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Core/Misc: update g3dlite lib (#2904)

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* Core/Misc: update g3dlite lib

* update

Co-authored-by: Francesco Borzì <borzifrancesco@gmail.com>
This commit is contained in:
Viste
2020-07-30 13:35:45 +03:00
committed by GitHub
parent 91bbbf08eb
commit fcaf91b8b2
183 changed files with 13258 additions and 8022 deletions
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24
deps/g3dlite/source/g3dmath.cpp vendored
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@@ -10,6 +10,7 @@
#include "G3D/g3dmath.h"
#include <cstdlib>
#include <cstring>
#include "G3D/BIN.h"
namespace G3D {
@@ -40,14 +41,27 @@ double inf() {
return std::numeric_limits<double>::infinity();
}
// --fast-math breaks other methods of testing for NaN on g++ 4.x,
// including isnan(x) and !(x == x)
bool isNaN(float x) {
static const float n = fnan();
return memcmp(&x, &n, sizeof(float)) == 0;
// Wipe out the sign bit
const uint32 y = *(uint32*)(&x) & BIN32(01111111,11111111,11111111,11111111);
// If the remaining number has all of the exponent bits set and atleast one
// fraction bit set, then it is NaN
return (y > 0x7F800000);
}
bool isNaN(double x) {
static const double n = nan();
return memcmp(&x, &n, sizeof(double)) == 0;
// Wipe out the sign bit
const uint64 y = *(uint64*)(&x) &
((uint64(BIN32(01111111,11111111,11111111,11111111)) << 32) +
0xFFFFFFFF);
// If the remaining number has all of the exponent bits set and atleast one
// fraction bit set, then it is NaN
return (y > (uint64(BIN32(01111111,11110000,00000000,00000000)) << 32));
}
@@ -75,7 +89,7 @@ int highestBit(uint32 x) {
// Binary search.
int base = 0;
if (x & 0xffff0000) {
if (x & 0xffff0000) {
base = 16;
x >>= 16;
}