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I read in wiki that ARM has a unique half precision standard and i want to know whether it's also true for mobile GPU like mali. I asked this because i do encounter a wired issue about half precision where same shade program with same data end with different result in different mobile gpu. The number i calculate in shader will be out of half precision range so it was supposed to be a NaN but instead its final output is NOT in some mali GPU while(i said some not all, cause in Mali-T830 the result is the same as other mobile gpu like in adreno or powervr while in Mali-G76, the result is different) . And i just curious whether it is related the ARM half standard I mentioned about. In wiki, it said"ARM alternative half-precision[edit]
ARM processors support (via a floating point control register bit) an "alternative half-precision" format, which does away with the special case for an exponent value of 31 (111112).[9] It is almost identical to the IEEE format, but there is no encoding for infinity or NaNs; instead, an exponent of 31 encodes normalized numbers in the range 65536 to 131008.
"(arm community warn me that i shouldn't put link in my post so i just paste the content here, just google "Half-precision floating-point format wiki" and you will find the original post)
Duplicate of https://community.arm.com/support-forums/f/graphics-gaming-and-vr-forum/51739/about-mali-half-hardware-standard
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