i386mach.h

Newlib 嵌入式 C库 标准实现代码

/*  This file was based on the modified setjmp.S performed by
 *  Joel Sherill ([e-mail]) which specified the use
 *  of the __USER_LABEL_PREFIX__ and __REGISTER_PREFIX__ macros.
 **
 ** This file is distributed WITHOUT ANY WARRANTY; without even the implied
 ** warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 */

/* These are predefined by new versions of GNU cpp.  */
 
#ifndef __USER_LABEL_PREFIX__
#define __USER_LABEL_PREFIX__ _
#endif

#define __REG_PREFIX__ %
 
/* ANSI concatenation macros.  */
 
#define CONCAT1(a, b) CONCAT2(a, b)
#define CONCAT2(a, b) a##b
 
/* Use the right prefix for global labels.  */
 
#define SYM(x) CONCAT1(__USER_LABEL_PREFIX__, x)
 
/* Use the right prefix for registers.  */
 
#define REG(x) CONCAT1(__REG_PREFIX__, x)
 
#define eax REG(eax)
#define ebx REG(ebx)
#define ecx REG(ecx)
#define edx REG(edx)
#define esi REG(esi)
#define edi REG(edi)
#define ebp REG(ebp)
#define esp REG(esp)

#define st0 REG(st)
#define st1 REG(st(1))
#define st2 REG(st(2))
#define st3 REG(st(3))
#define st4 REG(st(4))
#define st5 REG(st(5))
#define st6 REG(st(6))
#define st7 REG(st(7))

#define ax REG(ax)
#define bx REG(bx)
#define cx REG(cx)
#define dx REG(dx)

#define ah REG(ah)
#define bh REG(bh)
#define ch REG(ch)
#define dh REG(dh)

#define al REG(al)
#define bl REG(bl)
#define cl REG(cl)
#define dl REG(dl)

#define mm1 REG(mm1)
#define mm2 REG(mm2)
#define mm3 REG(mm3)
#define mm4 REG(mm4)
#define mm5 REG(mm5)
#define mm6 REG(mm6)
#define mm7 REG(mm7)

#ifdef _I386MACH_NEED_SOTYPE_FUNCTION
#define SOTYPE_FUNCTION(sym) .type SYM(sym),@function
#else
#define SOTYPE_FUNCTION(sym)
#endif

#ifdef _I386MACH_ALLOW_HW_INTERRUPTS
#define        __CLI
#define        __STI
#else
#define __CLI  cli
#define __STI  sti
#endif