Index: clang/test/Preprocessor/riscv-target-features.c =================================================================== --- clang/test/Preprocessor/riscv-target-features.c +++ clang/test/Preprocessor/riscv-target-features.c @@ -41,6 +41,7 @@ // CHECK-NOT: __riscv_zicboz // CHECK-NOT: __riscv_svnapot // CHECK-NOT: __riscv_svinval +// CHECK-NOT: __riscv_xventanacondops // RUN: %clang -target riscv32-unknown-linux-gnu -march=rv32im -x c -E -dM %s \ // RUN: -o - | FileCheck --check-prefix=CHECK-M-EXT %s @@ -432,3 +433,7 @@ // RUN: %clang -target riscv64 -march=rv64isvinval -x c -E -dM %s \ // RUN: -o - | FileCheck --check-prefix=CHECK-SVINVAL-EXT %s // CHECK-SVINVAL-EXT: __riscv_svinval 1000000{{$}} + +// RUN: %clang -target riscv64 -march=rv64ixventanacondops -x c -E -dM %s \ +// RUN: -o - | FileCheck --check-prefix=CHECK-XVENTANACONDOPS-EXT %s +// CHECK-XVENTANACONDOPS-EXT: __riscv_xventanacondops 1000000{{$}} Index: llvm/docs/RISCVUsage.rst =================================================================== --- llvm/docs/RISCVUsage.rst +++ llvm/docs/RISCVUsage.rst @@ -149,14 +149,17 @@ Vendor Extensions ================= -Vendor extensions are extensions which are not standardized by RISC-V International, and are instead defined by a hardware vendor. At the moment, LLVM does not support any vendor extensions for RISC-V, but we expect this to change in the future. - -The term vendor extension roughly parallels the definition of a `non-standard` extension from Section 1.3 of the Volume I: RISC-V Unprivileged ISA specification. In particular, we expect to eventually accept both `custom` extensions and `non-conforming` extensions. +Vendor extensions are extensions which are not standardized by RISC-V International, and are instead defined by a hardware vendor. The term vendor extension roughly parallels the definition of a `non-standard` extension from Section 1.3 of the Volume I: RISC-V Unprivileged ISA specification. In particular, we expect to eventually accept both `custom` extensions and `non-conforming` extensions. Inclusion of a vendor extension will be considered on a case by case basis. All proposals should be brought to the bi-weekly RISCV sync calls for discussion. For a general idea of the factors likely to be considered, please see the `Clang documentation `_. It is our intention to follow the naming conventions described in `riscv-non-isa/riscv-toolchain-conventions `_. Exceptions to this naming will need to be strongly motivated. +The current vendor extensions supported are: + +``XVentanaCondOps`` + LLVM implements `version 1.0.0 of the VTx-family custom instructions specification `_ by Ventana Micro Systems. All instructions are prefixed with `vt.` as described in the specification, and the riscv-toolchai-convention document linked above. These instructions are only available for riscv64 at this time. + Specification Documents ======================= Index: llvm/lib/Support/RISCVISAInfo.cpp =================================================================== --- llvm/lib/Support/RISCVISAInfo.cpp +++ llvm/lib/Support/RISCVISAInfo.cpp @@ -104,6 +104,7 @@ {"svnapot", RISCVExtensionVersion{1, 0}}, {"svinval", RISCVExtensionVersion{1, 0}}, + {"xventanacondops", RISCVExtensionVersion{1, 0}}, }; static const RISCVSupportedExtension SupportedExperimentalExtensions[] = { Index: llvm/lib/Target/RISCV/Disassembler/RISCVDisassembler.cpp =================================================================== --- llvm/lib/Target/RISCV/Disassembler/RISCVDisassembler.cpp +++ llvm/lib/Target/RISCV/Disassembler/RISCVDisassembler.cpp @@ -465,6 +465,16 @@ return Result; } } + if (STI.getFeatureBits()[RISCV::FeatureVendorXVentanaCondOps]) { + LLVM_DEBUG(dbgs() << "Trying Vemtama custom opcode table:\n"); + Result = decodeInstruction(DecoderTableVentana32, MI, Insn, Address, this, + STI); + if (Result != MCDisassembler::Fail) { + Size = 4; + return Result; + } + } + LLVM_DEBUG(dbgs() << "Trying RISCV32 table :\n"); Result = decodeInstruction(DecoderTable32, MI, Insn, Address, this, STI); Size = 4; Index: llvm/lib/Target/RISCV/RISCV.td =================================================================== --- llvm/lib/Target/RISCV/RISCV.td +++ llvm/lib/Target/RISCV/RISCV.td @@ -413,6 +413,21 @@ AssemblerPredicate<(all_of FeatureStdExtZawrs), "'Zawrs' (Wait on Reservation Set)">; +//===----------------------------------------------------------------------===// +// Vendor extensions +//===----------------------------------------------------------------------===// + +def FeatureVendorXVentanaCondOps + : SubtargetFeature<"xventanacondops", "HasVendorXVentanaCondOps", "true", + "'XVentanaCondOps' (Ventana Conditional Ops)">; +def HasVendorXVentanaCondOps : Predicate<"Subtarget->hasVendorXVentanaCondOps()">, + AssemblerPredicate<(all_of FeatureVendorXVentanaCondOps), + "'XVentanaCondOps' (Ventana Conditional Ops)">; + +//===----------------------------------------------------------------------===// +// LLVM specific features and extensions +//===----------------------------------------------------------------------===// + // Feature32Bit exists to mark CPUs that support RV32 to distinquish them from // tuning CPU names. def Feature32Bit Index: llvm/lib/Target/RISCV/RISCVInstrInfo.td =================================================================== --- llvm/lib/Target/RISCV/RISCVInstrInfo.td +++ llvm/lib/Target/RISCV/RISCVInstrInfo.td @@ -1780,3 +1780,25 @@ include "RISCVInstrInfoV.td" include "RISCVInstrInfoZfh.td" include "RISCVInstrInfoZicbo.td" + +//===----------------------------------------------------------------------===// +// Vendor extensions +//===----------------------------------------------------------------------===// + +// -XVentanaCondOps +let Predicates = [IsRV64, HasVendorXVentanaCondOps], hasSideEffects = 0, + mayLoad = 0, mayStore = 0, isCodeGenOnly = 0, DecoderNamespace = "Ventana" + in { + +class VTMaskedMove funct3, string opcodestr> + : RVInstR<0b0000000, funct3, OPC_CUSTOM_3, (outs GPR:$rd), + (ins GPR:$rs1, GPR:$rs2), opcodestr, + "$rd, $rs1, $rs2">{ +} + +def VT_MASKC : VTMaskedMove<0b110, "vt.maskc">, + Sched<[WriteIALU, ReadIALU, ReadIALU]>; + +def VT_MASKCN : VTMaskedMove<0b111, "vt.maskcn">, + Sched<[WriteIALU, ReadIALU, ReadIALU]>; +} Index: llvm/lib/Target/RISCV/RISCVSubtarget.h =================================================================== --- llvm/lib/Target/RISCV/RISCVSubtarget.h +++ llvm/lib/Target/RISCV/RISCVSubtarget.h @@ -90,6 +90,7 @@ bool HasStdExtZmmul = false; bool HasStdExtZawrs = false; bool HasStdExtZtso = false; + bool HasVendorXVentanaCondOps = false; bool HasRV32 = false; bool HasRV64 = false; bool IsRV32E = false; @@ -189,6 +190,7 @@ bool hasStdExtZawrs() const { return HasStdExtZawrs; } bool hasStdExtZmmul() const { return HasStdExtZmmul; } bool hasStdExtZtso() const { return HasStdExtZtso; } + bool hasVendorXVentanaCondOps() const { return HasVendorXVentanaCondOps; } bool is64Bit() const { return HasRV64; } bool isRV32E() const { return IsRV32E; } bool enableLinkerRelax() const { return EnableLinkerRelax; } Index: llvm/test/CodeGen/RISCV/attributes.ll =================================================================== --- llvm/test/CodeGen/RISCV/attributes.ll +++ llvm/test/CodeGen/RISCV/attributes.ll @@ -76,6 +76,7 @@ ; RUN: llc -mtriple=riscv64 -mattr=+zicbop %s -o - | FileCheck --check-prefix=RV64ZICBOP %s ; RUN: llc -mtriple=riscv64 -mattr=+svnapot %s -o - | FileCheck --check-prefix=RV64SVNAPOT %s ; RUN: llc -mtriple=riscv64 -mattr=+svinval %s -o - | FileCheck --check-prefix=RV64SVINVAL %s +; RUN: llc -mtriple=riscv64 -mattr=+xventanacondops %s -o - | FileCheck --check-prefix=RV64XVENTANACONDOPS %s ; RUN: llc -mtriple=riscv64 -mattr=+experimental-zawrs %s -o - | FileCheck --check-prefix=RV64ZAWRS %s ; RUN: llc -mtriple=riscv64 -mattr=+experimental-ztso %s -o - | FileCheck --check-prefix=RV64ZTSO %s @@ -157,6 +158,7 @@ ; RV64ZICBOP: .attribute 5, "rv64i2p0_zicbop1p0" ; RV64SVNAPOT: .attribute 5, "rv64i2p0_svnapot1p0" ; RV64SVINVAL: .attribute 5, "rv64i2p0_svinval1p0" +; RV64XVENTANACONDOPS: .attribute 5, "rv64i2p0_xventanacondops1p0" ; RV64ZTSO: .attribute 5, "rv64i2p0_ztso0p1" define i32 @addi(i32 %a) { Index: llvm/test/MC/RISCV/XVentanaCondOps-valid.s =================================================================== --- /dev/null +++ llvm/test/MC/RISCV/XVentanaCondOps-valid.s @@ -0,0 +1,22 @@ +# RUN: llvm-mc %s -triple=riscv64 -mattr=+xventanacondops -riscv-no-aliases -show-encoding \ +# RUN: | FileCheck -check-prefixes=CHECK-ASM,CHECK-ASM-AND-OBJ %s +# RUN: llvm-mc -filetype=obj -triple=riscv64 -mattr=+xventanacondops < %s \ +# RUN: | llvm-objdump --mattr=+xventanacondops -M no-aliases -d -r - \ +# RUN: | FileCheck --check-prefix=CHECK-ASM-AND-OBJ %s + +# CHECK-ASM-AND-OBJ: vt.maskc zero, zero, zero +# CHECK-ASM: encoding: [0x7b,0x60,0x00,0x00] +vt.maskc x0, x0, x0 + +# CHECK-ASM-AND-OBJ: vt.maskcn zero, zero, zero +# CHECK-ASM: encoding: [0x7b,0x70,0x00,0x00] +vt.maskcn x0, x0, x0 + +# CHECK-ASM-AND-OBJ: vt.maskc ra, sp, gp +# CHECK-ASM: encoding: [0xfb,0x60,0x31,0x00] +vt.maskc x1, x2, x3 + +# CHECK-ASM-AND-OBJ: vt.maskcn ra, sp, gp +# CHECK-ASM: encoding: [0xfb,0x70,0x31,0x00] +vt.maskcn x1, x2, x3 +