pspvfpu.c File Reference

#include <malloc.h>
#include <string.h>
#include "pspthreadman.h"
#include "pspvfpu.h"

Include dependency graph for pspvfpu.c:

Data Structures
struct	pspvfpu_context

Macros
#define	NMAT   8
#define	SV(N)
#define	LV(N)

Functions
void	pspvfpu_use_matrices (struct pspvfpu_context *c, vfpumatrixset_t keepset, vfpumatrixset_t tempset)
	Use a set of VFPU matrices.
struct pspvfpu_context *	pspvfpu_initcontext (void)
	Prepare to use the VFPU.
void	pspvfpu_deletecontext (struct pspvfpu_context *c)
	Delete a VFPU context.

Macro Definition Documentation

LV

#define LV

(

N

)

Value:

        asm("lv.q       c"#N"00,  0 + %0\n"     \
            "lv.q       c"#N"10, 16 + %0\n"     \
            "lv.q       c"#N"20, 32 + %0\n"     \
            "lv.q       c"#N"30, 48 + %0\n"     \
            : : "m" (c->fpregs[N * 4*4])        \
            : "memory")

NMAT

#define NMAT   8

SV

#define SV

(

N

)

Value:

        asm("sv.q       c"#N"00,  0 + %0, wt\n" \
            "sv.q       c"#N"10, 16 + %0, wt\n" \
            "sv.q       c"#N"20, 32 + %0, wt\n" \
            "sv.q       c"#N"30, 48 + %0, wt\n" \
            : "=m" (c->fpregs[N * 4*4])         \
            : : "memory")

Function Documentation

pspvfpu_deletecontext()

void pspvfpu_deletecontext

(

struct pspvfpu_context *

context

)

Delete a VFPU context.

This frees the resources used by the VFPU context.

Parameters

context

The VFPU context to be deleted.

References c, i, NMAT, and NULL.

pspvfpu_initcontext()

struct pspvfpu_context * pspvfpu_initcontext

(

void

)

Prepare to use the VFPU.

This set's the calling thread's VFPU attribute, and returns a pointer to some VFPU state storage. The initial value all all VFPU matrix registers is undefined.

Returns

A VFPU context

References c, NULL, PSP_THREAD_ATTR_VFPU, sceKernelChangeCurrentThreadAttr(), VFPU_ALIGNMENT, and x.

pspvfpu_use_matrices()

void pspvfpu_use_matrices	(	struct pspvfpu_context *	context,
		vfpumatrixset_t	keepset,
		vfpumatrixset_t	tempset
	)

Use a set of VFPU matrices.

This restores the parts of the VFPU state the caller wants restored (if necessary). If the caller was the previous user of the the matrix set, then this call is effectively a no-op. If a matrix has never been used by this context before, then it will initially have an undefined value.

Parameters

context	The VFPU context the caller wants to restore from. It is valid to pass NULL as a context. This means the caller wants to reserve a temporary matrix without affecting other VFPU users, but doesn't want any long-term matrices itself.
keepset	The set of matrices the caller wants to use, and keep the values persistently.
tempset	A set of matrices the callers wants to use temporarily, but doesn't care about the values in the long-term.

References c, NULL, and x.