Intel® DPC++ Compatibility Tool Developer Guide and Reference
ID
768918
Date
6/24/2024
Public
A newer version of this document is available. Customers should click here to go to the newest version.
DPCT1000
DPCT1001
DPCT1002
DPCT1003
DPCT1004
DPCT1005
DPCT1006
DPCT1007
DPCT1008
DPCT1009
DPCT1010
DPCT1011
DPCT1012
DPCT1013
DPCT1014
DPCT1015
DPCT1016
DPCT1017
DPCT1018
DPCT1019
DPCT1020
DPCT1021
DPCT1022
DPCT1023
DPCT1024
DPCT1025
DPCT1026
DPCT1027
DPCT1028
DPCT1029
DPCT1030
DPCT1031
DPCT1032
DPCT1033
DPCT1034
DPCT1035
DPCT1036
DPCT1037
DPCT1038
DPCT1039
DPCT1040
DPCT1041
DPCT1042
DPCT1043
DPCT1044
DPCT1045
DPCT1046
DPCT1047
DPCT1048
DPCT1049
DPCT1050
DPCT1051
DPCT1052
DPCT1053
DPCT1054
DPCT1055
DPCT1056
DPCT1057
DPCT1058
DPCT1059
DPCT1060
DPCT1061
DPCT1062
DPCT1063
DPCT1064
DPCT1065
DPCT1066
DPCT1067
DPCT1068
DPCT1069
DPCT1070
DPCT1071
DPCT1072
DPCT1073
DPCT1074
DPCT1075
DPCT1076
DPCT1077
DPCT1078
DPCT1079
DPCT1080
DPCT1081
DPCT1082
DPCT1083
DPCT1084
DPCT1085
DPCT1086
DPCT1087
DPCT1088
DPCT1089
DPCT1090
DPCT1091
DPCT1092
DPCT1093
DPCT1094
DPCT1095
DPCT1096
DPCT1097
DPCT1098
DPCT1099
DPCT1100
DPCT1101
DPCT1102
DPCT1103
DPCT1104
DPCT1105
DPCT1106
DPCT1107
DPCT1108
DPCT1109
DPCT1110
DPCT1111
DPCT1112
Message
Detailed Help
Suggestions to Fix
DPCT1113
DPCT1114
DPCT1115
DPCT1116
DPCT1117
DPCT1118
DPCT1119
DPCT1120
DPCT1121
DPCT1122
DPCT1123
DPCT1124
DPCT1125
DPCT1126
DPCT1127
DPCT1128
DPCT1129
DPCT2001
DPCT3000
DPCT1112
Message
If the filter mode is set to linear, the behavior of image “read” may be different from tex1Dfetch in the original code. You may need to adjust the code.
Detailed Help
The CUDA* tex1Dfetch function always applies the nearest filtering mode. In the migrated code, the image read function applies the filtering mode that is set for the texture object. There may be a different result on the image read, so you may need to align the filter mode on image read.
Suggestions to Fix
For example, this original CUDA code:
cudaTextureDesc desc;
desc.filterMode = cudaFilterModeLinear;
...
cudaTextureObject_t obj;
cudaCreateTextureObject(&obj, ..., &desc, ...);
...
tex1Dfetch(..., obj, ...);
results in the following migrated SYCL* code:
dpct::sampling_info desc;
desc.set(sycl::filtering_mode::linear);
...
dpct::image_wrapper_base_p obj;
obj = dpct::create_image_wrapper(..., desc);
...
/*
DPCT1112:0: If the filter mode is set to 'linear', the behavior of image
"read" may be different from "tex1Dfetch" in the original code. You may need
to adjust the code.
*/
obj.read(...);
which is rewritten to:
dpct::sampling_info desc;
desc.set(sycl::filtering_mode::nearest); // Update the filtering mode from linear to nearest
...
dpct::image_wrapper_base_p obj;
obj = dpct::create_image_wrapper(..., desc);
...