gc-linux-cvs

[<pal...@us...>]

Update of /cvsroot/gc-linux/libgx/src
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv20533/src

Modified Files:
	Makefile.am 
Added Files:
	ps_cast.S ps_cast_init.c 
Log Message:
Added PS Fast Casting


--- NEW FILE: ps_cast.S ---

#include "asm.h"

#define DECLARES(prefix,float,int,gqr_arg,gqr) \
_GLOBAL(PSCast##prefix##float##to##int) \
  psql  f0,0(r3),gqr_arg,gqr0; \
  psqst f0,0(r4),gqr_arg,gqr; \
  blr; \
_GLOBAL(PSCast##prefix##int##to##float) \
  psql  f0,0(r3),gqr_arg,gqr; \
  psqst f0,0(r4),gqr_arg,gqr0; \
  blr;

#define DECLARE(a,b,c) DECLARES(Single,a,b,1,c) DECLARES(Double,a,b,0,c)

DECLARE(F32,U8,gqr2)
DECLARE(F32,U16,gqr3)
DECLARE(F32,S8,gqr4)
DECLARE(F32,S16,gqr5)

_GLOBAL(PSCopy2Floats)	
  psql  f0,0(r4),0,gqr0
  psqst f0,0(r3),0,gqr0
  blr



--- NEW FILE: ps_cast_init.c ---
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include "ps_cast.h"

/* GQR is 2-7    LD_SCALE
          13-15  LD_TYPE
          18-23  ST_SCALE
          29-31  ST_TYPE

ST_TYPE is 
0 - single-precision floating-point (no conversion)
1-3 reserved
4   u8
5   u16
6   s8
7   s16
*/

#define TYPE_U8   4
#define TYPE_U16  5
#define TYPE_S8   6
#define TYPE_S16  7

#define SCALE_NONE 0

#define MAKE_GQR(ls,lt,ss,st) (((ls) << 24)|((lt) << 16)|((ss) << 8)|(st))

static int Load(unsigned int gqr,unsigned int value)
{
  char fname[64];
  int fd;
  int len;
  int ret;
  /* open the device */
  sprintf(fname,"/proc/sys/gqr/gqr%i",gqr);
  fd = open(fname,O_RDWR);
  if (fd < 0)
    return errno;
  
  len = sprintf(fname,"%u",value);
  ret = (write(fd,fname,len) != len);
  close(fd);
  return ret;
}

int PSInitFastCast()
{
  return (Load(0,0) ||
	  /* GQR 2 - u8 */
	  Load(2,MAKE_GQR(SCALE_NONE,TYPE_U8,SCALE_NONE,TYPE_U8)) ||
	  /* GQR 3 - u16 */
	  Load(3,MAKE_GQR(SCALE_NONE,TYPE_U16,SCALE_NONE,TYPE_U16)) ||
	  /* GQR 4 - s8 */
	  Load(4,MAKE_GQR(SCALE_NONE,TYPE_S8,SCALE_NONE,TYPE_S8)) ||
	  /* GQR 5 - s16 */
	  Load(5,MAKE_GQR(SCALE_NONE,TYPE_S16,SCALE_NONE,TYPE_S16)));
}

Index: Makefile.am
===================================================================
RCS file: /cvsroot/gc-linux/libgx/src/Makefile.am,v
retrieving revision 1.2
retrieving revision 1.3
diff -u -d -r1.2 -r1.3
--- Makefile.am	31 Oct 2004 22:34:59 -0000	1.2
+++ Makefile.am	6 Dec 2004 18:35:15 -0000	1.3
@@ -2,5 +2,5 @@
 AM_CFLAGS=-Wa,-mgekko -Wa,-mregnames -Wa,-gstabs+
  
 lib_LTLIBRARIES = libgx.la
-libgx_la_SOURCES=gx.c gu.c gx_asm.S gu_asm.S
+libgx_la_SOURCES=gx.c gu.c gx_asm.S gu_asm.S ps_cast_init.c ps_cast.S