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1dca195e1c
Platforms with 64-bit registers where 32-bit values need to have the high 32 bits set in a particular way need to have an explicit cast when using the 64-bit sysdeps/ieee754/dbl-64/wordsize-64 version of llround() as lround(). This includes tilegx32, and likely MIPS. x32 does not need this, and AArch64 ILP32 will not either. Require it to be specified in sysdep.h to be explicit.
115 lines
3.4 KiB
C
115 lines
3.4 KiB
C
/* Copyright (C) 2011-2015 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, see
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<http://www.gnu.org/licenses/>. */
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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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#if defined __ASSEMBLER__ || defined REQUEST_ASSEMBLER_MACROS
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#include <feedback.h>
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/* Make use of .size directive. */
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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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.globl C_SYMBOL_NAME(name); \
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.type 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 tilepro 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 tilepro 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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/* On tilegx, 32-bit values must have their high 32 bits sign extended;
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random values are not allowed. */
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#define REGISTER_CAST_INT32_TO_INT64 1
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