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Hexagon (target/hexagon) Only use branch_taken when packet has multi cof

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When a packet has more than one change-of-flow instruction, only the first
one to branch is considered.  We use the branch_taken variable to keep
track of this.

However, when there is a single cof instruction, we don't need the same
amount of bookkeeping.

We add the pkt_has_multi_cof member to the Packet structure, and pass this
information to the needed functions.

When there is a generated helper function with cof, the generator will
pass this pkt_has_multi_cof as a runtime value.

Acked-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Message-Id: <20221108162906.3166-5-tsimpson@quicinc.com>
This commit is contained in:
Taylor Simpson 2022-11-08 08:28:59 -08:00
parent 8e8a85c14e
commit fb67c2bf24
9 changed files with 51 additions and 16 deletions
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5
target/hexagon/gen_helper_funcs.py
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@ -1,7 +1,7 @@
#!/usr/bin/env python3
##
## Copyright(c) 2019-2021 Qualcomm Innovation Center, Inc. All Rights Reserved.
## Copyright(c) 2019-2022 Qualcomm Innovation Center, Inc. All Rights Reserved.
##
## This program is free software; you can redistribute it and/or modify
## it under the terms of the GNU General Public License as published by
@ -238,6 +238,9 @@ def gen_helper_function(f, tag, tagregs, tagimms):
gen_helper_arg_imm(f,immlett)
i += 1
if (hex_common.need_pkt_has_multi_cof(tag)):
f.write(", uint32_t pkt_has_multi_cof")
if hex_common.need_slot(tag):
if i > 0: f.write(", ")
f.write("uint32_t slot")