From fc823455f90e0c71f4022f8354a83ebcfa50a605 Mon Sep 17 00:00:00 2001
From: Alex Mykyta <amykyta3@users.noreply.github.com>
Date: Wed, 3 May 2023 23:22:05 -0700
Subject: [PATCH] Add testcase to test cumulative strobes. #38

---
 tests/test_write_buffer/tb_template.sv | 83 ++++++++++++++++++++++++++
 tests/test_write_buffer/testcase.py    |  3 +
 2 files changed, 86 insertions(+)

diff --git a/tests/test_write_buffer/tb_template.sv b/tests/test_write_buffer/tb_template.sv
index c202570..42cb159 100644
--- a/tests/test_write_buffer/tb_template.sv
+++ b/tests/test_write_buffer/tb_template.sv
@@ -216,5 +216,88 @@
     cpuif.assert_read('h2C, 'h1234);
     cpuif.assert_read('h2E, 'h4);
 
+    //--------------------------------------------------------------------------
+    // strobes
+    //--------------------------------------------------------------------------
+    // reg1
+    // reset field to known state
+    cpuif.write('h0, 'h0000);
+    cpuif.write('h2, 'h0000);
+    cpuif.write('h4, 'h0000);
+    cpuif.write('h6, 'h0000);
+    @cb;
+    cpuif.assert_read('h0, 'h0);
+    cpuif.assert_read('h2, 'h0);
+    cpuif.assert_read('h4, 'h0);
+    cpuif.assert_read('h6, 'h0);
+    assert(cb.hwif_out.reg1.f1.value == 0);
+
+    cpuif.write('h0, 'hABCD, 'hF000);
+    cpuif.write('h2, 'h1234, 'h0F00);
+    cpuif.write('h4, 'h5678, 'h00F0);
+    cpuif.write('h6, 'hEF12, 'h000F);
+    @cb;
+    cpuif.assert_read('h0, 'hA000);
+    cpuif.assert_read('h2, 'h0200);
+    cpuif.assert_read('h4, 'h0070);
+    cpuif.assert_read('h6, 'h0002);
+    assert(cb.hwif_out.reg1.f1.value == 'h0002_0070_0200_A000);
+
+    // Check that strobes are cumulative
+    cpuif.write('h0, 'h0030, 'h00F0);
+    cpuif.write('h2, 'h0070, 'h00F0);
+    cpuif.write('h4, 'h000D, 'h000F);
+    cpuif.write('h4, 'hA000, 'hF000);
+    cpuif.write('h2, 'h0008, 'h000F);
+    cpuif.write('h0, 'h0200, 'h0F00);
+    cpuif.write('h6, 'hA000, 'hF000);
+    cpuif.write('h6, 'h0F00, 'h0F00);
+    @cb;
+    cpuif.assert_read('h0, 'hA230);
+    cpuif.assert_read('h2, 'h0278);
+    cpuif.assert_read('h4, 'hA07D);
+    cpuif.assert_read('h6, 'hAF02);
+    assert(cb.hwif_out.reg1.f1.value == 'hAF02_A07D_0278_A230);
+
+    // reg1_msb0
+    // reset field to known state
+    cpuif.write('h8, 'h0000);
+    cpuif.write('hA, 'h0000);
+    cpuif.write('hC, 'h0000);
+    cpuif.write('hE, 'h0000);
+    @cb;
+    cpuif.assert_read('h8, 'h0);
+    cpuif.assert_read('hA, 'h0);
+    cpuif.assert_read('hC, 'h0);
+    cpuif.assert_read('hE, 'h0);
+    assert(cb.hwif_out.reg1_msb0.f1.value == 0);
+
+    cpuif.write('h8, 'hABCD, 'hF000);
+    cpuif.write('hA, 'h1234, 'h0F00);
+    cpuif.write('hC, 'h5678, 'h00F0);
+    cpuif.write('hE, 'hEF12, 'h000F);
+    @cb;
+    cpuif.assert_read('h8, 'hA000);
+    cpuif.assert_read('hA, 'h0200);
+    cpuif.assert_read('hC, 'h0070);
+    cpuif.assert_read('hE, 'h0002);
+    assert({<<{cb.hwif_out.reg1_msb0.f1.value}} == 'h0002_0070_0200_A000);
+
+    // Check that strobes are cumulative
+    cpuif.write('h8, 'h0030, 'h00F0);
+    cpuif.write('hA, 'h0070, 'h00F0);
+    cpuif.write('hC, 'h000D, 'h000F);
+    cpuif.write('hC, 'hA000, 'hF000);
+    cpuif.write('hA, 'h0008, 'h000F);
+    cpuif.write('h8, 'h0200, 'h0F00);
+    cpuif.write('hE, 'hA000, 'hF000);
+    cpuif.write('hE, 'h0F00, 'h0F00);
+    @cb;
+    cpuif.assert_read('h8, 'hA230);
+    cpuif.assert_read('hA, 'h0278);
+    cpuif.assert_read('hC, 'hA07D);
+    cpuif.assert_read('hE, 'hAF02);
+    assert({<<{cb.hwif_out.reg1_msb0.f1.value}} == 'hAF02_A07D_0278_A230);
+
 
 {% endblock %}
diff --git a/tests/test_write_buffer/testcase.py b/tests/test_write_buffer/testcase.py
index 835b5ef..4c1be35 100644
--- a/tests/test_write_buffer/testcase.py
+++ b/tests/test_write_buffer/testcase.py
@@ -1,5 +1,8 @@
 from ..lib.sim_testcase import SimTestCase
+from ..lib.cpuifs.passthrough import Passthrough
 
 class Test(SimTestCase):
+    cpuif = Passthrough() # test with bit strobes
+
     def test_dut(self):
         self.run_test()