1.1 --- a/src/pvr2/tacore.c	Sun Aug 06 03:36:51 2006 +0000
     1.2 +++ b/src/pvr2/tacore.c	Sun Aug 06 03:50:36 2006 +0000
     1.3 @@ -1,5 +1,5 @@
     1.4  /**
     1.5 - * $Id: tacore.c,v 1.4 2006-08-06 03:36:51 nkeynes Exp $
     1.6 + * $Id: tacore.c,v 1.5 2006-08-06 03:50:36 nkeynes Exp $
     1.7   *
     1.8   * PVR2 Tile Accelerator implementation
     1.9   *
    1.10 @@ -100,6 +100,12 @@
    1.11  
    1.12  #define TA_IS_END_VERTEX(i) (i & 0x10000000)
    1.13  
    1.14 +/** Note these are not the IEEE 754 definitions - the TA treats NANs
    1.15 + * as if they were INFs of the appropriate sign.
    1.16 + */
    1.17 +#define TA_IS_INF(f) (((*((uint32_t *)&f)) & 0xFF800000) == 0x7F800000)
    1.18 +#define TA_IS_NINF(f) (((*((uint32_t *)&f)) & 0xFF800000) == 0xFF800000)
    1.19 +
    1.20  #define MIN3( x1, x2, x3 ) ( (x1)<(x2)? ((x1)<(x3)?(x1):(x3)) : ((x2)<(x3)?(x2):(x3)) )
    1.21  #define MAX3( x1, x2, x3 ) ( (x1)>(x2)? ((x1)>(x3)?(x1):(x3)) : ((x2)>(x3)?(x2):(x3)) )
    1.22  
    1.23 @@ -457,16 +463,16 @@
    1.24       * clamping here)
    1.25       */
    1.26      for( i=0; i<ta_status.vertex_count; i++ ) {
    1.27 -	if( ta_status.poly_vertex[i].x < 0.0 ) {
    1.28 +	if( ta_status.poly_vertex[i].x < 0.0 || TA_IS_NINF(ta_status.poly_vertex[i].x) ) {
    1.29  	    tx[i] = -1;
    1.30 -	} else if( ta_status.poly_vertex[i].x > (float)INT_MAX ) {
    1.31 +	} else if( ta_status.poly_vertex[i].x > (float)INT_MAX || TA_IS_INF(ta_status.poly_vertex[i].x) ) {
    1.32  	    tx[i] = INT_MAX/32;
    1.33  	} else {
    1.34  	    tx[i] = (int)(ta_status.poly_vertex[i].x / 32.0);
    1.35  	}
    1.36 -	if( ta_status.poly_vertex[i].y < 0.0 ) {
    1.37 +	if( ta_status.poly_vertex[i].y < 0.0 || TA_IS_NINF(ta_status.poly_vertex[i].y)) {
    1.38  	    ty[i] = -1;
    1.39 -	} else if( ta_status.poly_vertex[i].y > (float)INT_MAX ) {
    1.40 +	} else if( ta_status.poly_vertex[i].y > (float)INT_MAX || TA_IS_INF(ta_status.poly_vertex[i].y) ) {
    1.41  	    ty[i] = INT_MAX/32;
    1.42  	} else {
    1.43  	    ty[i] = (int)(ta_status.poly_vertex[i].y / 32.0);