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This commit is contained in:
Bernhard Stoeckner
2025-04-17 17:45:32 +02:00
parent 855c3c9d3c
commit f468568958
33 changed files with 641 additions and 199 deletions
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36
kernel-open/common/inc/nvmisc.h
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@@ -694,6 +694,42 @@ nvPrevPow2_U64(const NvU64 x )
} \
}
//
// Bug 4851259: Newly added functions must be hidden from certain HS-signed
// ucode compilers to avoid signature mismatch.
//
#ifndef NVDEC_1_0
/*!
* Returns the position of nth set bit in the given mask.
*
* Returns -1 if mask has fewer than n bits set.
*
* n is 0 indexed and has valid values 0..31 inclusive, so "zeroth" set bit is
* the first set LSB.
*
* Example, if mask = 0x000000F0u and n = 1, the return value will be 5.
* Example, if mask = 0x000000F0u and n = 4, the return value will be -1.
*/
static NV_FORCEINLINE NvS32
nvGetNthSetBitIndex32(NvU32 mask, NvU32 n)
{
NvU32 seenSetBitsCount = 0;
NvS32 index;
FOR_EACH_INDEX_IN_MASK(32, index, mask)
{
if (seenSetBitsCount == n)
{
return index;
}
++seenSetBitsCount;
}
FOR_EACH_INDEX_IN_MASK_END;
return -1;
}
#endif // NVDEC_1_0
//
// Size to use when declaring variable-sized arrays
//