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Added support for handling unpredictable arithmetic instructions on ARM. 

llvm-svn: 154100
This commit is contained in:
Silviu Baranga 2012-04-05 16:13:15 +00:00
parent 7fdf9ef15d
commit d365397daa
3 changed files with 9 additions and 12 deletions
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2
llvm/lib/Target/ARM/ARMInstrInfo.td
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@ -3244,6 +3244,8 @@ class AAI<bits<8> op27_20, bits<8> op11_4, string opc,
let Inst{19-16} = Rn; let Inst{19-16} = Rn;
let Inst{15-12} = Rd; let Inst{15-12} = Rd;
let Inst{3-0} = Rm; let Inst{3-0} = Rm;
let Unpredictable{11-8} = 0b1111;
} }
// Saturating add/subtract // Saturating add/subtract

12
llvm/test/MC/Disassembler/ARM/invalid-LDRT-arm.txt
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@ -1,12 +0,0 @@
# RUN: llvm-mc --disassemble %s -triple=arm-apple-darwin9 |& grep {invalid instruction encoding}
# Opcode=0 Name=PHI Format=(42)
# 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
# -------------------------------------------------------------------------------------------------
# | 1: 1: 1: 0| 0: 1: 1: 0| 0: 0: 1: 1| 0: 1: 1: 1| 0: 1: 0: 1| 0: 0: 0: 1| 0: 0: 0: 1| 0: 0: 0: 0|
# -------------------------------------------------------------------------------------------------
#
# The bytes have Inst{4} = 1, so it's not an LDRT Encoding A2 instruction.
0x10 0x51 0x37 0xe6

7
llvm/test/MC/Disassembler/ARM/unpredictable-SHADD16-arm.txt Normal file
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@ -0,0 +1,7 @@
# RUN: llvm-mc --disassemble %s -triple=arm-apple-darwin9 |& FileCheck %s
# CHECK: warning: potentially undefined
# CHECK: shadd16 r5, r7, r0
0x10 0x51 0x37 0xe6