/* vacall function for x86_64 CPU */
/*
* Copyright 1995-2004 Bruno Haible, <bruno@clisp.org>
*
* This is free software distributed under the GNU General Public Licence
* described in the file COPYING. Contact the author if you don't have this
* or can't live with it. There is ABSOLUTELY NO WARRANTY, explicit or implied,
* on this software.
*/
#ifndef REENTRANT
#include "vacall.h.in"
#else /* REENTRANT */
#include "vacall_r.h.in"
#endif
#ifdef REENTRANT
#define __vacall __vacall_r
register struct { void (*vacall_function) (void*,va_alist); void* arg; }
* env __asm__("r10");
#endif
register __vaword iarg1 __asm__("rdi");
register __vaword iarg2 __asm__("rsi");
register __vaword iarg3 __asm__("rdx");
register __vaword iarg4 __asm__("rcx");
register __vaword iarg5 __asm__("r8");
register __vaword iarg6 __asm__("r9");
register double farg1 __asm__("xmm0");
register double farg2 __asm__("xmm1");
register double farg3 __asm__("xmm2");
register double farg4 __asm__("xmm3");
register double farg5 __asm__("xmm4");
register double farg6 __asm__("xmm5");
register double farg7 __asm__("xmm6");
register double farg8 __asm__("xmm7");
register __vaword iret __asm__("rax");
register __vaword iret2 __asm__("rdx");
register float fret __asm__("xmm0");
register double dret __asm__("xmm0");
/*
* Tell gcc to not use the call-saved registers %rbx, %rbp.
* This ensures that the return sequence does not need to restore registers
* from the stack.
*/
register void* dummy1 __asm__("%rbx");
register void* dummy2 __asm__("%rbp");
void /* the return type is variable, not void! */
__vacall (__vaword word1, __vaword word2, __vaword word3, __vaword word4,
__vaword word5, __vaword word6,
__vaword firstword)
{
__va_alist list;
/* Move the arguments passed in registers to temp storage. */
list.iarg[0] = iarg1;
list.iarg[1] = iarg2;
list.iarg[2] = iarg3;
list.iarg[3] = iarg4;
list.iarg[4] = iarg5;
list.iarg[5] = iarg6;
list.farg[0] = farg1;
list.farg[1] = farg2;
list.farg[2] = farg3;
list.farg[3] = farg4;
list.farg[4] = farg5;
list.farg[5] = farg6;
list.farg[6] = farg7;
list.farg[7] = farg8;
/* Prepare the va_alist. */
list.flags = 0;
list.aptr = (long)&firstword;
list.raddr = (void*)0;
list.rtype = __VAvoid;
list.memiargptr = &list.iarg[0];
list.memfargptr = &list.farg[0];
/* Call vacall_function. The macros do all the rest. */
#ifndef REENTRANT
(*vacall_function) (&list);
#else /* REENTRANT */
(*env->vacall_function) (env->arg,&list);
#endif
/* Put return value into proper register. */
if (list.rtype == __VAvoid) {
} else
if (list.rtype == __VAchar) {
iret = list.tmp._char;
} else
if (list.rtype == __VAschar) {
iret = list.tmp._schar;
} else
if (list.rtype == __VAuchar) {
iret = list.tmp._uchar;
} else
if (list.rtype == __VAshort) {
iret = list.tmp._short;
} else
if (list.rtype == __VAushort) {
iret = list.tmp._ushort;
} else
if (list.rtype == __VAint) {
iret = list.tmp._int;
} else
if (list.rtype == __VAuint) {
iret = list.tmp._uint;
} else
if (list.rtype == __VAlong) {
iret = list.tmp._long;
} else
if (list.rtype == __VAulong) {
iret = list.tmp._ulong;
} else
if (list.rtype == __VAlonglong) {
iret = list.tmp._long;
} else
if (list.rtype == __VAulonglong) {
iret = list.tmp._ulong;
} else
if (list.rtype == __VAfloat) {
fret = list.tmp._float;
} else
if (list.rtype == __VAdouble) {
dret = list.tmp._double;
} else
if (list.rtype == __VAvoidp) {
iret = (long)list.tmp._ptr;
} else
if (list.rtype == __VAstruct) {
if (list.flags & __VA_PCC_STRUCT_RETURN) {
/* pcc struct return convention */
iret = (long) list.raddr;
} else {
/* normal struct return convention */
if (list.flags & __VA_REGISTER_STRUCT_RETURN) {
/* Return structs of size <= 16 in registers. */
if (list.rsize > 0 && list.rsize <= 16) {
iret = (__vaword)((unsigned char *) list.raddr)[0];
if (list.rsize >= 2)
iret |= (__vaword)((unsigned char *) list.raddr)[1] << 8;
if (list.rsize >= 3)
iret |= (__vaword)((unsigned char *) list.raddr)[2] << 16;
if (list.rsize >= 4)
iret |= (__vaword)((unsigned char *) list.raddr)[3] << 24;
if (list.rsize >= 5)
iret |= (__vaword)((unsigned char *) list.raddr)[4] << 32;
if (list.rsize >= 6)
iret |= (__vaword)((unsigned char *) list.raddr)[5] << 40;
if (list.rsize >= 7)
iret |= (__vaword)((unsigned char *) list.raddr)[6] << 48;
if (list.rsize >= 8)
iret |= (__vaword)((unsigned char *) list.raddr)[7] << 56;
if (list.rsize >= 9) {
iret2 = (__vaword)((unsigned char *) list.raddr)[8];
if (list.rsize >= 10)
iret2 |= (__vaword)((unsigned char *) list.raddr)[9] << 8;
if (list.rsize >= 11)
iret2 |= (__vaword)((unsigned char *) list.raddr)[10] << 16;
if (list.rsize >= 12)
iret2 |= (__vaword)((unsigned char *) list.raddr)[11] << 24;
if (list.rsize >= 13)
iret2 |= (__vaword)((unsigned char *) list.raddr)[12] << 32;
if (list.rsize >= 14)
iret2 |= (__vaword)((unsigned char *) list.raddr)[13] << 40;
if (list.rsize >= 15)
iret2 |= (__vaword)((unsigned char *) list.raddr)[14] << 48;
if (list.rsize >= 16)
iret2 |= (__vaword)((unsigned char *) list.raddr)[15] << 56;
}
}
}
}
}
}