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/* $NetBSD: asm.h,v 1.3 1994/11/20 20:53:55 deraadt Exp $ */
/*
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This software was developed by the Computer Systems Engineering group
* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
* contributed to Berkeley.
*
* All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Lawrence Berkeley Laboratory.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)asm.h 8.1 (Berkeley) 6/11/93
*/
#ifndef _ASM_H_
#define _ASM_H_
/*
* GCC __asm constructs for doing assembly stuff.
*/
/*
* ``Routines'' to load and store from/to alternate address space.
* The location can be a variable, the asi value (address space indicator)
* must be a constant.
*
* N.B.: You can put as many special functions here as you like, since
* they cost no kernel space or time if they are not used.
*
* These were static inline functions, but gcc screws up the constraints
* on the address space identifiers (the "n"umeric value part) because
* it inlines too late, so we have to use the funny valued-macro syntax.
*/
#ifndef __ASSEMBLER__
/* load byte from alternate address space */
#define lduba(asi, loc) ({ \
register int _lduba_v; \
__asm __volatile("lduba [%1]%2,%0" : "=r" (_lduba_v) : \
"r" ((int)(loc)), "n" (asi)); \
_lduba_v; \
})
/* load half-word from alternate address space */
#define lduha(asi, loc) ({ \
register int _lduha_v; \
__asm __volatile("lduha [%1]%2,%0" : "=r" (_lduha_v) : \
"r" ((int)(loc)), "n" (asi)); \
_lduha_v; \
})
/* load int from alternate address space */
#define lda(asi, loc) ({ \
register int _lda_v; \
__asm __volatile("lda [%1]%2,%0" : "=r" (_lda_v) : \
"r" ((int)(loc)), "n" (asi)); \
_lda_v; \
})
/* store byte to alternate address space */
#define stba(asi, loc, value) ({ \
__asm __volatile("stba %0,[%1]%2" : : \
"r" ((int)(value)), "r" ((int)(loc)), "n" (asi)); \
})
/* store half-word to alternate address space */
#define stha(asi, loc, value) ({ \
__asm __volatile("stha %0,[%1]%2" : : \
"r" ((int)(value)), "r" ((int)(loc)), "n" (asi)); \
})
/* store int to alternate address space */
#define sta(asi, loc, value) ({ \
__asm __volatile("sta %0,[%1]%2" : : \
"r" ((int)(value)), "r" ((int)(loc)), "n" (asi)); \
})
#endif /* !__ASSEMBLER__ */
#ifdef __STDC__
#define _C_LABEL(x) _ ## x
#else
#define _C_LABEL(x) _/**/x
#endif
#define _ASM_LABEL(name) name
#ifdef PIC
/*
* PIC_PROLOGUE() is akin to the compiler generated function prologue for
* PIC code. It leaves the address of the Global Offset Table in DEST,
* clobbering register TMP in the process. Using the temporary enables us
* to work without a stack frame (doing so requires saving %o7) .
*/
#define PIC_PROLOGUE(dest,tmp) \
mov %o7,tmp; 3: call 4f; nop; 4: \
sethi %hi(__GLOBAL_OFFSET_TABLE_-(3b-.)),dest; \
or dest,%lo(__GLOBAL_OFFSET_TABLE_-(3b-.)),dest; \
add dest,%o7,dest; mov tmp,%o7
/*
* PICCY_SET() does the equivalent of a `set var, %dest' instruction in
* a PIC-like way, but without involving the Global Offset Table. This
* only works for VARs defined in the same file *and* in the text segment.
*/
#define PICCY_SET(var,dest,tmp) \
mov %o7,tmp; 3: call 4f; nop; 4: \
add %o7,(var-3b),dest; mov tmp,%o7
#else
#define PIC_PROLOGUE(dest,tmp)
#define PICCY_OFFSET(var,dest,tmp)
#endif
#define FTYPE(x) .type x,@function
#define OTYPE(x) .type x,@object
#define _ENTRY(name) \
.align 4; .globl name; .proc 1; FTYPE(name); name:
#ifdef PROF
#define _PROF_PROLOGUE \
.data; .align 4; 1: .long 0; \
.text; save %sp,-96,%sp; sethi %hi(1b),%o0; call mcount; \
or %o0,%lo(1b),%o0; restore
#else
#define _PROF_PROLOGUE
#endif
#define ENTRY(name) _ENTRY(_C_LABEL(name)); _PROF_PROLOGUE
#define ASENTRY(name) _ENTRY(_ASM_LABEL(name)); _PROF_PROLOGUE
#define FUNC(name) ASENTRY(name)
#define ASMSTR .asciz
#endif /* _ASM_H_ */
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