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target-arm: A64: Implement the wide 3-reg-different operations 

Implement the wide three-reg-different operations:
SADDW, UADDW, SSUBW and USUBW.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Peter Maydell 2014-02-20 10:35:56 +00:00
parent 70d7f984a0
commit dfc15c7ceb
1 changed files with 40 additions and 1 deletions
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41
target-arm/translate-a64.c
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@ -7117,6 +7117,41 @@ static void handle_3rd_widening(DisasContext *s, int is_q, int is_u, int size,
tcg_temp_free_i64(tcg_res[1]);
}
static void handle_3rd_wide(DisasContext *s, int is_q, int is_u, int size,
int opcode, int rd, int rn, int rm)
{
TCGv_i64 tcg_res[2];
int part = is_q ? 2 : 0;
int pass;
for (pass = 0; pass < 2; pass++) {
TCGv_i64 tcg_op1 = tcg_temp_new_i64();
TCGv_i32 tcg_op2 = tcg_temp_new_i32();
TCGv_i64 tcg_op2_wide = tcg_temp_new_i64();
static NeonGenWidenFn * const widenfns[3][2] = {
{ gen_helper_neon_widen_s8, gen_helper_neon_widen_u8 },
{ gen_helper_neon_widen_s16, gen_helper_neon_widen_u16 },
{ tcg_gen_ext_i32_i64, tcg_gen_extu_i32_i64 },
};
NeonGenWidenFn *widenfn = widenfns[size][is_u];
read_vec_element(s, tcg_op1, rn, pass, MO_64);
read_vec_element_i32(s, tcg_op2, rm, part + pass, MO_32);
widenfn(tcg_op2_wide, tcg_op2);
tcg_temp_free_i32(tcg_op2);
tcg_res[pass] = tcg_temp_new_i64();
gen_neon_addl(size, (opcode == 3),
tcg_res[pass], tcg_op1, tcg_op2_wide);
tcg_temp_free_i64(tcg_op1);
tcg_temp_free_i64(tcg_op2_wide);
}
for (pass = 0; pass < 2; pass++) {
write_vec_element(s, tcg_res[pass], rd, pass, MO_64);
tcg_temp_free_i64(tcg_res[pass]);
}
}
/* C3.6.15 AdvSIMD three different
* 31 30 29 28 24 23 22 21 20 16 15 12 11 10 9 5 4 0
* +---+---+---+-----------+------+---+------+--------+-----+------+------+
@ -7147,7 +7182,11 @@ static void disas_simd_three_reg_diff(DisasContext *s, uint32_t insn)
case 1: /* SADDW, SADDW2, UADDW, UADDW2 */
case 3: /* SSUBW, SSUBW2, USUBW, USUBW2 */
/* 64 x 128 -> 128 */
unsupported_encoding(s, insn);
if (size == 3) {
unallocated_encoding(s);
return;
}
handle_3rd_wide(s, is_q, is_u, size, opcode, rd, rn, rm);
break;
case 4: /* ADDHN, ADDHN2, RADDHN, RADDHN2 */
case 6: /* SUBHN, SUBHN2, RSUBHN, RSUBHN2 */