Test CLO, CLZ and bitswap.
Signed-off-by: Philippe Mathieu-Daudé <[email protected]>
---
tests/tcg/mipsel/test_mips32r6_bitops.c | 82 +++++++++++++++++++++++++
tests/tcg/mipsel/meson.build | 1 +
2 files changed, 83 insertions(+)
create mode 100644 tests/tcg/mipsel/test_mips32r6_bitops.c
diff --git a/tests/tcg/mipsel/test_mips32r6_bitops.c
b/tests/tcg/mipsel/test_mips32r6_bitops.c
new file mode 100644
index 000000000000..dc55530b3b18
--- /dev/null
+++ b/tests/tcg/mipsel/test_mips32r6_bitops.c
@@ -0,0 +1,82 @@
+/*
+ * MIPS32R6 tests: bit operations instructions
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include <stdio.h>
+#include <stdint.h>
+
+#include "../mips/include/wrappers_mips32r6.h"
+#include "../mips/include/test_inputs_32.h"
+
+typedef void (*unary_op_32)(const uint32_t *, uint32_t *);
+typedef uint32_t (*ref_op_32)(uint32_t);
+
+static uint32_t ref_clz(uint32_t a) { return a ? __builtin_clz(a) : 32; }
+static uint32_t ref_clo(uint32_t a) { return ref_clz(~a); }
+
+/* BITSWAP reverses the bit order inside each byte. */
+static uint32_t ref_bitswap(uint32_t a)
+{
+ uint32_t res = 0;
+
+ for (int byte = 0; byte < 4; byte++) {
+ for (int bit = 0; bit < 8; bit++) {
+ if (a & (1u << (byte * 8 + bit))) {
+ res |= 1u << (byte * 8 + 7 - bit);
+ }
+ }
+ }
+ return res;
+}
+
+static int check_all(const char *name, unary_op_32 op, ref_op_32 ref,
+ const uint32_t *input, size_t count)
+{
+ int fail = 0;
+
+ for (size_t i = 0; i < count; i++) {
+ uint32_t a = input[i], res = 0;
+
+ op(&a, &res);
+ if (res != ref(a)) {
+ printf("# %s: %08x: got %08x expected %08x\n",
+ name, a, res, ref(a));
+ fail = 1;
+ }
+ }
+ return fail;
+}
+
+static int run(const char *name, unary_op_32 op, ref_op_32 ref)
+{
+ static int count;
+ int ret = 0;
+
+ ret |= check_all(name, op, ref, b32_pattern, PATTERN_INPUTS_32_COUNT);
+ ret |= check_all(name, op, ref, b32_random, RANDOM_INPUTS_32_COUNT);
+ /* Every leading-run length, for both polarities. */
+ for (int n = 0; n < 32; n++) {
+ uint32_t v[2] = { 0xffffffffu >> n, ~(0xffffffffu >> n) };
+
+ ret |= check_all(name, op, ref, v, 2);
+ v[0] = 1u << n;
+ v[1] = ~(1u << n);
+ ret |= check_all(name, op, ref, v, 2);
+ }
+ printf("%s %d - MIPS32R6 bitops %s\n", ret ? "not ok" : "ok", ++count,
name);
+ return ret;
+}
+
+int main(void)
+{
+ int ret = 0;
+
+ printf("TAP version 14\n1..3\n");
+ ret |= run("CLO", do_mips32r6_CLO, ref_clo);
+ ret |= run("CLZ", do_mips32r6_CLZ, ref_clz);
+ ret |= run("BITSWAP", do_mips32r6_BITSWAP, ref_bitswap);
+
+ return ret ? 1 : 0;
+}
diff --git a/tests/tcg/mipsel/meson.build b/tests/tcg/mipsel/meson.build
index 7a6dff32cbf4..837b26698e06 100644
--- a/tests/tcg/mipsel/meson.build
+++ b/tests/tcg/mipsel/meson.build
@@ -88,6 +88,7 @@ endif
tests = []
tests_mips32r6 = [
+ 'test_mips32r6_bitops.c',
'test_mips32r6_logic.c',
'test_mips32r6_shift.c',
]
--
2.55.0
