From: Chad Versace Date: Wed, 9 Jan 2013 19:40:29 +0000 (-0800) Subject: i965: Quote the PRM on a HorzStride subtlety X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=7093558b311b223004845d0a422eb88bed15b418;p=mesa.git i965: Quote the PRM on a HorzStride subtlety Reviewed-by: Ian Romanick Signed-off-by: Chad Versace --- diff --git a/src/mesa/drivers/dri/i965/brw_eu_emit.c b/src/mesa/drivers/dri/i965/brw_eu_emit.c index fecbff15d65..b34754a9cfc 100644 --- a/src/mesa/drivers/dri/i965/brw_eu_emit.c +++ b/src/mesa/drivers/dri/i965/brw_eu_emit.c @@ -126,7 +126,10 @@ brw_set_dest(struct brw_compile *p, struct brw_instruction *insn, else { insn->bits1.da16.dest_subreg_nr = dest.subnr / 16; insn->bits1.da16.dest_writemask = dest.dw1.bits.writemask; - /* even ignored in da16, still need to set as '01' */ + /* From the Ivybridge PRM, Vol 4, Part 3, Section 5.2.4.1: + * Although Dst.HorzStride is a don't care for Align16, HW needs + * this to be programmed as "01". + */ insn->bits1.da16.dest_horiz_stride = 1; } }