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[JIT] X64 - Three instruction replacement sequence for multiply in ce…
…rtain cases (#76981) * Using 3 instruction sequence for x64 multiply * Do not do this in morph. Do it in codegen now. * Fixing codegen * Only allow values under 127 and do not skip mov - correctness testing * Try to fix tests * cleanup * Moving to Lowering * Quick fix * Fully works in lowering now * Account for all ints * Take into account codegen opts * Minor cleanup * Minor cleanup * Fixed test * Added int multiply disasm checks. Fixed SuperFileCheck namespace bug. Made SuperFileCheck anchors more likely to match. * Update comments * Update comments * Update comments * Update comments * Formatting * Fixing build * Fixing build again * minor rename * Feedback. Removed use of FULL-LINE as it is more readable not strictly necessary. Forgot to add an additional instruction to a disasm test. * Formatting
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,182 @@ | ||
| // Licensed to the .NET Foundation under one or more agreements. | ||
| // The .NET Foundation licenses this file to you under the MIT license. | ||
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| using System; | ||
| using System.Runtime.CompilerServices; | ||
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| namespace CodeGenTests | ||
| { | ||
| static class IntMultiply | ||
| { | ||
| [MethodImpl(MethodImplOptions.NoInlining)] | ||
| static uint UInt32_MultiplyWithUInt32MaxValue(uint value) | ||
| { | ||
| // X64: mov [[REG0:[a-z]+]], [[REG1:[a-z]+]] | ||
| // X64-NEXT: neg [[REG0]] | ||
| return value * UInt32.MaxValue; | ||
| } | ||
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| [MethodImpl(MethodImplOptions.NoInlining)] | ||
| static ulong UInt64_MultiplyWithUInt32MaxValue(ulong value) | ||
| { | ||
| // X64: mov [[REG0:[a-z]+]], [[REG1:[a-z]+]] | ||
| // X64-NEXT: shl [[REG0]], 32 | ||
| // X64-NEXT: sub [[REG0]], [[REG1]] | ||
| return value * (ulong)UInt32.MaxValue; | ||
| } | ||
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| [MethodImpl(MethodImplOptions.NoInlining)] | ||
| static ulong UInt64_MultiplyWithUInt32MaxValuePlusOne(ulong value) | ||
| { | ||
| // X64: mov [[REG0:[a-z]+]], [[REG1:[a-z]+]] | ||
| // X64-NEXT: shl [[REG0]], 32 | ||
| return value * ((ulong)UInt32.MaxValue + 1); | ||
| } | ||
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| [MethodImpl(MethodImplOptions.NoInlining)] | ||
| static ulong UInt64_MultiplyWithUInt32MaxValuePlusTwo(ulong value) | ||
| { | ||
| // X64: mov [[REG0:[a-z]+]], [[REG1:[a-z]+]] | ||
| // X64-NEXT: shl [[REG0]], 32 | ||
| // X64-NEXT: add [[REG0]], [[REG1]] | ||
| return value * ((ulong)UInt32.MaxValue + 2); | ||
| } | ||
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| [MethodImpl(MethodImplOptions.NoInlining)] | ||
| static ulong UInt64_MultiplyWith2(ulong value) | ||
| { | ||
| // X64: lea [[REG0:[a-z]+]], {{\[}}[[REG1:[a-z]+]]+[[REG1]]{{\]}} | ||
| return value * 2; | ||
| } | ||
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| [MethodImpl(MethodImplOptions.NoInlining)] | ||
| static ulong UInt64_MultiplyWith3(ulong value) | ||
| { | ||
| // X64: lea [[REG0:[a-z]+]], {{\[}}[[REG1:[a-z]+]]+2*[[REG1]]{{\]}} | ||
| return value * 3; | ||
| } | ||
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| [MethodImpl(MethodImplOptions.NoInlining)] | ||
| static ulong UInt64_MultiplyWith4(ulong value) | ||
| { | ||
| // X64: mov [[REG0:[a-z]+]], [[REG1:[a-z]+]] | ||
| // X64-NEXT: shl [[REG0]], 2 | ||
| return value * 4; | ||
| } | ||
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| [MethodImpl(MethodImplOptions.NoInlining)] | ||
| static ulong UInt64_MultiplyWith5(ulong value) | ||
| { | ||
| // X64: lea [[REG0:[a-z]+]], {{\[}}[[REG1:[a-z]+]]+4*[[REG1]]{{\]}} | ||
| return value * 5; | ||
| } | ||
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| [MethodImpl(MethodImplOptions.NoInlining)] | ||
| static ulong UInt64_MultiplyWith6(ulong value) | ||
| { | ||
| // X64: lea [[REG0:[a-z]+]], {{\[}}[[REG1:[a-z]+]]+2*[[REG1]]{{\]}} | ||
| // X64-NEXT: add [[REG0]], [[REG0]] | ||
| return value * 6; | ||
| } | ||
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| [MethodImpl(MethodImplOptions.NoInlining)] | ||
| static ulong UInt64_MultiplyWith7(ulong value) | ||
| { | ||
| // X64: mov [[REG0:[a-z]+]], [[REG1:[a-z]+]] | ||
| // X64-NEXT: shl [[REG0]], 3 | ||
| // X64-NEXT: sub [[REG0]], [[REG1]] | ||
| return value * 7; | ||
| } | ||
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| [MethodImpl(MethodImplOptions.NoInlining)] | ||
| static ulong UInt64_MultiplyWith8(ulong value) | ||
| { | ||
| // X64: mov [[REG0:[a-z]+]], [[REG1:[a-z]+]] | ||
| // X64-NEXT: shl [[REG0]], 3 | ||
| return value * 8; | ||
| } | ||
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| [MethodImpl(MethodImplOptions.NoInlining)] | ||
| static ulong UInt64_MultiplyWith9(ulong value) | ||
| { | ||
| // X64: lea [[REG0:[a-z]+]], {{\[}}[[REG1:[a-z]+]]+8*[[REG1]]{{\]}} | ||
| return value * 9; | ||
| } | ||
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| [MethodImpl(MethodImplOptions.NoInlining)] | ||
| static ulong UInt64_MultiplyWith15(ulong value) | ||
| { | ||
| // X64: mov [[REG0:[a-z]+]], [[REG1:[a-z]+]] | ||
| // X64-NEXT: shl [[REG0]], 4 | ||
| // X64-NEXT: sub [[REG0]], [[REG1]] | ||
| return value * 15; | ||
| } | ||
|
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| [MethodImpl(MethodImplOptions.NoInlining)] | ||
| static ulong UInt64_MultiplyWith16(ulong value) | ||
| { | ||
| // X64: mov [[REG0:[a-z]+]], [[REG1:[a-z]+]] | ||
| // X64-NEXT: shl [[REG0]], 4 | ||
| return value * 16; | ||
| } | ||
|
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| [MethodImpl(MethodImplOptions.NoInlining)] | ||
| static ulong UInt64_MultiplyWith17(ulong value) | ||
| { | ||
| // X64: mov [[REG0:[a-z]+]], [[REG1:[a-z]+]] | ||
| // X64-NEXT: shl [[REG0]], 4 | ||
| // X64-NEXT: add [[REG0]], [[REG1]] | ||
| return value * 17; | ||
| } | ||
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| static int Main() | ||
| { | ||
| if (UInt32_MultiplyWithUInt32MaxValue(1) != UInt32.MaxValue) | ||
| return 0; | ||
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| if (UInt64_MultiplyWithUInt32MaxValue(1) != (ulong)UInt32.MaxValue) | ||
| return 0; | ||
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| if (UInt64_MultiplyWithUInt32MaxValuePlusOne(1) != ((ulong)UInt32.MaxValue + 1)) | ||
| return 0; | ||
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| if (UInt64_MultiplyWithUInt32MaxValuePlusTwo(1) != ((ulong)UInt32.MaxValue + 2)) | ||
| return 0; | ||
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| if (UInt64_MultiplyWith2(1) != 2) | ||
| return 0; | ||
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| if (UInt64_MultiplyWith3(1) != 3) | ||
| return 0; | ||
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| if (UInt64_MultiplyWith4(1) != 4) | ||
| return 0; | ||
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| if (UInt64_MultiplyWith5(1) != 5) | ||
| return 0; | ||
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| if (UInt64_MultiplyWith6(1) != 6) | ||
| return 0; | ||
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| if (UInt64_MultiplyWith7(1) != 7) | ||
| return 0; | ||
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| if (UInt64_MultiplyWith8(1) != 8) | ||
| return 0; | ||
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| if (UInt64_MultiplyWith9(1) != 9) | ||
| return 0; | ||
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| if (UInt64_MultiplyWith15(1) != 15) | ||
| return 0; | ||
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| if (UInt64_MultiplyWith16(1) != 16) | ||
| return 0; | ||
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| if (UInt64_MultiplyWith17(1) != 17) | ||
| return 0; | ||
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| return 100; | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,17 @@ | ||
| <Project Sdk="Microsoft.NET.Sdk"> | ||
| <PropertyGroup> | ||
| <OutputType>Exe</OutputType> | ||
| </PropertyGroup> | ||
| <PropertyGroup> | ||
| <DebugType>None</DebugType> | ||
| <Optimize>True</Optimize> | ||
| </PropertyGroup> | ||
| <ItemGroup> | ||
| <Compile Include="$(MSBuildProjectName).cs"> | ||
| <HasDisasmCheck>true</HasDisasmCheck> | ||
| </Compile> | ||
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| <CLRTestEnvironmentVariable Include="COMPlus_TieredCompilation" Value="0" /> | ||
| <CLRTestEnvironmentVariable Include="COMPlus_JITMinOpts" Value="0" /> | ||
| </ItemGroup> | ||
| </Project> |