diff options
Diffstat (limited to 'target/riscv/fpu_helper.c')
| -rw-r--r-- | target/riscv/fpu_helper.c | 36 |
1 files changed, 34 insertions, 2 deletions
diff --git a/target/riscv/fpu_helper.c b/target/riscv/fpu_helper.c index 5699c9517f..449d236df6 100644 --- a/target/riscv/fpu_helper.c +++ b/target/riscv/fpu_helper.c @@ -81,9 +81,41 @@ void helper_set_rounding_mode(CPURISCVState *env, uint32_t rm) set_float_rounding_mode(softrm, &env->fp_status); } -void helper_set_rod_rounding_mode(CPURISCVState *env) +void helper_set_rounding_mode_chkfrm(CPURISCVState *env, uint32_t rm) { - set_float_rounding_mode(float_round_to_odd, &env->fp_status); + int softrm; + + /* Always validate frm, even if rm != DYN. */ + if (unlikely(env->frm >= 5)) { + riscv_raise_exception(env, RISCV_EXCP_ILLEGAL_INST, GETPC()); + } + if (rm == RISCV_FRM_DYN) { + rm = env->frm; + } + switch (rm) { + case RISCV_FRM_RNE: + softrm = float_round_nearest_even; + break; + case RISCV_FRM_RTZ: + softrm = float_round_to_zero; + break; + case RISCV_FRM_RDN: + softrm = float_round_down; + break; + case RISCV_FRM_RUP: + softrm = float_round_up; + break; + case RISCV_FRM_RMM: + softrm = float_round_ties_away; + break; + case RISCV_FRM_ROD: + softrm = float_round_to_odd; + break; + default: + g_assert_not_reached(); + } + + set_float_rounding_mode(softrm, &env->fp_status); } static uint64_t do_fmadd_h(CPURISCVState *env, uint64_t rs1, uint64_t rs2, |