Difference between revisions of "Instruction Set/negss"
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{{DISPLAYTITLE:negss}} | {{DISPLAYTITLE:negss}} | ||
| − | <div style="font-size:80%;line-height:90%;margin-bottom:2em">[[Speculation| | + | <div style="font-size:80%;line-height:90%;margin-bottom:2em">[[Speculation|speculable]] [[Encoding|exu stream]] [[Decode|exu block]] [[Phasing|compute phase]] operation [[Domains|in the signed integer value domain]] [[Overflow|using saturating overflow behavior]] [[Condition Code|that produces condition codes]]<br /> |
'''aliases:''' negssv <br /> | '''aliases:''' negssv <br /> | ||
'''native on:''' [[Cores|all]]<br /> | '''native on:''' [[Cores|all]]<br /> | ||
</div> | </div> | ||
| − | + | Integer arithmetic negation. Saturating overflow. | |
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| + | For arithmetic negation in two complement values the only value that can overflow is the smallest possible number for the width. In saturating overflow it it becomes |x|-1. | ||
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---- | ---- | ||
<code style="font-size:130%"><b style="color:#050">negss</b>(<span style="color:#009">[[Domains#s|s]]</span> <span title="belt operand from ops window">x</span>) → [[Domains#s|s]] r<sub>0</sub></code> | <code style="font-size:130%"><b style="color:#050">negss</b>(<span style="color:#009">[[Domains#s|s]]</span> <span title="belt operand from ops window">x</span>) → [[Domains#s|s]] r<sub>0</sub></code> | ||
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! [[Cores|Core]] || [[Slot|In Slots]]|| [[Latency|Latencies]] | ! [[Cores|Core]] || [[Slot|In Slots]]|| [[Latency|Latencies]] | ||
|- | |- | ||
| − | | [[Cores/Tin/Encoding# | + | | [[Cores/Tin/Encoding#negss|Tin]] || E0 || 2 |
|- | |- | ||
| − | | [[Cores/Copper/Encoding# | + | | [[Cores/Copper/Encoding#negss|Copper]] || E0 E1 || 2 |
|- | |- | ||
| − | | [[Cores/Silver/Encoding# | + | | [[Cores/Silver/Encoding#negss|Silver]] || E0 E1 E2 E3 || 2 |
|- | |- | ||
| − | | [[Cores/Gold/Encoding# | + | | [[Cores/Gold/Encoding#negss|Gold]] || E0 E1 E2 E3 E4 E5 E6 E7 || 2 |
|- | |- | ||
| − | | [[Cores/Decimal8/Encoding# | + | | [[Cores/Decimal8/Encoding#negss|Decimal8]] || E0 E1 E2 E3 || 2 |
|- | |- | ||
| − | | [[Cores/Decimal16/Encoding# | + | | [[Cores/Decimal16/Encoding#negss|Decimal16]] || E0 E1 E2 E3 || 2 |
|} | |} | ||
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| + | [[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 09:27, 9 February 2015
speculable exu stream exu block compute phase operation in the signed integer value domain using saturating overflow behavior that produces condition codes
aliases: negssv
native on: all
Integer arithmetic negation. Saturating overflow.
For arithmetic negation in two complement values the only value that can overflow is the smallest possible number for the width. In saturating overflow it it becomes |x|-1.
operands: like Identity [xx:x]
| Core | In Slots | Latencies |
|---|---|---|
| Tin | E0 | 2 |
| Copper | E0 E1 | 2 |
| Silver | E0 E1 E2 E3 | 2 |
| Gold | E0 E1 E2 E3 E4 E5 E6 E7 | 2 |
| Decimal8 | E0 E1 E2 E3 | 2 |
| Decimal16 | E0 E1 E2 E3 | 2 |
Instruction Set, alphabetical, Instruction Set by Category, Instruction Set, sortable, filterable
