| 1037 | </tr> |
| 1038 | </tbody> |
| 1039 | </table> |
| 1040 | <h3>Suffix instruction meaning</h3> |
| 1041 | <p>Following describes suffixes for IMAGE_SAMPLE_<em> and IMAGE_GATHER4_</em> instructions:</p> |
| 1042 | <table> |
| 1043 | <thead> |
| 1044 | <tr> |
| 1045 | <th>Suffix</th> |
| 1046 | <th>Meaning</th> |
| 1047 | <th>Extra addresses</th> |
| 1048 | <th>Description</th> |
| 1049 | </tr> |
| 1050 | </thead> |
| 1051 | <tbody> |
| 1052 | <tr> |
| 1053 | <td>_L</td> |
| 1054 | <td>LOD</td> |
| 1055 | <td>-</td> |
| 1056 | <td>LOD is used instead of TA computed LOD.</td> |
| 1057 | </tr> |
| 1058 | <tr> |
| 1059 | <td>_B</td> |
| 1060 | <td>LOD BIAS</td> |
| 1061 | <td>1: lod bias</td> |
| 1062 | <td>Add this BIAS to the LOD TA computes.</td> |
| 1063 | </tr> |
| 1064 | <tr> |
| 1065 | <td>_CL</td> |
| 1066 | <td>LOD CLAMP</td> |
| 1067 | <td>-</td> |
| 1068 | <td>Clamp the LOD to be no larger than this value.</td> |
| 1069 | </tr> |
| 1070 | <tr> |
| 1071 | <td>_D</td> |
| 1072 | <td>Derivative</td> |
| 1073 | <td>2,4 or 6: dwords</td> |
| 1074 | <td>Send dx/dv, dx/dy, etc. slopes to TA for it to used in LOD computation.</td> |
| 1075 | </tr> |
| 1076 | <tr> |
| 1077 | <td>_CD</td> |
| 1078 | <td>Coarse Derivative</td> |
| 1079 | <td>2,4 or 6: dwords</td> |
| 1080 | <td>Look at _D</td> |
| 1081 | </tr> |
| 1082 | <tr> |
| 1083 | <td>_LZ</td> |
| 1084 | <td>Level 0</td> |
| 1085 | <td>-</td> |
| 1086 | <td>Force use of MIP level 0.</td> |
| 1087 | </tr> |
| 1088 | <tr> |
| 1089 | <td>_C</td> |
| 1090 | <td>PCF</td> |
| 1091 | <td>1: z-comp</td> |
| 1092 | <td>Percentage closer filtering.</td> |
| 1093 | </tr> |
| 1094 | <tr> |
| 1095 | <td>_O</td> |
| 1096 | <td>Offset</td> |
| 1097 | <td>1: offsets</td> |
| 1098 | <td>Send X, Y, Z integer offsets (packed into 1 Dword) to offset XYZ address.</td> |