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-rw-r--r--compiler/dex/quick/arm/codegen_arm.h4
-rw-r--r--compiler/dex/quick/arm/fp_arm.cc26
-rw-r--r--compiler/dex/quick/arm64/codegen_arm64.h4
-rw-r--r--compiler/dex/quick/arm64/fp_arm64.cc26
-rw-r--r--compiler/dex/quick/gen_common.cc28
-rw-r--r--compiler/dex/quick/mips/codegen_mips.h4
-rw-r--r--compiler/dex/quick/mips/fp_mips.cc14
-rw-r--r--compiler/dex/quick/mir_to_lir.cc16
-rw-r--r--compiler/dex/quick/mir_to_lir.h25
-rw-r--r--compiler/dex/quick/x86/codegen_x86.h4
-rwxr-xr-xcompiler/dex/quick/x86/fp_x86.cc14
-rw-r--r--test/703-floating-point-div/expected.txt1
-rw-r--r--test/703-floating-point-div/info.txt1
-rw-r--r--test/703-floating-point-div/src/Main.java90
14 files changed, 253 insertions, 4 deletions
diff --git a/compiler/dex/quick/arm/codegen_arm.h b/compiler/dex/quick/arm/codegen_arm.h
index 179ba02175..d2351997b7 100644
--- a/compiler/dex/quick/arm/codegen_arm.h
+++ b/compiler/dex/quick/arm/codegen_arm.h
@@ -90,6 +90,10 @@ class ArmMir2Lir FINAL : public Mir2Lir {
bool SmallLiteralDivRem(Instruction::Code dalvik_opcode, bool is_div, RegLocation rl_src,
RegLocation rl_dest, int lit);
bool EasyMultiply(RegLocation rl_src, RegLocation rl_dest, int lit) OVERRIDE;
+ void GenMultiplyByConstantFloat(RegLocation rl_dest, RegLocation rl_src1,
+ int32_t constant) OVERRIDE;
+ void GenMultiplyByConstantDouble(RegLocation rl_dest, RegLocation rl_src1,
+ int64_t constant) OVERRIDE;
LIR* CheckSuspendUsingLoad() OVERRIDE;
RegStorage LoadHelper(QuickEntrypointEnum trampoline) OVERRIDE;
LIR* LoadBaseDisp(RegStorage r_base, int displacement, RegStorage r_dest,
diff --git a/compiler/dex/quick/arm/fp_arm.cc b/compiler/dex/quick/arm/fp_arm.cc
index 3eb7c83c11..2b2592d5db 100644
--- a/compiler/dex/quick/arm/fp_arm.cc
+++ b/compiler/dex/quick/arm/fp_arm.cc
@@ -113,6 +113,32 @@ void ArmMir2Lir::GenArithOpDouble(Instruction::Code opcode,
StoreValueWide(rl_dest, rl_result);
}
+void ArmMir2Lir::GenMultiplyByConstantFloat(RegLocation rl_dest, RegLocation rl_src1,
+ int32_t constant) {
+ RegLocation rl_result;
+ RegStorage r_tmp = AllocTempSingle();
+ LoadConstantNoClobber(r_tmp, constant);
+ rl_src1 = LoadValue(rl_src1, kFPReg);
+ rl_result = EvalLoc(rl_dest, kFPReg, true);
+ NewLIR3(kThumb2Vmuls, rl_result.reg.GetReg(), rl_src1.reg.GetReg(), r_tmp.GetReg());
+ StoreValue(rl_dest, rl_result);
+}
+
+void ArmMir2Lir::GenMultiplyByConstantDouble(RegLocation rl_dest, RegLocation rl_src1,
+ int64_t constant) {
+ RegLocation rl_result;
+ RegStorage r_tmp = AllocTempDouble();
+ DCHECK(r_tmp.IsDouble());
+ LoadConstantWide(r_tmp, constant);
+ rl_src1 = LoadValueWide(rl_src1, kFPReg);
+ DCHECK(rl_src1.wide);
+ rl_result = EvalLocWide(rl_dest, kFPReg, true);
+ DCHECK(rl_dest.wide);
+ DCHECK(rl_result.wide);
+ NewLIR3(kThumb2Vmuld, rl_result.reg.GetReg(), rl_src1.reg.GetReg(), r_tmp.GetReg());
+ StoreValueWide(rl_dest, rl_result);
+}
+
void ArmMir2Lir::GenConversion(Instruction::Code opcode, RegLocation rl_dest, RegLocation rl_src) {
int op = kThumbBkpt;
int src_reg;
diff --git a/compiler/dex/quick/arm64/codegen_arm64.h b/compiler/dex/quick/arm64/codegen_arm64.h
index bd363c4fd2..5182a89474 100644
--- a/compiler/dex/quick/arm64/codegen_arm64.h
+++ b/compiler/dex/quick/arm64/codegen_arm64.h
@@ -71,6 +71,10 @@ class Arm64Mir2Lir FINAL : public Mir2Lir {
bool HandleEasyDivRem64(Instruction::Code dalvik_opcode, bool is_div,
RegLocation rl_src, RegLocation rl_dest, int64_t lit);
bool EasyMultiply(RegLocation rl_src, RegLocation rl_dest, int lit) OVERRIDE;
+ void GenMultiplyByConstantFloat(RegLocation rl_dest, RegLocation rl_src1,
+ int32_t constant) OVERRIDE;
+ void GenMultiplyByConstantDouble(RegLocation rl_dest, RegLocation rl_src1,
+ int64_t constant) OVERRIDE;
LIR* CheckSuspendUsingLoad() OVERRIDE;
RegStorage LoadHelper(QuickEntrypointEnum trampoline) OVERRIDE;
LIR* LoadBaseDisp(RegStorage r_base, int displacement, RegStorage r_dest,
diff --git a/compiler/dex/quick/arm64/fp_arm64.cc b/compiler/dex/quick/arm64/fp_arm64.cc
index db24d124ab..ff692b77ac 100644
--- a/compiler/dex/quick/arm64/fp_arm64.cc
+++ b/compiler/dex/quick/arm64/fp_arm64.cc
@@ -116,6 +116,32 @@ void Arm64Mir2Lir::GenArithOpDouble(Instruction::Code opcode,
StoreValueWide(rl_dest, rl_result);
}
+void Arm64Mir2Lir::GenMultiplyByConstantFloat(RegLocation rl_dest, RegLocation rl_src1,
+ int32_t constant) {
+ RegLocation rl_result;
+ RegStorage r_tmp = AllocTempSingle();
+ LoadConstantNoClobber(r_tmp, constant);
+ rl_src1 = LoadValue(rl_src1, kFPReg);
+ rl_result = EvalLoc(rl_dest, kFPReg, true);
+ NewLIR3(kA64Fmul3fff, rl_result.reg.GetReg(), rl_src1.reg.GetReg(), r_tmp.GetReg());
+ StoreValue(rl_dest, rl_result);
+}
+
+void Arm64Mir2Lir::GenMultiplyByConstantDouble(RegLocation rl_dest, RegLocation rl_src1,
+ int64_t constant) {
+ RegLocation rl_result;
+ RegStorage r_tmp = AllocTempDouble();
+ DCHECK(r_tmp.IsDouble());
+ LoadConstantWide(r_tmp, constant);
+ rl_src1 = LoadValueWide(rl_src1, kFPReg);
+ DCHECK(rl_src1.wide);
+ rl_result = EvalLocWide(rl_dest, kFPReg, true);
+ DCHECK(rl_dest.wide);
+ DCHECK(rl_result.wide);
+ NewLIR3(WIDE(kA64Fmul3fff), rl_result.reg.GetReg(), rl_src1.reg.GetReg(), r_tmp.GetReg());
+ StoreValueWide(rl_dest, rl_result);
+}
+
void Arm64Mir2Lir::GenConversion(Instruction::Code opcode,
RegLocation rl_dest, RegLocation rl_src) {
int op = kA64Brk1d;
diff --git a/compiler/dex/quick/gen_common.cc b/compiler/dex/quick/gen_common.cc
index c5aa27c324..061ee0747a 100644
--- a/compiler/dex/quick/gen_common.cc
+++ b/compiler/dex/quick/gen_common.cc
@@ -1785,6 +1785,34 @@ bool Mir2Lir::HandleEasyMultiply(RegLocation rl_src, RegLocation rl_dest, int li
return true;
}
+// Returns true if it generates instructions.
+bool Mir2Lir::HandleEasyFloatingPointDiv(RegLocation rl_dest, RegLocation rl_src1,
+ RegLocation rl_src2) {
+ if (!rl_src2.is_const ||
+ ((cu_->instruction_set != kThumb2) && (cu_->instruction_set != kArm64))) {
+ return false;
+ }
+
+ if (!rl_src2.wide) {
+ int32_t divisor = mir_graph_->ConstantValue(rl_src2);
+ if (CanDivideByReciprocalMultiplyFloat(divisor)) {
+ // Generate multiply by reciprocal instead of div.
+ float recip = 1.0f/bit_cast<int32_t, float>(divisor);
+ GenMultiplyByConstantFloat(rl_dest, rl_src1, bit_cast<float, int32_t>(recip));
+ return true;
+ }
+ } else {
+ int64_t divisor = mir_graph_->ConstantValueWide(rl_src2);
+ if (CanDivideByReciprocalMultiplyDouble(divisor)) {
+ // Generate multiply by reciprocal instead of div.
+ double recip = 1.0/bit_cast<double, int64_t>(divisor);
+ GenMultiplyByConstantDouble(rl_dest, rl_src1, bit_cast<double, int64_t>(recip));
+ return true;
+ }
+ }
+ return false;
+}
+
void Mir2Lir::GenArithOpIntLit(Instruction::Code opcode, RegLocation rl_dest, RegLocation rl_src,
int lit) {
RegLocation rl_result;
diff --git a/compiler/dex/quick/mips/codegen_mips.h b/compiler/dex/quick/mips/codegen_mips.h
index dc6930c45b..7e9d80df65 100644
--- a/compiler/dex/quick/mips/codegen_mips.h
+++ b/compiler/dex/quick/mips/codegen_mips.h
@@ -31,6 +31,10 @@ class MipsMir2Lir FINAL : public Mir2Lir {
bool SmallLiteralDivRem(Instruction::Code dalvik_opcode, bool is_div, RegLocation rl_src,
RegLocation rl_dest, int lit);
bool EasyMultiply(RegLocation rl_src, RegLocation rl_dest, int lit) OVERRIDE;
+ void GenMultiplyByConstantFloat(RegLocation rl_dest, RegLocation rl_src1,
+ int32_t constant) OVERRIDE;
+ void GenMultiplyByConstantDouble(RegLocation rl_dest, RegLocation rl_src1,
+ int64_t constant) OVERRIDE;
LIR* CheckSuspendUsingLoad() OVERRIDE;
RegStorage LoadHelper(QuickEntrypointEnum trampoline) OVERRIDE;
LIR* LoadBaseDisp(RegStorage r_base, int displacement, RegStorage r_dest,
diff --git a/compiler/dex/quick/mips/fp_mips.cc b/compiler/dex/quick/mips/fp_mips.cc
index 431591512e..0a7aa99c98 100644
--- a/compiler/dex/quick/mips/fp_mips.cc
+++ b/compiler/dex/quick/mips/fp_mips.cc
@@ -113,6 +113,20 @@ void MipsMir2Lir::GenArithOpDouble(Instruction::Code opcode,
StoreValueWide(rl_dest, rl_result);
}
+void MipsMir2Lir::GenMultiplyByConstantFloat(RegLocation rl_dest, RegLocation rl_src1,
+ int32_t constant) {
+ // TODO: need mips implementation.
+ UNUSED(rl_dest, rl_src1, constant);
+ LOG(FATAL) << "Unimplemented GenMultiplyByConstantFloat in mips";
+}
+
+void MipsMir2Lir::GenMultiplyByConstantDouble(RegLocation rl_dest, RegLocation rl_src1,
+ int64_t constant) {
+ // TODO: need mips implementation.
+ UNUSED(rl_dest, rl_src1, constant);
+ LOG(FATAL) << "Unimplemented GenMultiplyByConstantDouble in mips";
+}
+
void MipsMir2Lir::GenConversion(Instruction::Code opcode, RegLocation rl_dest,
RegLocation rl_src) {
int op = kMipsNop;
diff --git a/compiler/dex/quick/mir_to_lir.cc b/compiler/dex/quick/mir_to_lir.cc
index 533a6778b5..ccaa167d6a 100644
--- a/compiler/dex/quick/mir_to_lir.cc
+++ b/compiler/dex/quick/mir_to_lir.cc
@@ -1052,28 +1052,36 @@ void Mir2Lir::CompileDalvikInstruction(MIR* mir, BasicBlock* bb, LIR* label_list
}
break;
+ case Instruction::DIV_FLOAT:
+ case Instruction::DIV_FLOAT_2ADDR:
+ if (HandleEasyFloatingPointDiv(rl_dest, rl_src[0], rl_src[1])) {
+ break;
+ }
+ FALLTHROUGH_INTENDED;
case Instruction::ADD_FLOAT:
case Instruction::SUB_FLOAT:
case Instruction::MUL_FLOAT:
- case Instruction::DIV_FLOAT:
case Instruction::REM_FLOAT:
case Instruction::ADD_FLOAT_2ADDR:
case Instruction::SUB_FLOAT_2ADDR:
case Instruction::MUL_FLOAT_2ADDR:
- case Instruction::DIV_FLOAT_2ADDR:
case Instruction::REM_FLOAT_2ADDR:
GenArithOpFloat(opcode, rl_dest, rl_src[0], rl_src[1]);
break;
+ case Instruction::DIV_DOUBLE:
+ case Instruction::DIV_DOUBLE_2ADDR:
+ if (HandleEasyFloatingPointDiv(rl_dest, rl_src[0], rl_src[1])) {
+ break;
+ }
+ FALLTHROUGH_INTENDED;
case Instruction::ADD_DOUBLE:
case Instruction::SUB_DOUBLE:
case Instruction::MUL_DOUBLE:
- case Instruction::DIV_DOUBLE:
case Instruction::REM_DOUBLE:
case Instruction::ADD_DOUBLE_2ADDR:
case Instruction::SUB_DOUBLE_2ADDR:
case Instruction::MUL_DOUBLE_2ADDR:
- case Instruction::DIV_DOUBLE_2ADDR:
case Instruction::REM_DOUBLE_2ADDR:
GenArithOpDouble(opcode, rl_dest, rl_src[0], rl_src[1]);
break;
diff --git a/compiler/dex/quick/mir_to_lir.h b/compiler/dex/quick/mir_to_lir.h
index 4623f79466..bacc6d2e41 100644
--- a/compiler/dex/quick/mir_to_lir.h
+++ b/compiler/dex/quick/mir_to_lir.h
@@ -789,6 +789,7 @@ class Mir2Lir : public Backend {
virtual bool HandleEasyDivRem(Instruction::Code dalvik_opcode, bool is_div,
RegLocation rl_src, RegLocation rl_dest, int lit);
bool HandleEasyMultiply(RegLocation rl_src, RegLocation rl_dest, int lit);
+ bool HandleEasyFloatingPointDiv(RegLocation rl_dest, RegLocation rl_src1, RegLocation rl_src2);
virtual void HandleSlowPaths();
void GenBarrier();
void GenDivZeroException();
@@ -1120,6 +1121,10 @@ class Mir2Lir : public Backend {
virtual bool SmallLiteralDivRem(Instruction::Code dalvik_opcode, bool is_div,
RegLocation rl_src, RegLocation rl_dest, int lit) = 0;
virtual bool EasyMultiply(RegLocation rl_src, RegLocation rl_dest, int lit) = 0;
+ virtual void GenMultiplyByConstantFloat(RegLocation rl_dest, RegLocation rl_src1,
+ int32_t constant) = 0;
+ virtual void GenMultiplyByConstantDouble(RegLocation rl_dest, RegLocation rl_src1,
+ int64_t constant) = 0;
virtual LIR* CheckSuspendUsingLoad() = 0;
virtual RegStorage LoadHelper(QuickEntrypointEnum trampoline) = 0;
@@ -1439,6 +1444,26 @@ class Mir2Lir : public Backend {
return InexpensiveConstantInt(value);
}
+ /**
+ * @brief Whether division by the given divisor can be converted to multiply by its reciprocal.
+ * @param divisor A constant divisor bits of float type.
+ * @return Returns true iff, x/divisor == x*(1.0f/divisor), for every float x.
+ */
+ bool CanDivideByReciprocalMultiplyFloat(int32_t divisor) {
+ // True, if float value significand bits are 0.
+ return ((divisor & 0x7fffff) == 0);
+ }
+
+ /**
+ * @brief Whether division by the given divisor can be converted to multiply by its reciprocal.
+ * @param divisor A constant divisor bits of double type.
+ * @return Returns true iff, x/divisor == x*(1.0/divisor), for every double x.
+ */
+ bool CanDivideByReciprocalMultiplyDouble(int64_t divisor) {
+ // True, if double value significand bits are 0.
+ return ((divisor & ((UINT64_C(1) << 52) - 1)) == 0);
+ }
+
// May be optimized by targets.
virtual void GenMonitorEnter(int opt_flags, RegLocation rl_src);
virtual void GenMonitorExit(int opt_flags, RegLocation rl_src);
diff --git a/compiler/dex/quick/x86/codegen_x86.h b/compiler/dex/quick/x86/codegen_x86.h
index dec99aefab..4412a1e254 100644
--- a/compiler/dex/quick/x86/codegen_x86.h
+++ b/compiler/dex/quick/x86/codegen_x86.h
@@ -78,6 +78,10 @@ class X86Mir2Lir : public Mir2Lir {
bool SmallLiteralDivRem(Instruction::Code dalvik_opcode, bool is_div, RegLocation rl_src,
RegLocation rl_dest, int lit) OVERRIDE;
bool EasyMultiply(RegLocation rl_src, RegLocation rl_dest, int lit) OVERRIDE;
+ void GenMultiplyByConstantFloat(RegLocation rl_dest, RegLocation rl_src1,
+ int32_t constant) OVERRIDE;
+ void GenMultiplyByConstantDouble(RegLocation rl_dest, RegLocation rl_src1,
+ int64_t constant) OVERRIDE;
LIR* CheckSuspendUsingLoad() OVERRIDE;
RegStorage LoadHelper(QuickEntrypointEnum trampoline) OVERRIDE;
LIR* LoadBaseDisp(RegStorage r_base, int displacement, RegStorage r_dest,
diff --git a/compiler/dex/quick/x86/fp_x86.cc b/compiler/dex/quick/x86/fp_x86.cc
index 254d90fa8c..33bb0eeb76 100755
--- a/compiler/dex/quick/x86/fp_x86.cc
+++ b/compiler/dex/quick/x86/fp_x86.cc
@@ -122,6 +122,20 @@ void X86Mir2Lir::GenArithOpDouble(Instruction::Code opcode,
StoreValueWide(rl_dest, rl_result);
}
+void X86Mir2Lir::GenMultiplyByConstantFloat(RegLocation rl_dest, RegLocation rl_src1,
+ int32_t constant) {
+ // TODO: need x86 implementation.
+ UNUSED(rl_dest, rl_src1, constant);
+ LOG(FATAL) << "Unimplemented GenMultiplyByConstantFloat in x86";
+}
+
+void X86Mir2Lir::GenMultiplyByConstantDouble(RegLocation rl_dest, RegLocation rl_src1,
+ int64_t constant) {
+ // TODO: need x86 implementation.
+ UNUSED(rl_dest, rl_src1, constant);
+ LOG(FATAL) << "Unimplemented GenMultiplyByConstantDouble in x86";
+}
+
void X86Mir2Lir::GenLongToFP(RegLocation rl_dest, RegLocation rl_src, bool is_double) {
// Compute offsets to the source and destination VRs on stack
int src_v_reg_offset = SRegOffset(rl_src.s_reg_low);
diff --git a/test/703-floating-point-div/expected.txt b/test/703-floating-point-div/expected.txt
new file mode 100644
index 0000000000..76f5a5a5aa
--- /dev/null
+++ b/test/703-floating-point-div/expected.txt
@@ -0,0 +1 @@
+Done!
diff --git a/test/703-floating-point-div/info.txt b/test/703-floating-point-div/info.txt
new file mode 100644
index 0000000000..418b831350
--- /dev/null
+++ b/test/703-floating-point-div/info.txt
@@ -0,0 +1 @@
+Simple tests to check floating point division.
diff --git a/test/703-floating-point-div/src/Main.java b/test/703-floating-point-div/src/Main.java
new file mode 100644
index 0000000000..9990a545f4
--- /dev/null
+++ b/test/703-floating-point-div/src/Main.java
@@ -0,0 +1,90 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+public class Main {
+
+ static double dPi = Math.PI;
+ static float fPi = (float)Math.PI;
+
+ public static void expectEquals(long expected, long result) {
+ if (expected != result) {
+ throw new Error("Expected: " + expected + ", found: " + result);
+ }
+ }
+
+ public static void expectEquals(int expected, int result) {
+ if (expected != result) {
+ throw new Error("Expected: " + expected + ", found: " + result);
+ }
+ }
+
+ public static void divDoubleTest() {
+ double d1 = 0x1.0p1023;
+ double d2 = -2.0;
+ double d3 = 0.0;
+ double d4 = Double.MIN_NORMAL;
+ double d5 = Double.POSITIVE_INFINITY;
+ double d6 = Double.NEGATIVE_INFINITY;
+ double d7 = -0.0;
+ double d8 = Double.MAX_VALUE;
+ double d9 = Double.MIN_VALUE;
+ double d0 = Double.NaN;
+
+ expectEquals(Double.doubleToRawLongBits(dPi/d1), 0x1921fb54442d18L);
+ expectEquals(Double.doubleToRawLongBits(dPi/d2), 0xbff921fb54442d18L);
+ expectEquals(Double.doubleToRawLongBits(dPi/d3), 0x7ff0000000000000L);
+ expectEquals(Double.doubleToRawLongBits(dPi/d4), 0x7fe921fb54442d18L);
+ expectEquals(Double.doubleToRawLongBits(dPi/d5), 0x0L);
+ expectEquals(Double.doubleToRawLongBits(dPi/d6), 0x8000000000000000L);
+ expectEquals(Double.doubleToRawLongBits(dPi/d7), 0xfff0000000000000L);
+
+ expectEquals(Double.doubleToRawLongBits(dPi/d8), 0xc90fdaa22168cL);
+ expectEquals(Double.doubleToRawLongBits(dPi/d9), 0x7ff0000000000000L);
+ expectEquals(Double.doubleToRawLongBits(dPi/d0), 0x7ff8000000000000L);
+ }
+
+ public static void divFloatTest() {
+ float f1 = 0x1.0p127f;
+ float f2 = -2.0f;
+ float f3 = 0.0f;
+ float f4 = Float.MIN_NORMAL;
+ float f5 = Float.POSITIVE_INFINITY;
+ float f6 = Float.NEGATIVE_INFINITY;
+ float f7 = -0.0f;
+ float f8 = Float.MAX_VALUE;
+ float f9 = Float.MIN_VALUE;
+ float f0 = Float.NaN;
+
+ expectEquals(Float.floatToRawIntBits(fPi/f1), 0xc90fdb);
+ expectEquals(Float.floatToRawIntBits(fPi/f2), 0xbfc90fdb);
+ expectEquals(Float.floatToRawIntBits(fPi/f3), 0x7f800000);
+ expectEquals(Float.floatToRawIntBits(fPi/f4), 0x7f490fdb);
+ expectEquals(Float.floatToRawIntBits(fPi/f5), 0x0);
+ expectEquals(Float.floatToRawIntBits(fPi/f6), 0x80000000);
+ expectEquals(Float.floatToRawIntBits(fPi/f7), 0xff800000);
+
+ expectEquals(Float.floatToRawIntBits(fPi/f8), 0x6487ee);
+ expectEquals(Float.floatToRawIntBits(fPi/f9), 0x7f800000);
+ expectEquals(Float.floatToRawIntBits(fPi/f0), 0x7fc00000);
+ }
+
+ public static void main(String[] args) {
+ divDoubleTest();
+ divFloatTest();
+ System.out.println("Done!");
+ }
+
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-26 22:56:34 +0000