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/* Copyright (C) 2011-2015 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
The GNU C 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.
The GNU C 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 the GNU C Library. If not, see
<http://www.gnu.org/licenses/>. */
#include <sysdeps/generic/sysdep.h>
#include <bits/wordsize.h>
#include <arch/abi.h>
#if defined __ASSEMBLER__ || defined REQUEST_ASSEMBLER_MACROS
#include <feedback.h>
/* Make use of .size directive. */
#define ASM_SIZE_DIRECTIVE(name) .size name,.-name;
/* Define an entry point visible from C. */
#define ENTRY(name) \
.globl C_SYMBOL_NAME(name); \
.type C_SYMBOL_NAME(name),@function; \
.align 8; \
C_LABEL(name) \
cfi_startproc; \
CALL_MCOUNT
#undef END
#define END(name) \
cfi_endproc; \
ASM_SIZE_DIRECTIVE(name)
/* Since C identifiers are not normally prefixed with an underscore
on this system, the asm identifier `syscall_error' intrudes on the
C name space. Make sure we use an innocuous name. */
#define syscall_error __syscall_error
#define mcount __mcount
/* If compiled for profiling, call `mcount' at the start of each function.
The mcount code requires the caller PC in r10. The `mcount' function
sets lr back to the value r10 had on entry when it returns. */
#ifdef PROF
#define CALL_MCOUNT { move r10, lr; jal mcount }
#else
#define CALL_MCOUNT /* Do nothing. */
#endif
/* Local label name for asm code. */
#define L(name) .L##name
/* Specify the size in bytes of a machine register. */
#ifdef __tilegx__
#define REGSIZE 8
#else
#define REGSIZE 4
#endif
/* Support a limited form of shared assembly between tilepro and tilegx.
The presumption is that LD/ST are used for manipulating registers.
Since opcode parsing is case-insensitive, we don't need to provide
definitions for these on tilegx. */
#ifndef __tilegx__
#define LD lw
#define LD4U lw
#define ST sw
#define ST4 sw
#define BNEZ bnz
#define BEQZ bz
#define BEQZT bzt
#define BGTZ bgz
#define CMPEQI seqi
#define CMPEQ seq
#define CMOVEQZ mvz
#define CMOVNEZ mvnz
#endif
/* Provide "pointer-oriented" instruction variants. These differ not
just for tilepro vs tilegx, but also for tilegx -m64 vs -m32. */
#if defined __tilegx__ && __WORDSIZE == 32
#define ADD_PTR addx
#define ADDI_PTR addxi
#define ADDLI_PTR addxli
#define LD_PTR ld4s
#define ST_PTR st4
#define SHL_PTR_ADD shl2add
#else
#define ADD_PTR add
#define ADDI_PTR addi
#define ADDLI_PTR addli
#define LD_PTR LD
#define ST_PTR ST
#ifdef __tilegx__
#define SHL_PTR_ADD shl3add
#else
#define SHL_PTR_ADD s2a
#endif
#endif
#endif /* __ASSEMBLER__ */
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