Things about how to implement uint64_t and int64_t

[lygstate]

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[kphillisjr]

I believe the title for this does not help. A better title would be Suggestion: Add uint64 and int64 data types. As far as implementation goes, This changes in various cases...

• Case 1: X86 Systems - Any system that Implements Streaming SIMD Extensions 2 (SSE2) supports 64-bit math natively.
• Case 2: PowerPC - This is difficult to pinpoint, but if the chip implements AltiVec, it probably has native 64-bit math.
• Case 3: ARM SoC - The arithmatic units on these vary depending on which core is used. Some cores lack 64-bit results.
• Case 4: MIPS Systems - Generally anything implementing MIPS III or newer has 64-bit arithmetic support.