30 lines
1.1 KiB
Diff
30 lines
1.1 KiB
Diff
diff --git a/src/include/OpenImageIO/fmath.h b/src/include/OpenImageIO/fmath.h
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index 0bd71ba9b..419e5e378 100644
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--- a/src/include/OpenImageIO/fmath.h
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+++ b/src/include/OpenImageIO/fmath.h
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@@ -1229,6 +1229,7 @@ convert_type (const S &src)
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/// shifted fully to the right.
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template<unsigned int FROM_BITS, unsigned int TO_BITS>
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inline OIIO_HOSTDEVICE unsigned int bit_range_convert(unsigned int in) {
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+ static_assert(FROM_BITS > 0, "FROM_BITS cannot be 0");
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unsigned int out = 0;
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int shift = TO_BITS - FROM_BITS;
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for (; shift > 0; shift -= FROM_BITS)
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@@ -1244,10 +1245,12 @@ inline OIIO_HOSTDEVICE unsigned int
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bit_range_convert(unsigned int in, unsigned int FROM_BITS, unsigned int TO_BITS)
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{
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unsigned int out = 0;
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- int shift = TO_BITS - FROM_BITS;
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- for (; shift > 0; shift -= FROM_BITS)
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- out |= in << shift;
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- out |= in >> -shift;
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+ if (FROM_BITS) {
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+ int shift = TO_BITS - FROM_BITS;
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+ for (; shift > 0; shift -= FROM_BITS)
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+ out |= in << shift;
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+ out |= in >> -shift;
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+ }
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return out;
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}
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