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Diffstat (limited to 'sys/i386/i386/math_emu.h')
| -rw-r--r-- | sys/i386/i386/math_emu.h | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/sys/i386/i386/math_emu.h b/sys/i386/i386/math_emu.h new file mode 100644 index 0000000..537fba5 --- /dev/null +++ b/sys/i386/i386/math_emu.h @@ -0,0 +1,154 @@ +/* + * linux/include/linux/math_emu.h + * + * (C) 1991 Linus Torvalds + */ +#ifndef _LINUX_MATH_EMU_H +#define _LINUX_MATH_EMU_H + +/*#define math_abort(x,y) \ +(((volatile void (*)(struct info *,unsigned int)) __math_abort)((x),(y)))*/ + +/* + * Gcc forces this stupid alignment problem: I want to use only two longs + * for the temporary real 64-bit mantissa, but then gcc aligns out the + * structure to 12 bytes which breaks things in math_emulate.c. Shit. I + * want some kind of "no-alignt" pragma or something. + */ + +typedef struct { + long a,b; + short exponent; +} temp_real; + +typedef struct { + short m0,m1,m2,m3; + short exponent; +} temp_real_unaligned; + +#define real_to_real(a,b) \ +((*(long long *) (b) = *(long long *) (a)),((b)->exponent = (a)->exponent)) + +typedef struct { + long a,b; +} long_real; + +typedef long short_real; + +typedef struct { + long a,b; + short sign; +} temp_int; + +struct swd { + int ie:1; + int de:1; + int ze:1; + int oe:1; + int ue:1; + int pe:1; + int sf:1; + int ir:1; + int c0:1; + int c1:1; + int c2:1; + int top:3; + int c3:1; + int b:1; +}; +struct i387_struct { + long cwd; + long swd; + long twd; + long fip; + long fcs; + long foo; + long fos; + long st_space[20]; /* 8*10 bytes for each FP-reg = 80 bytes */ +}; + +#define I387 (*(struct i387_struct *)&(((struct pcb *)curproc->p_addr)->pcb_savefpu)) +#define SWD (*(struct swd *) &I387.swd) +#define ROUNDING ((I387.cwd >> 10) & 3) +#define PRECISION ((I387.cwd >> 8) & 3) + +#define BITS24 0 +#define BITS53 2 +#define BITS64 3 + +#define ROUND_NEAREST 0 +#define ROUND_DOWN 1 +#define ROUND_UP 2 +#define ROUND_0 3 + +#define CONSTZ (temp_real_unaligned) {0x0000,0x0000,0x0000,0x0000,0x0000} +#define CONST1 (temp_real_unaligned) {0x0000,0x0000,0x0000,0x8000,0x3FFF} +#define CONSTPI (temp_real_unaligned) {0xC235,0x2168,0xDAA2,0xC90F,0x4000} +#define CONSTLN2 (temp_real_unaligned) {0x79AC,0xD1CF,0x17F7,0xB172,0x3FFE} +#define CONSTLG2 (temp_real_unaligned) {0xF799,0xFBCF,0x9A84,0x9A20,0x3FFD} +#define CONSTL2E (temp_real_unaligned) {0xF0BC,0x5C17,0x3B29,0xB8AA,0x3FFF} +#define CONSTL2T (temp_real_unaligned) {0x8AFE,0xCD1B,0x784B,0xD49A,0x4000} + +#define set_IE() (I387.swd |= 1) +#define set_DE() (I387.swd |= 2) +#define set_ZE() (I387.swd |= 4) +#define set_OE() (I387.swd |= 8) +#define set_UE() (I387.swd |= 16) +#define set_PE() (I387.swd |= 32) + +#define set_C0() (I387.swd |= 0x0100) +#define set_C1() (I387.swd |= 0x0200) +#define set_C2() (I387.swd |= 0x0400) +#define set_C3() (I387.swd |= 0x4000) + +/* ea.c */ + +char * ea(struct trapframe *, unsigned short); + +/* convert.c */ + +void frndint(const temp_real * __a, temp_real * __b); +void Fscale(const temp_real *, const temp_real *, temp_real *); +void short_to_temp(const short_real * __a, temp_real * __b); +void long_to_temp(const long_real * __a, temp_real * __b); +void temp_to_short(const temp_real * __a, short_real * __b); +void temp_to_long(const temp_real * __a, long_real * __b); +void real_to_int(const temp_real * __a, temp_int * __b); +void int_to_real(const temp_int * __a, temp_real * __b); + +/* get_put.c */ + +void get_short_real(temp_real *, struct trapframe *, unsigned short); +void get_long_real(temp_real *, struct trapframe *, unsigned short); +void get_temp_real(temp_real *, struct trapframe *, unsigned short); +void get_short_int(temp_real *, struct trapframe *, unsigned short); +void get_long_int(temp_real *, struct trapframe *, unsigned short); +void get_longlong_int(temp_real *, struct trapframe *, unsigned short); +void get_BCD(temp_real *, struct trapframe *, unsigned short); +void put_short_real(const temp_real *, struct trapframe *, unsigned short); +void put_long_real(const temp_real *, struct trapframe *, unsigned short); +void put_temp_real(const temp_real *, struct trapframe *, unsigned short); +void put_short_int(const temp_real *, struct trapframe *, unsigned short); +void put_long_int(const temp_real *, struct trapframe *, unsigned short); +void put_longlong_int(const temp_real *, struct trapframe *, unsigned short); +void put_BCD(const temp_real *, struct trapframe *, unsigned short); + +/* add.c */ + +void fadd(const temp_real *, const temp_real *, temp_real *); + +/* mul.c */ + +void fmul(const temp_real *, const temp_real *, temp_real *); + +/* div.c */ + +void fdiv(const temp_real *, const temp_real *, temp_real *); + +/* compare.c */ + +void fcom(const temp_real *, const temp_real *); +void fucom(const temp_real *, const temp_real *); +void ftst(const temp_real *); + +#endif |
