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Add ARM encoding information for LDRH post-increment.

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llvm-svn: 119743
This commit is contained in:
Jim Grosbach 2010-11-18 21:43:37 +00:00
parent a9561a6257
commit 0651dc456a
1 changed files with 13 additions and 7 deletions
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20
lib/Target/ARM/ARMInstrFormats.td
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@ -684,14 +684,20 @@ class AI3ldhpo<dag oops, dag iops, Format f, InstrItinClass itin,
string opc, string asm, string cstr, list<dag> pattern>
: I<oops, iops, AddrMode3, Size4Bytes, IndexModePost, f, itin,
opc, asm, cstr,pattern> {
let Inst{4} = 1;
let Inst{5} = 1; // H bit
let Inst{6} = 0; // S bit
let Inst{7} = 1;
let Inst{20} = 1; // L bit
let Inst{21} = 0; // W bit
let Inst{24} = 0; // P bit
bits<10> offset;
bits<4> Rt;
bits<4> Rn;
let Inst{27-25} = 0b000;
let Inst{24} = 0; // P bit
let Inst{23} = offset{8}; // U bit
let Inst{22} = offset{9}; // 1 == imm8, 0 == Rm
let Inst{21} = 0; // W bit
let Inst{20} = 1; // L bit
let Inst{19-16} = Rn; // Rn
let Inst{15-12} = Rt; // Rt
let Inst{11-8} = offset{7-4}; // imm7_4/zero
let Inst{7-4} = 0b1011;
let Inst{3-0} = offset{3-0}; // imm3_0/Rm
}
class AI3ldshpo<dag oops, dag iops, Format f, InstrItinClass itin,
string opc, string asm, string cstr, list<dag> pattern>