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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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2
target/hexagon/macros.h
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@ -407,7 +407,7 @@ static inline TCGv gen_read_ireg(TCGv result, TCGv val, int shift)
#define fCHECK_PCALIGN(A)
#define fWRITE_NPC(A) write_new_pc(env, A)
#define fWRITE_NPC(A) write_new_pc(env, pkt_has_multi_cof != 0, A)
#define fBRANCH(LOC, TYPE) fWRITE_NPC(LOC)
#define fJUMPR(REGNO, TARGET, TYPE) fBRANCH(TARGET, COF_TYPE_JUMPR)