Re: Hex to ascii


Terje Mathisen wrote:
Jean-François Michaud wrote:
Terje Mathisen wrote:
In 32-bit mode the difference is even larger, the code AMD "borrowed"
converts a full 32-bit unsigned integer to 10 decimal digits in less
time than the cpu needs for a single DIV opcode! :-)

Terje

How about a lookup table?

Lookup tables are indeed good here, in fact they should be the obvious
choice. :-)

However, when working with more digits and/or parallel operations,
straight inline SIMD code tends to beat lookup tables due to the load
stage bottleneck.

Hmm possibly but thats assuming alot ;-). Most processors out there
don't have the SIMD instruction set/registers.

Regards
Jean-Francois Michaud

.

Relevant Pages

  • Re: Hex to ascii
    ... converts a full 32-bit unsigned integer to 10 decimal digits in less ... time than the cpu needs for a single DIV opcode! ... Lookup tables are indeed good here, in fact they should be the obvious choice. ...
    (comp.lang.asm.x86)
  • Re: vlookup problem, possibly due to "noise"
    ... have in your lookup table that, after displaying 20+ decimal digits, ... rounding functions: you thought you had 2.01 and in reality it was ... not are the numbers in the key column of the lookup table ordered ...
    (microsoft.public.excel.worksheet.functions)