| //=- WebAssemblyInstrFormats.td - WebAssembly Instr. Formats -*- tablegen -*-=// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| /// |
| /// \file |
| /// WebAssembly instruction format definitions. |
| /// |
| //===----------------------------------------------------------------------===// |
| |
| // WebAssembly Instruction Format. |
| // We instantiate 2 of these for every actual instruction (register based |
| // and stack based), see below. |
| class WebAssemblyInst<bits<32> inst, string asmstr, bit stack> : Instruction { |
| field bits<32> Inst = inst; // Instruction encoding. |
| field bit StackBased = stack; |
| let Namespace = "WebAssembly"; |
| let Pattern = []; |
| let AsmString = asmstr; |
| } |
| |
| // Normal instructions. Default instantiation of a WebAssemblyInst. |
| class NI<dag oops, dag iops, list<dag> pattern, bit stack, string asmstr = "", |
| bits<32> inst = -1> |
| : WebAssemblyInst<inst, asmstr, stack> { |
| dag OutOperandList = oops; |
| dag InOperandList = iops; |
| let Pattern = pattern; |
| } |
| |
| // Generates both register and stack based versions of one actual instruction. |
| // We have 2 sets of operands (oops & iops) for the register and stack |
| // based version of this instruction, as well as the corresponding asmstr. |
| // The register versions have virtual-register operands which correspond to wasm |
| // locals or stack locations. Each use and def of the register corresponds to an |
| // implicit get_local / set_local or access of stack operands in wasm. These |
| // instructions are used for ISel and all MI passes. The stack versions of the |
| // instructions do not have register operands (they implicitly operate on the |
| // stack), and get_locals and set_locals are explicit. The register instructions |
| // are converted to their corresponding stack instructions before lowering to |
| // MC. |
| // Every instruction should want to be based on this multi-class to guarantee |
| // there is always an equivalent pair of instructions. |
| multiclass I<dag oops_r, dag iops_r, dag oops_s, dag iops_s, |
| list<dag> pattern_r, string asmstr_r = "", string asmstr_s = "", |
| bits<32> inst = -1> { |
| def "" : NI<oops_r, iops_r, pattern_r, 0, asmstr_r, inst>; |
| def _S : NI<oops_s, iops_s, [], 1, asmstr_s, inst>; |
| } |
| |
| // For instructions that have no register ops, so both sets are the same. |
| multiclass NRI<dag oops, dag iops, list<dag> pattern, string asmstr = "", |
| bits<32> inst = -1> { |
| defm "": I<oops, iops, oops, iops, pattern, asmstr, asmstr, inst>; |
| } |
| |
| // Instructions requiring HasSIMD128 and the simd128 prefix byte |
| multiclass SIMD_I<dag oops_r, dag iops_r, dag oops_s, dag iops_s, |
| list<dag> pattern_r, string asmstr_r = "", |
| string asmstr_s = "", bits<32> simdop = -1> { |
| defm "" : I<oops_r, iops_r, oops_s, iops_s, pattern_r, asmstr_r, asmstr_s, |
| !or(0xfd00, !and(0xff, simdop))>, |
| Requires<[HasSIMD128]>; |
| } |