The code has been taken from vec4_visitor with minimum modifications.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=89580
---
src/mesa/drivers/dri/i965/brw_vec4_nir.cpp | 13 ++++++++++++-
1 file changed, 12 insertions(+), 1 deletion(-)
diff --git a/src/mesa/drivers/dri/i965/brw_vec4_nir.cpp
b/src/mesa/drivers/dri/i965/brw_vec4_nir.cpp
index b623c6d..9a31e6c 100644
--- a/src/mesa/drivers/dri/i965/brw_vec4_nir.cpp
+++ b/src/mesa/drivers/dri/i965/brw_vec4_nir.cpp
@@ -1617,7 +1617,18 @@ vec4_visitor::nir_emit_texture(nir_tex_instr *instr)
lod.swizzle = BRW_SWIZZLE_XXXX;
emit(MOV(dst_reg(MRF, param_base, lod.type, WRITEMASK_W), lod));
} else if (instr->op == nir_texop_txf_ms) {
- /* @TODO: not yet implemented */
+ emit(MOV(dst_reg(MRF, param_base + 1, sample_index.type, WRITEMASK_X),
+ sample_index));
+ if (devinfo->gen >= 7) {
+ /* MCS data is in the first channel of `mcs`, but we need to get
it into
+ * the .y channel of the second vec4 of params, so replicate .x
across
+ * the whole vec4 and then mask off everything except .y
+ */
+ mcs.swizzle = BRW_SWIZZLE_XXXX;
+ emit(MOV(dst_reg(MRF, param_base + 1, glsl_type::uint_type,
WRITEMASK_Y),
+ mcs));
+ }
+ inst->mlen++;
} else if (instr->op == nir_texop_txd) {
/* @TODO: not yet implemented */
} else if (instr->op == nir_texop_tg4) {
--
2.1.4
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