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Diffstat (limited to 'sysdeps/alpha/fpu/fpu_control.h')
| -rw-r--r-- | sysdeps/alpha/fpu/fpu_control.h | 106 |
1 files changed, 0 insertions, 106 deletions
diff --git a/sysdeps/alpha/fpu/fpu_control.h b/sysdeps/alpha/fpu/fpu_control.h deleted file mode 100644 index 28acdf1704..0000000000 --- a/sysdeps/alpha/fpu/fpu_control.h +++ /dev/null @@ -1,106 +0,0 @@ -/* FPU control word bits. Alpha-mapped-to-Intel version. - Copyright (C) 1996, 1998, 2000, 2002 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Olaf Flebbe. - - 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, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#ifndef _ALPHA_FPU_CONTROL_H -#define _ALPHA_FPU_CONTROL_H - -/* - * Since many programs seem to hardcode the values passed to __setfpucw() - * (rather than using the manifest constants) we emulate the x87 interface - * here (at least where this makes sense). - * - * 15-13 12 11-10 9-8 7-6 5 4 3 2 1 0 - * | reserved | IC | RC | PC | reserved | PM | UM | OM | ZM | DM | IM - * - * IM: Invalid operation mask - * DM: Denormalized operand mask - * ZM: Zero-divide mask - * OM: Overflow mask - * UM: Underflow mask - * PM: Precision (inexact result) mask - * - * Mask bit is 1 means no interrupt. - * - * PC: Precision control - * 11 - round to extended precision - * 10 - round to double precision - * 00 - round to single precision - * - * RC: Rounding control - * 00 - rounding to nearest - * 01 - rounding down (toward - infinity) - * 10 - rounding up (toward + infinity) - * 11 - rounding toward zero - * - * IC: Infinity control - * That is for 8087 and 80287 only. - * - * The hardware default is 0x037f. I choose 0x1372. - */ - -#include <features.h> - -/* masking of interrupts */ -#define _FPU_MASK_IM 0x01 -#define _FPU_MASK_DM 0x02 -#define _FPU_MASK_ZM 0x04 -#define _FPU_MASK_OM 0x08 -#define _FPU_MASK_UM 0x10 -#define _FPU_MASK_PM 0x20 - -/* precision control -- without effect on Alpha */ -#define _FPU_EXTENDED 0x300 /* RECOMMENDED */ -#define _FPU_DOUBLE 0x200 -#define _FPU_SINGLE 0x0 /* DO NOT USE */ - -/* - * rounding control---notice that on the Alpha this affects only - * instructions with the dynamic rounding mode qualifier (/d). - */ -#define _FPU_RC_NEAREST 0x000 /* RECOMMENDED */ -#define _FPU_RC_DOWN 0x400 -#define _FPU_RC_UP 0x800 -#define _FPU_RC_ZERO 0xC00 - -#define _FPU_RESERVED 0xF0C0 /* Reserved bits in cw */ - - -/* Now two recommended cw */ - -/* Linux default: - - extended precision - - rounding to positive infinity. There is no /p instruction - qualifier. By setting the dynamic rounding mode to +infinity, - one can use /d to get round to +infinity with no extra overhead - (so long as the default isn't changed, of course...) - - no exceptions enabled. */ - -#define _FPU_DEFAULT 0x137f - -/* IEEE: same as above. */ -#define _FPU_IEEE 0x137f - -/* Type of the control word. */ -typedef unsigned int fpu_control_t; - -/* Default control word set at startup. */ -extern fpu_control_t __fpu_control; - -#endif /* _ALPHA_FPU_CONTROL */ |