Common/MathUtil: Move IntLog2 into MathUtil namespace

Gets this out of the global namespace.

Source/Core/Common/Arm64Emitter.cpp

@@ -3092,7 +3092,7 @@ void ARM64FloatEmitter::FMOV(ARM64Reg Rd, uint8_t imm8)
 // Vector
 void ARM64FloatEmitter::ADD(u8 size, ARM64Reg Rd, ARM64Reg Rn, ARM64Reg Rm)
 {
-  EmitThreeSame(0, IntLog2(size) - 3, 0b10000, Rd, Rn, Rm);
+  EmitThreeSame(0, MathUtil::IntLog2(size) - 3, 0b10000, Rd, Rn, Rm);
 }
 void ARM64FloatEmitter::AND(ARM64Reg Rd, ARM64Reg Rn, ARM64Reg Rm)
 {

Source/Core/Common/MathUtil.h

@@ -185,10 +185,9 @@ private:
   T m_variance{};
 };
 
-}  // namespace MathUtil
-
 // Rounds down. 0 -> undefined
 constexpr int IntLog2(u64 val)
 {
   return 63 - std::countl_zero(val);
 }
+}  // namespace MathUtil

Source/Core/Core/PowerPC/Jit64/Jit_Integer.cpp

@@ -1223,7 +1223,7 @@ void Jit64::MultiplyImmediate(u32 imm, int a, int d, bool overflow)
     // power of 2; just a shift
     if (MathUtil::IsPow2(imm))
     {
-      u32 shift = IntLog2(imm);
+      u32 shift = MathUtil::IntLog2(imm);
       // use LEA if it saves an op
       if (d != a && shift <= 3 && shift >= 1 && Ra.IsSimpleReg())
       {
@@ -1731,7 +1731,7 @@ void Jit64::divwx(UGeckoInstruction inst)
       TEST(32, R(dividend), R(dividend));
       LEA(32, sum, MDisp(dividend, abs_val - 1));
       CMOVcc(32, Rd, R(src), cond);
-      SAR(32, Rd, Imm8(IntLog2(abs_val)));
+      SAR(32, Rd, Imm8(MathUtil::IntLog2(abs_val)));
 
       if (divisor < 0)
         NEG(32, Rd);

Source/Core/Core/PowerPC/Jit64/Jit_SystemRegisters.cpp

@@ -198,7 +198,7 @@ void Jit64::UpdateFPExceptionSummary(X64Reg fpscr, X64Reg tmp1, X64Reg tmp2)
   // fpscr.VX = (fpscr & FPSCR_VX_ANY) != 0
   TEST(32, R(fpscr), Imm32(FPSCR_VX_ANY));
   SETcc(CC_NZ, R(tmp1));
-  SHL(32, R(tmp1), Imm8(IntLog2(FPSCR_VX)));
+  SHL(32, R(tmp1), Imm8(MathUtil::IntLog2(FPSCR_VX)));
   AND(32, R(fpscr), Imm32(~(FPSCR_VX | FPSCR_FEX)));
   OR(32, R(fpscr), R(tmp1));
 
@@ -212,7 +212,7 @@ void Jit64::UpdateFPExceptionSummary(X64Reg fpscr, X64Reg tmp1, X64Reg tmp2)
   // the TEST, and we can't use XOR right after the TEST since that would overwrite flags. However,
   // there is no false dependency, since SETcc depends on TEST's flags and TEST depends on tmp1.
   SETcc(CC_NZ, R(tmp1));
-  SHL(32, R(tmp1), Imm8(IntLog2(FPSCR_FEX)));
+  SHL(32, R(tmp1), Imm8(MathUtil::IntLog2(FPSCR_FEX)));
   OR(32, R(fpscr), R(tmp1));
 }
 

Source/Core/Core/PowerPC/Jit64Common/EmuCodeBlock.cpp

@@ -97,7 +97,7 @@ FixupBranch EmuCodeBlock::BATAddressLookup(X64Reg addr, X64Reg tmp, const void*
   MOV(64, R(tmp), ImmPtr(bat_table));
   SHR(32, R(addr), Imm8(PowerPC::BAT_INDEX_SHIFT));
   MOV(32, R(addr), MComplex(tmp, addr, SCALE_4, 0));
-  BT(32, R(addr), Imm8(IntLog2(PowerPC::BAT_MAPPED_BIT)));
+  BT(32, R(addr), Imm8(MathUtil::IntLog2(PowerPC::BAT_MAPPED_BIT)));
 
   return J_CC(CC_NC, m_far_code.Enabled());
 }

Source/Core/Core/PowerPC/JitArm64/Jit.cpp

@@ -544,7 +544,7 @@ void JitArm64::WriteConditionalExceptionExit(int exception, ARM64Reg temp_gpr, A
                                              u64 increment_sp_on_exit)
 {
   LDR(IndexType::Unsigned, temp_gpr, PPC_REG, PPCSTATE_OFF(Exceptions));
-  FixupBranch no_exception = TBZ(temp_gpr, IntLog2(exception));
+  FixupBranch no_exception = TBZ(temp_gpr, MathUtil::IntLog2(exception));
 
   const bool switch_to_far_code = !IsInFarCode();
 
@@ -938,7 +938,7 @@ bool JitArm64::DoJit(u32 em_address, JitBlock* b, u32 nextPC)
 
       // Inline exception check
       LDR(IndexType::Unsigned, ARM64Reg::W30, PPC_REG, PPCSTATE_OFF(Exceptions));
-      FixupBranch no_ext_exception = TBZ(ARM64Reg::W30, IntLog2(EXCEPTION_EXTERNAL_INT));
+      FixupBranch no_ext_exception = TBZ(ARM64Reg::W30, MathUtil::IntLog2(EXCEPTION_EXTERNAL_INT));
       FixupBranch exception = B();
       SwitchToFarCode();
       const u8* done_here = GetCodePtr();
@@ -974,7 +974,7 @@ bool JitArm64::DoJit(u32 em_address, JitBlock* b, u32 nextPC)
       ARM64Reg XA = EncodeRegTo64(WA);
 
       LDR(IndexType::Unsigned, WA, PPC_REG, PPCSTATE_OFF(Exceptions));
-      FixupBranch no_ext_exception = TBZ(WA, IntLog2(EXCEPTION_EXTERNAL_INT));
+      FixupBranch no_ext_exception = TBZ(WA, MathUtil::IntLog2(EXCEPTION_EXTERNAL_INT));
       FixupBranch exception = B();
       SwitchToFarCode();
       const u8* done_here = GetCodePtr();

Source/Core/Core/PowerPC/JitArm64/JitArm64_Integer.cpp

@@ -909,7 +909,7 @@ bool JitArm64::MultiplyImmediate(u32 imm, int a, int d, bool rc)
   else if (MathUtil::IsPow2(imm))
   {
     // Multiplication by a power of two (2^n).
-    const int shift = IntLog2(imm);
+    const int shift = MathUtil::IntLog2(imm);
 
     gpr.BindToRegister(d, d == a);
     LSL(gpr.R(d), gpr.R(a), shift);
@@ -919,7 +919,7 @@ bool JitArm64::MultiplyImmediate(u32 imm, int a, int d, bool rc)
   else if (MathUtil::IsPow2(imm - 1))
   {
     // Multiplication by a power of two plus one (2^n + 1).
-    const int shift = IntLog2(imm - 1);
+    const int shift = MathUtil::IntLog2(imm - 1);
 
     gpr.BindToRegister(d, d == a);
     ADD(gpr.R(d), gpr.R(a), gpr.R(a), ArithOption(gpr.R(a), ShiftType::LSL, shift));
@@ -929,7 +929,7 @@ bool JitArm64::MultiplyImmediate(u32 imm, int a, int d, bool rc)
   else if (MathUtil::IsPow2(~imm + 1))
   {
     // Multiplication by a negative power of two (-(2^n)).
-    const int shift = IntLog2(~imm + 1);
+    const int shift = MathUtil::IntLog2(~imm + 1);
 
     gpr.BindToRegister(d, d == a);
     NEG(gpr.R(d), gpr.R(a), ArithOption(gpr.R(a), ShiftType::LSL, shift));
@@ -939,7 +939,7 @@ bool JitArm64::MultiplyImmediate(u32 imm, int a, int d, bool rc)
   else if (MathUtil::IsPow2(~imm + 2))
   {
     // Multiplication by a negative power of two plus one (-(2^n) + 1).
-    const int shift = IntLog2(~imm + 2);
+    const int shift = MathUtil::IntLog2(~imm + 2);
 
     gpr.BindToRegister(d, d == a);
     SUB(gpr.R(d), gpr.R(a), gpr.R(a), ArithOption(gpr.R(a), ShiftType::LSL, shift));
@@ -1603,9 +1603,9 @@ void JitArm64::divwx(UGeckoInstruction inst)
       CSEL(WA, RA, WA, CCFlags::CC_PL);
 
       if (divisor < 0)
-        NEG(RD, WA, ArithOption(WA, ShiftType::ASR, IntLog2(abs_val)));
+        NEG(RD, WA, ArithOption(WA, ShiftType::ASR, MathUtil::IntLog2(abs_val)));
       else
-        ASR(RD, WA, IntLog2(abs_val));
+        ASR(RD, WA, MathUtil::IntLog2(abs_val));
 
       if (allocate_reg)
         gpr.Unlock(WA);

Source/Core/Core/PowerPC/JitArm64/JitArm64_LoadStore.cpp

@@ -347,7 +347,7 @@ FixupBranch JitArm64::BATAddressLookup(ARM64Reg addr_out, ARM64Reg addr_in, ARM6
   MOVP2R(tmp, bat_table);
   LSR(addr_out, addr_in, PowerPC::BAT_INDEX_SHIFT);
   LDR(addr_out, tmp, ArithOption(addr_out, true));
-  FixupBranch pass = TBNZ(addr_out, IntLog2(PowerPC::BAT_MAPPED_BIT));
+  FixupBranch pass = TBNZ(addr_out, MathUtil::IntLog2(PowerPC::BAT_MAPPED_BIT));
   FixupBranch fail = B();
   SetJumpTarget(pass);
   return fail;
@@ -361,7 +361,7 @@ FixupBranch JitArm64::CheckIfSafeAddress(Arm64Gen::ARM64Reg addr, Arm64Gen::ARM6
   MOVP2R(tmp2, m_mmu.GetDBATTable().data());
   LSR(tmp1, addr, PowerPC::BAT_INDEX_SHIFT);
   LDR(tmp1, tmp2, ArithOption(tmp1, true));
-  FixupBranch pass = TBNZ(tmp1, IntLog2(PowerPC::BAT_PHYSICAL_BIT));
+  FixupBranch pass = TBNZ(tmp1, MathUtil::IntLog2(PowerPC::BAT_PHYSICAL_BIT));
   FixupBranch fail = B();
   SetJumpTarget(pass);
   return fail;

Source/Core/Core/PowerPC/JitArm64/JitArm64_SystemRegisters.cpp

@@ -60,13 +60,13 @@ void JitArm64::UpdateFPExceptionSummary(ARM64Reg fpscr)
   MOVI2R(WA, FPSCR_VX_ANY);
   TST(WA, fpscr);
   CSET(WA, CCFlags::CC_NEQ);
-  BFI(fpscr, WA, IntLog2(FPSCR_VX), 1);
+  BFI(fpscr, WA, MathUtil::IntLog2(FPSCR_VX), 1);
 
   // fpscr.FEX = ((fpscr >> 22) & (fpscr & FPSCR_ANY_E)) != 0
   AND(WA, fpscr, LogicalImm(FPSCR_ANY_E, 32));
   TST(WA, fpscr, ArithOption(fpscr, ShiftType::LSR, 22));
   CSET(WA, CCFlags::CC_NEQ);
-  BFI(fpscr, WA, IntLog2(FPSCR_FEX), 1);
+  BFI(fpscr, WA, MathUtil::IntLog2(FPSCR_FEX), 1);
 
   gpr.Unlock(WA);
 }

Source/Core/UICommon/UICommon.cpp

@@ -547,7 +547,7 @@ std::string FormatSize(u64 bytes, int decimals)
   // div 10 to get largest named unit less than size
   // 10 == log2(1024) (number of B in a KiB, KiB in a MiB, etc)
   // Max value is 63 / 10 = 6
-  const int unit = IntLog2(std::max<u64>(bytes, 1)) / 10;
+  const int unit = MathUtil::IntLog2(std::max<u64>(bytes, 1)) / 10;
 
   // Don't need exact values, only 5 most significant digits
   const double unit_size = std::pow(2, unit * 10);

Source/Core/VideoBackends/OGL/OGLStreamBuffer.cpp

@@ -25,7 +25,7 @@ static u32 GenBuffer()
 
 StreamBuffer::StreamBuffer(u32 type, u32 size)
     : m_buffer(GenBuffer()), m_buffertype(type), m_size(MathUtil::NextPowerOf2(size)),
-      m_bit_per_slot(IntLog2(MathUtil::NextPowerOf2(size) / SYNC_POINTS))
+      m_bit_per_slot(MathUtil::IntLog2(MathUtil::NextPowerOf2(size) / SYNC_POINTS))
 {
   m_iterator = 0;
   m_used_iterator = 0;

Source/Core/VideoCommon/TextureConversionShader.cpp

@@ -202,9 +202,9 @@ static void WriteSwizzler(ShaderCode& code, const EFBCopyParams& params, APIType
   const int blkH = TexDecoder_GetEFBCopyBlockHeightInTexels(params.copy_format);
   int samples = GetEncodedSampleCount(params.copy_format);
 
-  code.Write("  int x_block_position = (uv1.x >> {}) << {};\n", IntLog2(blkH * blkW / samples),
+  code.Write("  int x_block_position = (uv1.x >> {}) << {};\n",
-             IntLog2(blkW));
+             MathUtil::IntLog2(blkH * blkW / samples), MathUtil::IntLog2(blkW));
-  code.Write("  int y_block_position = uv1.y << {};\n", IntLog2(blkH));
+  code.Write("  int y_block_position = uv1.y << {};\n", MathUtil::IntLog2(blkH));
   if (samples == 1)
   {
     // With samples == 1, we write out pairs of blocks; one A8R8, one G8B8.
@@ -212,9 +212,10 @@ static void WriteSwizzler(ShaderCode& code, const EFBCopyParams& params, APIType
     samples = 2;
   }
   code.Write("  int offset_in_block = uv1.x & {};\n", (blkH * blkW / samples) - 1);
-  code.Write("  int y_offset_in_block = offset_in_block >> {};\n", IntLog2(blkW / samples));
+  code.Write("  int y_offset_in_block = offset_in_block >> {};\n",
+             MathUtil::IntLog2(blkW / samples));
   code.Write("  int x_offset_in_block = (offset_in_block & {}) << {};\n", (blkW / samples) - 1,
-             IntLog2(samples));
+             MathUtil::IntLog2(samples));
 
   code.Write("  sampleUv.x = x_block_position + x_offset_in_block;\n"
              "  sampleUv.y = y_block_position + y_offset_in_block;\n");

Source/Core/VideoCommon/TextureInfo.cpp

@@ -83,7 +83,7 @@ TextureInfo::TextureInfo(u32 stage, const u8* ptr, const u8* tlut_ptr, u32 addre
     // e.g. 64x64 with 7 LODs would have the mipmap chain 64x64,32x32,16x16,8x8,4x4,2x2,1x1,0x0, so
     // we limit the mipmap count to 6 there
     const u32 limited_mip_count =
-        std::min<u32>(IntLog2(std::max(width, height)) + 1, raw_mip_count + 1) - 1;
+        std::min<u32>(MathUtil::IntLog2(std::max(width, height)) + 1, raw_mip_count + 1) - 1;
 
     // load mips
     const u8* src_data = m_ptr + GetTextureSize();

Source/UnitTests/Common/MathUtilTest.cpp

@@ -7,15 +7,15 @@
 
 TEST(MathUtil, IntLog2)
 {
-  EXPECT_EQ(0, IntLog2(1));
+  EXPECT_EQ(0, MathUtil::IntLog2(1));
-  EXPECT_EQ(1, IntLog2(2));
+  EXPECT_EQ(1, MathUtil::IntLog2(2));
-  EXPECT_EQ(2, IntLog2(4));
+  EXPECT_EQ(2, MathUtil::IntLog2(4));
-  EXPECT_EQ(3, IntLog2(8));
+  EXPECT_EQ(3, MathUtil::IntLog2(8));
-  EXPECT_EQ(63, IntLog2(0x8000000000000000ull));
+  EXPECT_EQ(63, MathUtil::IntLog2(0x8000000000000000ull));
 
   // Rounding behavior.
-  EXPECT_EQ(3, IntLog2(15));
+  EXPECT_EQ(3, MathUtil::IntLog2(15));
-  EXPECT_EQ(63, IntLog2(0xFFFFFFFFFFFFFFFFull));
+  EXPECT_EQ(63, MathUtil::IntLog2(0xFFFFFFFFFFFFFFFFull));
 }
 
 TEST(MathUtil, NextPowerOf2)