Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 tests/tcg/m68k/packeddecimal-1.c | 41 +++++++++++++++++++++++++++++++
 tests/tcg/m68k/packeddecimal-2.c | 42 ++++++++++++++++++++++++++++++++
 tests/tcg/m68k/Makefile.target   |  4 ++-
 3 files changed, 86 insertions(+), 1 deletion(-)
 create mode 100644 tests/tcg/m68k/packeddecimal-1.c
 create mode 100644 tests/tcg/m68k/packeddecimal-2.c

diff --git a/tests/tcg/m68k/packeddecimal-1.c b/tests/tcg/m68k/packeddecimal-1.c
new file mode 100644
index 0000000000..5433acd17b
--- /dev/null
+++ b/tests/tcg/m68k/packeddecimal-1.c
@@ -0,0 +1,41 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/* Test packed decimal real conversion to long double. */
+
+#include <stdio.h>
+
+struct T {
+    unsigned int d[3];
+    long double f;
+};
+
+static const struct T tests[] = {
+    { { 0x00000001, 0x00000000, 0x00000000 }, 1.0e0l },
+    { { 0x01000001, 0x00000000, 0x00000000 }, 1.0e1l },
+    { { 0x00100001, 0x00000000, 0x00000000 }, 1.0e10l },
+    { { 0x00000000, 0x10000000, 0x00000000 }, 0.1e0l },
+    { { 0x41000001, 0x00000000, 0x00000000 }, 1.0e-1l },
+    { { 0x85000005, 0x55550000, 0x00000000 }, -5.5555e5l },
+    { { 0x09990009, 0x99999999, 0x99999999 }, 9.9999999999999999e999l },
+    { { 0x03210001, 0x23456789, 0x12345678 }, 1.2345678912345678e123l },
+    { { 0x00000000, 0x00000000, 0x00000000 }, 0.0l },
+    { { 0x80000000, 0x00000000, 0x00000000 }, -0.0l },
+    { { 0x09990000, 0x00000000, 0x00000000 }, 0.0e999l },
+};
+
+int main()
+{
+    int ret = 0;
+
+    for (int i = 0; i < sizeof(tests) / sizeof(tests[0]); i++) {
+        const struct T *t = &tests[i];
+        long double f;
+
+        asm("fmove.p (%1),%0" : "=f"(f) : "a"(t->d));
+
+        if (f != t->f) {
+            fprintf(stderr, "Mismatch at %d: %.17Le != %.17Le\n", i, f, t->f);
+            ret = 1;
+        }
+    }
+    return ret;
+}
diff --git a/tests/tcg/m68k/packeddecimal-2.c b/tests/tcg/m68k/packeddecimal-2.c
new file mode 100644
index 0000000000..3547dc7b84
--- /dev/null
+++ b/tests/tcg/m68k/packeddecimal-2.c
@@ -0,0 +1,42 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/* Test packed decimal real conversion from long double, dynamic k-factor */
+
+#include <stdio.h>
+
+struct T {
+    unsigned int d[3];
+    long double lf;
+    int kfactor;
+};
+
+static const struct T tests[] = {
+    { { 0x00000001, 0x00000000, 0x00000000 }, 1.0e0l, 0 },
+    { { 0x00100001, 0x00000000, 0x00000000 }, 1.0e10l, 0 },
+    { { 0x41000001, 0x00000000, 0x00000000 }, 1.0e-1l, 0 },
+    { { 0x85000005, 0x55550000, 0x00000000 }, -5.5555e5l, 5 },
+    { { 0x45000005, 0x55550000, 0x00000000 }, 5.5555e-5l, 5 },
+    { { 0x05000002, 0x22220000, 0x00000000 }, 2.2222e5, 99 },
+    { { 0x05000002, 0x22220000, 0x00000000 }, 2.2222e5, 5 },
+    { { 0x05000002, 0x20000000, 0x00000000 }, 2.2222e5, 2 },
+};
+
+int main()
+{
+    int ret = 0;
+
+    for (int i = 0; i < sizeof(tests) / sizeof(tests[0]); i++) {
+        const struct T *t = &tests[i];
+        unsigned int out[3];
+
+        asm("fmove.p %1,(%0),%2"
+            : : "a"(out), "f"(t->lf), "d"(t->kfactor) : "memory");
+
+        if (out[0] != t->d[0] || out[1] != t->d[1] || out[2] != t->d[2]) {
+            fprintf(stderr, "Mismatch at %d: %08x%08x%08x != %08x%08x%08x\n",
+                    i, out[0], out[1], out[2],
+                    t->d[0], t->d[1], t->d[2]);
+            ret = 1;
+        }
+    }
+    return ret;
+}
diff --git a/tests/tcg/m68k/Makefile.target b/tests/tcg/m68k/Makefile.target
index 33f7b1b127..b505260b79 100644
--- a/tests/tcg/m68k/Makefile.target
+++ b/tests/tcg/m68k/Makefile.target
@@ -4,4 +4,6 @@
 #
 
 VPATH += $(SRC_PATH)/tests/tcg/m68k
-TESTS += trap denormal
+TESTS += trap denormal packeddecimal-1 packeddecimal-2
+
+run-packeddecimal-%: QEMU_OPTS += -cpu m68020
-- 
2.43.0

On 12/8/24 02:44, Richard Henderson wrote:
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
>   tests/tcg/m68k/packeddecimal-1.c | 41 +++++++++++++++++++++++++++++++
>   tests/tcg/m68k/packeddecimal-2.c | 42 ++++++++++++++++++++++++++++++++
>   tests/tcg/m68k/Makefile.target   |  4 ++-
>   3 files changed, 86 insertions(+), 1 deletion(-)
>   create mode 100644 tests/tcg/m68k/packeddecimal-1.c
>   create mode 100644 tests/tcg/m68k/packeddecimal-2.c

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>