ksyx updated this revision to Diff 348206.
ksyx marked an inline comment as done.
ksyx edited the summary of this revision.
ksyx added a comment.
Implemented Zmmul subextension, and let `no-div` to be using this subextension
instead of M itself.
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D102839/new/
https://reviews.llvm.org/D102839
Files:
clang/include/clang/Driver/Options.td
clang/lib/Basic/Targets/RISCV.cpp
clang/lib/Basic/Targets/RISCV.h
clang/lib/Driver/ToolChains/Arch/RISCV.cpp
clang/test/Driver/riscv-no-div.c
llvm/lib/Target/RISCV/RISCV.td
llvm/lib/Target/RISCV/RISCVISelLowering.cpp
llvm/lib/Target/RISCV/RISCVInstrInfoM.td
llvm/lib/Target/RISCV/RISCVSubtarget.h
llvm/test/CodeGen/RISCV/zmmul.ll
llvm/test/MC/RISCV/rv32i-invalid.s
llvm/test/MC/RISCV/rv32zmmul-invaild.s
llvm/test/MC/RISCV/rv32zmmul-valid.s
llvm/test/MC/RISCV/rv64zmmul-invalid.s
llvm/test/MC/RISCV/rv64zmmul-valid.s
Index: llvm/test/MC/RISCV/rv64zmmul-valid.s
===================================================================
--- /dev/null
+++ llvm/test/MC/RISCV/rv64zmmul-valid.s
@@ -0,0 +1,5 @@
+# RUN: llvm-mc %s -triple=riscv64 -mattr=+zmmul -riscv-no-aliases 2>&1 \
+# RUN: | FileCheck -check-prefixes=CHECK-INST %s
+
+# CHECK-INST: mulw ra, sp, gp
+mulw ra, sp, gp
Index: llvm/test/MC/RISCV/rv64zmmul-invalid.s
===================================================================
--- /dev/null
+++ llvm/test/MC/RISCV/rv64zmmul-invalid.s
@@ -0,0 +1,14 @@
+# RUN: not llvm-mc %s -triple=riscv64 -mattr=+zmmul -riscv-no-aliases 2>&1 \
+# RUN: | FileCheck -check-prefixes=CHECK-ERROR %s
+
+# CHECK-ERROR: 5:1: error: instruction requires the following: 'M' (Integer Multiplication and Division)
+divw tp, t0, t1
+
+# CHECK-ERROR: 8:1: error: instruction requires the following: 'M' (Integer Multiplication and Division)
+divuw t2, s0, s2
+
+# CHECK-ERROR: 11:1: error: instruction requires the following: 'M' (Integer Multiplication and Division)
+remw a0, a1, a2
+
+# CHECK-ERROR: 14:1: error: instruction requires the following: 'M' (Integer Multiplication and Division)
+remuw a3, a4, a5
Index: llvm/test/MC/RISCV/rv32zmmul-valid.s
===================================================================
--- /dev/null
+++ llvm/test/MC/RISCV/rv32zmmul-valid.s
@@ -0,0 +1,14 @@
+# RUN: llvm-mc %s -triple=riscv32 -mattr=+zmmul -riscv-no-aliases 2>&1 \
+# RUN: | FileCheck -check-prefixes=CHECK-INST %s
+
+# CHECK-INST: mul a4, ra, s0
+mul a4, ra, s0
+
+# CHECK-INST: mulh ra, zero, zero
+mulh x1, x0, x0
+
+# CHECK-INST: mulhsu t0, t2, t1
+mulhsu t0, t2, t1
+
+# CHECK-INST: mulhu a5, a4, a3
+mulhu a5, a4, a3
Index: llvm/test/MC/RISCV/rv32zmmul-invaild.s
===================================================================
--- /dev/null
+++ llvm/test/MC/RISCV/rv32zmmul-invaild.s
@@ -0,0 +1,14 @@
+# RUN: not llvm-mc %s -triple=riscv32 -mattr=+zmmul -riscv-no-aliases 2>&1 \
+# RUN: | FileCheck -check-prefixes=CHECK-ERROR %s
+
+# CHECK-ERROR: 5:1: error: instruction requires the following: 'M' (Integer Multiplication and Division)
+div s0, s0, s0
+
+# CHECK-ERROR: 8:1: error: instruction requires the following: 'M' (Integer Multiplication and Division)
+divu gp, a0, a1
+
+# CHECK-ERROR: 11:1: error: instruction requires the following: 'M' (Integer Multiplication and Division)
+rem s2, s2, s8
+
+# CHECK-ERROR: 14:1: error: instruction requires the following: 'M' (Integer Multiplication and Division)
+remu x18, x18, x24
Index: llvm/test/MC/RISCV/rv32i-invalid.s
===================================================================
--- llvm/test/MC/RISCV/rv32i-invalid.s
+++ llvm/test/MC/RISCV/rv32i-invalid.s
@@ -169,7 +169,7 @@
xor s2, s2 # CHECK: :[[@LINE]]:1: error: too few operands for instruction
# Instruction not in the base ISA
-mul a4, ra, s0 # CHECK: :[[@LINE]]:1: error: instruction requires the following: 'M' (Integer Multiplication and Division)
+div a4, ra, s0 # CHECK: :[[@LINE]]:1: error: instruction requires the following: 'M' (Integer Multiplication and Division)
amomaxu.w s5, s4, (s3) # CHECK: :[[@LINE]]:1: error: instruction requires the following: 'A' (Atomic Instructions)
fadd.s ft0, ft1, ft2 # CHECK: :[[@LINE]]:1: error: instruction requires the following: 'F' (Single-Precision Floating-Point)
fadd.h ft0, ft1, ft2 # CHECK: :[[@LINE]]:1: error: instruction requires the following: 'Zfh' (Half-Precision Floating-Point)
Index: llvm/test/CodeGen/RISCV/zmmul.ll
===================================================================
--- /dev/null
+++ llvm/test/CodeGen/RISCV/zmmul.ll
@@ -0,0 +1,41 @@
+; RUN: llc -mtriple=riscv32 -mattr=+zmmul -verify-machineinstrs < %s \
+; RUN: | not FileCheck -check-prefix=CHECK-DIV %s
+; RUN: llc -mtriple=riscv64 -mattr=+zmmul -verify-machineinstrs < %s \
+; RUN: | not FileCheck -check-prefix=CHECK-DIV %s
+; RUN: llc -mtriple=riscv32 -mattr=+zmmul -verify-machineinstrs < %s \
+; RUN: | not FileCheck -check-prefix=CHECK-REM %s
+; RUN: llc -mtriple=riscv64 -mattr=+zmmul -verify-machineinstrs < %s \
+; RUN: | not FileCheck -check-prefix=CHECK-REM %s
+
+; RUN: llc -mtriple=riscv32 -mattr=+zmmul -verify-machineinstrs < %s \
+; RUN: | not FileCheck -check-prefix=CHECK-UDIV %s
+; RUN: llc -mtriple=riscv64 -mattr=+zmmul -verify-machineinstrs < %s \
+; RUN: | not FileCheck -check-prefix=CHECK-UDIV %s
+; RUN: llc -mtriple=riscv32 -mattr=+zmmul -verify-machineinstrs < %s \
+; RUN: | not FileCheck -check-prefix=CHECK-UREM %s
+; RUN: llc -mtriple=riscv64 -mattr=+zmmul -verify-machineinstrs < %s \
+; RUN: | not FileCheck -check-prefix=CHECK-UREM %s
+
+; RUN: llc -mtriple=riscv32 -mattr=+zmmul -verify-machineinstrs < %s \
+; RUN: | FileCheck -check-prefix=CHECK-MUL %s
+; RUN: llc -mtriple=riscv64 -mattr=+zmmul -verify-machineinstrs < %s \
+; RUN: | FileCheck -check-prefix=CHECK-MUL %s
+
+; RUN: llc -mtriple=riscv32 -mattr=+m -verify-machineinstrs < %s \
+; RUN: | FileCheck -check-prefixes=CHECK-MUL,CHECK-UDIV,CHECK-DIV,CHECK-UREM,CHECK-REM %s
+; RUN: llc -mtriple=riscv64 -mattr=+m -verify-machineinstrs < %s \
+; RUN: | FileCheck -check-prefixes=CHECK-MUL,CHECK-UDIV,CHECK-DIV,CHECK-UREM,CHECK-REM %s
+
+define i32 @foo(i32 %a, i32 %b) {
+; CHECK-UDIV: divu{{w?}} {{[as]}}{{[0-9]}}, {{[as]}}{{[0-9]}}, {{[as]}}{{[0-9]}}
+ %1 = udiv i32 %a, %b
+; CHECK-DIV: div{{w?}} {{[as]}}{{[0-9]}}, {{[as]}}{{[0-9]}}, {{[as]}}{{[0-9]}}
+ %2 = sdiv i32 %a, %1
+; CHECK-MUL: mul{{w?}} {{[as]}}{{[0-9]}}, {{[as]}}{{[0-9]}}, {{[as]}}{{[0-9]}}
+ %3 = mul i32 %b, %2
+; CHECK-UREM: remu{{w?}} {{[as]}}{{[0-9]}}, {{[as]}}{{[0-9]}}, {{[as]}}{{[0-9]}}
+ %4 = urem i32 %3, %b
+; CHECK-REM: rem {{[as]}}{{[0-9]}}, {{[as]}}{{[0-9]}}, {{[as]}}{{[0-9]}}
+ %5 = srem i32 %4, %a
+ ret i32 %5
+}
Index: llvm/lib/Target/RISCV/RISCVSubtarget.h
===================================================================
--- llvm/lib/Target/RISCV/RISCVSubtarget.h
+++ llvm/lib/Target/RISCV/RISCVSubtarget.h
@@ -35,6 +35,7 @@
class RISCVSubtarget : public RISCVGenSubtargetInfo {
virtual void anchor();
bool HasStdExtM = false;
+ bool HasStdExtZmmul = false;
bool HasStdExtA = false;
bool HasStdExtF = false;
bool HasStdExtD = false;
@@ -102,6 +103,7 @@
}
bool enableMachineScheduler() const override { return true; }
bool hasStdExtM() const { return HasStdExtM; }
+ bool hasStdExtZmmul() const { return HasStdExtZmmul; }
bool hasStdExtA() const { return HasStdExtA; }
bool hasStdExtF() const { return HasStdExtF; }
bool hasStdExtD() const { return HasStdExtD; }
Index: llvm/lib/Target/RISCV/RISCVInstrInfoM.td
===================================================================
--- llvm/lib/Target/RISCV/RISCVInstrInfoM.td
+++ llvm/lib/Target/RISCV/RISCVInstrInfoM.td
@@ -24,7 +24,7 @@
// Instructions
//===----------------------------------------------------------------------===//
-let Predicates = [HasStdExtM] in {
+let Predicates = [HasStdExtZmmul] in {
def MUL : ALU_rr<0b0000001, 0b000, "mul">,
Sched<[WriteIMul, ReadIMul, ReadIMul]>;
def MULH : ALU_rr<0b0000001, 0b001, "mulh">,
@@ -33,6 +33,9 @@
Sched<[WriteIMul, ReadIMul, ReadIMul]>;
def MULHU : ALU_rr<0b0000001, 0b011, "mulhu">,
Sched<[WriteIMul, ReadIMul, ReadIMul]>;
+} // Predicates = [HasStdExtZmmul]
+
+let Predicates = [HasStdExtM] in {
def DIV : ALU_rr<0b0000001, 0b100, "div">,
Sched<[WriteIDiv, ReadIDiv, ReadIDiv]>;
def DIVU : ALU_rr<0b0000001, 0b101, "divu">,
@@ -43,9 +46,12 @@
Sched<[WriteIDiv, ReadIDiv, ReadIDiv]>;
} // Predicates = [HasStdExtM]
-let Predicates = [HasStdExtM, IsRV64] in {
+let Predicates = [HasStdExtZmmul, IsRV64] in {
def MULW : ALUW_rr<0b0000001, 0b000, "mulw">,
Sched<[WriteIMul32, ReadIMul32, ReadIMul32]>;
+} // Predicates = [HasStdExtZmmul, IsRV64]
+
+let Predicates = [HasStdExtM, IsRV64] in {
def DIVW : ALUW_rr<0b0000001, 0b100, "divw">,
Sched<[WriteIDiv32, ReadIDiv32, ReadIDiv32]>;
def DIVUW : ALUW_rr<0b0000001, 0b101, "divuw">,
@@ -60,21 +66,25 @@
// Pseudo-instructions and codegen patterns
//===----------------------------------------------------------------------===//
-let Predicates = [HasStdExtM] in {
+let Predicates = [HasStdExtZmmul] in {
def : PatGprGpr<mul, MUL>;
def : PatGprGpr<mulhs, MULH>;
def : PatGprGpr<mulhu, MULHU>;
def : PatGprGpr<riscv_mulhsu, MULHSU>;
+} // Predicates = [HasStdExtZmmul]
+
+let Predicates = [HasStdExtM] in {
def : PatGprGpr<sdiv, DIV>;
def : PatGprGpr<udiv, DIVU>;
def : PatGprGpr<srem, REM>;
def : PatGprGpr<urem, REMU>;
} // Predicates = [HasStdExtM]
-let Predicates = [HasStdExtM, IsRV64] in {
+let Predicates = [HasStdExtZmmul] in
def : Pat<(sext_inreg (mul GPR:$rs1, GPR:$rs2), i32),
(MULW GPR:$rs1, GPR:$rs2)>;
+let Predicates = [HasStdExtM, IsRV64] in {
def : PatGprGpr<riscv_divw, DIVW>;
def : PatGprGpr<riscv_divuw, DIVUW>;
def : PatGprGpr<riscv_remuw, REMUW>;
@@ -96,7 +106,7 @@
(REMW GPR:$rs1, GPR:$rs2)>;
} // Predicates = [HasStdExtM, IsRV64]
-let Predicates = [HasStdExtM, IsRV64, NotHasStdExtZba] in {
+let Predicates = [HasStdExtZmmul, IsRV64, NotHasStdExtZba] in {
// Special case for calculating the full 64-bit product of a 32x32 unsigned
// multiply where the inputs aren't known to be zero extended. We can shift the
// inputs left by 32 and use a MULHU. This saves two SRLIs needed to finish
@@ -112,4 +122,4 @@
def : Pat<(sext_inreg (mul (and GPR:$rs1, 0xffffffff),
(and GPR:$rs2, 0xffffffff)), i32),
(ADDIW (MULHU (SLLI GPR:$rs1, 32), (SLLI GPR:$rs2, 32)), 0)>;
-} // Predicates = [HasStdExtM, IsRV64, NotHasStdExtZba]
+} // Predicates = [HasStdExtZmmul, IsRV64, NotHasStdExtZba]
Index: llvm/lib/Target/RISCV/RISCVISelLowering.cpp
===================================================================
--- llvm/lib/Target/RISCV/RISCVISelLowering.cpp
+++ llvm/lib/Target/RISCV/RISCVISelLowering.cpp
@@ -201,19 +201,26 @@
setOperationAction(ISD::USUBSAT, MVT::i32, Custom);
}
- if (!Subtarget.hasStdExtM()) {
+ if (!Subtarget.hasStdExtZmmul()) {
setOperationAction(ISD::MUL, XLenVT, Expand);
setOperationAction(ISD::MULHS, XLenVT, Expand);
setOperationAction(ISD::MULHU, XLenVT, Expand);
+ } else {
+ if (Subtarget.is64Bit()) {
+ setOperationAction(ISD::MUL, MVT::i32, Custom);
+ setOperationAction(ISD::MUL, MVT::i128, Custom);
+ } else {
+ setOperationAction(ISD::MUL, MVT::i64, Custom);
+ }
+ }
+
+ if (!Subtarget.hasStdExtM()) {
setOperationAction(ISD::SDIV, XLenVT, Expand);
setOperationAction(ISD::UDIV, XLenVT, Expand);
setOperationAction(ISD::SREM, XLenVT, Expand);
setOperationAction(ISD::UREM, XLenVT, Expand);
} else {
if (Subtarget.is64Bit()) {
- setOperationAction(ISD::MUL, MVT::i32, Custom);
- setOperationAction(ISD::MUL, MVT::i128, Custom);
-
setOperationAction(ISD::SDIV, MVT::i8, Custom);
setOperationAction(ISD::UDIV, MVT::i8, Custom);
setOperationAction(ISD::UREM, MVT::i8, Custom);
@@ -223,8 +230,6 @@
setOperationAction(ISD::SDIV, MVT::i32, Custom);
setOperationAction(ISD::UDIV, MVT::i32, Custom);
setOperationAction(ISD::UREM, MVT::i32, Custom);
- } else {
- setOperationAction(ISD::MUL, MVT::i64, Custom);
}
}
Index: llvm/lib/Target/RISCV/RISCV.td
===================================================================
--- llvm/lib/Target/RISCV/RISCV.td
+++ llvm/lib/Target/RISCV/RISCV.td
@@ -12,9 +12,17 @@
// RISC-V subtarget features and instruction predicates.
//===----------------------------------------------------------------------===//
+def FeatureStdExtZmmul
+ : SubtargetFeature<"zmmul", "HasStdExtZmmul", "true",
+ "'Zmmul' (Integer Multiplication)">;
+def HasStdExtZmmul : Predicate<"Subtarget->hasStdExtZmmul()">,
+ AssemblerPredicate<(all_of FeatureStdExtZmmul),
+ "'Zmmul' (Integer Multiplication)">;
+
def FeatureStdExtM
: SubtargetFeature<"m", "HasStdExtM", "true",
- "'M' (Integer Multiplication and Division)">;
+ "'M' (Integer Multiplication and Division)",
+ [FeatureStdExtZmmul]>;
def HasStdExtM : Predicate<"Subtarget->hasStdExtM()">,
AssemblerPredicate<(all_of FeatureStdExtM),
"'M' (Integer Multiplication and Division)">;
Index: clang/test/Driver/riscv-no-div.c
===================================================================
--- /dev/null
+++ clang/test/Driver/riscv-no-div.c
@@ -0,0 +1,30 @@
+// RUN: %clang -target riscv32-unknown-elf %s -mno-div -S -o - 2>&1 \
+// RUN: | not FileCheck -check-prefix=CHECK-DIV %s
+
+// RUN: %clang -target riscv64-unknown-elf %s -mno-div -S -o - 2>&1 \
+// RUN: | not FileCheck -check-prefix=CHECK-DIV %s
+
+// RUN: %clang -target riscv32-unknown-elf %s -mno-div -S -o - 2>&1 \
+// RUN: | not FileCheck -check-prefix=CHECK-REM %s
+
+// RUN: %clang -target riscv64-unknown-elf %s -mno-div -S -o - 2>&1 \
+// RUN: | not FileCheck -check-prefix=CHECK-REM %s
+
+// RUN: %clang -target riscv32-unknown-elf %s -mno-div -S -o - 2>&1 \
+// RUN: | FileCheck -check-prefix=CHECK-MUL %s
+
+// RUN: %clang -target riscv64-unknown-elf %s -mno-div -S -o - 2>&1 \
+// RUN: | FileCheck -check-prefix=CHECK-MUL %s
+
+// RUN: %clang -target riscv32-unknown-elf %s -S -o - 2>&1 \
+// RUN: | FileCheck -check-prefixes=CHECK-MUL,CHECK-DIV,CHECK-REM %s
+
+// RUN: %clang -target riscv64-unknown-elf %s -S -o - 2>&1 \
+// RUN: | FileCheck -check-prefixes=CHECK-MUL,CHECK-DIV,CHECK-REM %s
+
+int foo(int x, int y) {
+ // CHECK-DIV: div{{w?}} a{{[0-9]}}, a{{[0-9]}}, a{{[0-9]}}
+ // CHECK-REM: rem{{w?}} a{{[0-9]}}, a{{[0-9]}}, a{{[0-9]}}
+ // CHECK-MUL: mul{{w?}} a{{[0-9]}}, a{{[0-9]}}, a{{[0-9]}}
+ return (x / y) * (x % y);
+}
Index: clang/lib/Driver/ToolChains/Arch/RISCV.cpp
===================================================================
--- clang/lib/Driver/ToolChains/Arch/RISCV.cpp
+++ clang/lib/Driver/ToolChains/Arch/RISCV.cpp
@@ -570,6 +570,15 @@
// Now add any that the user explicitly requested on the command line,
// which may override the defaults.
handleTargetFeaturesGroup(Args, Features, options::OPT_m_riscv_Features_Group);
+
+ bool noDiv = Args.hasFlag(options::OPT_mno_div, options::OPT_mdiv, false);
+ for (auto &Feature : Features) {
+ if (noDiv && (Feature == "+m" || Feature == "-div")) {
+ Feature = "+zmmul";
+ } else if (Feature == "+div") {
+ Feature = "+m";
+ }
+ }
}
StringRef riscv::getRISCVABI(const ArgList &Args, const llvm::Triple &Triple) {
Index: clang/lib/Basic/Targets/RISCV.h
===================================================================
--- clang/lib/Basic/Targets/RISCV.h
+++ clang/lib/Basic/Targets/RISCV.h
@@ -26,6 +26,7 @@
protected:
std::string ABI, CPU;
bool HasM = false;
+ bool HasZmmul = false;
bool HasA = false;
bool HasF = false;
bool HasD = false;
@@ -46,6 +47,7 @@
bool HasZfh = false;
bool HasZvamo = false;
bool HasZvlsseg = false;
+ bool DisableIntDiv = false;
static const Builtin::Info BuiltinInfo[];
Index: clang/lib/Basic/Targets/RISCV.cpp
===================================================================
--- clang/lib/Basic/Targets/RISCV.cpp
+++ clang/lib/Basic/Targets/RISCV.cpp
@@ -141,9 +141,12 @@
Builder.defineMacro("__riscv_arch_test");
Builder.defineMacro("__riscv_i", "2000000");
+ if (HasZmmul || HasM) {
+ Builder.defineMacro("__riscv_mul");
+ }
+
if (HasM) {
Builder.defineMacro("__riscv_m", "2000000");
- Builder.defineMacro("__riscv_mul");
Builder.defineMacro("__riscv_div");
Builder.defineMacro("__riscv_muldiv");
}
@@ -258,6 +261,7 @@
.Case("riscv64", Is64Bit)
.Case("64bit", Is64Bit)
.Case("m", HasM)
+ .Case("zmmul", HasZmmul)
.Case("a", HasA)
.Case("f", HasF)
.Case("d", HasD)
@@ -278,6 +282,7 @@
.Case("experimental-zfh", HasZfh)
.Case("experimental-zvamo", HasZvamo)
.Case("experimental-zvlsseg", HasZvlsseg)
+ .Case("no-div", DisableIntDiv)
.Default(false);
}
@@ -287,6 +292,8 @@
for (const auto &Feature : Features) {
if (Feature == "+m")
HasM = true;
+ else if (Feature == "+zmmul")
+ HasZmmul = true;
else if (Feature == "+a")
HasA = true;
else if (Feature == "+f")
@@ -327,6 +334,8 @@
HasZvamo = true;
else if (Feature == "+experimental-zvlsseg")
HasZvlsseg = true;
+ else if (Feature == "+no-div")
+ DisableIntDiv = true;
}
return true;
Index: clang/include/clang/Driver/Options.td
===================================================================
--- clang/include/clang/Driver/Options.td
+++ clang/include/clang/Driver/Options.td
@@ -3146,6 +3146,10 @@
HelpText<"Enable using library calls for save and restore">;
def mno_save_restore : Flag<["-"], "mno-save-restore">, Group<m_riscv_Features_Group>,
HelpText<"Disable using library calls for save and restore">;
+def mno_div : Flag<["-"], "mno-div">, Group<m_riscv_Features_Group>,
+ HelpText<"Disable integer division instructions in M extension">;
+def mdiv : Flag<["-"], "mdiv">, Group<m_riscv_Features_Group>,
+ HelpText<"Enable integer division instructions in M extension">;
def mcmodel_EQ_medlow : Flag<["-"], "mcmodel=medlow">, Group<m_riscv_Features_Group>,
Flags<[CC1Option]>, Alias<mcmodel_EQ>, AliasArgs<["small"]>,
HelpText<"Equivalent to -mcmodel=small, compatible with RISC-V gcc.">;
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