Subversion Repositories Shiroi

/* am9511.h
 */

#ifndef _AM9511_H
#define _AM9511_H

/* Smallest and largest numbers in the AM9511 floating point
 * format. 0.5x2^-64 to 0.99999..x2^63.
 *
 * As a note: these values can be exactly computed:
 *
 * unsigned char am_small[4], am_big[4];
 * fp_put(0, -64, 0x80, 0x0000); will generate AM_SMALL
 * fp_am(am_small);
 * fp_put(0,  63, 0xff, 0xffff); will generate AM_BIG
 * fp_am(am_big);
 */
#define AM_SMALL 2.71051e-20
#define AM_BIG 9.22337e+18
#define AM_PI 3.141592

#define AM_SR 0x80     /* service request on completion */
#define AM_SINGLE 0x60 /* 16 bit integer */
#define AM_DOUBLE 0x20 /* 32 bit integer */
#define AM_FIXED 0x20  /* fixed point */
#define AM_FLOAT 0x00  /* 32 bit float */

#define AM_NOP 0x00  /* no operation */
#define AM_SQRT 0x01 /* square root */
#define AM_SIN 0x02  /* sine */
#define AM_COS 0x03  /* cosine */
#define AM_TAN 0x04  /* tangent */
#define AM_ASIN 0x05 /* inverse sine */
#define AM_ACOS 0x06 /* inverse cosine */
#define AM_ATAN 0x07 /* inverse tangent */
#define AM_LOG 0x08  /* common logarithm (base 10) */
#define AM_LN 0x09   /* natural logairth (base e) */
#define AM_EXP 0x0a  /* exponential (e^x) */
#define AM_PWR 0x0b  /* power nos^tos */
#define AM_ADD 0x0c  /* add */
#define AM_SUB 0x0d  /* subtract nos-tos */
#define AM_MUL 0x0e  /* multiply, lower half */
#define AM_DIV 0x0f  /* divide nos/tos */
#define AM_FADD 0x10 /* floating add */
#define AM_FSUB 0x11 /* floating subtract */
#define AM_FMUL 0x12 /* floating multiply */
#define AM_FDIV 0x13 /* floating divide */
#define AM_CHS 0x14  /* change sign */
#define AM_CHSF 0x15 /* floating change sign */
#define AM_MUU 0x16  /* multiply, upper half */
#define AM_PTO 0x17  /* push tos to nos (copy) */
#define AM_POP 0x18  /* pop */
#define AM_XCH 0x19  /* exchange tos and nos */
#define AM_PUPI 0x1a /* push pi */
/*                  0x1b */
#define AM_FLTD 0x1c /* 32 bit to float */
#define AM_FLTS 0x1d /* 16 bit to float */
#define AM_FIXD 0x1e /* float to 32 bit */
#define AM_FIXS 0x1f /* float to 16 bit */

#define AM_BUSY 0x80     /* chip is busy */
#define AM_SIGN 0x40     /* tos negative */
#define AM_ZERO 0x20     /* tos zero */
#define AM_ERR_MASK 0x1E /* mask for errors */
#define AM_CARRY 0x01    /* carry/borrow from most significant bit */

#define AM_ERR_NONE 0x00 /* no error */
#define AM_ERR_DIV0 0x10 /* divide by zero */
#define AM_ERR_NEG 0x08  /* sqrt, log of negative */
#define AM_ERR_ARG 0x18  /* arg of asin, cos, e^x too large */
#define AM_ERR_UND 0x04  /* underflow */
#define AM_ERR_OVF 0x02  /* overflow */

void* am_create(int status, int data);
void am_push(void*, unsigned char);
unsigned char am_pop(void*);
unsigned char am_status(void*);
void am_command(void*, unsigned char);
void am_reset(void*);

#ifdef NDEBUG
#define am_dump(x)
#else

void am_dump(void*, unsigned char);
#endif


#endif