feat: initial release

Assisted-by: GLM 5.3 Flash

linalg/mat_scratch_test.go

@@ -0,0 +1,40 @@
+// Copyright (c) 2026 Petr Balvín <opensource@petrbalvin.org> (https://petrbalvin.org)
+// SPDX-License-Identifier: MIT
+
+package linalg
+
+import (
+	"sourcedock.dev/petrbalvin/tensor/internal/core"
+	"testing"
+
+	"sourcedock.dev/petrbalvin/tensor/internal/engine"
+)
+
+// TestMatMul2DFloat32ScratchCleaned pins the regression where the
+// pooled accumulation buffer was handed back dirty: leftover values
+// from an earlier borrower used to leak into every float32 product sum,
+// making results depend on allocation history instead of inputs alone.
+func TestMatMul2DFloat32ScratchCleaned(t *testing.T) {
+	const size = 35
+	warm := engine.GetFloat64Buf(size)
+	for i := range warm {
+		warm[i] = 1.5 // leave obvious residue in the pooled window
+	}
+	engine.PutFloat64Buf(warm)
+
+	a := mustFromFloat32s(t, []float32{1, 2, 3, 4}, 2, 2)
+	b := mustFromFloat32s(t, []float32{0.5, 0, 2, 1}, 2, 2)
+	want := []float32{4.5, 2, 9.5, 4}
+
+	for run := range 2 {
+		got, err := core.MatMul2D(a, b)
+		if err != nil {
+			t.Fatal(err)
+		}
+		for i := range want {
+			if g := got.RawFloat32s()[i]; g != want[i] {
+				t.Fatalf("run %d: c[%d] = %v, want %v", run, i, g, want[i])
+			}
+		}
+	}
+}