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target-arm: A64: Implement SHLL, SHLL2 

Implement the SHLL and SHLL2 instructions from the 2-reg-misc
category.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Message-id: 1394822294-14837-9-git-send-email-peter.maydell@linaro.org
This commit is contained in:
Peter Maydell 2014-03-17 16:31:49 +00:00
parent 6781fa119f
commit 73a81d10fd
1 changed files with 31 additions and 1 deletions
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32
target-arm/translate-a64.c
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@ -8529,6 +8529,36 @@ static void handle_2misc_pairwise(DisasContext *s, int opcode, bool u,
}
}
static void handle_shll(DisasContext *s, bool is_q, int size, int rn, int rd)
{
/* Implement SHLL and SHLL2 */
int pass;
int part = is_q ? 2 : 0;
TCGv_i64 tcg_res[2];
for (pass = 0; pass < 2; pass++) {
static NeonGenWidenFn * const widenfns[3] = {
gen_helper_neon_widen_u8,
gen_helper_neon_widen_u16,
tcg_gen_extu_i32_i64,
};
NeonGenWidenFn *widenfn = widenfns[size];
TCGv_i32 tcg_op = tcg_temp_new_i32();
read_vec_element_i32(s, tcg_op, rn, part + pass, MO_32);
tcg_res[pass] = tcg_temp_new_i64();
widenfn(tcg_res[pass], tcg_op);
tcg_gen_shli_i64(tcg_res[pass], tcg_res[pass], 8 << size);
tcg_temp_free_i32(tcg_op);
}
for (pass = 0; pass < 2; pass++) {
write_vec_element(s, tcg_res[pass], rd, pass, MO_64);
tcg_temp_free_i64(tcg_res[pass]);
}
}
/* C3.6.17 AdvSIMD two reg misc
* 31 30 29 28 24 23 22 21 17 16 12 11 10 9 5 4 0
* +---+---+---+-----------+------+-----------+--------+-----+------+------+
@ -8590,7 +8620,7 @@ static void disas_simd_two_reg_misc(DisasContext *s, uint32_t insn)
unallocated_encoding(s);
return;
}
unsupported_encoding(s, insn);
handle_shll(s, is_q, size, rn, rd);
return;
case 0xa: /* CMLT */
if (u == 1) {