Index: include/clang/Driver/Options.td =================================================================== --- include/clang/Driver/Options.td +++ include/clang/Driver/Options.td @@ -2001,6 +2001,10 @@ def mno_dspr2 : Flag<["-"], "mno-dspr2">, Group; def msingle_float : Flag<["-"], "msingle-float">, Group; def mdouble_float : Flag<["-"], "mdouble-float">, Group; +def mmadd4 : Flag<["-"], "mmadd4">, Group, + HelpText<"Enable the generation of 4-operand madd.s, madd.d and related instructions.">; +def mno_madd4 : Flag<["-"], "mno-madd4">, Group, + HelpText<"Disable the generation of 4-operand madd.s, madd.d and related instructions.">; def mmsa : Flag<["-"], "mmsa">, Group, HelpText<"Enable MSA ASE (MIPS only)">; def mno_msa : Flag<["-"], "mno-msa">, Group, Index: lib/Basic/Targets.cpp =================================================================== --- lib/Basic/Targets.cpp +++ lib/Basic/Targets.cpp @@ -7716,6 +7716,7 @@ NoDSP, DSP1, DSP2 } DspRev; bool HasMSA; + bool DisableMadd4; protected: bool HasFP64; @@ -7726,7 +7727,7 @@ : TargetInfo(Triple), IsMips16(false), IsMicromips(false), IsNan2008(false), IsSingleFloat(false), IsNoABICalls(false), CanUseBSDABICalls(false), FloatABI(HardFloat), DspRev(NoDSP), - HasMSA(false), HasFP64(false) { + HasMSA(false), DisableMadd4(false), HasFP64(false) { TheCXXABI.set(TargetCXXABI::GenericMIPS); setABI((getTriple().getArch() == llvm::Triple::mips || @@ -7972,6 +7973,9 @@ if (HasMSA) Builder.defineMacro("__mips_msa", Twine(1)); + if (DisableMadd4) + Builder.defineMacro("__mips_no_madd4", Twine(1)); + Builder.defineMacro("_MIPS_SZPTR", Twine(getPointerWidth(0))); Builder.defineMacro("_MIPS_SZINT", Twine(getIntWidth())); Builder.defineMacro("_MIPS_SZLONG", Twine(getLongWidth())); @@ -8134,6 +8138,8 @@ DspRev = std::max(DspRev, DSP2); else if (Feature == "+msa") HasMSA = true; + else if (Feature == "+nomadd4") + DisableMadd4 = true; else if (Feature == "+fp64") HasFP64 = true; else if (Feature == "-fp64") Index: lib/Driver/ToolChains/Arch/Mips.cpp =================================================================== --- lib/Driver/ToolChains/Arch/Mips.cpp +++ lib/Driver/ToolChains/Arch/Mips.cpp @@ -298,6 +298,13 @@ AddTargetFeature(Args, Features, options::OPT_mno_odd_spreg, options::OPT_modd_spreg, "nooddspreg"); + + if(Arg *A = Args.getLastArg(options::OPT_mmadd4, options::OPT_mno_madd4)) { + if(A->getOption().matches(options::OPT_mmadd4)) + Features.push_back("-nomadd4"); + else + Features.push_back("+nomadd4"); + } } mips::NanEncoding mips::getSupportedNanEncoding(StringRef &CPU) { Index: test/CodeGen/mips-madd4.c =================================================================== --- test/CodeGen/mips-madd4.c +++ test/CodeGen/mips-madd4.c @@ -0,0 +1,86 @@ +// RUN: %clang --target=mips64-unknown-linux -S -mmadd4 %s -o -| FileCheck %s -check-prefix=MADD4 +// RUN: %clang --target=mips64-unknown-linux -S -mno-madd4 %s -o -| FileCheck %s -check-prefix=NOMADD4 +// RUN: %clang --target=mips64-unknown-linux -S -mmadd4 -fno-honor-nans %s -o -| FileCheck %s -check-prefix=MADD4-NONAN +// RUN: %clang --target=mips64-unknown-linux -S -mno-madd4 -fno-honor-nans %s -o -| FileCheck %s -check-prefix=NOMADD4-NONAN + +float madd_s (float f, float g, float h) +{ + return (f * g) + h; +} +// MADD4: madd.s +// NOMADD4: mul.s +// NOMADD4: add.s + +float msub_s (float f, float g, float h) +{ + return (f * g) - h; +} +// MADD4: msub.s +// NOMADD4: mul.s +// NOMADD4: sub.s + +double madd_d (double f, double g, double h) +{ + return (f * g) + h; +} +// MADD4: madd.d +// NOMADD4: mul.d +// NOMADD4: add.d + +double msub_d (double f, double g, double h) +{ + return (f * g) - h; +} +// MADD4: msub.d +// NOMADD4: mul.d +// NOMADD4: sub.d + + +float nmadd_s (float f, float g, float h) +{ + // FIXME: Zero has been explicitly placed to force generation of a positive + // zero in IR until pattern used to match this instruction is changed to + // comply with negative zero as well. + return 0-((f * g) + h); +} +// MADD4-NONAN: nmadd.s +// NOMADD4-NONAN: mul.s +// NOMADD4-NONAN: add.s +// NOMADD4-NONAN: sub.s + +float nmsub_s (float f, float g, float h) +{ + // FIXME: Zero has been explicitly placed to force generation of a positive + // zero in IR until pattern used to match this instruction is changed to + // comply with negative zero as well. + return 0-((f * g) - h); +} +// MADD4-NONAN: nmsub.s +// NOMADD4-NONAN: mul.s +// NOMADD4-NONAN: sub.s +// NOMADD4-NONAN: sub.s + +double nmadd_d (double f, double g, double h) +{ + // FIXME: Zero has been explicitly placed to force generation of a positive + // zero in IR until pattern used to match this instruction is changed to + // comply with negative zero as well. + return 0-((f * g) + h); +} +// MADD4-NONAN: nmadd.d +// NOMADD4-NONAN: mul.d +// NOMADD4-NONAN: add.d +// NOMADD4-NONAN: sub.d + +double nmsub_d (double f, double g, double h) +{ + // FIXME: Zero has been explicitly placed to force generation of a positive + // zero in IR until pattern used to match this instruction is changed to + // comply with negative zero as well. + return 0-((f * g) - h); +} +// MADD4-NONAN: nmsub.d +// NOMADD4-NONAN: mul.d +// NOMADD4-NONAN: sub.d +// NOMADD4-NONAN: sub.d + Index: test/Preprocessor/init.c =================================================================== --- test/Preprocessor/init.c +++ test/Preprocessor/init.c @@ -4664,6 +4664,16 @@ // RUN: | FileCheck -match-full-lines -check-prefix MIPS-MSA %s // MIPS-MSA:#define __mips_msa 1 // +// RUN: %clang_cc1 -target-feature +nomadd4 \ +// RUN: -E -dM -triple=mips-none-none < /dev/null \ +// RUN: | FileCheck -match-full-lines -check-prefix MIPS-NOMADD4 %s +// MIPS-NOMADD4:#define __mips_no_madd4 1 +// +// RUN: %clang_cc1 \ +// RUN: -E -dM -triple=mips-none-none < /dev/null \ +// RUN: | FileCheck -match-full-lines -check-prefix MIPS-MADD4 %s +// MIPS-MADD4-NOT:#define __mips_no_madd4 1 +// // RUN: %clang_cc1 -target-cpu mips32r3 -target-feature +nan2008 \ // RUN: -E -dM -triple=mips-none-none < /dev/null \ // RUN: | FileCheck -match-full-lines -check-prefix MIPS-NAN2008 %s