Difference between revisions of "Instruction Set/left"

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{{DISPLAYTITLE:left}}
 
{{DISPLAYTITLE:left}}
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<div style="font-size:80%;line-height:90%;margin-bottom:2em">[[Speculation|realizing]]&nbsp;&nbsp;[[Encoding|exu stream]]&nbsp;&nbsp;[[Decode|exu block]]&nbsp;&nbsp;[[Phasing|compute phase]]&nbsp;&nbsp; operation&nbsp;&nbsp; [[Domains|in the logical value domain]]&nbsp;&nbsp;<br />
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<div style="font-size:80%;line-height:90%;margin-bottom:2em">[[Speculation|speculable]]&nbsp;&nbsp;[[Encoding|exu stream]]&nbsp;&nbsp;[[Decode|exu block]]&nbsp;&nbsp;[[Phasing|compute phase]]&nbsp;&nbsp; operation&nbsp;&nbsp; [[Domains|in the logical value domain]]&nbsp;&nbsp;<br />
 
'''native on:''' [[Cores|all]]<br />
 
'''native on:''' [[Cores|all]]<br />
 
</div>
 
</div>
  
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construct a bool vector with N leading false, or count leading false in a bool vector
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Count leading false in or construct bool vector with leading false.
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----
 
----
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<code style="font-size:130%"><b style="color:#050">left</b>(<span style="color:#009">[[Domains#op|op]]</span> <span title="belt operand from ops window">x</span>) &#8594; [[Domains#op|op]] r<sub>0</sub></code>
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<code style="font-size:130%"><b style="color:#050">left</b>(<span style="color:#009">[[Domains#op|op]]</span> <span title="belt operand from ops window">v</span>) &#8594; [[Domains#op|op]] r<sub>0</sub></code>
 
<div style="font-size:80%;line-height:90%;margin-bottom:2em">'''operands:''' [[Operands#likeLeftv|like Leftv XX:i]]
 
<div style="font-size:80%;line-height:90%;margin-bottom:2em">'''operands:''' [[Operands#likeLeftv|like Leftv XX:i]]
 
</div>
 
</div>
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<br />
+
This counts the leading false elements in a bool vector.<br />
  
 
{| class="mw-collapsible mw-collapsed wikitable" data-expandtext="&#9656;" data-collapsetext="&#9662;"
 
{| class="mw-collapsible mw-collapsed wikitable" data-expandtext="&#9656;" data-collapsetext="&#9662;"
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| [[Cores/Tin/Encoding#left|Tin]] || E0 || 1
 
| [[Cores/Tin/Encoding#left|Tin]] || E0 || 1
 
|-
 
|-
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| [[Cores/Copper/Encoding#left|Copper]] || E0 E1 || 1
+
| [[Cores/Copper/Encoding#left|Copper]] || E0 || 1
 
|-
 
|-
 
| [[Cores/Silver/Encoding#left|Silver]] || E0 E1 E2 E3 || 1
 
| [[Cores/Silver/Encoding#left|Silver]] || E0 E1 E2 E3 || 1
 
|-
 
|-
−
| [[Cores/Gold/Encoding#left|Gold]] || E0 E1 E2 E3 E4 E5 E6 E7 || 1
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| [[Cores/Gold/Encoding#left|Gold]] || E0 || 1
−
|-
+
−
| [[Cores/Decimal8/Encoding#left|Decimal8]] || E0 E1 E2 E3 || 1
+
−
|-
+
−
| [[Cores/Decimal16/Encoding#left|Decimal16]] || E0 E1 E2 E3 || 1
+
 
|}
 
|}
  
 
----
 
----
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<code style="font-size:130%"><b style="color:#050">left</b>(<span style="color:#009">[[Domains#op|op]]</span> <span title="belt operand from ops window">x</span>, <i><span style="color:#009">[[Immediates#width|width]]</span> <span title="data width and scalarity (exu)">w</span></i>) &#8594; [[Domains#op|op]] r<sub>0</sub></code>
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<code style="font-size:130%"><b style="color:#050">left</b>(<span style="color:#009">[[Domains#op|op]]</span> <span title="belt operand from ops window">x</span>, <i><span style="color:#009">[[Immediates#width|width]]</span> <span title="data width and vector length (exu)">w</span></i>) &#8594; [[Domains#op|op]] r<sub>0</sub></code>
 
<div style="font-size:80%;line-height:90%;margin-bottom:2em">'''operands:''' [[Operands#likeLefts|like Lefts xx:X]]
 
<div style="font-size:80%;line-height:90%;margin-bottom:2em">'''operands:''' [[Operands#likeLefts|like Lefts xx:X]]
 
</div>
 
</div>
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<br />
+
Constructs a bool vector with w elements of which the leading x elements are false and the rest true.<br />
  
 
{| class="mw-collapsible mw-collapsed wikitable" data-expandtext="&#9656;" data-collapsetext="&#9662;"
 
{| class="mw-collapsible mw-collapsed wikitable" data-expandtext="&#9656;" data-collapsetext="&#9662;"
 
! [[Cores|Core]] || [[Slot|In Slots]]|| [[Latency|Latencies]]
 
! [[Cores|Core]] || [[Slot|In Slots]]|| [[Latency|Latencies]]
 
|-
 
|-
−
| [[Cores/Tin/Encoding#left|Tin]] || E0 || 1
+
| [[Cores/Tin/Encoding#left|Tin]] || E0 ||  
−
|-
+
−
| [[Cores/Copper/Encoding#left|Copper]] || E0 E1 || 1
+
−
|-
+
−
| [[Cores/Silver/Encoding#left|Silver]] || E0 E1 E2 E3 || 1
+
 
|-
 
|-
−
| [[Cores/Gold/Encoding#left|Gold]] || E0 E1 E2 E3 E4 E5 E6 E7 || 1
+
| [[Cores/Copper/Encoding#left|Copper]] || E0 ||  
 
|-
 
|-
−
| [[Cores/Decimal8/Encoding#left|Decimal8]] || E0 E1 E2 E3 || 1
+
| [[Cores/Silver/Encoding#left|Silver]] || E0 E1 E2 E3 ||  
 
|-
 
|-
−
| [[Cores/Decimal16/Encoding#left|Decimal16]] || E0 E1 E2 E3 || 1
+
| [[Cores/Gold/Encoding#left|Gold]] || E0 ||  
 
|}
 
|}
  
  
 
[[Instruction_Set|Instruction Set, alphabetical]], [[Instruction Set by Category]], [http://millcomputing.com/instructions.html?collapse=7#ops Instruction Set, sortable, filterable]
 
[[Instruction_Set|Instruction Set, alphabetical]], [[Instruction Set by Category]], [http://millcomputing.com/instructions.html?collapse=7#ops Instruction Set, sortable, filterable]

Latest revision as of 14:00, 23 February 2021

speculable  exu stream  exu block  compute phase   operation   in the logical value domain  

native on: all

Count leading false in or construct bool vector with leading false.

left(op v) → op r0

operands: like Leftv XX:i

This counts the leading false elements in a bool vector.

Core In Slots Latencies
Tin E0 1
Copper E0 1
Silver E0 E1 E2 E3 1
Gold E0 1

left(op x, width w) → op r0

operands: like Lefts xx:X

Constructs a bool vector with w elements of which the leading x elements are false and the rest true.

Core In Slots Latencies
Tin E0
Copper E0
Silver E0 E1 E2 E3
Gold E0


Instruction Set, alphabetical, Instruction Set by Category, Instruction Set, sortable, filterable

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