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Thumb2 POP's don't allow the PC as an operand, and PUSH's don't allow the SP either. 

llvm-svn: 139542
This commit is contained in:
Owen Anderson 2011-09-12 21:28:46 +00:00
parent 973d2921e8
commit 2a206c44b7
2 changed files with 93 additions and 7 deletions
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95
llvm/lib/Target/ARM/ARMInstrThumb2.td
View File

@ -1527,7 +1527,7 @@ defm t2PLI : T2Ipl<0, 1, "pli">, Requires<[IsThumb2,HasV7]>;
// Load / store multiple Instructions.
//
multiclass thumb2_ldst_mult<string asm, InstrItinClass itin,
multiclass thumb2_ld_mult<string asm, InstrItinClass itin,
InstrItinClass itin_upd, bit L_bit> {
def IA :
T2XI<(outs), (ins GPR:$Rn, pred:$p, reglist:$regs, variable_ops),
@ -1542,7 +1542,8 @@ multiclass thumb2_ldst_mult<string asm, InstrItinClass itin,
let Inst{21} = 0; // No writeback
let Inst{20} = L_bit;
let Inst{19-16} = Rn;
let Inst{15-0} = regs;
let Inst{15} = 0;
let Inst{14-0} = regs{14-0};
}
def IA_UPD :
T2XIt<(outs GPR:$wb), (ins GPR:$Rn, pred:$p, reglist:$regs, variable_ops),
@ -1557,7 +1558,8 @@ multiclass thumb2_ldst_mult<string asm, InstrItinClass itin,
let Inst{21} = 1; // Writeback
let Inst{20} = L_bit;
let Inst{19-16} = Rn;
let Inst{15-0} = regs;
let Inst{15} = 0;
let Inst{14-0} = regs{14-0};
}
def DB :
T2XI<(outs), (ins GPR:$Rn, pred:$p, reglist:$regs, variable_ops),
@ -1572,7 +1574,8 @@ multiclass thumb2_ldst_mult<string asm, InstrItinClass itin,
let Inst{21} = 0; // No writeback
let Inst{20} = L_bit;
let Inst{19-16} = Rn;
let Inst{15-0} = regs;
let Inst{15} = 0;
let Inst{14-0} = regs{14-0};
}
def DB_UPD :
T2XIt<(outs GPR:$wb), (ins GPR:$Rn, pred:$p, reglist:$regs, variable_ops),
@ -1587,17 +1590,95 @@ multiclass thumb2_ldst_mult<string asm, InstrItinClass itin,
let Inst{21} = 1; // Writeback
let Inst{20} = L_bit;
let Inst{19-16} = Rn;
let Inst{15-0} = regs;
let Inst{15} = 0;
let Inst{14-0} = regs{14-0};
}
}
let neverHasSideEffects = 1 in {
let mayLoad = 1, hasExtraDefRegAllocReq = 1 in
defm t2LDM : thumb2_ldst_mult<"ldm", IIC_iLoad_m, IIC_iLoad_mu, 1>;
defm t2LDM : thumb2_ld_mult<"ldm", IIC_iLoad_m, IIC_iLoad_mu, 1>;
multiclass thumb2_st_mult<string asm, InstrItinClass itin,
InstrItinClass itin_upd, bit L_bit> {
def IA :
T2XI<(outs), (ins GPR:$Rn, pred:$p, reglist:$regs, variable_ops),
itin, !strconcat(asm, "${p}.w\t$Rn, $regs"), []> {
bits<4> Rn;
bits<16> regs;
let Inst{31-27} = 0b11101;
let Inst{26-25} = 0b00;
let Inst{24-23} = 0b01; // Increment After
let Inst{22} = 0;
let Inst{21} = 0; // No writeback
let Inst{20} = L_bit;
let Inst{19-16} = Rn;
let Inst{15} = 0;
let Inst{14} = regs{14};
let Inst{13} = 0;
let Inst{12-0} = regs{12-0};
}
def IA_UPD :
T2XIt<(outs GPR:$wb), (ins GPR:$Rn, pred:$p, reglist:$regs, variable_ops),
itin_upd, !strconcat(asm, "${p}.w\t$Rn!, $regs"), "$Rn = $wb", []> {
bits<4> Rn;
bits<16> regs;
let Inst{31-27} = 0b11101;
let Inst{26-25} = 0b00;
let Inst{24-23} = 0b01; // Increment After
let Inst{22} = 0;
let Inst{21} = 1; // Writeback
let Inst{20} = L_bit;
let Inst{19-16} = Rn;
let Inst{15} = 0;
let Inst{14} = regs{14};
let Inst{13} = 0;
let Inst{12-0} = regs{12-0};
}
def DB :
T2XI<(outs), (ins GPR:$Rn, pred:$p, reglist:$regs, variable_ops),
itin, !strconcat(asm, "db${p}\t$Rn, $regs"), []> {
bits<4> Rn;
bits<16> regs;
let Inst{31-27} = 0b11101;
let Inst{26-25} = 0b00;
let Inst{24-23} = 0b10; // Decrement Before
let Inst{22} = 0;
let Inst{21} = 0; // No writeback
let Inst{20} = L_bit;
let Inst{19-16} = Rn;
let Inst{15} = 0;
let Inst{14} = regs{14};
let Inst{13} = 0;
let Inst{12-0} = regs{12-0};
}
def DB_UPD :
T2XIt<(outs GPR:$wb), (ins GPR:$Rn, pred:$p, reglist:$regs, variable_ops),
itin_upd, !strconcat(asm, "db${p}\t$Rn!, $regs"), "$Rn = $wb", []> {
bits<4> Rn;
bits<16> regs;
let Inst{31-27} = 0b11101;
let Inst{26-25} = 0b00;
let Inst{24-23} = 0b10; // Decrement Before
let Inst{22} = 0;
let Inst{21} = 1; // Writeback
let Inst{20} = L_bit;
let Inst{19-16} = Rn;
let Inst{15} = 0;
let Inst{14} = regs{14};
let Inst{13} = 0;
let Inst{12-0} = regs{12-0};
}
}
let mayStore = 1, hasExtraSrcRegAllocReq = 1 in
defm t2STM : thumb2_ldst_mult<"stm", IIC_iStore_m, IIC_iStore_mu, 0>;
defm t2STM : thumb2_st_mult<"stm", IIC_iStore_m, IIC_iStore_mu, 0>;
} // neverHasSideEffects

5
llvm/test/MC/Disassembler/ARM/invalid-t2PUSH-thumb.txt Normal file
View File

@ -0,0 +1,5 @@
# RUN: llvm-mc --disassemble %s -triple=thumbv7-apple-darwin9 |& grep {invalid instruction encoding}
# SP and PC are not allowed in the register list on STM instructions in Thumb2.
0x2d 0xe9 0xf7 0xb6