Implement at brw_eu_validate the restriction from Intel Broadwell PRM,
vol 07, section "Instruction Set Reference", subsection "EUISA
Instructions", Send Message (page 990):
"r127 must not be used for return address when there is a src and
dest overlap in send instruction."
v2: Style fixes (Matt Turner)
Reviewed-by: Matt Turner <matts...@gmail.com>
---
src/intel/compiler/brw_eu_validate.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/src/intel/compiler/brw_eu_validate.c
b/src/intel/compiler/brw_eu_validate.c
index d3189d1ef5e..29d1fe46f71 100644
--- a/src/intel/compiler/brw_eu_validate.c
+++ b/src/intel/compiler/brw_eu_validate.c
@@ -261,6 +261,17 @@ send_restrictions(const struct gen_device_info *devinfo,
brw_inst_src0_da_reg_nr(devinfo, inst) < 112,
"send with EOT must use g112-g127");
}
+
+ if (devinfo->gen >= 8) {
+ ERROR_IF(!dst_is_null(devinfo, inst) &&
+ (brw_inst_dst_da_reg_nr(devinfo, inst) +
+ brw_inst_rlen(devinfo, inst) > 127) &&
+ (brw_inst_src0_da_reg_nr(devinfo, inst) +
+ brw_inst_mlen(devinfo, inst) >
+ brw_inst_dst_da_reg_nr(devinfo, inst)),
+ "r127 must not be used for return address when there is "
+ "a src and dest overlap");
+ }
}
return error_msg;
--
2.17.1
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