62 lines
1.6 KiB
C
62 lines
1.6 KiB
C
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/* varargs.h for SPUR */
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/* NB. This is NOT the definition needed for the new ANSI proposed
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standard */
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struct __va_struct { char __regs[20]; };
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#define va_alist __va_regs, __va_stack
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/* In GCC version 2, we want an ellipsis at the end of the declaration
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of the argument list. GCC version 1 can't parse it. */
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#if __GNUC__ > 1
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#define __va_ellipsis ...
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#else
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#define __va_ellipsis
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#endif
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/* The ... causes current_function_varargs to be set in cc1. */
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#define va_dcl struct __va_struct __va_regs; int __va_stack;
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typedef struct {
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int __pnt;
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char *__regs;
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char *__stack;
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} va_list;
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#define va_start(pvar) \
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((pvar).__pnt = 0, (pvar).__regs = __va_regs.__regs, \
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(pvar).__stack = (char *) &__va_stack)
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#define va_end(pvar) ((void)0)
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/* Avoid errors if compiling GCC v2 with GCC v1. */
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#if __GNUC__ == 1
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#define __extension__
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#endif
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#define va_arg(pvar,type) \
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__extension__ \
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(*({ type *__va_result; \
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if ((pvar).__pnt >= 20) { \
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__va_result = ( (type *) ((pvar).__stack + (pvar).__pnt - 20)); \
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(pvar).__pnt += (sizeof(type) + 7) & ~7; \
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} \
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else if ((pvar).__pnt + sizeof(type) > 20) { \
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__va_result = (type *) (pvar).__stack; \
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(pvar).__pnt = 20 + ( (sizeof(type) + 7) & ~7); \
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} \
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else if (sizeof(type) == 8) { \
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union {double d; int i[2];} __u; \
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__u.i[0] = *(int *) ((pvar).__regs + (pvar).__pnt); \
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__u.i[1] = *(int *) ((pvar).__regs + (pvar).__pnt + 4); \
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__va_result = (type *) &__u; \
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(pvar).__pnt += 8; \
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} \
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else { \
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__va_result = (type *) ((pvar).__regs + (pvar).__pnt); \
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(pvar).__pnt += (sizeof(type) + 3) & ~3; \
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} \
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__va_result; }))
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