diff options
Diffstat (limited to 'src/utils')
| -rw-r--r-- | src/utils/mathutils.h | 21 |
1 files changed, 11 insertions, 10 deletions
diff --git a/src/utils/mathutils.h b/src/utils/mathutils.h index fdb919f7e..b8dcdef9b 100644 --- a/src/utils/mathutils.h +++ b/src/utils/mathutils.h @@ -28,7 +28,7 @@ #include "localconsts.h" -static const uint16_t crc_table[256] = +static constexpr const uint16_t crc_table[256] = { 0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50a5, 0x60c6, 0x70e7, 0x8108, 0x9129, 0xa14a, 0xb16b, 0xc18c, 0xd1ad, 0xe1ce, 0xf1ef, @@ -64,7 +64,7 @@ static const uint16_t crc_table[256] = 0x6e17, 0x7e36, 0x4e55, 0x5e74, 0x2e93, 0x3eb2, 0x0ed1, 0x1ef0 }; -static const uint8_t square_roots[1000] = +static constexpr const uint8_t square_roots[1000] = { 0, 1, 1, 1, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, @@ -119,12 +119,13 @@ static const uint8_t square_roots[1000] = }; inline uint16_t getCrc16(const std::string &str) A_WARN_UNUSED; -inline float fastInvSqrt(float x) A_WARN_UNUSED; -inline float fastSqrt(const float x) A_WARN_UNUSED; +constexpr inline float fastInvSqrt(float x) A_WARN_UNUSED; +constexpr inline float fastSqrt(const float x) A_WARN_UNUSED; constexpr inline float weightedAverage(const float n1, const float n2, const float w) A_WARN_UNUSED; constexpr inline int roundDouble(const double v) A_WARN_UNUSED; -inline int powerOfTwo(const unsigned int input) A_WARN_UNUSED; +constexpr inline int powerOfTwo(const unsigned int input) A_WARN_UNUSED; +constexpr inline int fastSqrtInt(const unsigned int n) A_WARN_UNUSED; inline uint16_t getCrc16(const std::string &str) { @@ -150,9 +151,9 @@ inline uint16_t getCrc16(const std::string &str) * Unfortunately the original creator of this function seems to be unknown. */ -inline float fastInvSqrt(float x) +constexpr inline float fastInvSqrt(float x) { - union { int i; float x; } tmp; + union { int i; float x; } tmp = {0U}; const float xhalf = 0.5F * x; tmp.x = x; tmp.i = 0x5f375a86 - (tmp.i >> 1); @@ -161,7 +162,7 @@ inline float fastInvSqrt(float x) return x; } -inline float fastSqrt(const float x) +constexpr inline float fastSqrt(const float x) { return 1.0F / fastInvSqrt(x); } @@ -177,7 +178,7 @@ constexpr inline int roundDouble(const double v) return (v > 0.0) ? static_cast<int>(v + 0.5) : static_cast<int>(v - 0.5); } -inline int powerOfTwo(const unsigned int input) +constexpr inline int powerOfTwo(const unsigned int input) { unsigned int value = 1; while (value < input) @@ -185,7 +186,7 @@ inline int powerOfTwo(const unsigned int input) return value; } -inline int fastSqrtInt(const unsigned int n) +constexpr inline int fastSqrtInt(const unsigned int n) { if (n < 1000) return static_cast<int>(square_roots[n]); |