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macros-x86_64.h
/* -*- mode: c++; indent-tabs-mode: nil -*- */
/*
Qore Programming Language
Copyright 2003 - 2013 David Nichols
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef _QORE_MACHINE_MACROS_H
#define _QORE_MACHINE_MACROS_H
#define STACK_DIRECTION_DOWN 1
#ifdef __GNUC__
#define HAVE_ATOMIC_MACROS
#define HAVE_CHECK_STACK_POS
// returns 1 when counter reaches zero, 0 if not
static inline int atomic_dec(volatile int *a) {
unsigned char rc;
__asm(
"lock; decl %0; sete %1"
: "=m" (*a), "=qm" (rc)
: "m" (*a) : "memory"
);
return rc != 0;
}
static inline void atomic_inc(volatile int *a) {
__asm(
"lock; incl %0"
: "=m" (*a)
);
}
static inline size_t get_stack_pos() {
size_t addr;
__asm("movq %%rsp, %0" : "=g" (addr) );
return addr;
}
#endif // #ifdef __GNUC__
#ifdef __SUNPRO_CC
#define HAVE_ATOMIC_MACROS
#define HAVE_CHECK_STACK_POS
// these routines are implemented in assembler
extern "C" int atomic_dec(volatile int *a);
extern "C" void atomic_inc(volatile int *a);
extern "C" size_t get_stack_pos();
#endif // #ifdef __SUNPRO_CC
#endif // #ifndef _QORE_MACHINE_MACROS_H