uint64_t helper_frsqrte(CPUPPCState *env, uint64_t arg) { CPU_DoubleU farg; farg.ll = arg; if (unlikely(float64_is_neg(farg.d) && !float64_is_zero(farg.d))) { /* Reciprocal square root of a negative nonzero number */ farg.ll = fload_invalid_op_excp(env, POWERPC_EXCP_FP_VXSQRT, 1); } else { if (unlikely(float64_is_signaling_nan(farg.d))) { /* sNaN reciprocal square root */ fload_invalid_op_excp(env, POWERPC_EXCP_FP_VXSNAN, 1); } farg.d = float64_sqrt(farg.d, &env->fp_status); farg.d = float64_div(float64_one, farg.d, &env->fp_status); } return farg.ll; }