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[LoongArch] Support LoongArch-specific amswap[_db].{b/h} and amadd[_db].{b/h} instructions #113255

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Merged
merged 2 commits into from
Oct 23, 2024
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[LoongArch] Support LoongArch-specific amswap[_db].{b/h} and amadd[_db].{b/h} instructions #113255

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9628b7d
support amswap[__db].{b/h} and amadd[__db].{b/h} instructions for Loo…
tangaac Oct 11, 2024
8233a04
improve the code and update some tests
tangaac Oct 23, 2024
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4 changes: 4 additions & 0 deletions clang/include/clang/Driver/Options.td
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Expand Up @@ -5394,6 +5394,10 @@ def mfrecipe : Flag<["-"], "mfrecipe">, Group<m_loongarch_Features_Group>,
HelpText<"Enable frecipe.{s/d} and frsqrte.{s/d}">;
def mno_frecipe : Flag<["-"], "mno-frecipe">, Group<m_loongarch_Features_Group>,
HelpText<"Disable frecipe.{s/d} and frsqrte.{s/d}">;
def mlam_bh : Flag<["-"], "mlam-bh">, Group<m_loongarch_Features_Group>,
HelpText<"Enable amswap_[db].{b/h} and amadd_[db].{b/h}">;
def mno_lam_bh : Flag<["-"], "mno-lam-bh">, Group<m_loongarch_Features_Group>,
HelpText<"Disable amswap_[db].{b/h} and amadd_[db].{b/h}">;
def mannotate_tablejump : Flag<["-"], "mannotate-tablejump">, Group<m_loongarch_Features_Group>,
HelpText<"Enable annotate table jump instruction to correlate it with the jump table.">;
def mno_annotate_tablejump : Flag<["-"], "mno-annotate-tablejump">, Group<m_loongarch_Features_Group>,
Expand Down
7 changes: 6 additions & 1 deletion clang/lib/Basic/Targets/LoongArch.cpp
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Expand Up @@ -205,7 +205,7 @@ void LoongArchTargetInfo::getTargetDefines(const LangOptions &Opts,
// TODO: As more features of the V1.1 ISA are supported, a unified "v1.1"
// arch feature set will be used to include all sub-features belonging to
// the V1.1 ISA version.
if (HasFeatureFrecipe)
if (HasFeatureFrecipe && HasFeatureLAM_BH)
Builder.defineMacro("__loongarch_arch",
Twine('"') + "la64v1.1" + Twine('"'));
else
Expand Down Expand Up @@ -236,6 +236,9 @@ void LoongArchTargetInfo::getTargetDefines(const LangOptions &Opts,
if (HasFeatureFrecipe)
Builder.defineMacro("__loongarch_frecipe", Twine(1));

if (HasFeatureLAM_BH)
Builder.defineMacro("__loongarch_lam_bh", Twine(1));

StringRef ABI = getABI();
if (ABI == "lp64d" || ABI == "lp64f" || ABI == "lp64s")
Builder.defineMacro("__loongarch_lp64");
Expand Down Expand Up @@ -312,6 +315,8 @@ bool LoongArchTargetInfo::handleTargetFeatures(
HasUnalignedAccess = false;
else if (Feature == "+frecipe")
HasFeatureFrecipe = true;
else if (Feature == "+lam-bh")
HasFeatureLAM_BH = true;
}
return true;
}
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2 changes: 2 additions & 0 deletions clang/lib/Basic/Targets/LoongArch.h
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Expand Up @@ -30,6 +30,7 @@ class LLVM_LIBRARY_VISIBILITY LoongArchTargetInfo : public TargetInfo {
bool HasFeatureLSX;
bool HasFeatureLASX;
bool HasFeatureFrecipe;
bool HasFeatureLAM_BH;

public:
LoongArchTargetInfo(const llvm::Triple &Triple, const TargetOptions &)
Expand All @@ -39,6 +40,7 @@ class LLVM_LIBRARY_VISIBILITY LoongArchTargetInfo : public TargetInfo {
HasFeatureLSX = false;
HasFeatureLASX = false;
HasFeatureFrecipe = false;
HasFeatureLAM_BH = false;
LongDoubleWidth = 128;
LongDoubleAlign = 128;
LongDoubleFormat = &llvm::APFloat::IEEEquad();
Expand Down
9 changes: 9 additions & 0 deletions clang/lib/Driver/ToolChains/Arch/LoongArch.cpp
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Expand Up @@ -260,6 +260,15 @@ void loongarch::getLoongArchTargetFeatures(const Driver &D,
else
Features.push_back("-frecipe");
}

// Select lam-bh feature determined by -m[no-]lam-bh.
if (const Arg *A =
Args.getLastArg(options::OPT_mlam_bh, options::OPT_mno_lam_bh)) {
if (A->getOption().matches(options::OPT_mlam_bh))
Features.push_back("+lam-bh");
else
Features.push_back("-lam-bh");
}
}

std::string loongarch::postProcessTargetCPUString(const std::string &CPU,
Expand Down
8 changes: 4 additions & 4 deletions clang/test/Driver/loongarch-march.c
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Expand Up @@ -39,21 +39,21 @@

// CC1-LA64V1P1: "-target-cpu" "loongarch64"
// CC1-LA64V1P1-NOT: "-target-feature"
// CC1-LA64V1P1: "-target-feature" "+64bit" "-target-feature" "+d" "-target-feature" "+lsx" "-target-feature" "+ual" "-target-feature" "+frecipe"
// CC1-LA64V1P1: "-target-feature" "+64bit" "-target-feature" "+d" "-target-feature" "+lsx" "-target-feature" "+ual" "-target-feature" "+frecipe" "-target-feature" "+lam-bh"
// CC1-LA64V1P1-NOT: "-target-feature"
// CC1-LA64V1P1: "-target-abi" "lp64d"

// CC1-LA664: "-target-cpu" "la664"
// CC1-LA664-NOT: "-target-feature"
// CC1-LA664: "-target-feature" "+64bit" "-target-feature" "+f" "-target-feature" "+d" "-target-feature" "+lsx" "-target-feature" "+lasx" "-target-feature" "+ual" "-target-feature" "+frecipe"
// CC1-LA664: "-target-feature" "+64bit" "-target-feature" "+f" "-target-feature" "+d" "-target-feature" "+lsx" "-target-feature" "+lasx" "-target-feature" "+ual" "-target-feature" "+frecipe" "-target-feature" "+lam-bh"
// CC1-LA664-NOT: "-target-feature"
// CC1-LA664: "-target-abi" "lp64d"

// IR-LOONGARCH64: attributes #[[#]] ={{.*}}"target-cpu"="loongarch64" {{.*}}"target-features"="+64bit,+d,+f,+ual"
// IR-LA464: attributes #[[#]] ={{.*}}"target-cpu"="la464" {{.*}}"target-features"="+64bit,+d,+f,+lasx,+lsx,+ual"
// IR-LA64V1P0: attributes #[[#]] ={{.*}}"target-cpu"="loongarch64" {{.*}}"target-features"="+64bit,+d,+lsx,+ual"
// IR-LA64V1P1: attributes #[[#]] ={{.*}}"target-cpu"="loongarch64" {{.*}}"target-features"="+64bit,+d,+frecipe,+lsx,+ual"
// IR-LA664: attributes #[[#]] ={{.*}}"target-cpu"="la664" {{.*}}"target-features"="+64bit,+d,+f,+frecipe,+lasx,+lsx,+ual"
// IR-LA64V1P1: attributes #[[#]] ={{.*}}"target-cpu"="loongarch64" {{.*}}"target-features"="+64bit,+d,+frecipe,+lam-bh,+lsx,+ual"
// IR-LA664: attributes #[[#]] ={{.*}}"target-cpu"="la664" {{.*}}"target-features"="+64bit,+d,+f,+frecipe,+lam-bh,+lasx,+lsx,+ual"

int foo(void) {
return 3;
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30 changes: 30 additions & 0 deletions clang/test/Driver/loongarch-mlam-bh.c
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@@ -0,0 +1,30 @@
/// Test -m[no]lam-bh options.

// RUN: %clang --target=loongarch64 -mlam-bh -fsyntax-only %s -### 2>&1 | \
// RUN: FileCheck %s --check-prefix=CC1-LAM-BH
// RUN: %clang --target=loongarch64 -mno-lam-bh -fsyntax-only %s -### 2>&1 | \
// RUN: FileCheck %s --check-prefix=CC1-NO-LAM-BH
// RUN: %clang --target=loongarch64 -mno-lam-bh -mlam-bh -fsyntax-only %s -### 2>&1 | \
// RUN: FileCheck %s --check-prefix=CC1-LAM-BH
// RUN: %clang --target=loongarch64 -mlam-bh -mno-lam-bh -fsyntax-only %s -### 2>&1 | \
// RUN: FileCheck %s --check-prefix=CC1-NO-LAM-BH

// RUN: %clang --target=loongarch64 -mlam-bh -S -emit-llvm %s -o - | \
// RUN: FileCheck %s --check-prefix=IR-LAM-BH
// RUN: %clang --target=loongarch64 -mno-lam-bh -S -emit-llvm %s -o - | \
// RUN: FileCheck %s --check-prefix=IR-NO-LAM-BH
// RUN: %clang --target=loongarch64 -mno-lam-bh -mlam-bh -S -emit-llvm %s -o - | \
// RUN: FileCheck %s --check-prefix=IR-LAM-BH
// RUN: %clang --target=loongarch64 -mlam-bh -mno-lam-bh -S -emit-llvm %s -o - | \
// RUN: FileCheck %s --check-prefix=IR-NO-LAM-BH


// CC1-LAM-BH: "-target-feature" "+lam-bh"
// CC1-NO-LAM-BH: "-target-feature" "-lam-bh"

// IR-LAM-BH: attributes #[[#]] ={{.*}}"target-features"="{{(.*,)?}}+lam-bh{{(,.*)?}}"
// IR-NO-LAM-BH: attributes #[[#]] ={{.*}}"target-features"="{{(.*,)?}}-lam-bh{{(,.*)?}}"

int foo(void) {
return 42;
}
27 changes: 19 additions & 8 deletions clang/test/Preprocessor/init-loongarch.c
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Expand Up @@ -798,7 +798,7 @@
// LA64-FPU0-LP64S-NOT: #define __loongarch_single_float
// LA64-FPU0-LP64S: #define __loongarch_soft_float 1

/// Check __loongarch_arch{_tune/_frecipe}.
/// Check __loongarch_arch{_tune/_frecipe/_lam_bh}.

// RUN: %clang --target=loongarch64 -x c -E -dM %s -o - | \
// RUN: FileCheck --match-full-lines --check-prefix=ARCH-TUNE -DARCH=la64v1.0 -DTUNE=loongarch64 %s
Expand All @@ -819,30 +819,41 @@
// RUN: %clang --target=loongarch64 -x c -E -dM %s -o - -march=la64v1.0 -Xclang -target-feature -Xclang -lsx | \
// RUN: FileCheck --match-full-lines --check-prefix=ARCH-TUNE -DARCH=loongarch64 -DTUNE=loongarch64 %s
// RUN: %clang --target=loongarch64 -x c -E -dM %s -o - -march=la64v1.0 -Xclang -target-feature -Xclang +frecipe | \
// RUN: FileCheck --match-full-lines --check-prefixes=ARCH-TUNE,FRECIPE -DARCH=la64v1.1 -DTUNE=loongarch64 %s
// RUN: FileCheck --match-full-lines --check-prefixes=ARCH-TUNE,FRECIPE -DARCH=la64v1.0 -DTUNE=loongarch64 %s
// RUN: %clang --target=loongarch64 -x c -E -dM %s -o - -march=loongarch64 -Xclang -target-feature -Xclang +lsx | \
// RUN: FileCheck --match-full-lines --check-prefix=ARCH-TUNE -DARCH=la64v1.0 -DTUNE=loongarch64 %s
// RUN: %clang --target=loongarch64 -x c -E -dM %s -o - -march=la64v1.1 | \
// RUN: FileCheck --match-full-lines --check-prefixes=ARCH-TUNE,FRECIPE -DARCH=la64v1.1 -DTUNE=loongarch64 %s
// RUN: FileCheck --match-full-lines --check-prefixes=ARCH-TUNE,FRECIPE,LAM-BH -DARCH=la64v1.1 -DTUNE=loongarch64 %s
// RUN: %clang --target=loongarch64 -x c -E -dM %s -o - -march=la64v1.1 -Xclang -target-feature -Xclang -frecipe | \
// RUN: FileCheck --match-full-lines --check-prefix=ARCH-TUNE -DARCH=la64v1.0 -DTUNE=loongarch64 %s
// RUN: FileCheck --match-full-lines --check-prefixes=ARCH-TUNE,LAM-BH -DARCH=la64v1.0 -DTUNE=loongarch64 %s
// RUN: %clang --target=loongarch64 -x c -E -dM %s -o - -march=la64v1.1 -Xclang -target-feature -Xclang -lsx | \
// RUN: FileCheck --match-full-lines --check-prefixes=ARCH-TUNE,FRECIPE -DARCH=loongarch64 -DTUNE=loongarch64 %s
// RUN: FileCheck --match-full-lines --check-prefixes=ARCH-TUNE,FRECIPE,LAM-BH -DARCH=loongarch64 -DTUNE=loongarch64 %s
// RUN: %clang --target=loongarch64 -x c -E -dM %s -o - -march=loongarch64 -Xclang -target-feature -Xclang +frecipe | \
// RUN: FileCheck --match-full-lines --check-prefixes=ARCH-TUNE,FRECIPE -DARCH=loongarch64 -DTUNE=loongarch64 %s
// RUN: %clang --target=loongarch64 -x c -E -dM %s -o - -march=loongarch64 -Xclang -target-feature -Xclang +lsx -Xclang -target-feature -Xclang +frecipe | \
// RUN: FileCheck --match-full-lines --check-prefixes=ARCH-TUNE,FRECIPE -DARCH=la64v1.1 -DTUNE=loongarch64 %s
// RUN: FileCheck --match-full-lines --check-prefixes=ARCH-TUNE,FRECIPE -DARCH=la64v1.0 -DTUNE=loongarch64 %s
// RUN: %clang --target=loongarch64 -x c -E -dM %s -o - -march=la64v1.0 -Xclang -target-feature -Xclang +lam-bh | \
// RUN: FileCheck --match-full-lines --check-prefixes=ARCH-TUNE,LAM-BH -DARCH=la64v1.0 -DTUNE=loongarch64 %s
// RUN: %clang --target=loongarch64 -x c -E -dM %s -o - -march=la64v1.1 -Xclang -target-feature -Xclang -lam-bh | \
// RUN: FileCheck --match-full-lines --check-prefixes=ARCH-TUNE,FRECIPE -DARCH=la64v1.0 -DTUNE=loongarch64 %s
// RUN: %clang --target=loongarch64 -x c -E -dM %s -o - -march=loongarch64 -Xclang -target-feature -Xclang +lam-bh | \
// RUN: FileCheck --match-full-lines --check-prefixes=ARCH-TUNE,LAM-BH -DARCH=loongarch64 -DTUNE=loongarch64 %s
// RUN: %clang --target=loongarch64 -x c -E -dM %s -o - -march=loongarch64 -Xclang -target-feature -Xclang +lsx -Xclang -target-feature -Xclang +lam-bh | \
// RUN: FileCheck --match-full-lines --check-prefixes=ARCH-TUNE,LAM-BH -DARCH=la64v1.0 -DTUNE=loongarch64 %s
// RUN: %clang --target=loongarch64 -x c -E -dM %s -o - -march=la64v1.0 -Xclang -target-feature -Xclang +frecipe -Xclang -target-feature -Xclang +lam-bh | \
// RUN: FileCheck --match-full-lines --check-prefixes=ARCH-TUNE -DARCH=la64v1.1 -DTUNE=loongarch64 %s
// RUN: %clang --target=loongarch64 -x c -E -dM %s -o - -march=la664 | \
// RUN: FileCheck --match-full-lines --check-prefixes=ARCH-TUNE,FRECIPE -DARCH=la664 -DTUNE=la664 %s
// RUN: FileCheck --match-full-lines --check-prefixes=ARCH-TUNE,FRECIPE,LAM-BH -DARCH=la664 -DTUNE=la664 %s
// RUN: %clang --target=loongarch64 -x c -E -dM %s -o - -mtune=la664 | \
// RUN: FileCheck --match-full-lines --check-prefix=ARCH-TUNE -DARCH=la64v1.0 -DTUNE=la664 %s
// RUN: %clang --target=loongarch64 -x c -E -dM %s -o - -march=loongarch64 -mtune=la664 | \
// RUN: FileCheck --match-full-lines --check-prefix=ARCH-TUNE -DARCH=loongarch64 -DTUNE=la664 %s
// RUN: %clang --target=loongarch64 -x c -E -dM %s -o - -march=la664 -mtune=loongarch64 | \
// RUN: FileCheck --match-full-lines --check-prefixes=ARCH-TUNE,FRECIPE -DARCH=la664 -DTUNE=loongarch64 %s
// RUN: FileCheck --match-full-lines --check-prefixes=ARCH-TUNE,FRECIPE,LAM-BH -DARCH=la664 -DTUNE=loongarch64 %s

// ARCH-TUNE: #define __loongarch_arch "[[ARCH]]"
// FRECIPE: #define __loongarch_frecipe 1
// LAM-BH: #define __loongarch_lam_bh 1
// ARCH-TUNE: #define __loongarch_tune "[[TUNE]]"

// RUN: %clang --target=loongarch64 -mlsx -x c -E -dM %s -o - \
Expand Down
3 changes: 2 additions & 1 deletion llvm/include/llvm/TargetParser/LoongArchTargetParser.def
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Expand Up @@ -11,6 +11,7 @@ LOONGARCH_FEATURE("+lbt", FK_LBT)
LOONGARCH_FEATURE("+lvz", FK_LVZ)
LOONGARCH_FEATURE("+ual", FK_UAL)
LOONGARCH_FEATURE("+frecipe", FK_FRECIPE)
LOONGARCH_FEATURE("+lam-bh", FK_LAM_BH)

#undef LOONGARCH_FEATURE

Expand All @@ -20,6 +21,6 @@ LOONGARCH_FEATURE("+frecipe", FK_FRECIPE)

LOONGARCH_ARCH("loongarch64", AK_LOONGARCH64, FK_64BIT | FK_FP32 | FK_FP64 | FK_UAL)
LOONGARCH_ARCH("la464", AK_LA464, FK_64BIT | FK_FP32 | FK_FP64 | FK_LSX | FK_LASX | FK_UAL)
LOONGARCH_ARCH("la664", AK_LA664, FK_64BIT | FK_FP32 | FK_FP64 | FK_LSX | FK_LASX | FK_UAL | FK_FRECIPE)
LOONGARCH_ARCH("la664", AK_LA664, FK_64BIT | FK_FP32 | FK_FP64 | FK_LSX | FK_LASX | FK_UAL | FK_FRECIPE | FK_LAM_BH)

#undef LOONGARCH_ARCH
4 changes: 4 additions & 0 deletions llvm/include/llvm/TargetParser/LoongArchTargetParser.h
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Expand Up @@ -49,6 +49,10 @@ enum FeatureKind : uint32_t {

// Floating-point approximate reciprocal instructions are available.
FK_FRECIPE = 1 << 9,

// Atomic memory swap and add instructions for byte and half word are
// available.
FK_LAM_BH = 1 << 10,
};

struct FeatureInfo {
Expand Down
9 changes: 8 additions & 1 deletion llvm/lib/Target/LoongArch/LoongArch.td
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Expand Up @@ -112,6 +112,12 @@ def FeatureFrecipe
"Support frecipe.{s/d} and frsqrte.{s/d} instructions.">;
def HasFrecipe : Predicate<"Subtarget->hasFrecipe()">;

// Atomic memory swap and add instructions for byte and half word
def FeatureLAM_BH
: SubtargetFeature<"lam-bh", "HasLAM_BH", "true",
"Support amswap[_db].{b/h} and amadd[_db].{b/h} instructions.">;
def HasLAM_BH : Predicate<"Subtarget->hasLAM_BH()">;

def TunePreferWInst
: SubtargetFeature<"prefer-w-inst", "PreferWInst", "true",
"Prefer instructions with W suffix">;
Expand Down Expand Up @@ -151,7 +157,8 @@ def : ProcessorModel<"la664", NoSchedModel, [Feature64Bit,
FeatureExtLASX,
FeatureExtLVZ,
FeatureExtLBT,
FeatureFrecipe]>;
FeatureFrecipe,
FeatureLAM_BH]>;

//===----------------------------------------------------------------------===//
// Define the LoongArch target.
Expand Down
7 changes: 7 additions & 0 deletions llvm/lib/Target/LoongArch/LoongArchISelLowering.cpp
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Expand Up @@ -5735,6 +5735,13 @@ LoongArchTargetLowering::shouldExpandAtomicRMWInIR(AtomicRMWInst *AI) const {
AI->getOperation() == AtomicRMWInst::USubSat)
return AtomicExpansionKind::CmpXChg;

if (Subtarget.hasLAM_BH() && Subtarget.is64Bit() &&
(AI->getOperation() == AtomicRMWInst::Xchg ||
AI->getOperation() == AtomicRMWInst::Add ||
AI->getOperation() == AtomicRMWInst::Sub)) {
return AtomicExpansionKind::None;
}

unsigned Size = AI->getType()->getPrimitiveSizeInBits();
if (Size == 8 || Size == 16)
return AtomicExpansionKind::MaskedIntrinsic;
Expand Down
29 changes: 29 additions & 0 deletions llvm/lib/Target/LoongArch/LoongArchInstrInfo.td
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Expand Up @@ -2088,6 +2088,35 @@ multiclass binary_atomic_op_wd<string inst, string op, string signed = ""> {
(!cast<Instruction>(inst#"__DB_D"#signed) GPR:$rk, GPR:$rj)>;
}

// Atomic operation for byte and half word
multiclass binary_atomic_op_bh<string inst, string op> {
def : Pat<(!cast<PatFrag>(op#"_i8_monotonic") GPR:$rj, GPR:$rk),
(!cast<Instruction>(inst#"_B") GPR:$rk, GPR:$rj)>;
def : Pat<(!cast<PatFrag>(op#"_i16_monotonic") GPR:$rj, GPR:$rk),
(!cast<Instruction>(inst#"_H") GPR:$rk, GPR:$rj)>;

def : Pat<(!cast<PatFrag>(op#"_i8") GPR:$rj, GPR:$rk),
(!cast<Instruction>(inst#"__DB_B") GPR:$rk, GPR:$rj)>;
def : Pat<(!cast<PatFrag>(op#"_i16") GPR:$rj, GPR:$rk),
(!cast<Instruction>(inst#"__DB_H") GPR:$rk, GPR:$rj)>;
}

let Predicates = [ HasLAM_BH, IsLA64 ] in {

defm : binary_atomic_op_bh<"AMSWAP", "atomic_swap">;
defm : binary_atomic_op_bh<"AMADD", "atomic_load_add">;
def : Pat<(atomic_load_sub_i8_monotonic GPR:$rj, GPR:$rk),
(AMADD_B (SUB_W R0, GPR:$rk), GPR:$rj)>;
def : Pat<(atomic_load_sub_i16_monotonic GPR:$rj, GPR:$rk),
(AMADD_H (SUB_W R0, GPR:$rk), GPR:$rj)>;

def : Pat<(atomic_load_sub_i8 GPR:$rj, GPR:$rk),
(AMADD__DB_B (SUB_W R0, GPR:$rk), GPR:$rj)>;
def : Pat<(atomic_load_sub_i16 GPR:$rj, GPR:$rk),
(AMADD__DB_H (SUB_W R0, GPR:$rk), GPR:$rj)>;
} // Predicates = [ IsLA64, HasLAM_BH ]


let Predicates = [IsLA64] in {

defm : binary_atomic_op_wd<"AMSWAP", "atomic_swap">;
Expand Down
4 changes: 3 additions & 1 deletion llvm/lib/TargetParser/LoongArchTargetParser.cpp
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Expand Up @@ -50,8 +50,10 @@ bool LoongArch::getArchFeatures(StringRef Arch,
Features.push_back("+d");
Features.push_back("+lsx");
Features.push_back("+ual");
if (Arch == "la64v1.1")
if (Arch == "la64v1.1") {
Features.push_back("+frecipe");
Features.push_back("+lam-bh");
}
return true;
}

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