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pan/bi: Add full form of Valhall MUX instruction

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Like Bifrost.

Signed-off-by: Alyssa Rosenzweig <alyssa@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13802>
This commit is contained in:
Alyssa Rosenzweig 2021-11-15 18:18:55 -05:00 committed by Marge Bot
parent 855ab23d9a
commit 137053c4f4
1 changed files with 20 additions and 2 deletions
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22
src/panfrost/bifrost/valhall/ISA.xml
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@ -576,6 +576,20 @@
<value name="0x7C007C00">v2inf</value>
</enum>
<enum name="Mux">
<desc>
Condition to use for a `MUX` instruction. `neg` checks the sign bit,
`int_zero` compares to `0x00000000`, `fp_zero` compares to $\pm 0.0$ as
an IEEE 754 float, and `bit` checks each bit separately. The `bit` mode
acts like an imaginary `CSEL.v32i1` instruction, and implements
`bitselect()` in OpenCL.
</desc>
<value desc="Negative">neg</value>
<value desc="Integer zero" default="true">int_zero</value>
<value desc="Floating point zero">fp_zero</value>
<value desc="Bitwise">bit</value>
</enum>
<ins name="NOP" title="No operation" dests="0" opcode="0x00" unit="CVT">
<desc>
Do nothing. Useful at the start of a block for waiting on slots required
@ -1430,9 +1444,13 @@
<ins name="MUX.i32" title="Mux" dests="1" opcode="0xB8" unit="SFU">
<desc>
Mux between A and B based on the provided mask. Equivalent to
`bitselect()` in OpenCL. `(A &amp; mask) | (A &amp; ~mask)`
Mux between A and B based on the provided mask. The condition specified
as the `mux` modifier is evaluated on the mask. If true, `A` is chosen,
else `B` is chosen. The `bit` modifier acts bitwise, equivalent to
`bitselect()` in OpenCL, so `MUX.i32.bit A, B, mask` calculates
`(A &amp; mask) | (A &amp; ~mask)`.
</desc>
<mod name="mux" start="32" size="2"/>
<src>A</src>
<src>B</src>
<src>Mask</src>