diff options
Diffstat (limited to 'arch/i386/math-emu/fpu_emu.h')
| -rw-r--r-- | arch/i386/math-emu/fpu_emu.h | 218 |
1 files changed, 0 insertions, 218 deletions
diff --git a/arch/i386/math-emu/fpu_emu.h b/arch/i386/math-emu/fpu_emu.h deleted file mode 100644 index 65120f5..0000000 --- a/arch/i386/math-emu/fpu_emu.h +++ /dev/null @@ -1,218 +0,0 @@ -/*---------------------------------------------------------------------------+ - | fpu_emu.h | - | | - | Copyright (C) 1992,1993,1994,1997 | - | W. Metzenthen, 22 Parker St, Ormond, Vic 3163, | - | Australia. E-mail billm@suburbia.net | - | | - +---------------------------------------------------------------------------*/ - - -#ifndef _FPU_EMU_H_ -#define _FPU_EMU_H_ - -/* - * 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 __ASSEMBLY__ -#include "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 EXP_WAY_UNDER Const(-0x6000) /* Below the smallest denormal, but - still a 16 bit nr. */ -#define EXP_Infinity EXP_OVER -#define EXP_NaN EXP_OVER - -#define EXTENDED_Ebias Const(0x3fff) -#define EXTENDED_Emin (-0x3ffe) /* smallest valid exponent */ - -#define SIGN_POS Const(0) -#define SIGN_NEG Const(0x80) - -#define SIGN_Positive Const(0) -#define SIGN_Negative Const(0x8000) - - -/* Keep the order TAG_Valid, TAG_Zero, TW_Denormal */ -/* 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_Unsupported Const(7) /* Not supported by an 80486 */ - -#define TAG_Valid Const(0) /* valid */ -#define TAG_Zero Const(1) /* zero */ -#define TAG_Special Const(2) /* De-normal, + or - infinity, - or Not a Number */ -#define TAG_Empty Const(3) /* empty */ -#define TAG_Error Const(0x80) /* probably need to abort */ - -#define LOADED_DATA Const(10101) /* Special st() number to identify - loaded data (not on stack). */ - -/* A few flags (must be >= 0x10). */ -#define REV 0x10 -#define DEST_RM 0x20 -#define LOADED 0x40 - -#define FPU_Exception Const(0x80000000) /* Added to tag returns. */ - - -#ifndef __ASSEMBLY__ - -#include "fpu_system.h" - -#include <asm/sigcontext.h> /* for struct _fpstate */ -#include <asm/math_emu.h> -#include <linux/linkage.h> - -/* -#define RE_ENTRANT_CHECKING - */ - -#ifdef RE_ENTRANT_CHECKING -extern u_char emulating; -# define RE_ENTRANT_CHECK_OFF emulating = 0 -# define RE_ENTRANT_CHECK_ON emulating = 1 -#else -# define RE_ENTRANT_CHECK_OFF -# define RE_ENTRANT_CHECK_ON -#endif /* RE_ENTRANT_CHECKING */ - -#define FWAIT_OPCODE 0x9b -#define OP_SIZE_PREFIX 0x66 -#define ADDR_SIZE_PREFIX 0x67 -#define PREFIX_CS 0x2e -#define PREFIX_DS 0x3e -#define PREFIX_ES 0x26 -#define PREFIX_SS 0x36 -#define PREFIX_FS 0x64 -#define PREFIX_GS 0x65 -#define PREFIX_REPE 0xf3 -#define PREFIX_REPNE 0xf2 -#define PREFIX_LOCK 0xf0 -#define PREFIX_CS_ 1 -#define PREFIX_DS_ 2 -#define PREFIX_ES_ 3 -#define PREFIX_FS_ 4 -#define PREFIX_GS_ 5 -#define PREFIX_SS_ 6 -#define PREFIX_DEFAULT 7 - -struct address { - unsigned int offset; - unsigned int selector:16; - unsigned int opcode:11; - unsigned int empty:5; -}; -struct fpu__reg { - unsigned sigl; - unsigned sigh; - short exp; -}; - -typedef void (*FUNC)(void); -typedef struct fpu__reg FPU_REG; -typedef void (*FUNC_ST0)(FPU_REG *st0_ptr, u_char st0_tag); -typedef struct { u_char address_size, operand_size, segment; } - overrides; -/* This structure is 32 bits: */ -typedef struct { overrides override; - u_char default_mode; } fpu_addr_modes; -/* PROTECTED has a restricted meaning in the emulator; it is used - to signal that the emulator needs to do special things to ensure - that protection is respected in a segmented model. */ -#define PROTECTED 4 -#define SIXTEEN 1 /* We rely upon this being 1 (true) */ -#define VM86 SIXTEEN -#define PM16 (SIXTEEN | PROTECTED) -#define SEG32 PROTECTED -extern u_char const data_sizes_16[32]; - -#define register_base ((u_char *) registers ) -#define fpu_register(x) ( * ((FPU_REG *)( register_base + 10 * (x & 7) )) ) -#define st(x) ( * ((FPU_REG *)( register_base + 10 * ((top+x) & 7) )) ) - -#define STACK_OVERFLOW (FPU_stackoverflow(&st_new_ptr)) -#define NOT_EMPTY(i) (!FPU_empty_i(i)) - -#define NOT_EMPTY_ST0 (st0_tag ^ TAG_Empty) - -#define poppop() { FPU_pop(); FPU_pop(); } - -/* push() does not affect the tags */ -#define push() { top--; } - -#define signbyte(a) (((u_char *)(a))[9]) -#define getsign(a) (signbyte(a) & 0x80) -#define setsign(a,b) { if (b) signbyte(a) |= 0x80; else signbyte(a) &= 0x7f; } -#define copysign(a,b) { if (getsign(a)) signbyte(b) |= 0x80; \ - else signbyte(b) &= 0x7f; } -#define changesign(a) { signbyte(a) ^= 0x80; } -#define setpositive(a) { signbyte(a) &= 0x7f; } -#define setnegative(a) { signbyte(a) |= 0x80; } -#define signpositive(a) ( (signbyte(a) & 0x80) == 0 ) -#define signnegative(a) (signbyte(a) & 0x80) - -static inline void reg_copy(FPU_REG const *x, FPU_REG *y) -{ - *(short *)&(y->exp) = *(const short *)&(x->exp); - *(long long *)&(y->sigl) = *(const long long *)&(x->sigl); -} - -#define exponent(x) (((*(short *)&((x)->exp)) & 0x7fff) - EXTENDED_Ebias) -#define setexponentpos(x,y) { (*(short *)&((x)->exp)) = \ - ((y) + EXTENDED_Ebias) & 0x7fff; } -#define exponent16(x) (*(short *)&((x)->exp)) -#define setexponent16(x,y) { (*(short *)&((x)->exp)) = (y); } -#define addexponent(x,y) { (*(short *)&((x)->exp)) += (y); } -#define stdexp(x) { (*(short *)&((x)->exp)) += EXTENDED_Ebias; } - -#define isdenormal(ptr) (exponent(ptr) == EXP_BIAS+EXP_UNDER) - -#define significand(x) ( ((unsigned long long *)&((x)->sigl))[0] ) - - -/*----- Prototypes for functions written in assembler -----*/ -/* extern void reg_move(FPU_REG *a, FPU_REG *b); */ - -asmlinkage int FPU_normalize(FPU_REG *x); -asmlinkage int FPU_normalize_nuo(FPU_REG *x); -asmlinkage int FPU_u_sub(FPU_REG const *arg1, FPU_REG const *arg2, - FPU_REG *answ, unsigned int control_w, u_char sign, - int expa, int expb); -asmlinkage int FPU_u_mul(FPU_REG const *arg1, FPU_REG const *arg2, - FPU_REG *answ, unsigned int control_w, u_char sign, - int expon); -asmlinkage int FPU_u_div(FPU_REG const *arg1, FPU_REG const *arg2, - FPU_REG *answ, unsigned int control_w, u_char sign); -asmlinkage int FPU_u_add(FPU_REG const *arg1, FPU_REG const *arg2, - FPU_REG *answ, unsigned int control_w, u_char sign, - int expa, int expb); -asmlinkage int wm_sqrt(FPU_REG *n, int dummy1, int dummy2, - unsigned int control_w, u_char sign); -asmlinkage unsigned FPU_shrx(void *l, unsigned x); -asmlinkage unsigned FPU_shrxs(void *v, unsigned x); -asmlinkage unsigned long FPU_div_small(unsigned long long *x, unsigned long y); -asmlinkage int FPU_round(FPU_REG *arg, unsigned int extent, int dummy, - unsigned int control_w, u_char sign); - -#ifndef MAKING_PROTO -#include "fpu_proto.h" -#endif - -#endif /* __ASSEMBLY__ */ - -#endif /* _FPU_EMU_H_ */ |
