[llvm-commits] [llvm] r132179 - in /llvm/trunk/lib/Target/ARM: ARMInstrFormats.td ARMInstrThumb.td

[Eric Christopher]

Author: echristo
Date: Thu May 26 22:50:53 2011
New Revision: 132179

URL: http://llvm.org/viewvc/llvm-project?rev=132179&view=rev
Log:
Make the branch encoding for tBcc more obvious that it's a 4-byte opcode
followed by a conditional and imm8.

Modified:
    llvm/trunk/lib/Target/ARM/ARMInstrFormats.td
    llvm/trunk/lib/Target/ARM/ARMInstrThumb.td

Modified: llvm/trunk/lib/Target/ARM/ARMInstrFormats.td
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/ARM/ARMInstrFormats.td?rev=132179&r1=132178&r2=132179&view=diff
==============================================================================
--- llvm/trunk/lib/Target/ARM/ARMInstrFormats.td (original)
+++ llvm/trunk/lib/Target/ARM/ARMInstrFormats.td Thu May 26 22:50:53 2011
@@ -1023,6 +1023,10 @@
 }
 class T1LdStSP<bits<3> opB>   : T1LoadStore<0b1001, opB>; // SP relative
 
+class T1BranchCond<bits<4> opcode> : Encoding16 {
+  let Inst{15-12} = opcode;
+}
+
 // Helper classes to encode Thumb1 loads and stores. For immediates, the
 // following bits are used for "opA" (see A6.2.4):
 //

Modified: llvm/trunk/lib/Target/ARM/ARMInstrThumb.td
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/ARM/ARMInstrThumb.td?rev=132179&r1=132178&r2=132179&view=diff
==============================================================================
--- llvm/trunk/lib/Target/ARM/ARMInstrThumb.td (original)
+++ llvm/trunk/lib/Target/ARM/ARMInstrThumb.td Thu May 26 22:50:53 2011
@@ -551,7 +551,7 @@
   def tBcc : T1I<(outs), (ins t_bcctarget:$target, pred:$p), IIC_Br,
                  "b${p}\t$target",
                  [/*(ARMbrcond bb:$target, imm:$cc)*/]>,
-             T1Encoding<{1,1,0,1,?,?}> {
+             T1BranchCond<{1,1,0,1}> {
   bits<4> p;
   bits<8> target;
   let Inst{11-8} = p;