383fbd050c
v2: don't use assume
check only for x<0, the other conditions are handled transparently
v3: don't check inputs at all, nan propagation works as expected
Reviewer: Jeroen Ketema
Signed-off-by: Jan Vesely <jan.vesely@rutgers.edu>
llvm-svn: 318204
6 lines
217 B
C++
6 lines
217 B
C++
_CLC_OVERLOAD _CLC_DEF __CLC_GENTYPE native_powr(__CLC_GENTYPE x, __CLC_GENTYPE y) {
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// x^y == 2^{log2 x^y} == 2^{y * log2 x}
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// for x < 0 propagate nan created by log2
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return native_exp2(y * native_log2(x));
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}
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