From d471b386c19e68e5c17ac9a3a6205b016a2cbe6b Mon Sep 17 00:00:00 2001
From: Alyssa Rosenzweig <alyssa@collabora.com>
Date: Wed, 22 Jun 2022 16:36:11 -0400
Subject: [PATCH] pan/bi: Unit test swizzle lowering

We're about to extend this pass to support 8-bit swizzles. That will be a
nontrivial change, so let's get some testing for what's already in the pass.

Signed-off-by: Alyssa Rosenzweig <alyssa@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/18656>
---
 src/panfrost/bifrost/meson.build              |  1 +
 .../bifrost/test/test-lower-swizzle.cpp       | 66 +++++++++++++++++++
 2 files changed, 67 insertions(+)
 create mode 100644 src/panfrost/bifrost/test/test-lower-swizzle.cpp

diff --git a/src/panfrost/bifrost/meson.build b/src/panfrost/bifrost/meson.build
index f316c1ba3ac..e6f79ac963a 100644
--- a/src/panfrost/bifrost/meson.build
+++ b/src/panfrost/bifrost/meson.build
@@ -164,6 +164,7 @@ if with_tests
       files(
         'test/test-constant-fold.cpp',
         'test/test-dual-texture.cpp',
+        'test/test-lower-swizzle.cpp',
         'test/test-message-preload.cpp',
 	'test/test-optimizer.cpp',
 	'test/test-pack-formats.cpp',
diff --git a/src/panfrost/bifrost/test/test-lower-swizzle.cpp b/src/panfrost/bifrost/test/test-lower-swizzle.cpp
new file mode 100644
index 00000000000..20dcde5a192
--- /dev/null
+++ b/src/panfrost/bifrost/test/test-lower-swizzle.cpp
@@ -0,0 +1,66 @@
+/*
+ * Copyright (C) 2022 Collabora, Ltd.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include "compiler.h"
+#include "bi_test.h"
+#include "bi_builder.h"
+
+#include <gtest/gtest.h>
+
+#define CASE(instr, expected) INSTRUCTION_CASE(instr, expected, bi_lower_swizzle)
+#define NEGCASE(instr) CASE(instr, instr)
+
+class LowerSwizzle : public testing::Test {
+protected:
+   LowerSwizzle() {
+      mem_ctx = ralloc_context(NULL);
+
+      reg     = bi_register(0);
+      x       = bi_register(1);
+      y       = bi_register(2);
+      z       = bi_register(3);
+      w       = bi_register(4);
+   }
+
+   ~LowerSwizzle() {
+      ralloc_free(mem_ctx);
+   }
+
+   void *mem_ctx;
+
+   bi_index reg, x, y, z, w;
+};
+
+TEST_F(LowerSwizzle, Csel16)
+{
+   CASE(bi_csel_v2f16_to(b, reg, bi_half(x, 0), y, z, w, BI_CMPF_NE),
+        bi_csel_v2f16_to(b, reg, bi_swz_v2i16(b, bi_half(x, 0)), y, z, w, BI_CMPF_NE));
+}
+
+TEST_F(LowerSwizzle, Fma16)
+{
+   NEGCASE(bi_fadd_v2f16_to(b, reg, bi_half(x, 0), y));
+   NEGCASE(bi_fma_v2f16_to(b, reg, bi_half(x, 0), y, z));
+}
+
+