b40ce4165d
Note ALL MODULES MUST BE RECOMPILED make the kernel aware that there are smaller units of scheduling than the process. (but only allow one thread per process at this time). This is functionally equivalent to teh previousl -current except that there is a thread associated with each process. Sorry john! (your next MFC will be a doosie!) Reviewed by: peter@freebsd.org, dillon@freebsd.org X-MFC after: ha ha ha ha
157 lines
4.5 KiB
C
157 lines
4.5 KiB
C
/*
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* linux/include/linux/math_emu.h
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*
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* (C) 1991 Linus Torvalds
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*
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* $FreeBSD$
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*/
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#ifndef _LINUX_MATH_EMU_H
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#define _LINUX_MATH_EMU_H
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/*#define math_abort(x,y) \
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(((volatile void (*)(struct info *,unsigned int)) __math_abort)((x),(y)))*/
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/*
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* Gcc forces this stupid alignment problem: I want to use only two int32_t's
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* for the temporary real 64-bit mantissa, but then gcc aligns out the
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* structure to 12 bytes which breaks things in math_emulate.c. Shit. I
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* want some kind of "no-alignt" pragma or something.
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*/
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typedef struct {
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int32_t a,b;
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short exponent;
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} temp_real;
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typedef struct {
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short m0,m1,m2,m3;
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short exponent;
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} temp_real_unaligned;
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#define real_to_real(a,b) \
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((*(long long *) (b) = *(long long *) (a)),((b)->exponent = (a)->exponent))
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typedef struct {
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int32_t a,b;
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} long_real;
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typedef int32_t short_real;
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typedef struct {
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int32_t a,b;
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short sign;
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} temp_int;
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struct swd {
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int ie:1;
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int de:1;
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int ze:1;
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int oe:1;
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int ue:1;
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int pe:1;
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int sf:1;
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int ir:1;
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int c0:1;
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int c1:1;
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int c2:1;
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int top:3;
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int c3:1;
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int b:1;
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};
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struct i387_struct {
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int32_t cwd;
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int32_t swd;
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int32_t twd;
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int32_t fip;
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int32_t fcs;
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int32_t foo;
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int32_t fos;
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int32_t st_space[20]; /* 8*10 bytes for each FP-reg = 80 bytes */
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};
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#define I387 (*(struct i387_struct *)&(curthread->td_pcb->pcb_save.sv_87))
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#define SWD (*(struct swd *) &I387.swd)
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#define ROUNDING ((I387.cwd >> 10) & 3)
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#define PRECISION ((I387.cwd >> 8) & 3)
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#define BITS24 0
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#define BITS53 2
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#define BITS64 3
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#define ROUND_NEAREST 0
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#define ROUND_DOWN 1
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#define ROUND_UP 2
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#define ROUND_0 3
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#define CONSTZ (temp_real_unaligned) {0x0000,0x0000,0x0000,0x0000,0x0000}
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#define CONST1 (temp_real_unaligned) {0x0000,0x0000,0x0000,0x8000,0x3FFF}
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#define CONSTPI (temp_real_unaligned) {0xC235,0x2168,0xDAA2,0xC90F,0x4000}
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#define CONSTLN2 (temp_real_unaligned) {0x79AC,0xD1CF,0x17F7,0xB172,0x3FFE}
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#define CONSTLG2 (temp_real_unaligned) {0xF799,0xFBCF,0x9A84,0x9A20,0x3FFD}
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#define CONSTL2E (temp_real_unaligned) {0xF0BC,0x5C17,0x3B29,0xB8AA,0x3FFF}
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#define CONSTL2T (temp_real_unaligned) {0x8AFE,0xCD1B,0x784B,0xD49A,0x4000}
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#define set_IE() (I387.swd |= 1)
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#define set_DE() (I387.swd |= 2)
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#define set_ZE() (I387.swd |= 4)
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#define set_OE() (I387.swd |= 8)
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#define set_UE() (I387.swd |= 16)
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#define set_PE() (I387.swd |= 32)
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#define set_C0() (I387.swd |= 0x0100)
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#define set_C1() (I387.swd |= 0x0200)
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#define set_C2() (I387.swd |= 0x0400)
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#define set_C3() (I387.swd |= 0x4000)
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/* ea.c */
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static char * ea(struct trapframe *, unsigned short);
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/* convert.c */
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static void frndint(const temp_real * __a, temp_real * __b);
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static void Fscale(const temp_real *, const temp_real *, temp_real *);
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static void short_to_temp(const short_real * __a, temp_real * __b);
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static void long_to_temp(const long_real * __a, temp_real * __b);
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static void temp_to_short(const temp_real * __a, short_real * __b);
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static void temp_to_long(const temp_real * __a, long_real * __b);
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static void real_to_int(const temp_real * __a, temp_int * __b);
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static void int_to_real(const temp_int * __a, temp_real * __b);
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/* get_put.c */
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static void get_short_real(temp_real *, struct trapframe *, unsigned short);
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static void get_long_real(temp_real *, struct trapframe *, unsigned short);
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static void get_temp_real(temp_real *, struct trapframe *, unsigned short);
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static void get_short_int(temp_real *, struct trapframe *, unsigned short);
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static void get_long_int(temp_real *, struct trapframe *, unsigned short);
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static void get_longlong_int(temp_real *, struct trapframe *, unsigned short);
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static void get_BCD(temp_real *, struct trapframe *, unsigned short);
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static void put_short_real(const temp_real *, struct trapframe *, unsigned short);
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static void put_long_real(const temp_real *, struct trapframe *, unsigned short);
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static void put_temp_real(const temp_real *, struct trapframe *, unsigned short);
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static void put_short_int(const temp_real *, struct trapframe *, unsigned short);
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static void put_long_int(const temp_real *, struct trapframe *, unsigned short);
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static void put_longlong_int(const temp_real *, struct trapframe *, unsigned short);
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static void put_BCD(const temp_real *, struct trapframe *, unsigned short);
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/* add.c */
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static void fadd(const temp_real *, const temp_real *, temp_real *);
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/* mul.c */
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static void fmul(const temp_real *, const temp_real *, temp_real *);
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/* div.c */
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static void fdiv(const temp_real *, const temp_real *, temp_real *);
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/* compare.c */
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static void fcom(const temp_real *, const temp_real *);
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static void fucom(const temp_real *, const temp_real *);
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static void ftst(const temp_real *);
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#endif
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