KonstantinSeurer
/
mesa
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

pan/va: Rename RSCALE to LDEXP 

This avoids needless variation from Bifrost. While at it, fix the opcode
definition: there are no abs/neg/swizzle modifiers on the signed integer source,
and there's no clamp. However, there are round and infinity modes, like on
Bifrost.

Signed-off-by: Alyssa Rosenzweig <alyssa@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17101>
This commit is contained in:
Alyssa Rosenzweig 2022-06-17 11:34:51 -04:00 committed by Marge Bot
parent 0da28ee2c7
commit 21bedd2c97
1 changed files with 10 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
src/panfrost/bifrost/valhall/ISA.xml
View File

@ -1763,18 +1763,19 @@
<src absneg="true">B</src>
</group>
<group name="FRSCALE" title="Floating-point rescaling" dests="1" opcode2="6" unit="FMA">
<ins name="FRSCALE.f32" opcode="0xA4"/>
<ins name="FRSCALE.v2f16" opcode="0xA5"/>
<group name="LDEXP" title="Floating-point rescaling" dests="1" opcode2="6" unit="FMA">
<ins name="LDEXP.f32" opcode="0xA4"/>
<ins name="LDEXP.v2f16" opcode="0xA5"/>
<desc>
Computes $A \cdot 2^B$ by adding B to the exponent of A. Used to calculate
various special functions, particularly base-2 exponents. Special case
handling differs from an actual floating-point multiply, so this should
not be used outside fixed instruction sequences.
</desc>
<clamp/>
<src absneg="true" swizzle="true">A</src>
<src absneg="true" swizzle="true">B</src>
<src/>
<roundmode/> <!-- Also has rtna -->
<!-- Also has infinity handling for arctan -->
</group>
<ins name="FEXP.f32" title="Floating-point exponent" dests="1" opcode="0xA4" opcode2="8" unit="SFU">
@ -2648,7 +2649,7 @@
special transcendental function sequences. It should not be used for
general code as its special case handling differs from two back-to-back
`FMA.f32` operations. Equivalent to `FMA.f32` back-to-back with
`RSCALE.f32`
`LDEXP.f32`
</desc>
<clamp/>
<src absneg="true">A</src>
@ -2664,7 +2665,7 @@
ordinary multiply would return NaN. Used in special transcendental
function sequences. It should not be used for general code as its special
case handling differs from two back-to-back `FMA.f32` operations.
Equivalent to `FMA.f32` back-to-back with `RSCALE.f32`
Equivalent to `FMA.f32` back-to-back with `LDEXP.f32`
</desc>
<clamp/>
<src absneg="true">A</src>
@ -2680,7 +2681,7 @@
ordinary multiply would return NaN. Used in special transcendental
function sequences. It should not be used for general code as its special
case handling differs from two back-to-back `FMA.f32` operations.
Equivalent to `FMA.f32` back-to-back with `RSCALE.f32`
Equivalent to `FMA.f32` back-to-back with `LDEXP.f32`
</desc>
<clamp/>
<src absneg="true">A</src>
@ -2695,7 +2696,7 @@
interpreted as a 16-bit value. Used in special transcendental function
sequences. It should not be used for general code as its special case
handling differs from two back-to-back `FMA.f32` operations. Equivalent
to `FMA.f32` back-to-back with `RSCALE.f32`
to `FMA.f32` back-to-back with `LDEXP.f32`
</desc>
<clamp/>
<src absneg="true">A</src>