PowerPC bugfixes:

- must clear carry bit when doing addic with a zero immediate value
- fix missing RETURN in micro-operation that would lead to random failures
  and crashes
- add USE_PRECISE_EMULATION compilation-time option to choose between
  getting exact floating point results and fast but less accurate computation.


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2526 c046a42c-6fe2-441c-8c8c-71466251a162

1 files changed, 19 insertions, 1 deletions

diff --git a/target-ppc/op.c b/target-ppc/op.c
index f13f6f5676..068ccb53b2 100644
--- a/target-ppc/op.c
+++ b/target-ppc/op.c
@@ -261,10 +261,15 @@ PPC_OP(load_xer_cr)
     RETURN();
 }
 
-PPC_OP(clear_xer_cr)
+PPC_OP(clear_xer_ov)
 {
     xer_so = 0;
     xer_ov = 0;
+    RETURN();
+}
+
+PPC_OP(clear_xer_ca)
+{
     xer_ca = 0;
     RETURN();
 }
@@ -714,6 +719,7 @@ void OPPROTO op_check_addo (void)
         xer_so = 1;
         xer_ov = 1;
     }
+    RETURN();
 }
 
 #if defined(TARGET_PPC64)
@@ -726,6 +732,7 @@ void OPPROTO op_check_addo_64 (void)
         xer_so = 1;
         xer_ov = 1;
     }
+    RETURN();
 }
 #endif
 
@@ -1643,16 +1650,24 @@ PPC_OP(fsel)
 /* fmadd - fmadd. */
 PPC_OP(fmadd)
 {
+#if USE_PRECISE_EMULATION
+    do_fmadd();
+#else
     FT0 = float64_mul(FT0, FT1, &env->fp_status);
     FT0 = float64_add(FT0, FT2, &env->fp_status);
+#endif
     RETURN();
 }
 
 /* fmsub - fmsub. */
 PPC_OP(fmsub)
 {
+#if USE_PRECISE_EMULATION
+    do_fmsub();
+#else
     FT0 = float64_mul(FT0, FT1, &env->fp_status);
     FT0 = float64_sub(FT0, FT2, &env->fp_status);
+#endif
     RETURN();
 }
 
@@ -2378,6 +2393,7 @@ void OPPROTO op_store_booke_tsr (void)
 void OPPROTO op_splatw_T1_64 (void)
 {
     T1_64 = (T1_64 << 32) | (T1_64 & 0x00000000FFFFFFFFULL);
+    RETURN();
 }
 
 void OPPROTO op_splatwi_T0_64 (void)
@@ -2385,6 +2401,7 @@ void OPPROTO op_splatwi_T0_64 (void)
     uint64_t tmp = PARAM1;
 
     T0_64 = (tmp << 32) | tmp;
+    RETURN();
 }
 
 void OPPROTO op_splatwi_T1_64 (void)
@@ -2392,6 +2409,7 @@ void OPPROTO op_splatwi_T1_64 (void)
     uint64_t tmp = PARAM1;
 
     T1_64 = (tmp << 32) | tmp;
+    RETURN();
 }
 
 void OPPROTO op_extsh_T1_64 (void)