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Improve branch operations (#1442)

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* Add Compare instruction

* Add BranchIf instruction

* Use test when BranchIf & Compare against 0

* Propagate Compare into BranchIfTrue/False use

- Propagate Compare operations into their BranchIfTrue/False use and
  turn these into a BranchIf.

- Clean up Comparison enum.

* Replace BranchIfTrue/False with BranchIf

* Use BranchIf in EmitPtPointerLoad

- Using BranchIf early instead of BranchIfTrue/False improves LCQ and
  reduces the amount of work needed by the Optimizer.

  EmitPtPointerLoader was a/the big producer of BranchIfTrue/False.

- Fix asserts firing when assembling BitwiseAnd because of type
  mismatch in EmitStoreExclusive. This is harmless and should not
  cause any diffs.

* Increment PPTC interval version

* Improve IRDumper for BranchIf & Compare

* Use BranchIf in EmitNativeCall

* Clean up

* Do not emit test when immediately preceded by and
This commit is contained in:
Ficture Seven 2020-08-05 02:52:33 +04:00 • committed by GitHub
parent a33dc2f491
commit ee22517d92
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12 changed files with 311 additions and 145 deletions
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25
ARMeilleure/CodeGen/X86/X86Condition.cs
View file

@ -1,3 +1,6 @@
using ARMeilleure.IntermediateRepresentation;
using System;
namespace ARMeilleure.CodeGen.X86
{
enum X86Condition
@ -19,4 +22,26 @@ namespace ARMeilleure.CodeGen.X86
LessOrEqual = 0xe,
Greater = 0xf
}
static class ComparisonX86Extensions
{
public static X86Condition ToX86Condition(this Comparison comp)
{
return comp switch
{
Comparison.Equal => X86Condition.Equal,
Comparison.NotEqual => X86Condition.NotEqual,
Comparison.Greater => X86Condition.Greater,
Comparison.LessOrEqual => X86Condition.LessOrEqual,
Comparison.GreaterUI => X86Condition.Above,
Comparison.LessOrEqualUI => X86Condition.BelowOrEqual,
Comparison.GreaterOrEqual => X86Condition.GreaterOrEqual,
Comparison.Less => X86Condition.Less,
Comparison.GreaterOrEqualUI => X86Condition.AboveOrEqual,
Comparison.LessUI => X86Condition.Below,
_ => throw new ArgumentException(null, nameof(comp))
};
}
}
}