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But wouldn't it be sweet to have SIMD acceleration for fixed point? Or is that something you can do with integers and SIMD today? Say 4x4 matrix multiplicatio
by bullen 5y ago
But wouldn't it be sweet to have SIMD acceleration for fixed point?
Or is that something you can do with integers and SIMD today?
Say 4x4 matrix multiplication?
- adgjlsfhk1 5y agoyour add is just an integer add. your multiply is a mul_hi, 2 shifts, 1 add and 1 mul.
- bullen 5y agoI know some of those words, but still I'm curious as to why OpenGL has not explored fixed for 3D graphics?
- adwn 5y agoHaving implemented a nested PID controller using fixed-point arithmetic in an FPGA, I can tell you that fixed-point is a pain in the ass, and you only use it when floating-point is too slow, too large (in terms of on-chip resources), or consumes too much power, or when you really need to control the precision going into and out of an arithmetic operation.
- mhh__ 5y agoAre you asking if integer SIMD exists? (It does)