From bfde080ce0ef03f6a95de38089b306d3c7a50f51 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Thu, 8 Sep 2005 17:40:49 +0000
Subject: [PATCH] add patterns for x?oris?

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23268 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/PowerPC/PPCInstrFormats.td |  5 +++-
 lib/Target/PowerPC/PPCInstrInfo.td    | 34 +++++++++++++++++++++------
 2 files changed, 31 insertions(+), 8 deletions(-)

diff --git a/lib/Target/PowerPC/PPCInstrFormats.td b/lib/Target/PowerPC/PPCInstrFormats.td
index 0b71daf7bc2..320bd7bae38 100644
--- a/lib/Target/PowerPC/PPCInstrFormats.td
+++ b/lib/Target/PowerPC/PPCInstrFormats.td
@@ -123,11 +123,14 @@ class DForm_2_r0<bits<6> opcode, dag OL, string asmstr, list<dag> pattern>
 class DForm_3<bits<6> opcode, dag OL, string asmstr>
   : DForm_1<opcode, OL, asmstr>;
 
-class DForm_4<bits<6> opcode, dag OL, string asmstr> : I<opcode, OL, asmstr> {
+class DForm_4<bits<6> opcode, dag OL, string asmstr, list<dag> pattern>
+ : I<opcode, OL, asmstr> {
   bits<5>  B;
   bits<5>  A;
   bits<16> C;
   
+  let Pattern = pattern;
+  
   let Inst{6-10}  = A;
   let Inst{11-15} = B;
   let Inst{16-31} = C;
diff --git a/lib/Target/PowerPC/PPCInstrInfo.td b/lib/Target/PowerPC/PPCInstrInfo.td
index 144469daa0f..c5625a8a3b3 100644
--- a/lib/Target/PowerPC/PPCInstrInfo.td
+++ b/lib/Target/PowerPC/PPCInstrInfo.td
@@ -72,15 +72,29 @@ def immSExt16  : PatLeaf<(imm), [{
   // field.  Used by instructions like 'addi'.
   return (int)N->getValue() == (short)N->getValue();
 }]>;
+def immZExt16  : PatLeaf<(imm), [{
+  // immZExt16 predicate - True if the immediate fits in a 16-bit zero extended
+  // field.  Used by instructions like 'ori'.
+  return (unsigned)N->getValue() == (unsigned short)N->getValue();
+}]>;
 def imm16Shifted : PatLeaf<(imm), [{
   // imm16Shifted predicate - True if only bits in the top 16-bits of the
   // immediate are set.  Used by instructions like 'addis'.
   return ((unsigned)N->getValue() & 0xFFFF0000U) == (unsigned)N->getValue();
 }], [{
-  // Transformation predicate: shift the immediate value down into the low bits.
+  // Transformation function: shift the immediate value down into the low bits.
   return getI32Imm((unsigned)N->getValue() >> 16);
 }]>;
 
+/*
+// Example of a legalize expander: Only for PPC64.
+def : Expander<(set i64:$dst, (fp_to_sint f64:$src)),
+               [(set f64:$tmp , (FCTIDZ f64:$src)),
+                (set i32:$tmpFI, (CreateNewFrameIndex 8, 8)),
+                (store f64:$tmp, i32:$tmpFI),
+                (set i64:$dst, (load i32:$tmpFI))],
+                Subtarget_PPC64>;
+*/
 
 class isPPC64 { bit PPC64 = 1; }
 class isVMX   { bit VMX = 1; }
@@ -238,17 +252,23 @@ def STWU : DForm_3<37, (ops GPRC:$rS, s16imm:$disp, GPRC:$rA),
                    "stwu $rS, $disp($rA)">;
 }
 def ANDIo : DForm_4<28, (ops GPRC:$dst, GPRC:$src1, u16imm:$src2),
-                    "andi. $dst, $src1, $src2">, isDOT;
+                    "andi. $dst, $src1, $src2",
+                    []>, isDOT;
 def ANDISo : DForm_4<29, (ops GPRC:$dst, GPRC:$src1, u16imm:$src2),
-                    "andis. $dst, $src1, $src2">, isDOT;
+                    "andis. $dst, $src1, $src2",
+                    []>, isDOT;
 def ORI   : DForm_4<24, (ops GPRC:$dst, GPRC:$src1, u16imm:$src2),
-                    "ori $dst, $src1, $src2">;
+                    "ori $dst, $src1, $src2",
+                    [(set GPRC:$rD, (or GPRC:$rA, immZExt16:$imm))]>;
 def ORIS  : DForm_4<25, (ops GPRC:$dst, GPRC:$src1, u16imm:$src2),
-                    "oris $dst, $src1, $src2">;
+                    "oris $dst, $src1, $src2",
+                    [(set GPRC:$rD, (or GPRC:$rA, imm16Shifted:$imm))]>;
 def XORI  : DForm_4<26, (ops GPRC:$dst, GPRC:$src1, u16imm:$src2),
-                    "xori $dst, $src1, $src2">;
+                    "xori $dst, $src1, $src2",
+                    [(set GPRC:$rD, (xor GPRC:$rA, immZExt16:$imm))]>;
 def XORIS : DForm_4<27, (ops GPRC:$dst, GPRC:$src1, u16imm:$src2),
-                    "xoris $dst, $src1, $src2">;
+                    "xoris $dst, $src1, $src2",
+                    [(set GPRC:$rD, (xor GPRC:$rA, imm16Shifted:$imm))]>;
 def NOP   : DForm_4_zero<24, (ops), "nop">;
 def CMPI  : DForm_5<11, (ops CRRC:$crD, i1imm:$L, GPRC:$rA, s16imm:$imm),
                     "cmpi $crD, $L, $rA, $imm">;