1//WebAssemblyRegisterInfo.td-Describe the WebAssembly Registers -*- tablegen -*- 2// 3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4// See https://llvm.org/LICENSE.txt for license information. 5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6// 7//===----------------------------------------------------------------------===// 8/// 9/// \file 10/// This file describes the WebAssembly register classes and some nominal 11/// physical registers. 12/// 13//===----------------------------------------------------------------------===// 14 15class WebAssemblyReg<string n> : Register<n> { 16 let Namespace = "WebAssembly"; 17} 18 19class WebAssemblyRegClass<list<ValueType> regTypes, int alignment, dag regList> 20 : RegisterClass<"WebAssembly", regTypes, alignment, regList>; 21 22//===----------------------------------------------------------------------===// 23// Registers 24//===----------------------------------------------------------------------===// 25 26// Special registers used as the frame and stack pointer. 27// 28// WebAssembly may someday supports mixed 32-bit and 64-bit heaps in the same 29// application, which requires separate width FP and SP. 30def FP32 : WebAssemblyReg<"%FP32">; 31def FP64 : WebAssemblyReg<"%FP64">; 32def SP32 : WebAssemblyReg<"%SP32">; 33def SP64 : WebAssemblyReg<"%SP64">; 34 35// The register allocation framework requires register classes have at least 36// one register, so we define a few for the integer / floating point register 37// classes since we otherwise don't need a physical register in those classes. 38// These are also used a "types" in the generated assembly matcher. 39def I32_0 : WebAssemblyReg<"%i32.0">; 40def I64_0 : WebAssemblyReg<"%i64.0">; 41def F32_0 : WebAssemblyReg<"%f32.0">; 42def F64_0 : WebAssemblyReg<"%f64.0">; 43 44def V128_0: WebAssemblyReg<"%v128">; 45 46def FUNCREF_0 : WebAssemblyReg<"%funcref.0">; 47def EXTERNREF_0 : WebAssemblyReg<"%externref.0">; 48 49// The value stack "register". This is an opaque entity which serves to order 50// uses and defs that must remain in LIFO order. 51def VALUE_STACK : WebAssemblyReg<"STACK">; 52 53// The incoming arguments "register". This is an opaque entity which serves to 54// order the ARGUMENT instructions that are emulating live-in registers and 55// must not be scheduled below other instructions. 56def ARGUMENTS : WebAssemblyReg<"ARGUMENTS">; 57 58//===----------------------------------------------------------------------===// 59// Register classes 60//===----------------------------------------------------------------------===// 61 62def I32 : WebAssemblyRegClass<[i32], 32, (add FP32, SP32, I32_0)>; 63def I64 : WebAssemblyRegClass<[i64], 64, (add FP64, SP64, I64_0)>; 64def F32 : WebAssemblyRegClass<[f32], 32, (add F32_0)>; 65def F64 : WebAssemblyRegClass<[f64], 64, (add F64_0)>; 66def V128 : WebAssemblyRegClass<[v4f32, v2f64, v2i64, v4i32, v16i8, v8i16], 128, 67 (add V128_0)>; 68def FUNCREF : WebAssemblyRegClass<[funcref], 0, (add FUNCREF_0)>; 69def EXTERNREF : WebAssemblyRegClass<[externref], 0, (add EXTERNREF_0)>; 70