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121 lines
3.5 KiB
C
121 lines
3.5 KiB
C
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/* Copyright (C) 2011 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <sysdeps/generic/sysdep.h>
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#include <bits/wordsize.h>
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#include <arch/abi.h>
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#ifndef HAVE_ELF
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# error "ELF is assumed."
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#endif
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#ifndef NO_UNDERSCORES
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# error "User-label prefix (underscore) assumed absent."
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#endif
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#if defined __ASSEMBLER__ || defined REQUEST_ASSEMBLER_MACROS
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#include <feedback-asm.h>
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/* Make use of .type and .size directives. */
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#define ASM_TYPE_DIRECTIVE(name,typearg) .type name,typearg;
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#define ASM_SIZE_DIRECTIVE(name) .size name,.-name;
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/* Define an entry point visible from C. */
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#define ENTRY(name) \
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ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(name); \
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ASM_TYPE_DIRECTIVE (C_SYMBOL_NAME(name),@function) \
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.align 8; \
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C_LABEL(name) \
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cfi_startproc; \
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CALL_MCOUNT
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#undef END
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#define END(name) \
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cfi_endproc; \
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ASM_SIZE_DIRECTIVE(name)
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/* Since C identifiers are not normally prefixed with an underscore
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on this system, the asm identifier `syscall_error' intrudes on the
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C name space. Make sure we use an innocuous name. */
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#define syscall_error __syscall_error
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#define mcount __mcount
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/* If compiled for profiling, call `mcount' at the start of each function.
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The mcount code requires the caller PC in r10. The `mcount' function
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sets lr back to the value r10 had on entry when it returns. */
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#ifdef PROF
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#define CALL_MCOUNT { move r10, lr; jal mcount }
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#else
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#define CALL_MCOUNT /* Do nothing. */
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#endif
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/* Local label name for asm code. */
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#define L(name) .L##name
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/* Specify the size in bytes of a machine register. */
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#ifdef __tilegx__
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#define REGSIZE 8
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#else
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#define REGSIZE 4
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#endif
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/* Support a limited form of shared assembly between tile and tilegx.
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The presumption is that LD/ST are used for manipulating registers.
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Since opcode parsing is case-insensitive, we don't need to provide
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definitions for these on tilegx. */
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#ifndef __tilegx__
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#define LD lw
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#define LD4U lw
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#define ST sw
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#define ST4 sw
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#define BNEZ bnz
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#define BEQZ bz
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#define BEQZT bzt
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#define BGTZ bgz
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#define CMPEQI seqi
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#define CMPEQ seq
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#define CMOVEQZ mvz
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#define CMOVNEZ mvnz
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#endif
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/* Provide "pointer-oriented" instruction variants. These differ not
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just for tile vs tilegx, but also for tilegx -m64 vs -m32. */
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#if defined __tilegx__ && __WORDSIZE == 32
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#define ADD_PTR addx
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#define ADDI_PTR addxi
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#define ADDLI_PTR addxli
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#define LD_PTR ld4s
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#define ST_PTR st4
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#define SHL_PTR_ADD shl2add
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#else
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#define ADD_PTR add
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#define ADDI_PTR addi
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#define ADDLI_PTR addli
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#define LD_PTR LD
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#define ST_PTR ST
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#ifdef __tilegx__
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#define SHL_PTR_ADD shl3add
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#else
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#define SHL_PTR_ADD s2a
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#endif
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#endif
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#endif /* __ASSEMBLER__ */
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