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target/sparc: Use tcg_gen_movcond_i64 in gen_edge 

The setcond + neg + or sequence is a complex method of
performing a conditional move.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
master
Richard Henderson 2023-08-05 00:31:29 +00:00
parent 253d110dba
commit e3ebbade58
1 changed files with 4 additions and 13 deletions
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17
target/sparc/translate.c
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@ -2916,7 +2916,7 @@ static void gen_edge(DisasContext *dc, TCGv dst, TCGv s1, TCGv s2,
tcg_gen_shr_tl(lo1, tcg_constant_tl(tabl), lo1);
tcg_gen_shr_tl(lo2, tcg_constant_tl(tabr), lo2);
tcg_gen_andi_tl(dst, lo1, omask);
tcg_gen_andi_tl(lo1, lo1, omask);
tcg_gen_andi_tl(lo2, lo2, omask);
amask = -8;
@ -2926,18 +2926,9 @@ static void gen_edge(DisasContext *dc, TCGv dst, TCGv s1, TCGv s2,
tcg_gen_andi_tl(s1, s1, amask);
tcg_gen_andi_tl(s2, s2, amask);
/* We want to compute
dst = (s1 == s2 ? lo1 : lo1 & lo2).
We've already done dst = lo1, so this reduces to
dst &= (s1 == s2 ? -1 : lo2)
Which we perform by
lo2 |= -(s1 == s2)
dst &= lo2
*/
tcg_gen_setcond_tl(TCG_COND_EQ, lo1, s1, s2);
tcg_gen_neg_tl(lo1, lo1);
tcg_gen_or_tl(lo2, lo2, lo1);
tcg_gen_and_tl(dst, dst, lo2);
/* Compute dst = (s1 == s2 ? lo1 : lo1 & lo2). */
tcg_gen_and_tl(lo2, lo2, lo1);
tcg_gen_movcond_tl(TCG_COND_EQ, dst, s1, s2, lo1, lo2);
}
static void gen_alignaddr(TCGv dst, TCGv s1, TCGv s2, bool left)