HP2100/hp2100_fp1.h

/* hp2100_fp1.h: HP 2100/1000 multiple-precision floating point declarations

   Copyright (c) 2005-2017, J. David Bryan

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   Software is furnished to do so, subject to the following conditions:

   The above copyright notice and this permission notice shall be included in
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   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
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   15-Feb-17    JDB     Deleted unneeded guard macro definition
   24-Dec-14    JDB     Changed fp_ucom return from uint32 to uint16
   14-Mar-13    MP      Changed guard macro name to avoid reserved namespace
   16-Oct-06    JDB     Generalized FP calling sequences for F-Series
   12-Oct-06    JDB     Altered x_trun for F-Series FFP compatibility
*/



/* Special operands. */

#define ACCUM   NULL                                    /* result not returned */
static const OP NOP = { { 0, 0, 0, 0, 0 } };            /* unneeded operand */


/* Generalized floating-point handlers. */

void   fp_prec   (uint16 opcode, OPSIZE *operand_l, OPSIZE *operand_r, OPSIZE *result);
uint32 fp_exec   (uint16 opcode, OP *result, OP operand_l, OP operand_r);
OP     fp_accum  (const OP *operand, OPSIZE precision);
uint32 fp_pack   (OP *result, OP mantissa, int32 exponent, OPSIZE precision);
uint32 fp_nrpack (OP *result, OP mantissa, int32 exponent, OPSIZE precision);
uint32 fp_unpack (OP *mantissa, int32 *exponent, OP packed, OPSIZE precision);
uint16 fp_ucom   (OP *mantissa, OPSIZE precision);
uint32 fp_pcom   (OP *packed, OPSIZE precision);
uint32 fp_trun   (OP *result, OP source, OPSIZE precision);
uint32 fp_cvt    (OP *result, OPSIZE source_precision, OPSIZE dest_precision);