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-rw-r--r--src/mesa/drivers/dri/i965/brw_fs.cpp8
1 files changed, 8 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_fs.cpp b/src/mesa/drivers/dri/i965/brw_fs.cpp
index 00d937e30a7..bd026de0c57 100644
--- a/src/mesa/drivers/dri/i965/brw_fs.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs.cpp
@@ -4448,6 +4448,14 @@ lower_varying_pull_constant_logical_send(const fs_builder &bld, fs_inst *inst)
const brw_device_info *devinfo = bld.shader->devinfo;
if (devinfo->gen >= 7) {
+ /* We are switching the instruction from an ALU-like instruction to a
+ * send-from-grf instruction. Since sends can't handle strides or
+ * source modifiers, we have to make a copy of the offset source.
+ */
+ fs_reg tmp = bld.vgrf(BRW_REGISTER_TYPE_UD);
+ bld.MOV(tmp, inst->src[1]);
+ inst->src[1] = tmp;
+
inst->opcode = FS_OPCODE_VARYING_PULL_CONSTANT_LOAD_GEN7;
} else {