mirror of
https://github.com/danbulant/Cosmos
synced 2026-05-22 13:58:47 +00:00
ad960c9a1a
- Fixed Single.ToString() on special cases (infinities, NaN and 0) and aumented the range of printable values - Fixed Double.ToString(): it always printed "Double Overrange" for a bug in opcode ldarga - Fixed opcode ldarga: the displacement of the argument variable was off of 4 bytes - Fixed opcodes shr, shr_un and shl when the shift was more that 32 bytes, added to BCL relative tests - Added BLC tests regarding BitConverter and unsafe code - Moved the meat of the code of Single.ToString() and Double.ToString() to the class StringHelper together with the analogous methods for numer types - Re-added _floatsignbit to CosmosAssembler.cs so the neg test should not fail anymore - Removed all code relative to x87 that I had left under #if false - Clean up
61 lines
1.9 KiB
C#
61 lines
1.9 KiB
C#
using System;
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using Cosmos.Assembler.x86.x87;
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using XSharp.Compiler;
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using static XSharp.Compiler.XSRegisters;
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using CPUx86 = Cosmos.Assembler.x86;
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namespace Cosmos.IL2CPU.X86.IL
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{
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[Cosmos.IL2CPU.OpCode( ILOpCode.Code.Neg )]
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public class Neg : ILOp
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{
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public Neg( Cosmos.Assembler.Assembler aAsmblr )
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: base( aAsmblr )
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{
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}
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public override void Execute( MethodInfo aMethod, ILOpCode aOpCode )
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{
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var xStackContent = aOpCode.StackPopTypes[0];
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var xStackContentSize = SizeOfType(xStackContent);
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var xStackContentIsFloat = TypeIsFloat(xStackContent);
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if (xStackContentSize > 4)
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{
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if (xStackContentIsFloat)
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{
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// There is no direct double negate instruction in SSE simply we do a XOR with 0x8000000000 to flip the sign bit
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XS.SSE2.MoveSD(XMM0, ESP, sourceIsIndirect: true);
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XS.SSE2.XorPD(XMM0, "__doublesignbit", sourceIsIndirect: true);
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XS.SSE2.MoveSD(ESP, XMM0, destinationIsIndirect: true);
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}
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else
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{
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XS.Pop(XSRegisters.EBX); // low
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XS.Pop(XSRegisters.EAX); // high
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XS.Negate(XSRegisters.EBX); // set carry if EBX != 0
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XS.AddWithCarry(XSRegisters.EAX, 0);
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XS.Negate(XSRegisters.EAX);
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XS.Push(XSRegisters.EAX);
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XS.Push(XSRegisters.EBX);
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}
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}
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else
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{
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if (xStackContentIsFloat)
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{
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// There is no direct float negate instruction in SSE simply we do a XOR with 0x80000000 to flip the sign bit
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XS.SSE.MoveSS(XMM0, ESP, sourceIsIndirect: true);
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XS.SSE.MoveSS(XMM1, "__floatsignbit", sourceIsIndirect: true);
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XS.SSE.XorPS(XMM0, XMM1);
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XS.SSE.MoveSS(ESP, XMM0, destinationIsIndirect: true);
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}
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else
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{
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XS.Pop(XSRegisters.EAX);
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XS.Negate(XSRegisters.EAX);
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XS.Push(XSRegisters.EAX);
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}
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}
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}
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}
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}
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