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i965: Add assertion for src_stencil payload size

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This helps address a coverity warning and prevents future questions about this
code.

Reported-by: Coverity (via Ilia)
Cc: Ilia Mirkin <imirkin@alum.mit.edu>
Signed-off-by: Ben Widawsky <benjamin.widawsky@intel.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
This commit is contained in:
Ben Widawsky 2015-11-16 17:23:01 -08:00
parent 2bec154b47
commit c531d40927
1 changed files with 6 additions and 0 deletions
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6
src/mesa/drivers/dri/i965/brw_fs.cpp
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@ -3603,6 +3603,12 @@ lower_fb_write_logical_send(const fs_builder &bld, fs_inst *inst,
assert(devinfo->gen >= 9);
assert(bld.dispatch_width() != 16);
/* XXX: src_stencil is only available on gen9+. dst_depth is never
* available on gen9+. As such it's impossible to have both enabled at the
* same time and therefore length cannot overrun the array.
*/
assert(length < 15);
sources[length] = bld.vgrf(BRW_REGISTER_TYPE_UD);
bld.exec_all().annotate("FB write OS")
.emit(FS_OPCODE_PACK_STENCIL_REF, sources[length],