target-ppc: remove #ifdef FLOAT128

Now that PPC defaults to softfloat which always provides float128
support, there is no need to keep two version of the code, depending if
float128 support is available or not. Suggested by Peter Maydell.
Reviewed-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

target-ppc/op_helper.c

@@ -1287,7 +1287,6 @@ uint64_t helper_fmadd (uint64_t arg1, uint64_t arg2, uint64_t arg3)
             /* sNaN operation */
             fload_invalid_op_excp(POWERPC_EXCP_FP_VXSNAN);
         }
-#ifdef FLOAT128
         /* This is the way the PowerPC specification defines it */
         float128 ft0_128, ft1_128;
 
@@ -1303,10 +1302,6 @@ uint64_t helper_fmadd (uint64_t arg1, uint64_t arg2, uint64_t arg3)
             ft0_128 = float128_add(ft0_128, ft1_128, &env->fp_status);
             farg1.d = float128_to_float64(ft0_128, &env->fp_status);
         }
-#else
-        /* This is OK on x86 hosts */
-        farg1.d = (farg1.d * farg2.d) + farg3.d;
-#endif
     }
 
     return farg1.ll;
@@ -1332,7 +1327,6 @@ uint64_t helper_fmsub (uint64_t arg1, uint64_t arg2, uint64_t arg3)
             /* sNaN operation */
             fload_invalid_op_excp(POWERPC_EXCP_FP_VXSNAN);
         }
-#ifdef FLOAT128
         /* This is the way the PowerPC specification defines it */
         float128 ft0_128, ft1_128;
 
@@ -1348,10 +1342,6 @@ uint64_t helper_fmsub (uint64_t arg1, uint64_t arg2, uint64_t arg3)
             ft0_128 = float128_sub(ft0_128, ft1_128, &env->fp_status);
             farg1.d = float128_to_float64(ft0_128, &env->fp_status);
         }
-#else
-        /* This is OK on x86 hosts */
-        farg1.d = (farg1.d * farg2.d) - farg3.d;
-#endif
     }
     return farg1.ll;
 }
@@ -1376,7 +1366,6 @@ uint64_t helper_fnmadd (uint64_t arg1, uint64_t arg2, uint64_t arg3)
             /* sNaN operation */
             fload_invalid_op_excp(POWERPC_EXCP_FP_VXSNAN);
         }
-#ifdef FLOAT128
         /* This is the way the PowerPC specification defines it */
         float128 ft0_128, ft1_128;
 
@@ -1392,10 +1381,6 @@ uint64_t helper_fnmadd (uint64_t arg1, uint64_t arg2, uint64_t arg3)
             ft0_128 = float128_add(ft0_128, ft1_128, &env->fp_status);
             farg1.d = float128_to_float64(ft0_128, &env->fp_status);
         }
-#else
-        /* This is OK on x86 hosts */
-        farg1.d = (farg1.d * farg2.d) + farg3.d;
-#endif
         if (likely(!float64_is_any_nan(farg1.d))) {
             farg1.d = float64_chs(farg1.d);
         }
@@ -1423,7 +1408,6 @@ uint64_t helper_fnmsub (uint64_t arg1, uint64_t arg2, uint64_t arg3)
             /* sNaN operation */
             fload_invalid_op_excp(POWERPC_EXCP_FP_VXSNAN);
         }
-#ifdef FLOAT128
         /* This is the way the PowerPC specification defines it */
         float128 ft0_128, ft1_128;
 
@@ -1439,10 +1423,6 @@ uint64_t helper_fnmsub (uint64_t arg1, uint64_t arg2, uint64_t arg3)
             ft0_128 = float128_sub(ft0_128, ft1_128, &env->fp_status);
             farg1.d = float128_to_float64(ft0_128, &env->fp_status);
         }
-#else
-        /* This is OK on x86 hosts */
-        farg1.d = (farg1.d * farg2.d) - farg3.d;
-#endif
         if (likely(!float64_is_any_nan(farg1.d))) {
             farg1.d = float64_chs(farg1.d);
         }