freedreno/ir3: Add a unit test for our disassembler.

Makes sure that we can maintain consistent output from our disassembly as
we refactor.  I've only included stuff that matches qcom's disasm so far.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4736>

2 files changed, 141 insertions, 0 deletions

diff --git a/src/freedreno/ir3/meson.build b/src/freedreno/ir3/meson.build
index a9268b04c36..5299ecad744 100644
--- a/src/freedreno/ir3/meson.build
+++ b/src/freedreno/ir3/meson.build
@@ -111,3 +111,13 @@ libfreedreno_ir3 = static_library(
   build_by_default : false,
 )
 
+test('ir3_disasm',
+  executable(
+    'ir3_disasm',
+    'tests/disasm.c',
+    link_with: libfreedreno_ir3,
+    dependencies: idep_mesautil,
+    include_directories: [inc_freedreno, inc_include, inc_src],
+  ),
+  suite: ['freedreno'],
+)
diff --git a/src/freedreno/ir3/tests/disasm.c b/src/freedreno/ir3/tests/disasm.c
new file mode 100644
index 00000000000..b6aa5ed39d5
--- /dev/null
+++ b/src/freedreno/ir3/tests/disasm.c
@@ -0,0 +1,131 @@
+/*
+ * Copyright © 2016 Broadcom
+ * Copyright © 2020 Google LLC
+ *
+ * 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 <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "util/macros.h"
+#include "instr-a3xx.h"
+
+#define INSTR_6XX(i, d) { .gpu_id = 630, .instr = #i, .expected = d }
+
+static const struct test {
+	int gpu_id;
+	const char *instr;
+	const char *expected;
+} tests[] = {
+	/* cat0 */
+	INSTR_6XX(00000000_00000000, "nop"),
+	INSTR_6XX(00000200_00000000, "(rpt2)nop"),
+	INSTR_6XX(03000000_00000000, "end"),
+	INSTR_6XX(00800000_00000004, "br p0.x, #4"),
+	INSTR_6XX(00900000_00000003, "br !p0.x, #3"),
+
+	/* cat1 */
+	INSTR_6XX(20244000_00000020, "mov.f32f32 r0.x, c8.x"),
+	INSTR_6XX(20200000_00000020, "mov.f16f16 hr0.x, hc8.x"),
+	INSTR_6XX(20150000_00000000, "cov.s32s16 hr0.x, r0.x"),
+	INSTR_6XX(20156004_00000c11, "(ul)mov.s32s32 r1.x, c<a0.x + 17>"),
+	INSTR_6XX(201100f4_00000000, "mova a0.x, hr0.x"),
+	INSTR_6XX(20244905_00000410, "(rpt1)mov.f32f32 r1.y, (r)c260.x"),
+
+	/* cat2 */
+	INSTR_6XX(40104002_0c210001, "add.f hr0.z, r0.y, c<a0.x + 33>"),
+	INSTR_6XX(40b80804_10408004, "(nop3) cmps.f.lt r1.x, (abs)r1.x, c16.x"),
+	INSTR_6XX(47308a02_00002000, "(rpt2)bary.f (ei)r0.z, (r)0, r0.x"),
+	INSTR_6XX(43480801_00008001, "(nop3) absneg.s hr0.y, (abs)hr0.y"),
+
+	/* cat3 */
+	INSTR_6XX(66000000_10421041, "sel.f16 hr0.x, hc16.y, hr0.x, hc16.z"),
+	INSTR_6XX(64848109_109a9099, "(rpt1)sel.b32 r2.y, c38.y, (r)r2.y, c38.z"),
+	INSTR_6XX(64810904_30521036, "(rpt1)sel.b32 r1.x, (r)c13.z, r0.z, (r)c20.z"),
+	INSTR_6XX(64818902_20041032, "(rpt1)sel.b32 r0.z, (r)c12.z, r0.w, (r)r1.x"),
+	INSTR_6XX(63820005_10315030, "mad.f32 r1.y, (neg)c12.x, r1.x, c12.y"),
+	INSTR_6XX(62050009_00091000, "mad.u24 r2.y, c0.x, r2.z, r2.y"),
+
+	/* cat4 */
+	INSTR_6XX(8010000a_00000003, "rcp r2.z, r0.w"),
+
+	/* cat5 */
+	INSTR_6XX(a2802f00_00000001, "getsize (u16)(xyzw)hr0.x, r0.x, t#0"),
+
+	/* cat6 */
+	INSTR_6XX(c0c00000_00000000, "stg.f16 g[hr0.x], hr0.x, hr0.x"),
+	INSTR_6XX(c1100000_c1000000, "stl.f16 l[0], hr0.x, hr48.y"),
+
+	/* discard stuff */
+	INSTR_6XX(42b400f8_20010004, "cmps.s.eq p0.x, r1.x, 1"),
+	INSTR_6XX(02800000_00000000, "kill p0.x"),
+};
+
+static void
+trim(char *string)
+{
+	for (int len = strlen(string); len > 0 && string[len - 1] == '\n'; len--)
+		string[len - 1] = 0;
+}
+
+int
+main(int argc, char **argv)
+{
+	int retval = 0;
+	const int output_size = 4096;
+	char *disasm_output = malloc(output_size);
+	FILE *fdisasm = fmemopen(disasm_output, output_size, "w+");
+	if (!fdisasm) {
+		fprintf(stderr, "failed to fmemopen\n");
+		return 1;
+	}
+
+	for (int i = 0; i < ARRAY_SIZE(tests); i++) {
+		const struct test *test = &tests[i];
+		printf("Testing a%d %s: \"%s\"...\n",
+				test->gpu_id, test->instr, test->expected);
+
+		rewind(fdisasm);
+		memset(disasm_output, 0, output_size);
+
+		uint32_t code[2] = {
+			strtoll(&test->instr[9], NULL, 16),
+			strtoll(&test->instr[0], NULL, 16),
+		};
+		disasm_a3xx(code, ARRAY_SIZE(code), 0, fdisasm, test->gpu_id);
+		fflush(fdisasm);
+
+		trim(disasm_output);
+
+		if (strcmp(disasm_output, test->expected) != 0) {
+			printf("FAIL\n");
+			printf("  Expected: \"%s\"\n", test->expected);
+			printf("  Got:      \"%s\"\n", disasm_output);
+			retval = 1;
+			continue;
+		}
+	}
+
+	fclose(fdisasm);
+	free(disasm_output);
+
+	return retval;
+}