diff options
Diffstat (limited to 'target-arm/translate-a64.c')
| -rw-r--r-- | target-arm/translate-a64.c | 70 |
1 files changed, 69 insertions, 1 deletions
diff --git a/target-arm/translate-a64.c b/target-arm/translate-a64.c index 8bf66a6def..5f560eb675 100644 --- a/target-arm/translate-a64.c +++ b/target-arm/translate-a64.c @@ -6886,6 +6886,72 @@ static void handle_2misc_fcmp_zero(DisasContext *s, int opcode, tcg_temp_free_ptr(fpst); } +static void handle_2misc_reciprocal(DisasContext *s, int opcode, + bool is_scalar, bool is_u, bool is_q, + int size, int rn, int rd) +{ + bool is_double = (size == 3); + TCGv_ptr fpst = get_fpstatus_ptr(); + + if (is_double) { + TCGv_i64 tcg_op = tcg_temp_new_i64(); + TCGv_i64 tcg_res = tcg_temp_new_i64(); + int pass; + + for (pass = 0; pass < (is_scalar ? 1 : 2); pass++) { + read_vec_element(s, tcg_op, rn, pass, MO_64); + switch (opcode) { + case 0x3f: /* FRECPX */ + gen_helper_frecpx_f64(tcg_res, tcg_op, fpst); + break; + default: + g_assert_not_reached(); + } + write_vec_element(s, tcg_res, rd, pass, MO_64); + } + if (is_scalar) { + clear_vec_high(s, rd); + } + + tcg_temp_free_i64(tcg_res); + tcg_temp_free_i64(tcg_op); + } else { + TCGv_i32 tcg_op = tcg_temp_new_i32(); + TCGv_i32 tcg_res = tcg_temp_new_i32(); + int pass, maxpasses; + + if (is_scalar) { + maxpasses = 1; + } else { + maxpasses = is_q ? 4 : 2; + } + + for (pass = 0; pass < maxpasses; pass++) { + read_vec_element_i32(s, tcg_op, rn, pass, MO_32); + + switch (opcode) { + case 0x3f: /* FRECPX */ + gen_helper_frecpx_f32(tcg_res, tcg_op, fpst); + break; + default: + g_assert_not_reached(); + } + + if (is_scalar) { + write_fp_sreg(s, rd, tcg_res); + } else { + write_vec_element_i32(s, tcg_res, rd, pass, MO_32); + } + } + tcg_temp_free_i32(tcg_res); + tcg_temp_free_i32(tcg_op); + if (!is_q && !is_scalar) { + clear_vec_high(s, rd); + } + } + tcg_temp_free_ptr(fpst); +} + /* C3.6.12 AdvSIMD scalar two reg misc * 31 30 29 28 24 23 22 21 17 16 12 11 10 9 5 4 0 * +-----+---+-----------+------+-----------+--------+-----+------+------+ @@ -6942,6 +7008,9 @@ static void disas_simd_scalar_two_reg_misc(DisasContext *s, uint32_t insn) handle_simd_intfp_conv(s, rd, rn, 1, is_signed, 0, size); return; } + case 0x3f: /* FRECPX */ + handle_2misc_reciprocal(s, opcode, true, u, true, size, rn, rd); + return; case 0x1a: /* FCVTNS */ case 0x1b: /* FCVTMS */ case 0x3a: /* FCVTPS */ @@ -6960,7 +7029,6 @@ static void disas_simd_scalar_two_reg_misc(DisasContext *s, uint32_t insn) rmode = FPROUNDING_TIEAWAY; break; case 0x3d: /* FRECPE */ - case 0x3f: /* FRECPX */ case 0x56: /* FCVTXN, FCVTXN2 */ case 0x7d: /* FRSQRTE */ unsupported_encoding(s, insn); |