pspfpu.h

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/*
 * PSP Software Development Kit - http://www.pspdev.org
 * -----------------------------------------------------------------------
 * Licensed under the BSD license, see LICENSE in PSPSDK root for details.
 *
 * pspfpu.h - Prototypes for the FPU library
 *
 * Copyright (c) 2006 TyRaNiD (James F.) 
 *
 * $Id: pspfpu.h 1782 2006-02-04 12:57:05Z tyranid $
 */
#ifndef __PSPFPU_H__
#define __PSPFPU_H__

#include <stdint.h>

/* Note the bit settings in here come from an NEC MIPSv4 document,
 * they seem sensible.
 */

#ifdef __cplusplus
extern "C" {
#endif

enum FpuRoundMode
{
        FPU_RN = 0,
        FPU_RZ = 1,
        FPU_RP = 2,
        FPU_RM = 3,
};

#define FPU_RM_MASK 0x03 

enum FpuExceptions
{
        FPU_EXCEPTION_INEXACT   = 0x01,
        FPU_EXCEPTION_UNDERFLOW = 0x02,
        FPU_EXCEPTION_OVERFLOW  = 0x04,
        FPU_EXCEPTION_DIVBYZERO = 0x08,
        FPU_EXCEPTION_INVALIDOP = 0x10,
        FPU_EXCEPTION_UNIMPOP   = 0x20,
        FPU_EXCEPTION_ALL       = 0x3F
};

#define FPU_FLAGS_POS   2

#define FPU_ENABLE_POS 7

#define FPU_CAUSE_POS  12

#define FPU_CC0_POS    23

#define FPU_FS_POS     24

#define FPU_CC17_POS   25

#define FPU_FLAGS_MASK  (0x1F << FPU_FLAGS_POS)
#define FPU_ENABLE_MASK (0x1F << FPU_ENABLE_POS)
#define FPU_CAUSE_MASK  (0x3F << FPU_CAUSE_POS)
#define FPU_CC0_MASK    (1 << FPU_CC0_POS)
#define FPU_FS_MASK     (1 << FPU_FS_POS)
#define FPU_CC17_MASK   (0x7F << FPU_CC17_POS)

uint32_t pspfpu_get_fcr31(void);

void pspfpu_set_fcr31(uint32_t var);

void pspfpu_set_roundmode(enum FpuRoundMode mode);

enum FpuRoundMode pspfpu_get_roundmode(void);

uint32_t pspfpu_get_flags(void);

void pspfpu_clear_flags(uint32_t clear);

uint32_t pspfpu_get_enable(void);

void pspfpu_set_enable(uint32_t enable);

uint32_t pspfpu_get_cause(void);

void pspfpu_clear_cause(uint32_t clear);

uint32_t pspfpu_get_fs(void);

void pspfpu_set_fs(uint32_t fs);

uint32_t pspfpu_get_condbits(void);

void pspfpu_clear_condbits(uint32_t clear);

#ifdef __cplusplus
}
#endif

#endif  /* __PSPFPU_H__ */

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