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target-arm: A64: Implement scalar three different instructions 

Implement the scalar three different instruction group:
it only has three instructions in it.

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 10:35:49 +00:00
parent 9f82e0ff4b
commit b033cd3d00
1 changed files with 94 additions and 1 deletions
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95
target-arm/translate-a64.c
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@ -5838,7 +5838,100 @@ static void disas_simd_scalar_shift_imm(DisasContext *s, uint32_t insn)
*/ */
static void disas_simd_scalar_three_reg_diff(DisasContext *s, uint32_t insn) static void disas_simd_scalar_three_reg_diff(DisasContext *s, uint32_t insn)
{ {
unsupported_encoding(s, insn); bool is_u = extract32(insn, 29, 1);
int size = extract32(insn, 22, 2);
int opcode = extract32(insn, 12, 4);
int rm = extract32(insn, 16, 5);
int rn = extract32(insn, 5, 5);
int rd = extract32(insn, 0, 5);
if (is_u) {
unallocated_encoding(s);
return;
}
switch (opcode) {
case 0x9: /* SQDMLAL, SQDMLAL2 */
case 0xb: /* SQDMLSL, SQDMLSL2 */
case 0xd: /* SQDMULL, SQDMULL2 */
if (size == 0 || size == 3) {
unallocated_encoding(s);
return;
}
break;
default:
unallocated_encoding(s);
return;
}
if (size == 2) {
TCGv_i64 tcg_op1 = tcg_temp_new_i64();
TCGv_i64 tcg_op2 = tcg_temp_new_i64();
TCGv_i64 tcg_res = tcg_temp_new_i64();
read_vec_element(s, tcg_op1, rn, 0, MO_32 | MO_SIGN);
read_vec_element(s, tcg_op2, rm, 0, MO_32 | MO_SIGN);
tcg_gen_mul_i64(tcg_res, tcg_op1, tcg_op2);
gen_helper_neon_addl_saturate_s64(tcg_res, cpu_env, tcg_res, tcg_res);
switch (opcode) {
case 0xd: /* SQDMULL, SQDMULL2 */
break;
case 0xb: /* SQDMLSL, SQDMLSL2 */
tcg_gen_neg_i64(tcg_res, tcg_res);
/* fall through */
case 0x9: /* SQDMLAL, SQDMLAL2 */
read_vec_element(s, tcg_op1, rd, 0, MO_64);
gen_helper_neon_addl_saturate_s64(tcg_res, cpu_env,
tcg_res, tcg_op1);
break;
default:
g_assert_not_reached();
}
write_fp_dreg(s, rd, tcg_res);
tcg_temp_free_i64(tcg_op1);
tcg_temp_free_i64(tcg_op2);
tcg_temp_free_i64(tcg_res);
} else {
TCGv_i32 tcg_op1 = tcg_temp_new_i32();
TCGv_i32 tcg_op2 = tcg_temp_new_i32();
TCGv_i64 tcg_res = tcg_temp_new_i64();
read_vec_element_i32(s, tcg_op1, rn, 0, MO_16);
read_vec_element_i32(s, tcg_op2, rm, 0, MO_16);
gen_helper_neon_mull_s16(tcg_res, tcg_op1, tcg_op2);
gen_helper_neon_addl_saturate_s32(tcg_res, cpu_env, tcg_res, tcg_res);
switch (opcode) {
case 0xd: /* SQDMULL, SQDMULL2 */
break;
case 0xb: /* SQDMLSL, SQDMLSL2 */
gen_helper_neon_negl_u32(tcg_res, tcg_res);
/* fall through */
case 0x9: /* SQDMLAL, SQDMLAL2 */
{
TCGv_i64 tcg_op3 = tcg_temp_new_i64();
read_vec_element(s, tcg_op3, rd, 0, MO_32);
gen_helper_neon_addl_saturate_s32(tcg_res, cpu_env,
tcg_res, tcg_op3);
tcg_temp_free_i64(tcg_op3);
break;
}
default:
g_assert_not_reached();
}
tcg_gen_ext32u_i64(tcg_res, tcg_res);
write_fp_dreg(s, rd, tcg_res);
tcg_temp_free_i32(tcg_op1);
tcg_temp_free_i32(tcg_op2);
tcg_temp_free_i64(tcg_res);
}
} }
static void handle_3same_64(DisasContext *s, int opcode, bool u, static void handle_3same_64(DisasContext *s, int opcode, bool u,