narrowde
From Mill Computing Wiki
realizing exu stream exu block compute phase operation in the decimal floating point value domain and rounds to nearest, ties toward even adjacent value
Half the width of a decimal float value. Rounding to nearest even.
Can produce the IEEE 754 32bit decimal float interchange format.
This is not a Speculable operation. The reason for this is the impossibility to fit all of the NaR payload into values smaller than 32bit. Nominally this would only require the narrowing of 32bit values to be not speculable, but for simplicity reasons in hardware and compiler this is not so. If narrowing should prove a big bottleneck this can be revisited.
operands: like Narrowd [dd:½d]
| Core | In Slots | Latencies |
|---|---|---|
| Decimal8 | E0 E1 | d:w=4 q:d=5 |
| Decimal16 | E0 E1 | d:w=4 q:d=5 |
operands: like Narrowvd [DD:½D]
| Core | In Slots | Latencies |
|---|---|---|
| Decimal8 | E0 E1 | dv,dv:wv=4 qv,qv:dv=5 |
| Decimal16 | E0 E1 | dv,dv:wv=4 qv,qv:dv=5 |
Instruction Set, alphabetical, Instruction Set by Category, Instruction Set, sortable, filterable
