Implement i64<->fp using the fctidz/fcfid instructions on PowerPC when we

are allowed to generate 64-bit-only PowerPC instructions for 32 bit hosts,
such as the PowerPC 970.

This speeds up 189.lucas from 81.99 to 32.64 seconds.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23250 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 9 insertions, 3 deletions

diff --git a/lib/Target/PowerPC/PPCISelLowering.h b/lib/Target/PowerPC/PPCISelLowering.h
index 924a672..eecbfda 100644
--- a/lib/Target/PowerPC/PPCISelLowering.h
+++ b/lib/Target/PowerPC/PPCISelLowering.h
@@ -29,9 +29,15 @@ namespace llvm {
       ///
       FSEL,
       
-      /// FCTIWZ - The FCTIWZ instruction, taking an f32 or f64 operand,
-      /// producing an f64 value.
-      FCTIWZ,
+      /// FCFID - The FCFID instruction, taking an f64 operand and producing
+      /// and f64 value containing the FP representation of the integer that
+      /// was temporarily in the f64 operand.
+      FCFID,
+      
+      /// FCTI[D,W]Z - The FCTIDZ and FCTIWZ instructions, taking an f32 or f64 
+      /// operand, producing an f64 value containing the integer representation
+      /// of that FP value.
+      FCTIDZ, FCTIWZ,
     };
   }