pspfpu.h File Reference

#include <stdint.h>

Go to the source code of this file.

Defines
#define	FPU_RM_MASK   0x03
	Mask value for rounding mode.
#define	FPU_FLAGS_POS   2
	Bit position of the flag bits.
#define	FPU_ENABLE_POS   7
	Bit position of the enable bits.
#define	FPU_CAUSE_POS   12
	Bit position of the cause bits.
#define	FPU_CC0_POS   23
	Bit position of the cc0 bit.
#define	FPU_FS_POS   24
	Bit position of the fs bit.
#define	FPU_CC17_POS   25
	Bit position of the cc1->7 bits.
#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)
Enumerations
enum	FpuRoundMode { FPU_RN = 0, FPU_RZ = 1, FPU_RP = 2, FPU_RM = 3 }
	Enumeration for FPU rounding modes. More...
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 }
	Enumeration for FPU exceptions. More...
Functions
uint32_t	pspfpu_get_fcr31 (void)
	Get the current value of the control/status register.
void	pspfpu_set_fcr31 (uint32_t var)
	Set the current value of the control/status register.
void	pspfpu_set_roundmode (enum FpuRoundMode mode)
	Set the current round mode.
enum FpuRoundMode	pspfpu_get_roundmode (void)
	Get the current round mode.
uint32_t	pspfpu_get_flags (void)
	Get the exception flags (set when an exception occurs but the actual exception bit is not enabled).
void	pspfpu_clear_flags (uint32_t clear)
	Clear the flags bits.
uint32_t	pspfpu_get_enable (void)
	Get the exception enable flags.
void	pspfpu_set_enable (uint32_t enable)
	Set the enable flags bits.
uint32_t	pspfpu_get_cause (void)
	Get the cause bits (only useful if you installed your own exception handler).
void	pspfpu_clear_cause (uint32_t clear)
	Clear the cause bits.
uint32_t	pspfpu_get_fs (void)
	Get the current value of the FS bit (if FS is 0 then an exception occurs with denormalized values, if 1 then they are rewritten as 0.
void	pspfpu_set_fs (uint32_t fs)
	Set the FS bit.
uint32_t	pspfpu_get_condbits (void)
	Get the condition flags (8 bits).
void	pspfpu_clear_condbits (uint32_t clear)
	Clear the condition bits.

---

Define Documentation

#define FPU_CAUSE_MASK   (0x3F << FPU_CAUSE_POS)

#define FPU_CAUSE_POS   12

Bit position of the cause bits.

#define FPU_CC0_MASK   (1 << FPU_CC0_POS)

#define FPU_CC0_POS   23

Bit position of the cc0 bit.

#define FPU_CC17_MASK   (0x7F << FPU_CC17_POS)

#define FPU_CC17_POS   25

Bit position of the cc1->7 bits.

#define FPU_ENABLE_MASK   (0x1F << FPU_ENABLE_POS)

#define FPU_ENABLE_POS   7

Bit position of the enable bits.

#define FPU_FLAGS_MASK   (0x1F << FPU_FLAGS_POS)

#define FPU_FLAGS_POS   2

Bit position of the flag bits.

#define FPU_FS_MASK   (1 << FPU_FS_POS)

#define FPU_FS_POS   24

Bit position of the fs bit.

#define FPU_RM_MASK   0x03

Mask value for rounding mode.

---

Enumeration Type Documentation

enum FpuExceptions

Enumeration for FPU exceptions.

Enumerator:

FPU_EXCEPTION_INEXACT	Inexact operation exception.
FPU_EXCEPTION_UNDERFLOW	Underflow exception.
FPU_EXCEPTION_OVERFLOW	Overflow exception.
FPU_EXCEPTION_DIVBYZERO	Division by zero exception.
FPU_EXCEPTION_INVALIDOP	Invalid operation exception.
FPU_EXCEPTION_UNIMPOP	Unimplemented operation exception (only supported in the cause bits).
FPU_EXCEPTION_ALL	All exceptions.

enum FpuRoundMode

Enumeration for FPU rounding modes.

Enumerator:

FPU_RN	Round to nearest representable value.
FPU_RZ	Round towards zero.
FPU_RP	Round towards plus infinity.
FPU_RM	Round towards minus infinity.

---

Function Documentation

void pspfpu_clear_cause

(

uint32_t

clear

)

Clear the cause bits.

Parameters:

clear

- Bitmask of the bits to clear, one or more of FpuExceptions

void pspfpu_clear_condbits

(

uint32_t

clear

)

Clear the condition bits.

Parameters:

clear

- Bitmask of the bits to clear

void pspfpu_clear_flags

(

uint32_t

clear

)

Clear the flags bits.

Parameters:

clear

- Bitmask of the bits to clear, one or more of FpuExceptions

uint32_t pspfpu_get_cause

(

void

)

Get the cause bits (only useful if you installed your own exception handler).

Returns:

Bitmask of flags, zero or more of FpuExceptions

uint32_t pspfpu_get_condbits

(

void

)

Get the condition flags (8 bits).

Returns:

The current condition flags

uint32_t pspfpu_get_enable

(

void

)

Get the exception enable flags.

Returns:

Bitmask of the flags, zero or more of FpuExceptions

uint32_t pspfpu_get_fcr31

(

void

)

Get the current value of the control/status register.

Returns:

The value of the control/status register

uint32_t pspfpu_get_flags

(

void

)

Get the exception flags (set when an exception occurs but the actual exception bit is not enabled).

Returns:

Bitmask of the flags, zero or more of FpuExceptions

uint32_t pspfpu_get_fs

(

void

)

Get the current value of the FS bit (if FS is 0 then an exception occurs with denormalized values, if 1 then they are rewritten as 0.

Returns:

The current state of the FS bit (0 or 1)

enum FpuRoundMode pspfpu_get_roundmode

(

void

)

Get the current round mode.

Returns:

The round mode, one of FpuRoundMode

void pspfpu_set_enable

(

uint32_t

enable

)

Set the enable flags bits.

Parameters:

enable

- Bitmask of exceptions to enable, zero or more of FpuExceptions

void pspfpu_set_fcr31

(

uint32_t

var

)

Set the current value of the control/status register.

Parameters:

var

- The value to set.

void pspfpu_set_fs

(

uint32_t

fs

)

Set the FS bit.

Parameters:

fs

- 0 or 1 to unset or set fs

void pspfpu_set_roundmode

(

enum FpuRoundMode

mode

)

Set the current round mode.

Parameters:

mode

- The rounding mode to set, one of FpuRoundMode

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