From: Eric Anholt Date: Thu, 11 Apr 2019 16:49:13 +0000 (-0700) Subject: nir: Add a comment about how intrinsic definitions work. X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=b88ef3bd76a1fad3c2a99ea19df62f7be8c57961;p=mesa.git nir: Add a comment about how intrinsic definitions work. I was thinking about a refactor, and needed to read this first. Reviewed-by: Jason Ekstrand --- diff --git a/src/compiler/nir/nir_intrinsics.py b/src/compiler/nir/nir_intrinsics.py index 1b4fcf9f98b..9b3f480f7af 100644 --- a/src/compiler/nir/nir_intrinsics.py +++ b/src/compiler/nir/nir_intrinsics.py @@ -128,6 +128,17 @@ CAN_REORDER = "NIR_INTRINSIC_CAN_REORDER" INTR_OPCODES = {} +# Defines a new NIR intrinsic. By default, the intrinsic will have no sources +# and no destination. +# +# You can set dest_comp=n to enable a destination for the intrinsic, in which +# case it will have that many components, or =0 for "as many components as the +# NIR destination value." +# +# Set src_comp=n to enable sources for the intruction. It can be an array of +# component counts, or (for convenience) a scalar component count if there's +# only one source. If a component count is 0, it will be as many components as +# the intrinsic has based on the dest_comp. def intrinsic(name, src_comp=[], dest_comp=-1, indices=[], flags=[], sysval=False, bit_sizes=[]): assert name not in INTR_OPCODES