From: Chris Lattner <sabre@nondot.org>
Date: Tue, 19 Apr 2005 05:41:52 +0000 (+0000)
Subject: Add completely untested support for mtcrf/mfcrf encoding
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=f577c6122f8b51c4e4889f1e1c647ae210c501b8;p=oota-llvm.git

Add completely untested support for mtcrf/mfcrf encoding


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21353 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/PowerPC/PPCCodeEmitter.cpp b/lib/Target/PowerPC/PPCCodeEmitter.cpp
index 57b92b4f161..574e21e7cb5 100644
--- a/lib/Target/PowerPC/PPCCodeEmitter.cpp
+++ b/lib/Target/PowerPC/PPCCodeEmitter.cpp
@@ -186,6 +186,13 @@ int PPC32CodeEmitter::getMachineOpValue(MachineInstr &MI, MachineOperand &MO) {
                   // or things that get fixed up later by the JIT.
   if (MO.isRegister()) {
     rv = enumRegToMachineReg(MO.getReg());
+
+    // Special encoding for MTCRF and MFCRF, which uses a bit mask for the
+    // register, not the register number directly.
+    if ((MI.getOpcode() == PPC::MTCRF || MI.getOpcode() == PPC::MFCRF) &&
+        (MO.getReg() >= PPC::CR0 && MO.getReg() <= PPC::CR7)) {
+      rv = 0x80 >> rv;
+    }
   } else if (MO.isImmediate()) {
     rv = MO.getImmedValue();
   } else if (MO.isGlobalAddress() || MO.isExternalSymbol()) {