target/ppc: Make madd instructions work with hardfpu

Signed-off-by: Víctor Colombo <[email protected]>

Author: vcoracolombo

target/ppc/fpu_helper.c

@@ -2219,6 +2219,11 @@ void helper_##op(CPUPPCState *env, ppc_vsr_t *xt,                             \
     for (i = 0; i < nels; i++) {                                              \
         float_status tstat = env->fp_status;                                  \
         set_float_exception_flags(0, &tstat);                                 \
+        /* if function doesn't change FI, and XX is already set */            \
+        if (!(sfifprf) && (env->fpscr & FP_XX)) {                             \
+            /* set float_flag_inexact to allow hardfpu use */                 \
+            tstat.float_exception_flags |= float_flag_inexact;                \
+        }                                                                     \
         t.fld = tp##_muladd(s1->fld, s3->fld, s2->fld, maddflgs, &tstat);     \
         env->fp_status.float_exception_flags |= tstat.float_exception_flags;  \
                                                                               \