diff options
Diffstat (limited to 'target-arm/translate-a64.c')
| -rw-r--r-- | target-arm/translate-a64.c | 24 |
1 files changed, 23 insertions, 1 deletions
diff --git a/target-arm/translate-a64.c b/target-arm/translate-a64.c index ec77c8b301..f6a4ce752f 100644 --- a/target-arm/translate-a64.c +++ b/target-arm/translate-a64.c @@ -8450,13 +8450,30 @@ static void handle_2misc_narrow(DisasContext *s, int opcode, bool u, bool is_q, genenvfn = fns[size][u]; break; } + case 0x16: /* FCVTN, FCVTN2 */ + /* 32 bit to 16 bit or 64 bit to 32 bit float conversion */ + if (size == 2) { + gen_helper_vfp_fcvtsd(tcg_res[pass], tcg_op, cpu_env); + } else { + TCGv_i32 tcg_lo = tcg_temp_new_i32(); + TCGv_i32 tcg_hi = tcg_temp_new_i32(); + tcg_gen_trunc_i64_i32(tcg_lo, tcg_op); + gen_helper_vfp_fcvt_f32_to_f16(tcg_lo, tcg_lo, cpu_env); + tcg_gen_shri_i64(tcg_op, tcg_op, 32); + tcg_gen_trunc_i64_i32(tcg_hi, tcg_op); + gen_helper_vfp_fcvt_f32_to_f16(tcg_hi, tcg_hi, cpu_env); + tcg_gen_deposit_i32(tcg_res[pass], tcg_lo, tcg_hi, 16, 16); + tcg_temp_free_i32(tcg_lo); + tcg_temp_free_i32(tcg_hi); + } + break; default: g_assert_not_reached(); } if (genfn) { genfn(tcg_res[pass], tcg_op); - } else { + } else if (genenvfn) { genenvfn(tcg_res[pass], cpu_env, tcg_op); } @@ -8807,6 +8824,11 @@ static void disas_simd_two_reg_misc(DisasContext *s, uint32_t insn) } break; case 0x16: /* FCVTN, FCVTN2 */ + /* handle_2misc_narrow does a 2*size -> size operation, but these + * instructions encode the source size rather than dest size. + */ + handle_2misc_narrow(s, opcode, 0, is_q, size - 1, rn, rd); + return; case 0x17: /* FCVTL, FCVTL2 */ case 0x18: /* FRINTN */ case 0x19: /* FRINTM */ |