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i965: Make convert_attr_sources_to_hw_regs handle stride == 0.

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This makes expressions like component(fs_reg(ATTR, n), 7) get a proper
<0,1,0> region instead of the invalid <0,8,0>.

Nobody uses this today, but I plan to.

v2: Rebase on Matt's changes; simplify.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Matt Turner <mattst88@gmail.com> [v1]
This commit is contained in:
Kenneth Graunke 2015-11-11 22:37:53 -08:00
parent 26f9469a46
commit f88c175a29
1 changed files with 2 additions and 1 deletions
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3
src/mesa/drivers/dri/i965/brw_fs.cpp
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@ -1614,11 +1614,12 @@ fs_visitor::convert_attr_sources_to_hw_regs(fs_inst *inst)
inst->src[i].nr +
inst->src[i].reg_offset;
unsigned width = inst->src[i].stride == 0 ? 1 : inst->exec_size;
struct brw_reg reg =
stride(byte_offset(retype(brw_vec8_grf(grf, 0), inst->src[i].type),
inst->src[i].subreg_offset),
inst->exec_size * inst->src[i].stride,
inst->exec_size, inst->src[i].stride);
width, inst->src[i].stride);
reg.abs = inst->src[i].abs;
reg.negate = inst->src[i].negate;