Juan Manuel Martinez Caamaño 0447b7a2c8 Avoid integer overflows when computing abs_diff (#1689) ...

After compiling OpenCL CTS with -fsanitize=undefined I stumbled upon
some signed integer overflows.

test_absdiff.cpp:103:24: runtime error: signed integer overflow:
  419625160 - -1937831252 cannot be represented in type 'int'
test_absdiff.cpp:101:28: runtime error: signed integer overflow:
  1277901399 - -1294103363 cannot be represented in type 'int'
test_absdiff.cpp:140:24: runtime error: signed integer overflow:
  8945130301981949496 - -2872789959208163723 cannot be represented in type
  'long int'
test_absdiff.cpp:138:29: runtime error: signed integer overflow:
  5488544718097069860 - -5558131619970145206 cannot be represented in type
  'long int'

The result from these operations was used to compare against the kernel result.

This patch replaces the abs_diff manual computations by a function that handles
the signed integer overflow case.

2023-05-16 08:44:15 -07:00

14 KiB

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