diff options
Diffstat (limited to 'target-arm/translate-a64.c')
| -rw-r--r-- | target-arm/translate-a64.c | 80 |
1 files changed, 78 insertions, 2 deletions
diff --git a/target-arm/translate-a64.c b/target-arm/translate-a64.c index 61b234a2a4..0330ce9070 100644 --- a/target-arm/translate-a64.c +++ b/target-arm/translate-a64.c @@ -6224,6 +6224,82 @@ static void handle_simd_shift_intfp_conv(DisasContext *s, bool is_scalar, handle_simd_intfp_conv(s, rd, rn, elements, !is_u, fracbits, size); } +/* FCVTZS, FVCVTZU - FP to fixedpoint conversion */ +static void handle_simd_shift_fpint_conv(DisasContext *s, bool is_scalar, + bool is_q, bool is_u, + int immh, int immb, int rn, int rd) +{ + bool is_double = extract32(immh, 3, 1); + int immhb = immh << 3 | immb; + int fracbits = (is_double ? 128 : 64) - immhb; + int pass; + TCGv_ptr tcg_fpstatus; + TCGv_i32 tcg_rmode, tcg_shift; + + if (!extract32(immh, 2, 2)) { + unallocated_encoding(s); + return; + } + + if (!is_scalar && !is_q && is_double) { + unallocated_encoding(s); + return; + } + + assert(!(is_scalar && is_q)); + + tcg_rmode = tcg_const_i32(arm_rmode_to_sf(FPROUNDING_ZERO)); + gen_helper_set_rmode(tcg_rmode, tcg_rmode, cpu_env); + tcg_fpstatus = get_fpstatus_ptr(); + tcg_shift = tcg_const_i32(fracbits); + + if (is_double) { + int maxpass = is_scalar ? 1 : is_q ? 2 : 1; + + for (pass = 0; pass < maxpass; pass++) { + TCGv_i64 tcg_op = tcg_temp_new_i64(); + + read_vec_element(s, tcg_op, rn, pass, MO_64); + if (is_u) { + gen_helper_vfp_touqd(tcg_op, tcg_op, tcg_shift, tcg_fpstatus); + } else { + gen_helper_vfp_tosqd(tcg_op, tcg_op, tcg_shift, tcg_fpstatus); + } + write_vec_element(s, tcg_op, rd, pass, MO_64); + tcg_temp_free_i64(tcg_op); + } + if (!is_q) { + clear_vec_high(s, rd); + } + } else { + int maxpass = is_scalar ? 1 : is_q ? 4 : 2; + for (pass = 0; pass < maxpass; pass++) { + TCGv_i32 tcg_op = tcg_temp_new_i32(); + + read_vec_element_i32(s, tcg_op, rn, pass, MO_32); + if (is_u) { + gen_helper_vfp_touls(tcg_op, tcg_op, tcg_shift, tcg_fpstatus); + } else { + gen_helper_vfp_tosls(tcg_op, tcg_op, tcg_shift, tcg_fpstatus); + } + if (is_scalar) { + write_fp_sreg(s, rd, tcg_op); + } else { + write_vec_element_i32(s, tcg_op, rd, pass, MO_32); + } + tcg_temp_free_i32(tcg_op); + } + if (!is_q && !is_scalar) { + clear_vec_high(s, rd); + } + } + + tcg_temp_free_ptr(tcg_fpstatus); + tcg_temp_free_i32(tcg_shift); + gen_helper_set_rmode(tcg_rmode, tcg_rmode, cpu_env); + tcg_temp_free_i32(tcg_rmode); +} + /* C3.6.9 AdvSIMD scalar shift by immediate * 31 30 29 28 23 22 19 18 16 15 11 10 9 5 4 0 * +-----+---+-------------+------+------+--------+---+------+------+ @@ -6291,7 +6367,7 @@ static void disas_simd_scalar_shift_imm(DisasContext *s, uint32_t insn) handle_simd_qshl(s, true, false, is_u, is_u, immh, immb, rn, rd); break; case 0x1f: /* FCVTZS, FCVTZU */ - unsupported_encoding(s, insn); + handle_simd_shift_fpint_conv(s, true, false, is_u, immh, immb, rn, rd); break; default: unallocated_encoding(s); @@ -7543,7 +7619,7 @@ static void disas_simd_shift_imm(DisasContext *s, uint32_t insn) handle_simd_qshl(s, false, is_q, is_u, is_u, immh, immb, rn, rd); break; case 0x1f: /* FCVTZS/ FCVTZU */ - unsupported_encoding(s, insn); + handle_simd_shift_fpint_conv(s, false, is_q, is_u, immh, immb, rn, rd); return; default: unallocated_encoding(s); |