feat: add a unit test to avoid forgetting about mixed dt with q8/fp a…

…nd relu operator

harness/nnef-test-cases/relu_quant/expected/graph.nnef

@@ -0,0 +1,17 @@
+version 1.0;
+
+extension tract_registry tract_core;
+
+fragment tract_core_properties(
+) -> (properties: (string, tensor<scalar>)[])
+{
+  properties = [("tract_nnef_ser_version", "0.21.2-pre"), ("tract_nnef_format_version", "beta1")];
+}
+
+graph network(input) -> (output) {
+  input = external(shape = [2, 1, 3]);
+  output_relu_y_3 = variable<scalar>(label = "output_relu_y_3", shape = [1, 1, 1]);
+  output_raw = max(input, output_relu_y_3);
+  foo = tract_core_cast(output_raw, to = "u8");
+  output = foo;
+}

harness/nnef-test-cases/relu_quant/expected/graph.quant

@@ -0,0 +1,4 @@
+"foo": zero_point_linear_quantize(zero_point = 2, scale = 0.003906250, bits = 8, signed = false, symmetric = false);
+"input": zero_point_linear_quantize(zero_point = 128, scale = 0.007812500, bits = 8, signed = false, symmetric = false);
+"output_raw": zero_point_linear_quantize(zero_point = 128, scale = 0.007812500, bits = 8, signed = false, symmetric = false);
+"output_relu_y_3": zero_point_linear_quantize(zero_point = 128, scale = 0.007812500, bits = 8, signed = false, symmetric = false);

harness/nnef-test-cases/relu_quant/model/graph.nnef

@@ -0,0 +1,7 @@
+version 1.0;
+
+graph softmax_quant(input) -> (output)
+{
+    input = external<scalar>(shape = [2, 1, 3]);
+    output = relu(input);
+}

harness/nnef-test-cases/relu_quant/model/graph.quant

@@ -0,0 +1,2 @@
+"input": zero_point_linear_quantize(zero_point = 128, scale = 0.0078125, bits = 8, signed = false, symmetric = false);
+"output": zero_point_linear_quantize(zero_point = 2, scale = 0.00390625, bits = 8, signed = false, symmetric = false);

harness/nnef-test-cases/relu_quant/runme.sh

@@ -0,0 +1,14 @@
+#!/bin/sh
+
+cd $(dirname $0)
+set -ex
+
+: ${TRACT_RUN:=cargo run -p tract $CARGO_OPTS --}
+
+rm -rf found
+$TRACT_RUN --nnef-tract-core ./model dump -q --nnef-dir found
+
+version=$(cargo metadata --format-version 1 | jq -r '.packages | map(select( (.name) == "tract-core") | .version) | .[] ')
+perl -pi -e "s/$version/0.21.2-pre/" found/graph.nnef
+
+diff expected found