// VCVT: convert vector elements (32-bit) between floating-point and fixed point
public static void Vcvt_V2(ArmEmitterContext context)
{
OpCode32SimdCvtFFixed op = (OpCode32SimdCvtFFixed)context.CurrOp;
var toFixed = op.Opc == 1;
int fracBits = op.Fbits;
var unsigned = op.U; // Sign of I32 (destination/source)
if (toFixed) // F32 to S32 or U32 (fixed)
{
EmitVectorUnaryOpF32(context, (op1) =>
{
var a = context.Multiply(op1, ConstF(MathF.Pow(2f, fracBits)));
var rounded = EmitUnaryMathCall(context, nameof(MathF.Truncate), a);
MethodInfo info = unsigned ? typeof(SoftFallback).GetMethod(nameof(SoftFallback.SatF32ToU32)) : typeof(SoftFallback).GetMethod(nameof(SoftFallback.SatF32ToS32));
return(context.Call(info, rounded));
});
}
else // S32 or U32 (fixed) to F32
{
EmitVectorUnaryOpI32(context, (op1) =>
{
var f = unsigned ? context.ConvertToFPUI(OperandType.FP32, op1) : context.ConvertToFP(OperandType.FP32, op1);
return(context.Multiply(f, ConstF(1f / MathF.Pow(2f, fracBits))));
}, !unsigned);
}
}
private static Operand EmitFPConvert(ArmEmitterContext context, Operand value, OperandType type, bool signed)
{
Debug.Assert(value.Type == OperandType.I32 || value.Type == OperandType.I64);
if (signed)
{
return(context.ConvertToFP(type, value));
}
else
{
return(context.ConvertToFPUI(type, value));
}
}
private static Operand EmitFPConvert(ArmEmitterContext context, Operand value, int size, bool signed)
{
Debug.Assert(value.Type == OperandType.I32 || value.Type == OperandType.I64);
Debug.Assert((uint)size < 2);
OperandType type = size == 0 ? OperandType.FP32 : OperandType.FP64;
if (signed)
{
return(context.ConvertToFP(type, value));
}
else
{
return(context.ConvertToFPUI(type, value));
}
}