This provides a reasonable place to enforce the hardware restriction
that indirect descriptors must be in a0.0
Signed-off-by: Chris Forbes <chr...@ijw.co.nz>
---
src/mesa/drivers/dri/i965/brw_eu.h | 5 +++++
src/mesa/drivers/dri/i965/brw_eu_emit.c | 15 +++++++++++++++
2 files changed, 20 insertions(+)
diff --git a/src/mesa/drivers/dri/i965/brw_eu.h
b/src/mesa/drivers/dri/i965/brw_eu.h
index 63cb20b..3858627 100644
--- a/src/mesa/drivers/dri/i965/brw_eu.h
+++ b/src/mesa/drivers/dri/i965/brw_eu.h
@@ -205,6 +205,11 @@ void brw_set_sampler_message(struct brw_compile *p,
unsigned simd_mode,
unsigned return_format);
+void brw_set_indirect_send_descriptor(struct brw_compile *p,
+ brw_inst *insn,
+ unsigned sfid,
+ struct brw_reg descriptor);
+
void brw_set_dp_read_message(struct brw_compile *p,
brw_inst *insn,
unsigned binding_table_index,
diff --git a/src/mesa/drivers/dri/i965/brw_eu_emit.c
b/src/mesa/drivers/dri/i965/brw_eu_emit.c
index 12424bd..bc74de3 100644
--- a/src/mesa/drivers/dri/i965/brw_eu_emit.c
+++ b/src/mesa/drivers/dri/i965/brw_eu_emit.c
@@ -760,6 +760,21 @@ brw_set_sampler_message(struct brw_compile *p,
}
}
+void brw_set_indirect_send_descriptor(struct brw_compile *p,
+ brw_inst *insn,
+ unsigned sfid,
+ struct brw_reg descriptor)
+{
+ /* Only a0.0 may be used as SEND's descriptor operand. */
+ assert(descriptor.file == BRW_ARCHITECTURE_REGISTER_FILE);
+ assert(descriptor.type == BRW_REGISTER_TYPE_UD);
+ assert(descriptor.nr == BRW_ARF_ADDRESS);
+ assert(descriptor.subnr == 0);
+
+ brw_set_message_descriptor(p, insn, sfid, 0, 0, false, false);
+ brw_set_src1(p, insn, descriptor);
+}
+
static void
gen7_set_dp_scratch_message(struct brw_compile *p,
brw_inst *inst,
--
2.0.2
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