From 041cdc2769407c4d3869b218ad7ee7638e1c306e Mon Sep 17 00:00:00 2001 From: Waldemar Brodkorb Date: Wed, 24 May 2017 20:49:02 +0200 Subject: sparc64: add basic support No NPTL, no LDSO support. Bootup with Busybox Ash in Qemu working. Testuite shows only two failures, but mksh continue/break support doesn't work. --- libc/sysdeps/linux/sparc64/fpu_control.h | 72 ++++++++++++++++++++++++++++++++ 1 file changed, 72 insertions(+) create mode 100644 libc/sysdeps/linux/sparc64/fpu_control.h (limited to 'libc/sysdeps/linux/sparc64/fpu_control.h') diff --git a/libc/sysdeps/linux/sparc64/fpu_control.h b/libc/sysdeps/linux/sparc64/fpu_control.h new file mode 100644 index 000000000..77acde925 --- /dev/null +++ b/libc/sysdeps/linux/sparc64/fpu_control.h @@ -0,0 +1,72 @@ +/* FPU control word bits. SPARC version. + Copyright (C) 1997-2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Miguel de Icaza + + 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 + . */ + +#ifndef _FPU_CONTROL_H +#define _FPU_CONTROL_H 1 + + +#include +#include + +/* masking of interrupts */ +#define _FPU_MASK_IM 0x08000000 +#define _FPU_MASK_OM 0x04000000 +#define _FPU_MASK_UM 0x02000000 +#define _FPU_MASK_ZM 0x01000000 +#define _FPU_MASK_PM 0x00800000 + +/* precision control */ +#define _FPU_EXTENDED 0x00000000 /* RECOMMENDED */ +#define _FPU_DOUBLE 0x20000000 +#define _FPU_80BIT 0x30000000 +#define _FPU_SINGLE 0x10000000 /* DO NOT USE */ + +/* rounding control / Sparc */ +#define _FPU_RC_DOWN 0xc0000000 +#define _FPU_RC_UP 0x80000000 +#define _FPU_RC_ZERO 0x40000000 +#define _FPU_RC_NEAREST 0x0 /* RECOMMENDED */ + +#define _FPU_RESERVED 0x30300000 /* Reserved bits in cw */ + + +/* Now two recommended cw */ + +/* Linux and IEEE default: + - extended precision + - rounding to nearest + - no exceptions */ +#define _FPU_DEFAULT 0x0 +#define _FPU_IEEE 0x0 + +/* Type of the control word. */ +typedef unsigned long int fpu_control_t; + +#if __WORDSIZE == 64 +# define _FPU_GETCW(cw) __asm__ __volatile__ ("stx %%fsr,%0" : "=m" (*&cw)) +# define _FPU_SETCW(cw) __asm__ __volatile__ ("ldx %0,%%fsr" : : "m" (*&cw)) +#else +# define _FPU_GETCW(cw) __asm__ __volatile__ ("st %%fsr,%0" : "=m" (*&cw)) +# define _FPU_SETCW(cw) __asm__ __volatile__ ("ld %0,%%fsr" : : "m" (*&cw)) +#endif + +/* Default control word set at startup. */ +extern fpu_control_t __fpu_control; + +#endif /* fpu_control.h */ -- cgit v1.2.3