, kNoThrow) \
   V(DoubleLongBitsToDouble, kStatic, kNeedsEnvironmentOrCache, kNoSideEffects, kNoThrow) \
   V(FloatFloatToRawIntBits, kStatic, kNeedsEnvironmentOrCache, kNoSideEffects, kNoThrow) \
+  V(FloatFloatToIntBits, kStatic, kNeedsEnvironmentOrCache, kNoSideEffects, kNoThrow) \
   V(FloatIsInfinite, kStatic, kNeedsEnvironmentOrCache, kNoSideEffects, kNoThrow) \
   V(FloatIsNaN, kStatic, kNeedsEnvironmentOrCache, kNoSideEffects, kNoThrow) \
   V(FloatIntBitsToFloat, kStatic, kNeedsEnvironmentOrCache, kNoSideEffects, kNoThrow) \