diff options
| author | aurel32 <aurel32@c046a42c-6fe2-441c-8c8c-71466251a162> | 2009-02-04 09:05:53 +0000 |
|---|---|---|
| committer | aurel32 <aurel32@c046a42c-6fe2-441c-8c8c-71466251a162> | 2009-02-04 09:05:53 +0000 |
| commit | 34ba2857a067e142301e73cc04a294fd64fc1bc2 (patch) | |
| tree | 7b2bc153f8f82d4f9174eae6720aafe01c0c14e1 | |
| parent | 54c5a2ae54aa02a3e7a1f708c20b6bffe81b330b (diff) | |
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
| -rw-r--r-- | target-ppc/op_helper.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/target-ppc/op_helper.c b/target-ppc/op_helper.c index efeac83291..107f977b0d 100644 --- a/target-ppc/op_helper.c +++ b/target-ppc/op_helper.c @@ -1965,6 +1965,23 @@ target_ulong helper_dlmzb (target_ulong high, target_ulong low, uint32_t update_ for (index = ARRAY_SIZE(r->element)-1; index >= 0; index--) #endif +/* If X is a NaN, store the corresponding QNaN into RESULT. Otherwise, + * execute the following block. */ +#define DO_HANDLE_NAN(result, x) \ + if (float32_is_nan(x) || float32_is_signaling_nan(x)) { \ + CPU_FloatU __f; \ + __f.f = x; \ + __f.l = __f.l | (1 << 22); /* Set QNaN bit. */ \ + result = __f.f; \ + } else + +#define HANDLE_NAN1(result, x) \ + DO_HANDLE_NAN(result, x) +#define HANDLE_NAN2(result, x, y) \ + DO_HANDLE_NAN(result, x) DO_HANDLE_NAN(result, y) +#define HANDLE_NAN3(result, x, y, z) \ + DO_HANDLE_NAN(result, x) DO_HANDLE_NAN(result, y) DO_HANDLE_NAN(result, z) + /* Saturating arithmetic helpers. */ #define SATCVT(from, to, from_type, to_type, min, max, use_min, use_max) \ static always_inline to_type cvt##from##to (from_type x, int *sat) \ @@ -2818,6 +2835,10 @@ VUPK(lsh, s32, s16, UPKLO) #undef UPKHI #undef UPKLO +#undef DO_HANDLE_NAN +#undef HANDLE_NAN1 +#undef HANDLE_NAN2 +#undef HANDLE_NAN3 #undef VECTOR_FOR_INORDER_I #undef HI_IDX #undef LO_IDX |