This patch adds emulation for the "Floating-point data-processing (1 source)" group of instructions in their 32 bit flavors.
Signed-off-by: Alexander Graf <[email protected]> --- target-arm/helper-a64.c | 5 +++ target-arm/helper-a64.h | 1 + target-arm/translate-a64.c | 79 ++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 85 insertions(+) diff --git a/target-arm/helper-a64.c b/target-arm/helper-a64.c index 0b7aee1..b430823 100644 --- a/target-arm/helper-a64.c +++ b/target-arm/helper-a64.c @@ -297,3 +297,8 @@ void HELPER(set_rmode)(uint32_t rmode, void *fp_status) set_float_rounding_mode(rmode, fp_status); } + +float32 HELPER(rints)(float32 x, void *fp_status) +{ + return float32_round_to_int(x, fp_status); +} diff --git a/target-arm/helper-a64.h b/target-arm/helper-a64.h index f42edf8..4dbc56a 100644 --- a/target-arm/helper-a64.h +++ b/target-arm/helper-a64.h @@ -31,3 +31,4 @@ DEF_HELPER_FLAGS_1(clz64, TCG_CALL_NO_RWG_SE, i64, i64) DEF_HELPER_FLAGS_2(umulh, TCG_CALL_NO_RWG_SE, i64, i64, i64) DEF_HELPER_FLAGS_2(smulh, TCG_CALL_NO_RWG_SE, i64, i64, i64) DEF_HELPER_2(set_rmode, void, i32, ptr) +DEF_HELPER_FLAGS_2(rints, TCG_CALL_NO_RWG_SE, f32, f32, ptr) diff --git a/target-arm/translate-a64.c b/target-arm/translate-a64.c index 948e5c4..52ecef4 100644 --- a/target-arm/translate-a64.c +++ b/target-arm/translate-a64.c @@ -2038,6 +2038,82 @@ static void handle_fcmp(DisasContext *s, uint32_t insn) tcg_temp_free_i32(tcg_op2_32); } +/* Floating-point data-processing (1 source) - 32 bit */ +static void handle_fpdp1s32(DisasContext *s, uint32_t insn) +{ + int rd = get_bits(insn, 0, 5); + int rn = get_bits(insn, 5, 5); + int opcode = get_bits(insn, 15, 6); + int freg_offs_n = offsetof(CPUARMState, vfp.regs[rn * 2]); + int freg_offs_d = offsetof(CPUARMState, vfp.regs[rd * 2]); + TCGv_i64 tcg_tmp = tcg_temp_new_i64(); + TCGv_i32 tcg_op = tcg_temp_new_i32(); + TCGv_i32 tcg_res = tcg_temp_new_i32(); + TCGv_ptr fpst = get_fpstatus_ptr(); + bool skip_write = false; + + tcg_gen_ld_i64(tcg_tmp, cpu_env, freg_offs_n); + tcg_gen_trunc_i64_i32(tcg_op, tcg_tmp); + + switch (opcode) { + case 0x0: /* FMOV */ + tcg_gen_mov_i32(tcg_res, tcg_op); + break; + case 0x1: /* FABS */ + gen_helper_vfp_abss(tcg_res, tcg_op); + break; + case 0x2: /* FNEG */ + gen_helper_vfp_negs(tcg_res, tcg_op); + break; + case 0x3: /* FSQRT */ + gen_helper_vfp_sqrts(tcg_res, tcg_op, cpu_env); + break; + case 0x5: /* FCVT (single to double) */ + skip_write = true; + gen_helper_vfp_fcvtds(tcg_tmp, tcg_op, cpu_env); + clear_fpreg(rd); + tcg_gen_st_i64(tcg_tmp, cpu_env, freg_offs_d); + break; + case 0x7: /* FCVT (single to half) */ + /* XXX */ + unallocated_encoding(s); + return; + case 0x8: /* FRINTN XXX add rounding mode */ + case 0x9: /* FRINTP */ + case 0xa: /* FRINTM */ + case 0xb: /* FRINTZ */ + case 0xc: /* FRINTA */ + case 0xe: /* FRINTX */ + case 0xf: /* FRINTI */ + { + TCGv_i32 tcg_rmode = tcg_const_i32(opcode & 7); + + gen_helper_set_rmode(tcg_rmode, fpst); + gen_helper_rints(tcg_res, tcg_op, fpst); + + /* XXX use fpcr */ + tcg_gen_movi_i32(tcg_rmode, -1); + gen_helper_set_rmode(tcg_rmode, fpst); + tcg_temp_free_i32(tcg_rmode); + break; + } + default: + unallocated_encoding(s); + return; + } + + if (!skip_write) { + clear_fpreg(rd); + tcg_gen_ext32u_i64(tcg_tmp, tcg_res); + tcg_gen_st32_i64(tcg_tmp, cpu_env, freg_offs_d); + } + + tcg_temp_free_ptr(fpst); + tcg_temp_free_i32(tcg_op); + tcg_temp_free_i32(tcg_res); + tcg_temp_free_i64(tcg_tmp); +} + /* SIMD ORR */ static void handle_simdorr(DisasContext *s, uint32_t insn) { @@ -2629,6 +2705,9 @@ void disas_a64_insn(CPUARMState *env, DisasContext *s) } else if (!get_bits(insn, 29, 3) && get_bits(insn, 21, 1) && (get_bits(insn, 10, 6) == 0x8) && !get_bits(insn, 0, 3)) { handle_fcmp(s, insn); + } else if (!get_bits(insn, 29, 3) && !get_bits(insn, 22, 2) && + get_bits(insn, 21, 1) && (get_bits(insn, 10, 5) == 0x10)) { + handle_fpdp1s32(s, insn); } else { unallocated_encoding(s); } -- 1.7.12.4
