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-rw-r--r--lib/Target/ARM/ARMInstrFormats.td110
1 files changed, 94 insertions, 16 deletions
diff --git a/lib/Target/ARM/ARMInstrFormats.td b/lib/Target/ARM/ARMInstrFormats.td
index cf0edff..e54ac61 100644
--- a/lib/Target/ARM/ARMInstrFormats.td
+++ b/lib/Target/ARM/ARMInstrFormats.td
@@ -146,11 +146,9 @@ def s_cc_out : OptionalDefOperand<OtherVT, (ops CCR), (ops (i32 CPSR))> {
// ARM Instruction templates.
//
-class InstARM<AddrMode am, SizeFlagVal sz, IndexMode im,
- Format f, Domain d, string cstr, InstrItinClass itin>
+class InstTemplate<AddrMode am, SizeFlagVal sz, IndexMode im,
+ Format f, Domain d, string cstr, InstrItinClass itin>
: Instruction {
- field bits<32> Inst;
-
let Namespace = "ARM";
// TSFlagsFields
@@ -179,6 +177,20 @@ class InstARM<AddrMode am, SizeFlagVal sz, IndexMode im,
let Itinerary = itin;
}
+class Encoding {
+ field bits<32> Inst;
+}
+
+class InstARM<AddrMode am, SizeFlagVal sz, IndexMode im,
+ Format f, Domain d, string cstr, InstrItinClass itin>
+ : InstTemplate<am, sz, im, f, d, cstr, itin>, Encoding;
+
+// This Encoding-less class is used by Thumb1 to specify the encoding bits later
+// on by adding flavors to specific instructions.
+class InstThumb<AddrMode am, SizeFlagVal sz, IndexMode im,
+ Format f, Domain d, string cstr, InstrItinClass itin>
+ : InstTemplate<am, sz, im, f, d, cstr, itin>;
+
class PseudoInst<dag oops, dag iops, InstrItinClass itin,
string asm, list<dag> pattern>
: InstARM<AddrModeNone, SizeSpecial, IndexModeNone, Pseudo, GenericDomain,
@@ -861,7 +873,7 @@ class ARMV6Pat<dag pattern, dag result> : Pat<pattern, result> {
class ThumbI<dag oops, dag iops, AddrMode am, SizeFlagVal sz,
InstrItinClass itin, string asm, string cstr, list<dag> pattern>
- : InstARM<am, sz, IndexModeNone, ThumbFrm, GenericDomain, cstr, itin> {
+ : InstThumb<am, sz, IndexModeNone, ThumbFrm, GenericDomain, cstr, itin> {
let OutOperandList = oops;
let InOperandList = iops;
let AsmString = asm;
@@ -876,9 +888,14 @@ class TI<dag oops, dag iops, InstrItinClass itin, string asm, list<dag> pattern>
class TIt<dag oops, dag iops, InstrItinClass itin, string asm, list<dag> pattern>
: ThumbI<oops, iops, AddrModeNone, Size2Bytes, itin, asm, "$lhs = $dst", pattern>;
-// tBL, tBX instructions
-class TIx2<dag oops, dag iops, InstrItinClass itin, string asm, list<dag> pattern>
- : ThumbI<oops, iops, AddrModeNone, Size4Bytes, itin, asm, "", pattern>;
+// tBL, tBX 32-bit instructions
+class TIx2<bits<5> opcod1, bits<2> opcod2, bit opcod3,
+ dag oops, dag iops, InstrItinClass itin, string asm, list<dag> pattern>
+ : ThumbI<oops, iops, AddrModeNone, Size4Bytes, itin, asm, "", pattern>, Encoding {
+ let Inst{31-27} = opcod1;
+ let Inst{15-14} = opcod2;
+ let Inst{12} = opcod3;
+}
// BR_JT instructions
class TJTI<dag oops, dag iops, InstrItinClass itin, string asm, list<dag> pattern>
@@ -887,7 +904,7 @@ class TJTI<dag oops, dag iops, InstrItinClass itin, string asm, list<dag> patter
// Thumb1 only
class Thumb1I<dag oops, dag iops, AddrMode am, SizeFlagVal sz,
InstrItinClass itin, string asm, string cstr, list<dag> pattern>
- : InstARM<am, sz, IndexModeNone, ThumbFrm, GenericDomain, cstr, itin> {
+ : InstThumb<am, sz, IndexModeNone, ThumbFrm, GenericDomain, cstr, itin> {
let OutOperandList = oops;
let InOperandList = iops;
let AsmString = asm;
@@ -903,7 +920,8 @@ class T1Ix2<dag oops, dag iops, InstrItinClass itin,
: Thumb1I<oops, iops, AddrModeNone, Size4Bytes, itin, asm, "", pattern>;
class T1JTI<dag oops, dag iops, InstrItinClass itin,
string asm, list<dag> pattern>
- : Thumb1I<oops, iops, AddrModeNone, SizeSpecial, itin, asm, "", pattern>;
+ : Thumb1I<oops, iops, AddrModeNone, SizeSpecial, itin, asm, "", pattern>,
+ Encoding;
// Two-address instructions
class T1It<dag oops, dag iops, InstrItinClass itin,
@@ -915,7 +933,7 @@ class T1It<dag oops, dag iops, InstrItinClass itin,
class Thumb1sI<dag oops, dag iops, AddrMode am, SizeFlagVal sz,
InstrItinClass itin,
string opc, string asm, string cstr, list<dag> pattern>
- : InstARM<am, sz, IndexModeNone, ThumbFrm, GenericDomain, cstr, itin> {
+ : InstThumb<am, sz, IndexModeNone, ThumbFrm, GenericDomain, cstr, itin> {
let OutOperandList = !con(oops, (ops s_cc_out:$s));
let InOperandList = !con(iops, (ops pred:$p));
let AsmString = !strconcat(opc, !strconcat("${s}${p}", asm));
@@ -937,7 +955,7 @@ class T1sIt<dag oops, dag iops, InstrItinClass itin,
class Thumb1pI<dag oops, dag iops, AddrMode am, SizeFlagVal sz,
InstrItinClass itin,
string opc, string asm, string cstr, list<dag> pattern>
- : InstARM<am, sz, IndexModeNone, ThumbFrm, GenericDomain, cstr, itin> {
+ : InstThumb<am, sz, IndexModeNone, ThumbFrm, GenericDomain, cstr, itin> {
let OutOperandList = oops;
let InOperandList = !con(iops, (ops pred:$p));
let AsmString = !strconcat(opc, !strconcat("${p}", asm));
@@ -968,6 +986,46 @@ class T1pIs<dag oops, dag iops,
InstrItinClass itin, string opc, string asm, list<dag> pattern>
: Thumb1pI<oops, iops, AddrModeT1_s, Size2Bytes, itin, opc, asm, "", pattern>;
+// A6.2 16-bit Thumb instruction encoding
+class T1Encoding<bits<6> opcode> : Encoding {
+ let Inst{15-10} = opcode;
+}
+
+// A6.2.1 Shift (immediate), add, subtract, move, and compare encoding.
+class T1General<bits<5> opcode> : Encoding {
+ let Inst{15-14} = 0b00;
+ let Inst{13-9} = opcode;
+}
+
+// A6.2.2 Data-processing encoding.
+class T1DataProcessing<bits<4> opcode> : Encoding {
+ let Inst{15-10} = 0b010000;
+ let Inst{9-6} = opcode;
+}
+
+// A6.2.3 Special data instructions and branch and exchange encoding.
+class T1Special<bits<4> opcode> : Encoding {
+ let Inst{15-10} = 0b010001;
+ let Inst{9-6} = opcode;
+}
+
+// A6.2.4 Load/store single data item encoding.
+class T1LoadStore<bits<4> opA, bits<3> opB> : Encoding {
+ let Inst{15-12} = opA;
+ let Inst{11-9} = opB;
+}
+class T1LdSt<bits<3> opB> : T1LoadStore<0b0101, opB>;
+class T1LdSt4Imm<bits<3> opB> : T1LoadStore<0b0110, opB>; // Immediate, 4 bytes
+class T1LdSt1Imm<bits<3> opB> : T1LoadStore<0b0111, opB>; // Immediate, 1 byte
+class T1LdSt2Imm<bits<3> opB> : T1LoadStore<0b1000, opB>; // Immediate, 2 bytes
+class T1LdStSP<bits<3> opB> : T1LoadStore<0b1001, opB>; // SP relative
+
+// A6.2.5 Miscellaneous 16-bit instructions encoding.
+class T1Misc<bits<7> opcode> : Encoding {
+ let Inst{15-12} = 0b1011;
+ let Inst{11-5} = opcode;
+}
+
// Thumb2I - Thumb2 instruction. Almost all Thumb2 instructions are predicable.
class Thumb2I<dag oops, dag iops, AddrMode am, SizeFlagVal sz,
InstrItinClass itin,
@@ -1034,9 +1092,18 @@ class T2Iso<dag oops, dag iops, InstrItinClass itin,
class T2Ipc<dag oops, dag iops, InstrItinClass itin,
string opc, string asm, list<dag> pattern>
: Thumb2I<oops, iops, AddrModeT2_pc, Size4Bytes, itin, opc, asm, "", pattern>;
-class T2Ii8s4<dag oops, dag iops, InstrItinClass itin,
+class T2Ii8s4<bit P, bit W, bit load, dag oops, dag iops, InstrItinClass itin,
string opc, string asm, list<dag> pattern>
- : Thumb2I<oops, iops, AddrModeT2_i8s4, Size4Bytes, itin, opc, asm, "", pattern>;
+ : Thumb2I<oops, iops, AddrModeT2_i8s4, Size4Bytes, itin, opc, asm, "",
+ pattern> {
+ let Inst{31-27} = 0b11101;
+ let Inst{26-25} = 0b00;
+ let Inst{24} = P;
+ let Inst{23} = ?; // The U bit.
+ let Inst{22} = 1;
+ let Inst{21} = W;
+ let Inst{20} = load;
+}
class T2sI<dag oops, dag iops, InstrItinClass itin,
string opc, string asm, list<dag> pattern>
@@ -1055,8 +1122,9 @@ class T2Ix2<dag oops, dag iops, InstrItinClass itin,
// T2Iidxldst - Thumb2 indexed load / store instructions.
-class T2Iidxldst<dag oops, dag iops, AddrMode am, IndexMode im,
- InstrItinClass itin,
+class T2Iidxldst<bit signed, bits<2> opcod, bit load, bit pre,
+ dag oops, dag iops,
+ AddrMode am, IndexMode im, InstrItinClass itin,
string opc, string asm, string cstr, list<dag> pattern>
: InstARM<am, Size4Bytes, im, ThumbFrm, GenericDomain, cstr, itin> {
let OutOperandList = oops;
@@ -1064,6 +1132,16 @@ class T2Iidxldst<dag oops, dag iops, AddrMode am, IndexMode im,
let AsmString = !strconcat(opc, !strconcat("${p}", asm));
let Pattern = pattern;
list<Predicate> Predicates = [IsThumb2];
+ let Inst{31-27} = 0b11111;
+ let Inst{26-25} = 0b00;
+ let Inst{24} = signed;
+ let Inst{23} = 0;
+ let Inst{22-21} = opcod;
+ let Inst{20} = load;
+ let Inst{11} = 1;
+ // (P, W) = (1, 1) Pre-indexed or (0, 1) Post-indexed
+ let Inst{10} = pre; // The P bit.
+ let Inst{8} = 1; // The W bit.
}
// Tv5Pat - Same as Pat<>, but requires V5T Thumb mode.
generated by cgit v1.1 at 2025-08-15 10:10:51 +0000