Changeset 48627ab in mainline for libc/arch/mips32/include/stackarg.h

Timestamp:

2006-03-16T15:06:02Z (19 years ago)

Author:

Josef Cejka <malyzelenyhnus@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

11eae82

Parents:

b81e7c6

Message:

New improved version of stackargs va_start and va_arg macros for mips32.

File:

• libc/arch/mips32/include/stackarg.h (modified) (1 diff)

libc/arch/mips32/include/stackarg.h

@@ -35 +35 @@
 #include <types.h>
 
-typedef struct va_list {
-        int pos;
-        uint8_t *last;
-} va_list;
-
-#define va_start(ap, lst)               \
-        (ap).pos = sizeof(lst);         \
-        (ap).last = (uint8_t *) &(lst)
-
 /**
  * va_arg macro for MIPS32 - problem is that 64 bit values must be aligned on an 8-byte boundary (32bit values not)
  * To satisfy this, paddings must be sometimes inserted. 
  */
-#define va_arg(ap, type)                \
-        (*((type *)((ap).last + ((ap).pos  += sizeof(type) + ((sizeof(type) == 8) && (((ap).pos)&4) ? 4 : 0)) - sizeof(type))))
+
+typedef uint8_t* va_list;
+
+#define va_start(ap, lst) \
+        ((ap) = (va_list)&(lst) + sizeof(lst))
+
+#define va_arg(ap, type)        \
+        (((type *)((ap) = (va_list)( (sizeof(type) <= 4) ? ((uint32_t)((ap) + 2*4 - 1) & (~3)) : ((uint32_t)((ap) + 2*8 -1) & (~7)) )))[-1])
 
 #define va_end(ap)
 
-
-
 #endif