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pan/bi: Mark some instructions as unused

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Certain transcendental instructions are not even possible to generate
since these bits are lowered away before the Bifrost backend is touched,
as far as I know.

Job management instructions (most interestingly DOORBELL) do not
correspond to OpenGL/OpenCL/Vulkan.

Segment arithmetic seems mostly useless for real code, any actual use
case I can think of is already covered by indirect loads/stores which
does the segment arithmetic implicitly. I've never seen this in blob
code, probably just a future proofing thing.

Dropping these instructions corresponds to a 3% reduction in generated
lines of code for the printer, builder, and packer for the new IR. Not a
terrible yield for functionality we'll likely never need.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8213>
This commit is contained in:
Alyssa Rosenzweig 2020-12-06 22:44:06 -05:00 • committed by Marge Bot
parent b45978c8e1
commit 6d81df6e0c
1 changed files with 14 additions and 14 deletions
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28
src/panfrost/bifrost/ISA.xml
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@ -2319,7 +2319,7 @@
</mod>
</ins>
<ins name="*SEG_ADD" mask="0x7fff40" exact="0x701500">
<ins name="*SEG_ADD" mask="0x7fff40" exact="0x701500" unused="true">
<src start="0" mask="0xfb"/>
<mod name="seg" start="3" size="3">
<reserved/>
@ -2334,7 +2334,7 @@
<mod name="preserve_null" start="7" size="1" opt="preserve_null"/>
</ins>
<ins name="*SEG_SUB" mask="0x7fff40" exact="0x701540">
<ins name="*SEG_SUB" mask="0x7fff40" exact="0x701540" unused="true">
<src start="0" mask="0xfb"/>
<mod name="seg" start="3" size="3">
<reserved/>
@ -3823,11 +3823,11 @@
</swap>
</ins>
<ins name="+DOORBELL" mask="0xffff8" exact="0xd7860">
<ins name="+DOORBELL" mask="0xffff8" exact="0xd7860" unused="true">
<src start="0"/>
</ins>
<ins name="+EUREKA" mask="0xffff8" exact="0xd7850">
<ins name="+EUREKA" mask="0xffff8" exact="0xd7850" unused="true">
<src start="0"/>
</ins>
@ -4115,7 +4115,7 @@
</derived>
</ins>
<ins name="+FATAN_ASSIST.f16" mask="0xfff00" exact="0x67800">
<ins name="+FATAN_ASSIST.f16" mask="0xfff00" exact="0x67800" unused="true">
<src start="0" mask="0xf7"/>
<src start="3" mask="0xf7"/>
<mod name="lane1" start="6" size="1" default="h0">
@ -4128,12 +4128,12 @@
</mod>
</ins>
<ins name="+FATAN_ASSIST.f32" mask="0xfffc0" exact="0x67a00">
<ins name="+FATAN_ASSIST.f32" mask="0xfffc0" exact="0x67a00" unused="true">
<src start="0" mask="0xf7"/>
<src start="3" mask="0xf7"/>
</ins>
<ins name="+FATAN_TABLE.f16" mask="0xfff00" exact="0x67900">
<ins name="+FATAN_TABLE.f16" mask="0xfff00" exact="0x67900" unused="true">
<src start="0" mask="0xf7"/>
<src start="3" mask="0xf7"/>
<mod name="lane1" start="6" size="1" default="h0">
@ -4146,7 +4146,7 @@
</mod>
</ins>
<ins name="+FATAN_TABLE.f32" mask="0xfffc0" exact="0x67a40">
<ins name="+FATAN_TABLE.f32" mask="0xfffc0" exact="0x67a40" unused="true">
<src start="0" mask="0xf7"/>
<src start="3" mask="0xf7"/>
</ins>
@ -4668,7 +4668,7 @@
</mod>
</ins>
<ins name="+FRCBRT_APPROX_A.f32">
<ins name="+FRCBRT_APPROX_A.f32" unused="true">
<src start="0" mask="0xf7"/>
<mod name="widen0" size="2">
<opt>none</opt>
@ -4690,11 +4690,11 @@
</encoding>
</ins>
<ins name="+FRCBRT_APPROX_B.f32" mask="0xffff8" exact="0x67ab0">
<ins name="+FRCBRT_APPROX_B.f32" mask="0xffff8" exact="0x67ab0" unused="true">
<src start="0" mask="0xf7"/>
</ins>
<ins name="+FRCBRT_APPROX_C.f32" mask="0xffff8" exact="0x67ab8">
<ins name="+FRCBRT_APPROX_C.f32" mask="0xffff8" exact="0x67ab8" unused="true">
<src start="0" mask="0xf7"/>
</ins>
@ -6157,7 +6157,7 @@
<src start="6" mask="0xf7"/>
</ins>
<ins name="+KABOOM" mask="0xffff8" exact="0xd7858">
<ins name="+KABOOM" mask="0xffff8" exact="0xd7858" unused="true">
<src start="0"/>
</ins>
@ -7451,7 +7451,7 @@
</mod>
</ins>
<ins name="+SEG_ADD" mask="0xfff40" exact="0x3d500">
<ins name="+SEG_ADD" mask="0xfff40" exact="0x3d500" unused="true">
<src start="0"/>
<mod name="seg" start="3" size="3">
<reserved/>
@ -7466,7 +7466,7 @@
<mod name="preserve_null" start="7" size="1" opt="preserve_null"/>
</ins>
<ins name="+SEG_SUB" mask="0xfff40" exact="0x3d540">
<ins name="+SEG_SUB" mask="0xfff40" exact="0x3d540" unused="true">
<src start="0"/>
<mod name="seg" start="3" size="3">
<reserved/>