[llvm] r178077 - Restore real bit lengths on PPC register numbers

[Hal Finkel]

Author: hfinkel
Date: Tue Mar 26 16:50:26 2013
New Revision: 178077

URL: http://llvm.org/viewvc/llvm-project?rev=178077&view=rev
Log:
Restore real bit lengths on PPC register numbers

As suggested by Bill Schmidt (in reviewing r178067), use the real register
number bit lengths (which is self-documenting, and prevents using illegal
numbers), and set only the relevant bits in HWEncoding (which defaults to 0).

No functionality change intended.

Modified:
    llvm/trunk/lib/Target/PowerPC/PPCRegisterInfo.td

Modified: llvm/trunk/lib/Target/PowerPC/PPCRegisterInfo.td
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/PowerPC/PPCRegisterInfo.td?rev=178077&r1=178076&r2=178077&view=diff
==============================================================================
--- llvm/trunk/lib/Target/PowerPC/PPCRegisterInfo.td (original)
+++ llvm/trunk/lib/Target/PowerPC/PPCRegisterInfo.td Tue Mar 26 16:50:26 2013
@@ -26,8 +26,8 @@ class PPCReg<string n> : Register<n> {
 // We identify all our registers with a 5-bit ID, for consistency's sake.
 
 // GPR - One of the 32 32-bit general-purpose registers
-class GPR<bits<16> num, string n> : PPCReg<n> {
-  let HWEncoding = num;
+class GPR<bits<5> num, string n> : PPCReg<n> {
+  let HWEncoding{4-0} = num;
 }
 
 // GP8 - One of the 32 64-bit general-purpose registers
@@ -38,29 +38,29 @@ class GP8<GPR SubReg, string n> : PPCReg
 }
 
 // SPR - One of the 32-bit special-purpose registers
-class SPR<bits<16> num, string n> : PPCReg<n> {
-  let HWEncoding = num;
+class SPR<bits<10> num, string n> : PPCReg<n> {
+  let HWEncoding{9-0} = num;
 }
 
 // FPR - One of the 32 64-bit floating-point registers
-class FPR<bits<16> num, string n> : PPCReg<n> {
-  let HWEncoding = num;
+class FPR<bits<5> num, string n> : PPCReg<n> {
+  let HWEncoding{4-0} = num;
 }
 
 // VR - One of the 32 128-bit vector registers
-class VR<bits<16> num, string n> : PPCReg<n> {
-  let HWEncoding = num;
+class VR<bits<5> num, string n> : PPCReg<n> {
+  let HWEncoding{4-0} = num;
 }
 
 // CR - One of the 8 4-bit condition registers
-class CR<bits<16> num, string n, list<Register> subregs> : PPCReg<n> {
-  let HWEncoding = num;
+class CR<bits<3> num, string n, list<Register> subregs> : PPCReg<n> {
+  let HWEncoding{2-0} = num;
   let SubRegs = subregs;
 }
 
 // CRBIT - One of the 32 1-bit condition register fields
-class CRBIT<bits<16> num, string n> : PPCReg<n> {
-  let HWEncoding = num;
+class CRBIT<bits<5> num, string n> : PPCReg<n> {
+  let HWEncoding{4-0} = num;
 }
 
 // General-purpose registers