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Added testpow2 test, and use improved version. Issue #184.

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Branimir Karadžić
2018-05-30 12:58:47 -07:00
parent 7a10c90e1a
commit e930ad8fa1
2 changed files with 18 additions and 6 deletions
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10
include/bx/inline/uint32_t.inl
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@@ -453,12 +453,10 @@ namespace bx
inline uint32_t uint32_testpow2(uint32_t _a)
{
const uint32_t tmp0 = uint32_not(_a);
const uint32_t tmp1 = uint32_inc(tmp0);
const uint32_t tmp2 = uint32_and(_a, tmp1);
const uint32_t tmp3 = uint32_cmpeq(tmp2, _a);
const uint32_t tmp4 = uint32_cmpneq(_a, 0);
const uint32_t result = uint32_and(tmp3, tmp4);
const uint32_t tmp0 = uint32_dec(_a);
const uint32_t tmp1 = uint32_xor(_a, tmp0);
const uint32_t tmp2 = uint32_srl(tmp1, 1);
const uint32_t result = uint32_cmpeq(tmp2, tmp0);
return result;
}