diff options
Diffstat (limited to 'lib/Target/ARM/ARMInstrThumb2.td')
| -rw-r--r-- | lib/Target/ARM/ARMInstrThumb2.td | 141 |
1 files changed, 139 insertions, 2 deletions
diff --git a/lib/Target/ARM/ARMInstrThumb2.td b/lib/Target/ARM/ARMInstrThumb2.td index 316567d..6241766 100644 --- a/lib/Target/ARM/ARMInstrThumb2.td +++ b/lib/Target/ARM/ARMInstrThumb2.td @@ -131,7 +131,7 @@ def t2addrmode_imm12 : Operand<i32>, let MIOperandInfo = (ops GPR:$base, i32imm:$offsimm); } -// t2addrmode_imm8 := reg - imm8 +// t2addrmode_imm8 := reg +/- imm8 def t2addrmode_imm8 : Operand<i32>, ComplexPattern<i32, 2, "SelectT2AddrModeImm8", []> { let PrintMethod = "printT2AddrModeImm8Operand"; @@ -657,6 +657,32 @@ multiclass T2I_unary_rrot<bits<3> opcod, string opc, PatFrag opnode> { } } +// SXTB16 and UXTB16 do not need the .w qualifier. +multiclass T2I_unary_rrot_nw<bits<3> opcod, string opc, PatFrag opnode> { + def r : T2I<(outs GPR:$dst), (ins GPR:$src), IIC_iUNAr, + opc, "\t$dst, $src", + [(set GPR:$dst, (opnode GPR:$src))]> { + let Inst{31-27} = 0b11111; + let Inst{26-23} = 0b0100; + let Inst{22-20} = opcod; + let Inst{19-16} = 0b1111; // Rn + let Inst{15-12} = 0b1111; + let Inst{7} = 1; + let Inst{5-4} = 0b00; // rotate + } + def r_rot : T2I<(outs GPR:$dst), (ins GPR:$src, i32imm:$rot), IIC_iUNAsi, + opc, "\t$dst, $src, ror $rot", + [(set GPR:$dst, (opnode (rotr GPR:$src, rot_imm:$rot)))]> { + let Inst{31-27} = 0b11111; + let Inst{26-23} = 0b0100; + let Inst{22-20} = opcod; + let Inst{19-16} = 0b1111; // Rn + let Inst{15-12} = 0b1111; + let Inst{7} = 1; + let Inst{5-4} = {?,?}; // rotate + } +} + // DO variant - disassembly only, no pattern multiclass T2I_unary_rrot_DO<bits<3> opcod, string opc> { @@ -983,6 +1009,28 @@ def t2LDRSH_POST : T2Iidxldst<1, 0b01, 1, 0, (outs GPR:$dst, GPR:$base_wb), []>; } +// LDRT, LDRBT, LDRHT, LDRSBT, LDRSHT all have offset mode (PUW=0b110) and are +// for disassembly only. +// Ref: A8.6.57 LDR (immediate, Thumb) Encoding T4 +class T2IldT<bit signed, bits<2> type, string opc> + : T2Ii8<(outs GPR:$dst), (ins t2addrmode_imm8:$addr), IIC_iLoadi, opc, + "\t$dst, $addr", []> { + let Inst{31-27} = 0b11111; + let Inst{26-25} = 0b00; + let Inst{24} = signed; + let Inst{23} = 0; + let Inst{22-21} = type; + let Inst{20} = 1; // load + let Inst{11} = 1; + let Inst{10-8} = 0b110; // PUW. +} + +def t2LDRT : T2IldT<0, 0b10, "ldrt">; +def t2LDRBT : T2IldT<0, 0b00, "ldrbt">; +def t2LDRHT : T2IldT<0, 0b01, "ldrht">; +def t2LDRSBT : T2IldT<1, 0b00, "ldrsbt">; +def t2LDRSHT : T2IldT<1, 0b01, "ldrsht">; + // Store defm t2STR :T2I_st<0b10,"str", BinOpFrag<(store node:$LHS, node:$RHS)>>; defm t2STRB:T2I_st<0b00,"strb",BinOpFrag<(truncstorei8 node:$LHS, node:$RHS)>>; @@ -1037,9 +1085,98 @@ def t2STRB_POST : T2Iidxldst<0, 0b00, 0, 0, (outs GPR:$base_wb), [(set GPR:$base_wb, (post_truncsti8 GPR:$src, GPR:$base, t2am_imm8_offset:$offset))]>; +// STRT, STRBT, STRHT all have offset mode (PUW=0b110) and are for disassembly +// only. +// Ref: A8.6.193 STR (immediate, Thumb) Encoding T4 +class T2IstT<bits<2> type, string opc> + : T2Ii8<(outs GPR:$src), (ins t2addrmode_imm8:$addr), IIC_iStorei, opc, + "\t$src, $addr", []> { + let Inst{31-27} = 0b11111; + let Inst{26-25} = 0b00; + let Inst{24} = 0; // not signed + let Inst{23} = 0; + let Inst{22-21} = type; + let Inst{20} = 0; // store + let Inst{11} = 1; + let Inst{10-8} = 0b110; // PUW +} + +def t2STRT : T2IstT<0b10, "strt">; +def t2STRBT : T2IstT<0b00, "strbt">; +def t2STRHT : T2IstT<0b01, "strht">; // FIXME: ldrd / strd pre / post variants +// T2Ipl (Preload Data/Instruction) signals the memory system of possible future +// data/instruction access. These are for disassembly only. +multiclass T2Ipl<bit instr, bit write, string opc> { + + def i12 : T2I<(outs), (ins t2addrmode_imm12:$addr), IIC_iLoadi, opc, + "\t$addr", []> { + let Inst{31-25} = 0b1111100; + let Inst{24} = instr; + let Inst{23} = 1; // U = 1 + let Inst{22} = 0; + let Inst{21} = write; + let Inst{20} = 1; + let Inst{15-12} = 0b1111; + } + + def i8 : T2I<(outs), (ins t2addrmode_imm8:$addr), IIC_iLoadi, opc, + "\t$addr", []> { + let Inst{31-25} = 0b1111100; + let Inst{24} = instr; + let Inst{23} = 0; // U = 0 + let Inst{22} = 0; + let Inst{21} = write; + let Inst{20} = 1; + let Inst{15-12} = 0b1111; + let Inst{11-8} = 0b1100; + } + + // A8.6.118 #0 and #-0 differs. Translates -0 to -1, -1 to -2, ..., etc. + def pci : T2I<(outs), (ins GPR:$base, i32imm:$imm), IIC_iLoadi, opc, + "\t[pc, ${imm:negzero}]", []> { + let Inst{31-25} = 0b1111100; + let Inst{24} = instr; + let Inst{23} = ?; // add = (U == 1) + let Inst{22} = 0; + let Inst{21} = write; + let Inst{20} = 1; + let Inst{19-16} = 0b1111; // Rn = 0b1111 + let Inst{15-12} = 0b1111; + } + + def r : T2I<(outs), (ins GPR:$base, GPR:$a), IIC_iLoadi, opc, + "\t[$base, $a]", []> { + let Inst{31-25} = 0b1111100; + let Inst{24} = instr; + let Inst{23} = 0; // add = TRUE for T1 + let Inst{22} = 0; + let Inst{21} = write; + let Inst{20} = 1; + let Inst{15-12} = 0b1111; + let Inst{11-6} = 0000000; + let Inst{5-4} = 0b00; // no shift is applied + } + + def s : T2I<(outs), (ins GPR:$base, GPR:$a, i32imm:$shamt), IIC_iLoadi, opc, + "\t[$base, $a, lsl $shamt]", []> { + let Inst{31-25} = 0b1111100; + let Inst{24} = instr; + let Inst{23} = 0; // add = TRUE for T1 + let Inst{22} = 0; + let Inst{21} = write; + let Inst{20} = 1; + let Inst{15-12} = 0b1111; + let Inst{11-6} = 0000000; + } +} + +defm t2PLD : T2Ipl<0, 0, "pld">; +defm t2PLDW : T2Ipl<0, 1, "pldw">; +defm t2PLI : T2Ipl<1, 0, "pli">; + //===----------------------------------------------------------------------===// // Load / store multiple Instructions. // @@ -1149,7 +1286,7 @@ defm t2UXTB : T2I_unary_rrot<0b101, "uxtb", UnOpFrag<(and node:$Src, 0x000000FF)>>; defm t2UXTH : T2I_unary_rrot<0b001, "uxth", UnOpFrag<(and node:$Src, 0x0000FFFF)>>; -defm t2UXTB16 : T2I_unary_rrot<0b011, "uxtb16", +defm t2UXTB16 : T2I_unary_rrot_nw<0b011, "uxtb16", UnOpFrag<(and node:$Src, 0x00FF00FF)>>; def : T2Pat<(and (shl GPR:$Src, (i32 8)), 0xFF00FF), |
