[PATCH v2 11/18] tests/tcg: only read/write 64 bit words on 64 bit systems

[Alex Bennée]

While the compilers will generally happily synthesise a 64 bit value
for you on 32 bit systems it doesn't exercise anything on QEMU. It
also makes it hard to accurately compare the accesses to test_data
when instrumenting.

Message-Id: <20240910140733.4007719-21-alex.bennee@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>

---
v2
  - >= test of __SIZEOF_POINTER__
---
 tests/tcg/multiarch/system/memory.c | 26 +++++++++++++++++++-------
 1 file changed, 19 insertions(+), 7 deletions(-)

diff --git a/tests/tcg/multiarch/system/memory.c 
b/tests/tcg/multiarch/system/memory.c
index 8f2371975d..28080767b2 100644
--- a/tests/tcg/multiarch/system/memory.c
+++ b/tests/tcg/multiarch/system/memory.c
@@ -163,6 +163,7 @@ static void init_test_data_u32(int offset)
     ml_printf("done %d @ %p\n", i, ptr);
 }
 
+#if __SIZEOF_POINTER__ >= 8
 static void init_test_data_u64(int offset)
 {
     uint8_t count = 0;
@@ -187,6 +188,7 @@ static void init_test_data_u64(int offset)
     }
     ml_printf("done %d @ %p\n", i, ptr);
 }
+#endif
 
 static bool read_test_data_u16(int offset)
 {
@@ -254,6 +256,7 @@ static bool read_test_data_u32(int offset)
     return true;
 }
 
+#if __SIZEOF_POINTER__ >= 8
 static bool read_test_data_u64(int offset)
 {
     uint64_t word, *ptr = (uint64_t *)&test_data[offset];
@@ -307,11 +310,16 @@ static bool read_test_data_u64(int offset)
     ml_printf("done %d @ %p\n", i, ptr);
     return true;
 }
+#endif
 
 /* Read the test data and verify at various offsets */
-read_ufn read_ufns[] = { read_test_data_u16,
-                         read_test_data_u32,
-                         read_test_data_u64 };
+read_ufn read_ufns[] = {
+    read_test_data_u16,
+    read_test_data_u32,
+#if __SIZEOF_POINTER__ >= 8
+    read_test_data_u64
+#endif
+};
 
 bool do_unsigned_reads(int start_off)
 {
@@ -476,10 +484,14 @@ bool do_signed_reads(bool neg_first)
     return ok;
 }
 
-init_ufn init_ufns[] = { init_test_data_u8,
-                         init_test_data_u16,
-                         init_test_data_u32,
-                         init_test_data_u64 };
+init_ufn init_ufns[] = {
+    init_test_data_u8,
+    init_test_data_u16,
+    init_test_data_u32,
+#if __SIZEOF_POINTER__ >= 8
+    init_test_data_u64
+#endif
+};
 
 int main(void)
 {
-- 
2.39.5