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arm64: Add float/double cast optimisation tests #129517

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5ac12bf
arm64: Add float/double cast optimisation tests
jonathandavies-arm Jun 17, 2026
1c415a0
Check for any cmp instruction in SVE predicate tests
jonathandavies-arm Jun 24, 2026
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182 changes: 182 additions & 0 deletions src/tests/JIT/opt/SVE/PredicateInstructions.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -11,6 +11,9 @@

public class PredicateInstructions
{
private static readonly float[] s_floatValues = new float[64];
private static readonly double[] s_doubleValues = new double[64];

[MethodImpl(MethodImplOptions.NoInlining)]
[Fact]
public static void TestPredicateInstructions()
Expand Down Expand Up @@ -40,6 +43,17 @@ public static void TestPredicateInstructions()
UnzipEvenZipLowMask(vecs, vecs);
TransposeEvenAndMask(vecs, vecs, vecs);

PredicateCastFloatLoad(s_floatValues, 0, s_floatValues.Length);
PredicateCastFloatLocalLoad(s_floatValues, 0, s_floatValues.Length);
PointerCastFloatLoad(s_floatValues, 0, s_floatValues.Length);
WhileLessThanSingleFloatLoad(s_floatValues, 0, s_floatValues.Length);
PredicateCastFloatLoop(s_floatValues, s_floatValues, s_floatValues.Length);

PredicateCastDoubleLoad(s_doubleValues, 0, s_doubleValues.Length);
PredicateCastDoubleLocalLoad(s_doubleValues, 0, s_doubleValues.Length);
PointerCastDoubleLoad(s_doubleValues, 0, s_doubleValues.Length);
WhileLessThanDoubleLoad(s_doubleValues, 0, s_doubleValues.Length);
PredicateCastDoubleLoop(s_doubleValues, s_doubleValues, s_doubleValues.Length);
}
}

Expand Down Expand Up @@ -179,4 +193,172 @@ static Vector<short> TransposeEvenAndMask(Vector<short> v, Vector<short> a, Vect
Sve.And(Sve.CompareGreaterThan(a, b), Sve.CompareEqual(a, b)),
Sve.CompareLessThan(a, b)));
}

[MethodImpl(MethodImplOptions.NoInlining)]
static unsafe Vector<float> PredicateCastFloatLoad(float[] values, int index, int length)
{
//ARM64-FULL-LINE: whilelt {{p[0-9]+}}.s, {{w[0-9]+}}, {{w[0-9]+}}
//ARM64-NOT: mov {{z[0-9]+}}.s, {{p[0-9]+}}/z, #1
//ARM64-NOT: {{^ *}}cmp
//ARM64-FULL-LINE: ld1w { {{z[0-9]+}}.s }, {{p[0-9]+}}/z, [{{x[0-9]+}}]
fixed (float* ptr = values)
{
Vector<uint> mask = Sve.CreateWhileLessThanMaskUInt32(index, length);
return Sve.LoadVector((Vector<float>)mask, ptr + index);
}
}

[MethodImpl(MethodImplOptions.NoInlining)]
static unsafe Vector<float> PointerCastFloatLoad(float[] values, int index, int length)
{
//ARM64-FULL-LINE: whilelt {{p[0-9]+}}.s, {{w[0-9]+}}, {{w[0-9]+}}
//ARM64-NOT: mov {{z[0-9]+}}.s, {{p[0-9]+}}/z, #1
//ARM64-NOT: {{^ *}}cmp
//ARM64-FULL-LINE: ld1w { {{z[0-9]+}}.s }, {{p[0-9]+}}/z, [{{x[0-9]+}}]
fixed (float* ptr = values)
{
Vector<uint> mask = Sve.CreateWhileLessThanMaskUInt32(index, length);
return (Vector<float>)Sve.LoadVector(mask, (uint*)(ptr + index));
}
}

[MethodImpl(MethodImplOptions.NoInlining)]
static unsafe Vector<float> PredicateCastFloatLocalLoad(float[] values, int index, int length)
{
//ARM64-FULL-LINE: whilelt {{p[0-9]+}}.s, {{w[0-9]+}}, {{w[0-9]+}}
//ARM64-NOT: mov {{z[0-9]+}}.s, {{p[0-9]+}}/z, #1
//ARM64-NOT: {{^ *}}cmp
//ARM64-FULL-LINE: ld1w { {{z[0-9]+}}.s }, {{p[0-9]+}}/z, [{{x[0-9]+}}]
fixed (float* ptr = values)
{
Vector<uint> uintMask = Sve.CreateWhileLessThanMaskUInt32(index, length);
Vector<float> floatMask = (Vector<float>)uintMask;
return Sve.LoadVector(floatMask, ptr + index);
}
}

[MethodImpl(MethodImplOptions.NoInlining)]
static unsafe Vector<float> WhileLessThanSingleFloatLoad(float[] values, int index, int length)
{
//ARM64-FULL-LINE: whilelt {{p[0-9]+}}.s, {{w[0-9]+}}, {{w[0-9]+}}
//ARM64-NOT: mov {{z[0-9]+}}.s, {{p[0-9]+}}/z, #1
//ARM64-NOT: {{^ *}}cmp
//ARM64-FULL-LINE: ld1w { {{z[0-9]+}}.s }, {{p[0-9]+}}/z, [{{x[0-9]+}}]
fixed (float* ptr = values)
{
Vector<float> mask = Sve.CreateWhileLessThanMaskSingle(index, length);
return Sve.LoadVector(mask, ptr + index);
}
}

[MethodImpl(MethodImplOptions.NoInlining)]
static unsafe void PredicateCastFloatLoop(float[] input, float[] output, int length)
{
//ARM64-FULL-LINE: whilelt {{p[0-9]+}}.s, {{w[0-9]+}}, {{w[0-9]+}}
//ARM64-NOT: mov {{z[0-9]+}}.s, {{p[0-9]+}}/z, #1
//ARM64-NOT: {{^ *}}cmp
//ARM64-FULL-LINE: ld1w { {{z[0-9]+}}.s }, {{p[0-9]+}}/z, [{{x[0-9]+}}]
//ARM64-NOT: mov {{z[0-9]+}}.s, {{p[0-9]+}}/z, #1
//ARM64-NOT: {{^ *}}cmp
//ARM64-FULL-LINE: st1w { {{z[0-9]+}}.s }, {{p[0-9]+}}, [{{x[0-9]+}}]
fixed (float* inputPtr = input, outputPtr = output)
{
int i = 0;
int count = (int)Sve.Count32BitElements();

while (i < length)
{
Vector<uint> loopMask = Sve.CreateWhileLessThanMaskUInt32(i, length);
Vector<float> floatMask = (Vector<float>)loopMask;
Vector<float> value = Sve.LoadVector(floatMask, inputPtr + i);
Sve.StoreAndZip(floatMask, outputPtr + i, value);

i += count;
}
}
}

[MethodImpl(MethodImplOptions.NoInlining)]
static unsafe Vector<double> PredicateCastDoubleLoad(double[] values, int index, int length)
{
//ARM64-FULL-LINE: whilelt {{p[0-9]+}}.d, {{w[0-9]+}}, {{w[0-9]+}}
//ARM64-NOT: mov {{z[0-9]+}}.d, {{p[0-9]+}}/z, #1
//ARM64-NOT: {{^ *}}cmp
//ARM64-FULL-LINE: ld1d { {{z[0-9]+}}.d }, {{p[0-9]+}}/z, [{{x[0-9]+}}]
fixed (double* ptr = values)
{
Vector<ulong> mask = Sve.CreateWhileLessThanMaskUInt64(index, length);
return Sve.LoadVector((Vector<double>)mask, ptr + index);
}
}

[MethodImpl(MethodImplOptions.NoInlining)]
static unsafe Vector<double> PointerCastDoubleLoad(double[] values, int index, int length)
{
//ARM64-FULL-LINE: whilelt {{p[0-9]+}}.d, {{w[0-9]+}}, {{w[0-9]+}}
//ARM64-NOT: mov {{z[0-9]+}}.d, {{p[0-9]+}}/z, #1
//ARM64-NOT: {{^ *}}cmp
//ARM64-FULL-LINE: ld1d { {{z[0-9]+}}.d }, {{p[0-9]+}}/z, [{{x[0-9]+}}]
fixed (double* ptr = values)
{
Vector<ulong> mask = Sve.CreateWhileLessThanMaskUInt64(index, length);
return (Vector<double>)Sve.LoadVector(mask, (ulong*)(ptr + index));
}
}

[MethodImpl(MethodImplOptions.NoInlining)]
static unsafe Vector<double> PredicateCastDoubleLocalLoad(double[] values, int index, int length)
{
//ARM64-FULL-LINE: whilelt {{p[0-9]+}}.d, {{w[0-9]+}}, {{w[0-9]+}}
//ARM64-NOT: mov {{z[0-9]+}}.d, {{p[0-9]+}}/z, #1
//ARM64-NOT: {{^ *}}cmp
//ARM64-FULL-LINE: ld1d { {{z[0-9]+}}.d }, {{p[0-9]+}}/z, [{{x[0-9]+}}]
fixed (double* ptr = values)
{
Vector<ulong> ulongMask = Sve.CreateWhileLessThanMaskUInt64(index, length);
Vector<double> doubleMask = (Vector<double>)ulongMask;
return Sve.LoadVector(doubleMask, ptr + index);
}
}

[MethodImpl(MethodImplOptions.NoInlining)]
static unsafe Vector<double> WhileLessThanDoubleLoad(double[] values, int index, int length)
{
//ARM64-FULL-LINE: whilelt {{p[0-9]+}}.d, {{w[0-9]+}}, {{w[0-9]+}}
//ARM64-NOT: mov {{z[0-9]+}}.d, {{p[0-9]+}}/z, #1
//ARM64-NOT: {{^ *}}cmp
//ARM64-FULL-LINE: ld1d { {{z[0-9]+}}.d }, {{p[0-9]+}}/z, [{{x[0-9]+}}]
fixed (double* ptr = values)
{
Vector<double> mask = Sve.CreateWhileLessThanMaskDouble(index, length);
return Sve.LoadVector(mask, ptr + index);
}
}

[MethodImpl(MethodImplOptions.NoInlining)]
static unsafe void PredicateCastDoubleLoop(double[] input, double[] output, int length)
{
//ARM64-FULL-LINE: whilelt {{p[0-9]+}}.d, {{w[0-9]+}}, {{w[0-9]+}}
//ARM64-NOT: mov {{z[0-9]+}}.d, {{p[0-9]+}}/z, #1
//ARM64-NOT: {{^ *}}cmp
//ARM64-FULL-LINE: ld1d { {{z[0-9]+}}.d }, {{p[0-9]+}}/z, [{{x[0-9]+}}]
//ARM64-NOT: mov {{z[0-9]+}}.d, {{p[0-9]+}}/z, #1
//ARM64-NOT: {{^ *}}cmp
//ARM64-FULL-LINE: st1d { {{z[0-9]+}}.d }, {{p[0-9]+}}, [{{x[0-9]+}}]
fixed (double* inputPtr = input, outputPtr = output)
{
int i = 0;
int count = (int)Sve.Count64BitElements();

while (i < length)
{
Vector<ulong> loopMask = Sve.CreateWhileLessThanMaskUInt64(i, length);
Vector<double> doubleMask = (Vector<double>)loopMask;
Vector<double> value = Sve.LoadVector(doubleMask, inputPtr + i);
Sve.StoreAndZip(doubleMask, outputPtr + i, value);

i += count;
}
}
}
}