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Add more fixed bits to USAT16 encoding to filter out incorrect decodings.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140422 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Owen Anderson 2011-09-23 21:57:50 +00:00
parent 0781c1f700
commit 4a713570b6
1 changed files with 2 additions and 2 deletions
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4
lib/Target/ARM/ARMInstrThumb2.td
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@ -2059,13 +2059,13 @@ def t2USAT16: T2SatI<(outs rGPR:$Rd), (ins imm0_15:$sat_imm, rGPR:$Rn),
NoItinerary,
"usat16", "\t$Rd, $sat_imm, $Rn", []>,
Requires<[IsThumb2, HasThumb2DSP]> {
let Inst{31-27} = 0b11110;
let Inst{25-22} = 0b1110;
let Inst{31-22} = 0b1111001110;
let Inst{20} = 0;
let Inst{15} = 0;
let Inst{21} = 1; // sh = '1'
let Inst{14-12} = 0b000; // imm3 = '000'
let Inst{7-6} = 0b00; // imm2 = '00'
let Inst{5-4} = 0b00;
}
def : T2Pat<(int_arm_ssat GPR:$a, imm:$pos), (t2SSAT imm:$pos, GPR:$a, 0)>;