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target/hppa: Fix DCOR reconstruction of carry bits

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The carry bits for each nibble N are located in bit (N+1)*4,
so the shift by 3 was off by one.  Furthermore, the carry bit
for the most significant carry bit is indeed located in bit 64,
which is located in a different storage word.

Use a double-word shift-right to reassemble into a single word
and place them all at bit 0 of their respective nibbles.

Tested-by: Helge Deller <deller@gmx.de>
Reviewed-by: Helge Deller <deller@gmx.de>
Fixes: b2167459ae ("target-hppa: Implement basic arithmetic")
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2024-03-24 14:03:05 -10:00
parent 7d50b69660
commit d0ae87a27c
1 changed files with 1 additions and 1 deletions
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target/hppa/translate.c
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@ -2791,7 +2791,7 @@ static bool do_dcor(DisasContext *ctx, arg_rr_cf_d *a, bool is_i)
nullify_over(ctx);
tmp = tcg_temp_new_i64();
tcg_gen_shri_i64(tmp, cpu_psw_cb, 3);
tcg_gen_extract2_i64(tmp, cpu_psw_cb, cpu_psw_cb_msb, 4);
if (!is_i) {
tcg_gen_not_i64(tmp, tmp);
}