gwj / at91sam9263 · Commits

Commit 34ba2857a067e142301e73cc04a294fd64fc1bc2

Authored by aurel32
1 parent 54c5a2ae

Add various NaN-handling macros 

These simplify the implementation of the floating-point Altivec
instructions and reduce clutter.

Signed-off-by: Nathan Froyd <froydnj@codesourcery.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6511 c046a42c-6fe2-441c-8c8c-71466251a162
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Showing 1 changed file with 21 additions and 0 deletions
target-ppc/op_helper.c
  View file @34ba285
... ... @@ -1965,6 +1965,23 @@ target_ulong helper_dlmzb (target_ulong high, target_ulong low, uint32_t update_
1965 1965 for (index = ARRAY_SIZE(r->element)-1; index >= 0; index--)
1966 1966 #endif
1967 1967  
  1968 +/* If X is a NaN, store the corresponding QNaN into RESULT. Otherwise,
  1969 + * execute the following block. */
  1970 +#define DO_HANDLE_NAN(result, x) \
  1971 + if (float32_is_nan(x) || float32_is_signaling_nan(x)) { \
  1972 + CPU_FloatU __f; \
  1973 + __f.f = x; \
  1974 + __f.l = __f.l | (1 << 22); /* Set QNaN bit. */ \
  1975 + result = __f.f; \
  1976 + } else
  1977 +
  1978 +#define HANDLE_NAN1(result, x) \
  1979 + DO_HANDLE_NAN(result, x)
  1980 +#define HANDLE_NAN2(result, x, y) \
  1981 + DO_HANDLE_NAN(result, x) DO_HANDLE_NAN(result, y)
  1982 +#define HANDLE_NAN3(result, x, y, z) \
  1983 + DO_HANDLE_NAN(result, x) DO_HANDLE_NAN(result, y) DO_HANDLE_NAN(result, z)
  1984 +
1968 1985 /* Saturating arithmetic helpers. */
1969 1986 #define SATCVT(from, to, from_type, to_type, min, max, use_min, use_max) \
1970 1987 static always_inline to_type cvt##from##to (from_type x, int *sat) \
... ... @@ -2818,6 +2835,10 @@ VUPK(lsh, s32, s16, UPKLO)
2818 2835 #undef UPKHI
2819 2836 #undef UPKLO
2820 2837  
  2838 +#undef DO_HANDLE_NAN
  2839 +#undef HANDLE_NAN1
  2840 +#undef HANDLE_NAN2
  2841 +#undef HANDLE_NAN3
2821 2842 #undef VECTOR_FOR_INORDER_I
2822 2843 #undef HI_IDX
2823 2844 #undef LO_IDX
... ...