Difference between revisions of "Instruction Set/rootu"

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m (Protected "Instruction Set/rootu": generated ([Edit=<protect-level-bot>] (indefinite) [Move=<protect-level-bot>] (indefinite)))
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square root
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Unsigned integer square root. Helper operation for software square root implementation.
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This operation creates a seed value for Newton-Rapheson, or other, iterative methods.
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<code style="font-size:130%"><b style="color:#050">rootu</b>(<span style="color:#009">[[Domains#u|u]]</span> <span title="belt operand from ops window">x</span>) &#8594; [[Domains#u|u]] r<sub>0</sub></code>
 
<code style="font-size:130%"><b style="color:#050">rootu</b>(<span style="color:#009">[[Domains#u|u]]</span> <span title="belt operand from ops window">x</span>) &#8594; [[Domains#u|u]] r<sub>0</sub></code>

Revision as of 10:48, 19 January 2015

realizing  exu stream  exu block  compute phase   operation   in the unsigned integer value domain   that produces condition codes

native on: all

Unsigned integer square root. Helper operation for software square root implementation.

This operation creates a seed value for Newton-Rapheson, or other, iterative methods.


rootu(u x) → u r0

operands: like Identity [xx:x]


Core In Slots Latencies
Tin E0 b:b=1 bv:bv=1 h:h=1 hv:hv=1 w:w=1 wv:wv=1 d:d=2 dv:dv=2 q:q=2 qv:qv=2
Copper E0 E1 b:b=1 bv:bv=1 h:h=1 hv:hv=1 w:w=1 wv:wv=1 d:d=2 dv:dv=2 q:q=2 qv:qv=2
Silver E0 E1 E2 E3 b:b=1 bv:bv=1 h:h=1 hv:hv=1 w:w=1 wv:wv=1 d:d=2 dv:dv=2 q:q=2 qv:qv=2
Gold E0 E1 E2 E3 E4 E5 E6 E7 b:b=1 bv:bv=1 h:h=1 hv:hv=1 w:w=1 wv:wv=1 d:d=2 dv:dv=2 q:q=2 qv:qv=2
Decimal8 E0 E1 E2 E3 b:b=1 bv:bv=1 h:h=1 hv:hv=1 w:w=1 wv:wv=1 d:d=2 dv:dv=2 q:q=2 qv:qv=2
Decimal16 E0 E1 E2 E3 b:b=1 bv:bv=1 h:h=1 hv:hv=1 w:w=1 wv:wv=1 d:d=2 dv:dv=2 q:q=2 qv:qv=2


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