llvm-project/llvm/lib/Target/AMDGPU/SIInstrFormats.td

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TableGen

//===-- SIInstrFormats.td - SI Instruction Encodings ----------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// SI Instruction format definitions.
//
//===----------------------------------------------------------------------===//
class InstSI <dag outs, dag ins, string asm = "",
list<dag> pattern = []> :
AMDGPUInst<outs, ins, asm, pattern>, PredicateControl {
// Low bits - basic encoding information.
field bit SALU = 0;
field bit VALU = 0;
// SALU instruction formats.
field bit SOP1 = 0;
field bit SOP2 = 0;
field bit SOPC = 0;
field bit SOPK = 0;
field bit SOPP = 0;
// VALU instruction formats.
field bit VOP1 = 0;
field bit VOP2 = 0;
field bit VOPC = 0;
field bit VOP3 = 0;
field bit VOP3P = 0;
field bit VINTRP = 0;
field bit SDWA = 0;
field bit DPP = 0;
// Memory instruction formats.
field bit MUBUF = 0;
field bit MTBUF = 0;
field bit SMRD = 0;
field bit MIMG = 0;
field bit EXP = 0;
field bit FLAT = 0;
field bit DS = 0;
// Pseudo instruction formats.
field bit VGPRSpill = 0;
field bit SGPRSpill = 0;
// High bits - other information.
field bit VM_CNT = 0;
field bit EXP_CNT = 0;
field bit LGKM_CNT = 0;
// Whether WQM _must_ be enabled for this instruction.
field bit WQM = 0;
// Whether WQM _must_ be disabled for this instruction.
field bit DisableWQM = 0;
field bit Gather4 = 0;
// Most sopk treat the immediate as a signed 16-bit, however some
// use it as unsigned.
field bit SOPKZext = 0;
// This is an s_store_dword* instruction that requires a cache flush
// on wave termination. It is necessary to distinguish from mayStore
// SMEM instructions like the cache flush ones.
field bit ScalarStore = 0;
// Whether the operands can be ignored when computing the
// instruction size.
field bit FixedSize = 0;
// This bit tells the assembler to use the 32-bit encoding in case it
// is unable to infer the encoding from the operands.
field bit VOPAsmPrefer32Bit = 0;
// This bit indicates that this has a floating point result type, so
// the clamp modifier has floating point semantics.
field bit FPClamp = 0;
// These need to be kept in sync with the enum in SIInstrFlags.
let TSFlags{0} = SALU;
let TSFlags{1} = VALU;
let TSFlags{2} = SOP1;
let TSFlags{3} = SOP2;
let TSFlags{4} = SOPC;
let TSFlags{5} = SOPK;
let TSFlags{6} = SOPP;
let TSFlags{7} = VOP1;
let TSFlags{8} = VOP2;
let TSFlags{9} = VOPC;
let TSFlags{10} = VOP3;
let TSFlags{12} = VOP3P;
let TSFlags{13} = VINTRP;
let TSFlags{14} = SDWA;
let TSFlags{15} = DPP;
let TSFlags{16} = MUBUF;
let TSFlags{17} = MTBUF;
let TSFlags{18} = SMRD;
let TSFlags{19} = MIMG;
let TSFlags{20} = EXP;
let TSFlags{21} = FLAT;
let TSFlags{22} = DS;
let TSFlags{23} = VGPRSpill;
let TSFlags{24} = SGPRSpill;
let TSFlags{32} = VM_CNT;
let TSFlags{33} = EXP_CNT;
let TSFlags{34} = LGKM_CNT;
let TSFlags{35} = WQM;
let TSFlags{36} = DisableWQM;
let TSFlags{37} = Gather4;
let TSFlags{38} = SOPKZext;
let TSFlags{39} = ScalarStore;
let TSFlags{40} = FixedSize;
let TSFlags{41} = VOPAsmPrefer32Bit;
let TSFlags{42} = FPClamp;
let SchedRW = [Write32Bit];
field bits<1> DisableSIDecoder = 0;
field bits<1> DisableVIDecoder = 0;
field bits<1> DisableDecoder = 0;
let isAsmParserOnly = !if(!eq(DisableDecoder{0}, {0}), 0, 1);
let AsmVariantName = AMDGPUAsmVariants.Default;
}
class PseudoInstSI<dag outs, dag ins, list<dag> pattern = [], string asm = "">
: InstSI<outs, ins, asm, pattern> {
let isPseudo = 1;
let isCodeGenOnly = 1;
}
class SPseudoInstSI<dag outs, dag ins, list<dag> pattern = [], string asm = "">
: PseudoInstSI<outs, ins, pattern, asm> {
let SALU = 1;
}
class VPseudoInstSI<dag outs, dag ins, list<dag> pattern = [], string asm = "">
: PseudoInstSI<outs, ins, pattern, asm> {
let VALU = 1;
let Uses = [EXEC];
}
class CFPseudoInstSI<dag outs, dag ins, list<dag> pattern = [],
bit UseExec = 0, bit DefExec = 0> :
SPseudoInstSI<outs, ins, pattern> {
let Uses = !if(UseExec, [EXEC], []);
let Defs = !if(DefExec, [EXEC, SCC], [SCC]);
let mayLoad = 0;
let mayStore = 0;
let hasSideEffects = 0;
}
class Enc32 {
field bits<32> Inst;
int Size = 4;
}
class Enc64 {
field bits<64> Inst;
int Size = 8;
}
class VOPDstOperand <RegisterClass rc> : RegisterOperand <rc, "printVOPDst">;
class VINTRPe <bits<2> op> : Enc32 {
bits<8> vdst;
bits<8> vsrc;
bits<2> attrchan;
bits<6> attr;
let Inst{7-0} = vsrc;
let Inst{9-8} = attrchan;
let Inst{15-10} = attr;
let Inst{17-16} = op;
let Inst{25-18} = vdst;
let Inst{31-26} = 0x32; // encoding
}
class MIMGe <bits<7> op> : Enc64 {
bits<8> vdata;
bits<4> dmask;
bits<1> unorm;
bits<1> glc;
bits<1> da;
bits<1> r128;
bits<1> tfe;
bits<1> lwe;
bits<1> slc;
bits<8> vaddr;
bits<7> srsrc;
bits<7> ssamp;
let Inst{11-8} = dmask;
let Inst{12} = unorm;
let Inst{13} = glc;
let Inst{14} = da;
let Inst{15} = r128;
let Inst{16} = tfe;
let Inst{17} = lwe;
let Inst{24-18} = op;
let Inst{25} = slc;
let Inst{31-26} = 0x3c;
let Inst{39-32} = vaddr;
let Inst{47-40} = vdata;
let Inst{52-48} = srsrc{6-2};
let Inst{57-53} = ssamp{6-2};
}
class EXPe : Enc64 {
bits<4> en;
bits<6> tgt;
bits<1> compr;
bits<1> done;
bits<1> vm;
bits<8> src0;
bits<8> src1;
bits<8> src2;
bits<8> src3;
let Inst{3-0} = en;
let Inst{9-4} = tgt;
let Inst{10} = compr;
let Inst{11} = done;
let Inst{12} = vm;
let Inst{31-26} = 0x3e;
let Inst{39-32} = src0;
let Inst{47-40} = src1;
let Inst{55-48} = src2;
let Inst{63-56} = src3;
}
let Uses = [EXEC] in {
class VINTRPCommon <dag outs, dag ins, string asm, list<dag> pattern> :
InstSI <outs, ins, asm, pattern> {
let VINTRP = 1;
// VINTRP instructions read parameter values from LDS, but these parameter
// values are stored outside of the LDS memory that is allocated to the
// shader for general purpose use.
//
// While it may be possible for ds_read/ds_write instructions to access
// the parameter values in LDS, this would essentially be an out-of-bounds
// memory access which we consider to be undefined behavior.
//
// So even though these instructions read memory, this memory is outside the
// addressable memory space for the shader, and we consider these instructions
// to be readnone.
let mayLoad = 0;
let mayStore = 0;
let hasSideEffects = 0;
}
class EXPCommon<dag outs, dag ins, string asm, list<dag> pattern> :
InstSI<outs, ins, asm, pattern> {
let EXP = 1;
let EXP_CNT = 1;
let mayLoad = 0; // Set to 1 if done bit is set.
let mayStore = 1;
let UseNamedOperandTable = 1;
let Uses = [EXEC];
let SchedRW = [WriteExport];
}
} // End Uses = [EXEC]
class MIMG <dag outs, dag ins, string asm, list<dag> pattern> :
InstSI <outs, ins, asm, pattern> {
let VM_CNT = 1;
let EXP_CNT = 1;
let MIMG = 1;
let Uses = [EXEC];
let UseNamedOperandTable = 1;
let hasSideEffects = 0; // XXX ????
}