Author: lewis-revill Date: Tue Jun 11 05:44:01 2019 New Revision: 363055 URL: http://llvm.org/viewvc/llvm-project?rev=363055&view=rev Log: [RISCV] Add inline asm constraints I, J & K for RISC-V
This allows the constraints I, J & K to be used in inline asm for RISC-V, with the following semantics (equivalent to GCC): I: Any 12-bit signed immediate. J: Integer zero only. K: Any 5-bit unsigned immediate. See the GCC definitions here: https://gcc.gnu.org/onlinedocs/gccint/Machine-Constraints.html Differential Revision: https://reviews.llvm.org/D54091 Modified: cfe/trunk/lib/Basic/Targets/RISCV.cpp cfe/trunk/lib/Basic/Targets/RISCV.h Modified: cfe/trunk/lib/Basic/Targets/RISCV.cpp URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Basic/Targets/RISCV.cpp?rev=363055&r1=363054&r2=363055&view=diff ============================================================================== --- cfe/trunk/lib/Basic/Targets/RISCV.cpp (original) +++ cfe/trunk/lib/Basic/Targets/RISCV.cpp Tue Jun 11 05:44:01 2019 @@ -39,6 +39,26 @@ ArrayRef<TargetInfo::GCCRegAlias> RISCVT return llvm::makeArrayRef(GCCRegAliases); } +bool RISCVTargetInfo::validateAsmConstraint( + const char *&Name, TargetInfo::ConstraintInfo &Info) const { + switch (*Name) { + default: + return false; + case 'I': + // A 12-bit signed immediate. + Info.setRequiresImmediate(-2048, 2047); + return true; + case 'J': + // Integer zero. + Info.setRequiresImmediate(0); + return true; + case 'K': + // A 5-bit unsigned immediate for CSR access instructions. + Info.setRequiresImmediate(0, 31); + return true; + } +} + void RISCVTargetInfo::getTargetDefines(const LangOptions &Opts, MacroBuilder &Builder) const { Builder.defineMacro("__ELF__"); Modified: cfe/trunk/lib/Basic/Targets/RISCV.h URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Basic/Targets/RISCV.h?rev=363055&r1=363054&r2=363055&view=diff ============================================================================== --- cfe/trunk/lib/Basic/Targets/RISCV.h (original) +++ cfe/trunk/lib/Basic/Targets/RISCV.h Tue Jun 11 05:44:01 2019 @@ -61,9 +61,7 @@ public: ArrayRef<TargetInfo::GCCRegAlias> getGCCRegAliases() const override; bool validateAsmConstraint(const char *&Name, - TargetInfo::ConstraintInfo &Info) const override { - return false; - } + TargetInfo::ConstraintInfo &Info) const override; bool hasFeature(StringRef Feature) const override; _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
