commit f5d5c434606161fb017a34cb656fa4aa5a3e076b
author Hal Finkel <hfinkel@anl.gov> Fri Mar 29 08:57:48 2013 +0000
committer Hal Finkel <hfinkel@anl.gov> Fri Mar 29 08:57:48 2013 +0000
tree 4641a3e130c65183f13495d0228b9454e7bf7b60
parent ef484a376cce3729b45ad86eab5724aa83a61823

Add PPC FP rounding instructions fri[mnpz]

These instructions are available on the P5x (and later) and on the A2. They
implement the standard floating-point rounding operations (floor, trunc, etc.).
One caveat: frin (round to nearest) does not implement "ties to even", and so
is only enabled in fast-math mode.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178337 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/PowerPC/PPCInstrInfo.td

diff --git a/lib/Target/PowerPC/PPCInstrInfo.td b/lib/Target/PowerPC/PPCInstrInfo.td
index ea0be97..af3b57f 100644
--- a/lib/Target/PowerPC/PPCInstrInfo.td
+++ b/lib/Target/PowerPC/PPCInstrInfo.td
@@ -1128,9 +1128,38 @@
   def FCTIWZ : XForm_26<63, 15, (outs F8RC:$frD), (ins F8RC:$frB),
                         "fctiwz $frD, $frB", FPGeneral,
                         [(set f64:$frD, (PPCfctiwz f64:$frB))]>;
+
   def FRSP   : XForm_26<63, 12, (outs F4RC:$frD), (ins F8RC:$frB),
                         "frsp $frD, $frB", FPGeneral,
                         [(set f32:$frD, (fround f64:$frB))]>;
+
+  // The frin -> nearbyint mapping is valid only in fast-math mode.
+  def FRIND  : XForm_26<63, 392, (outs F8RC:$frD), (ins F8RC:$frB),
+                        "frin $frD, $frB", FPGeneral,
+                        [(set f64:$frD, (fnearbyint f64:$frB))]>;
+  def FRINS  : XForm_26<63, 392, (outs F4RC:$frD), (ins F4RC:$frB),
+                        "frin $frD, $frB", FPGeneral,
+                        [(set f32:$frD, (fnearbyint f32:$frB))]>;
+
+  def FRIPD  : XForm_26<63, 456, (outs F8RC:$frD), (ins F8RC:$frB),
+                        "frip $frD, $frB", FPGeneral,
+                        [(set f64:$frD, (fceil f64:$frB))]>;
+  def FRIPS  : XForm_26<63, 456, (outs F4RC:$frD), (ins F4RC:$frB),
+                        "frip $frD, $frB", FPGeneral,
+                        [(set f32:$frD, (fceil f32:$frB))]>;
+  def FRIZD  : XForm_26<63, 424, (outs F8RC:$frD), (ins F8RC:$frB),
+                        "friz $frD, $frB", FPGeneral,
+                        [(set f64:$frD, (ftrunc f64:$frB))]>;
+  def FRIZS  : XForm_26<63, 424, (outs F4RC:$frD), (ins F4RC:$frB),
+                        "friz $frD, $frB", FPGeneral,
+                        [(set f32:$frD, (ftrunc f32:$frB))]>;
+  def FRIMD  : XForm_26<63, 488, (outs F8RC:$frD), (ins F8RC:$frB),
+                        "frim $frD, $frB", FPGeneral,
+                        [(set f64:$frD, (ffloor f64:$frB))]>;
+  def FRIMS  : XForm_26<63, 488, (outs F4RC:$frD), (ins F4RC:$frB),
+                        "frim $frD, $frB", FPGeneral,
+                        [(set f32:$frD, (ffloor f32:$frB))]>;
+
   def FSQRT  : XForm_26<63, 22, (outs F8RC:$frD), (ins F8RC:$frB),
                         "fsqrt $frD, $frB", FPSqrt,
                         [(set f64:$frD, (fsqrt f64:$frB))]>;