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Diffstat (limited to 'sys/gnu/i386/fpemul/fpu_emu.h')
| -rw-r--r-- | sys/gnu/i386/fpemul/fpu_emu.h | 188 |
1 files changed, 0 insertions, 188 deletions
diff --git a/sys/gnu/i386/fpemul/fpu_emu.h b/sys/gnu/i386/fpemul/fpu_emu.h deleted file mode 100644 index 0dd2f7e..0000000 --- a/sys/gnu/i386/fpemul/fpu_emu.h +++ /dev/null @@ -1,188 +0,0 @@ -/* - * fpu_emu.h - * - * - * Copyright (C) 1992,1993,1994 - * W. Metzenthen, 22 Parker St, Ormond, Vic 3163, - * Australia. E-mail billm@vaxc.cc.monash.edu.au - * All rights reserved. - * - * This copyright notice covers the redistribution and use of the - * FPU emulator developed by W. Metzenthen. It covers only its use - * in the 386BSD, FreeBSD and NetBSD operating systems. Any other - * use is not permitted under this copyright. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must include information specifying - * that source code for the emulator is freely available and include - * either: - * a) an offer to provide the source code for a nominal distribution - * fee, or - * b) list at least two alternative methods whereby the source - * can be obtained, e.g. a publically accessible bulletin board - * and an anonymous ftp site from which the software can be - * downloaded. - * 3. All advertising materials specifically mentioning features or use of - * this emulator must acknowledge that it was developed by W. Metzenthen. - * 4. The name of W. Metzenthen may not be used to endorse or promote - * products derived from this software without specific prior written - * permission. - * - * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, - * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY - * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL - * W. METZENTHEN BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, - * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, - * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR - * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF - * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING - * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS - * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - * - * - * The purpose of this copyright, based upon the Berkeley copyright, is to - * ensure that the covered software remains freely available to everyone. - * - * The software (with necessary differences) is also available, but under - * the terms of the GNU copyleft, for the Linux operating system and for - * the djgpp ms-dos extender. - * - * W. Metzenthen June 1994. - * - * - * $FreeBSD$ - * - */ - - -#ifndef _FPU_EMU_H_ -#define _FPU_EMU_H_ - -/* - * Define DENORM_OPERAND to make the emulator detect denormals - * and use the denormal flag of the status word. Note: this only - * affects the flag and corresponding interrupt, the emulator - * will always generate denormals and operate upon them as required. - */ -#define DENORM_OPERAND - -/* - * Define PECULIAR_486 to get a closer approximation to 80486 behaviour, - * rather than behaviour which appears to be cleaner. - * This is a matter of opinion: for all I know, the 80486 may simply - * be complying with the IEEE spec. Maybe one day I'll get to see the - * spec... - */ -#define PECULIAR_486 - -#ifdef LOCORE -#include <gnu/i386/fpemul/fpu_asm.h> -#define Const(x) $/**/x -#else -#define Const(x) x -#endif - -#define EXP_BIAS Const(0) -#define EXP_OVER Const(0x4000) /* smallest invalid large exponent */ -#define EXP_UNDER Const(-0x3fff) /* largest invalid small exponent */ - -#define SIGN_POS Const(0) -#define SIGN_NEG Const(1) - -/* Keep the order TW_Valid, TW_Zero, TW_Denormal */ -#define TW_Valid Const(0)/* valid */ -#define TW_Zero Const(1)/* zero */ -/* The following fold to 2 (Special) in the Tag Word */ -#define TW_Denormal Const(4)/* De-normal */ -#define TW_Infinity Const(5)/* + or - infinity */ -#define TW_NaN Const(6)/* Not a Number */ - -#define TW_Empty Const(7)/* empty */ - - /* #define TW_FPU_Interrupt Const(0x80) *//* Signals an interrupt */ - - -#ifndef LOCORE - -#include <sys/types.h> -#include <gnu/i386/fpemul/math_emu.h> - -#ifdef PARANOID -extern char emulating; -#define REENTRANT_CHECK(state) emulating = (state) -#define ON 1 -#define OFF 0 -#else -#define REENTRANT_CHECK(state) -#endif /* PARANOID */ - -typedef void (*FUNC) (void); -typedef struct fpu_reg FPU_REG; - -#define st(x) ( regs[((top+x) &7 )] ) - -#define STACK_OVERFLOW (st_new_ptr = &st(-1), st_new_ptr->tag != TW_Empty) -#define NOT_EMPTY(i) (st(i).tag != TW_Empty) -#define NOT_EMPTY_0 (FPU_st0_tag ^ TW_Empty) - -extern unsigned char FPU_rm; - -extern char FPU_st0_tag; -extern FPU_REG *FPU_st0_ptr; - -extern void *FPU_data_address; - -extern FPU_REG FPU_loaded_data; - -#define pop() { FPU_st0_ptr->tag = TW_Empty; top++; } - -/* push() does not affect the tags */ -#define push() { top--; FPU_st0_ptr = st_new_ptr; } - - -#define reg_move(x, y) { \ - *(short *)&((y)->sign) = *(short *)&((x)->sign); \ - *(long *)&((y)->exp) = *(long *)&((x)->exp); \ - *(long long *)&((y)->sigl) = *(long long *)&((x)->sigl); } - - -/*----- Prototypes for functions written in assembler -----*/ -/* extern void reg_move(FPU_REG *a, FPU_REG *b); */ - -extern void mul64(long long *a, long long *b, long long *result); -extern void poly_div2(long long *x); -extern void poly_div4(long long *x); -extern void poly_div16(long long *x); -extern void -polynomial(unsigned accum[], unsigned x[], - unsigned short terms[][4], int n); - extern void normalize(FPU_REG * x); - extern void normalize_nuo(FPU_REG * x); - extern void reg_div(FPU_REG * arg1, FPU_REG * arg2, FPU_REG * answ, - unsigned int control_w); - extern void reg_u_sub(FPU_REG * arg1, FPU_REG * arg2, FPU_REG * answ, - unsigned int control_w); - extern void reg_u_mul(FPU_REG * arg1, FPU_REG * arg2, FPU_REG * answ, - unsigned int control_w); - extern void reg_u_div(FPU_REG * arg1, FPU_REG * arg2, FPU_REG * answ, - unsigned int control_w); - extern void reg_u_add(FPU_REG * arg1, FPU_REG * arg2, FPU_REG * answ, - unsigned int control_w); - extern void wm_sqrt(FPU_REG * n, unsigned int control_w); - extern unsigned shrx(void *l, unsigned x); - extern unsigned shrxs(void *v, unsigned x); - extern unsigned long div_small(unsigned long long *x, unsigned long y); - extern void round_reg(FPU_REG * arg, unsigned int extent, - unsigned int control_w); - -#ifndef MAKING_PROTO -#include <gnu/i386/fpemul/fpu_proto.h> -#endif - -#endif /* LOCORE */ - -#endif /* _FPU_EMU_H_ */ |
