more lto debugging

bscottm · Jan 9, 2025 · 799e626 · 799e626
1 parent df82146
commit 799e626
Showing 1 changed file with 52 additions and 13 deletions.
diff --git a/sim_fio.c b/sim_fio.c
@@ -129,22 +129,61 @@ sim_byte_swap_data (bptr, size, count);
 
 void sim_byte_swap_data (void *bptr, size_t size, size_t count)
 {
-size_t j;
-unsigned char by, *sptr, *dptr;
+    size_t j;
+    uint8 by, *sptr, *dptr;
+
+    if (sim_end || (count == 0) || (size == sizeof (char)))
+        return;
+    sptr = (uint8 *) bptr;
+
+    for (j = 0; j < count; j++) {                           /* loop on items */
+        switch (size) {
+        case sizeof(uint16):
+#if defined(__GNUC__) || defined(__clang__)
+            *((uint16 *) sptr) = __builtin_bswap16 (*((uint16 *) sptr));
+#elif defined(_MSC_VER)
+            *((uint16 *) sptr) = _byteswap_ushort (*((uint16 *) sptr));
+#else
+            goto loser;
+#endif
+            break;
 
-if (sim_end || (count == 0) || (size == sizeof (char)))
-    return;
-dptr = sptr = (unsigned char *) bptr;
-for (j = 0; j < count; j++) {                           /* loop on items */
-    size_t k;
-    const size_t midpoint = (size + 1) / 2;
+        case sizeof(uint32):
+#if defined(__GNUC__) || defined(__clang__)
+            *((uint32 *) sptr) = __builtin_bswap32 (*((uint32 *) sptr));
+#elif defined(_MSC_VER)
+            *((uint32 *) sptr) = _byteswap_ulong (*((uint32 *) sptr));
+#else
+            goto loser;
+#endif
+            break;
+
+        case sizeof(t_uint64):
+#if defined(__GNUC__) || defined(__clang__)
+            *((t_uint64 *) sptr) = __builtin_bswap64 (*((t_uint64 *) sptr));
+#elif defined(_MSC_VER)
+            *((t_uint64 *) sptr) = _byteswap_uint64 (*((t_uint64 *) sptr));
+#else
+            goto loser;
+#endif
+            break;
 
-    for (k = size - 1; k >= midpoint; k--) {
-        by = *sptr;                                     /* swap end-for-end */
-        *sptr++ = *(dptr + k);
-        *(dptr + k) = by;
+        default:
+loser:
+            {
+                size_t k;
+                const size_t midpoint = (size + 1) / 2;
+
+                dptr = sptr + size - 1;
+                for (k = size - 1; k >= midpoint; k--) {
+                    by = *sptr;                             /* swap end-for-end */
+                    *sptr++ = *dptr;
+                    *dptr-- = by;
+                }
+            }
+            break;
         }
-    sptr = dptr = dptr + size;                          /* next item */
+        sptr += size;                                       /* next item */
     }
 }