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Added __mul24 & __umul24 documentation entry

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Elias Konstantinidis
2016-10-02 10:08:07 +03:00
committed by Maneesh Gupta
parent 2bc541e15f
commit 0b4b1b7df8
1 changed files with 2 additions and 0 deletions
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docs/markdown/hip_kernel_language.md
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@@ -451,6 +451,8 @@ Following is the list of supported integer intrinsics. Note that intrinsics are
| unsigned int __ffsll(long long int x) <br><sub>Find the position of least signigicant bit set to 1 in a 64 bit signed integer.</sub> | | unsigned int __ffsll(long long int x) <br><sub>Find the position of least signigicant bit set to 1 in a 64 bit signed integer.</sub> |
| unsigned int __popc ( unsigned int x ) <br><sub>Count the number of bits that are set to 1 in a 32 bit integer.</sub> | | unsigned int __popc ( unsigned int x ) <br><sub>Count the number of bits that are set to 1 in a 32 bit integer.</sub> |
| int __popcll ( unsigned long long int x )<br><sub>Count the number of bits that are set to 1 in a 64 bit integer.</sub> | | int __popcll ( unsigned long long int x )<br><sub>Count the number of bits that are set to 1 in a 64 bit integer.</sub> |
| int __mul24 ( int x, int y )<br><sub>Multiply two 24bit integers.</sub> |
| unsigned int __umul24 ( unsigned int x, unsigned int y )<br><sub>Multiply two 24bit unsigned integers.</sub> |
<sub><b id="f3"><sup>[1]</sup></b> <sub><b id="f3"><sup>[1]</sup></b>
The hcc implementation of __ffs() and __ffsll() contains code to add a constant +1 to produce the ffs result format. The hcc implementation of __ffs() and __ffsll() contains code to add a constant +1 to produce the ffs result format.
For the cases where this overhead is not acceptable and programmer is willing to specialize for the platform, For the cases where this overhead is not acceptable and programmer is willing to specialize for the platform,