nme-toolkit angle crashes on popcnt (MacPro 1,1 / 2,1 / 3,1)

[madrazo]

This issue only occurs if you are using an old Xeon processor X5100, X5300, X5400... which are used on the original MacPro s, servers and PCs that mod them to fit into lga 775. They lack of the POPCNT (SSE 4.2) instruction.

The call is in nme-tools angle call to __popcnt in src/common/mathutil.h

My workaround on current code is just to check if popcnt is available

inline int BitCount(uint32_t bits)
{
    uint32_t cpuInfo[4];
    __cpuid((int*)cpuInfo, 0x00000001);
    return (bool)((cpuInfo[2] >> 23) & 1) ? static_cast<int>(__popcnt(bits)) : BitCountPolyfill(bits);
}

The issue has been fixed in angle https://bugs.chromium.org/p/angleproject/issues/detail?id=4462
However compiling newer angle gives me memory errors on VS2007. Workarounds that I had found is to use the 64 bit compiler instead of the 32_64 cross compiler or updgrade to VS2019. I will have to try this again.