if fj ==0 or fj == INT32_MIN/INT64_MIN, LoongArch host set fcsr cause exception FP_DIV0, So we need set exception flags float_flagdivbyzero if fj ==0.
Signed-off-by: Song Gao <gaos...@loongson.cn> --- target/loongarch/fpu_helper.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/target/loongarch/fpu_helper.c b/target/loongarch/fpu_helper.c index 1a24667eaf..8ddfbd1abd 100644 --- a/target/loongarch/fpu_helper.c +++ b/target/loongarch/fpu_helper.c @@ -322,6 +322,13 @@ uint64_t helper_flogb_s(CPULoongArchState *env, uint64_t fj) fp = float32_log2((uint32_t)fj, status); fd = nanbox_s(float32_round_to_int(fp, status)); set_float_rounding_mode(old_mode, status); + /* + * LoongArch host if fj == 0 or INT32_MIN , set the fcsr cause FP_DIV0 + * so we need set exception flags float_flag_divbyzero. + */ + if (((uint32_t)fj == 0) | ((uint32_t)fj == INT32_MIN )) { + set_float_exception_flags(float_flag_divbyzero, status); + } update_fcsr0_mask(env, GETPC(), float_flag_inexact); return fd; } @@ -336,6 +343,13 @@ uint64_t helper_flogb_d(CPULoongArchState *env, uint64_t fj) fd = float64_log2(fj, status); fd = float64_round_to_int(fd, status); set_float_rounding_mode(old_mode, status); + /* + * LoongArch host if fj == 0 or INT64_MIN , set the fcsr cause FP_DIV0 + * so we need set exception flags float_flag_divbyzero. + */ + if ( (fj == 0) | (fj == INT64_MIN)) { + set_float_exception_flags(float_flag_divbyzero, status); + } update_fcsr0_mask(env, GETPC(), float_flag_inexact); return fd; } -- 2.31.1