fdo-mirrors/mesa
1
0
Fork 0
mirror of https://gitlab.freedesktop.org/mesa/mesa.git synced 2025-12-29 21:00:16 +01:00
Code Issues Projects Releases Packages Wiki Activity Actions 2

intel/fs: Fix destination suboffset calculations for non-trivial strides in SHUFFLE codegen.

Browse source 
One of the two SHUFFLE implementations wasn't taking into account the
destination stride at all, and the other (more commonly used) one was
taking it into account incorrectly since brw_reg::hstride represents
the stride logarithmically, so we need to use a left-shift operator
instead of product.  Found by inspection.

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/14273>
This commit is contained in:
Francisco Jerez 2021-12-20 14:49:02 -08:00 • committed by Marge Bot
parent d1038197f3
commit d2d72fccf1
1 changed files with 2 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
src/intel/compiler/brw_fs_generator.cpp
View file

@ -631,7 +631,7 @@ fs_generator::generate_shuffle(fs_inst *inst,
*/
const unsigned i = idx.file == BRW_IMMEDIATE_VALUE ? idx.ud : 0;
struct brw_reg group_src = stride(suboffset(src, i), 0, 1, 0);
struct brw_reg group_dst = suboffset(dst, group);
struct brw_reg group_dst = suboffset(dst, group << (dst.hstride - 1));
if (type_sz(src.type) > 4 && !devinfo->has_64bit_float) {
brw_MOV(p, subscript(group_dst, BRW_REGISTER_TYPE_UD, 0),
subscript(group_src, BRW_REGISTER_TYPE_UD, 0));
@ -743,7 +743,7 @@ fs_generator::generate_shuffle(fs_inst *inst,
brw_MOV(p, byte_offset(dst_d, 4),
retype(brw_VxH_indirect(0, 4), BRW_REGISTER_TYPE_D));
} else {
brw_MOV(p, suboffset(dst, group * dst.hstride),
brw_MOV(p, suboffset(dst, group << (dst.hstride - 1)),
retype(brw_VxH_indirect(0, 0), src.type));
}
}