From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1LQ6pI-0007kR-Lf for qemu-devel@nongnu.org; Thu, 22 Jan 2009 16:11:00 -0500 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1LQ6pF-0007gc-Ln for qemu-devel@nongnu.org; Thu, 22 Jan 2009 16:10:59 -0500 Received: from [199.232.76.173] (port=32781 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1LQ6pF-0007gP-GF for qemu-devel@nongnu.org; Thu, 22 Jan 2009 16:10:57 -0500 Received: from mx20.gnu.org ([199.232.41.8]:41618) by monty-python.gnu.org with esmtps (TLS-1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.60) (envelope-from ) id 1LQ6pF-0007lM-9H for qemu-devel@nongnu.org; Thu, 22 Jan 2009 16:10:57 -0500 Received: from mail.codesourcery.com ([65.74.133.4]) by mx20.gnu.org with esmtp (Exim 4.60) (envelope-from ) id 1LQ6pE-0006W8-Jp for qemu-devel@nongnu.org; Thu, 22 Jan 2009 16:10:56 -0500 From: Nathan Froyd Date: Thu, 22 Jan 2009 12:44:02 -0800 Message-Id: <1232657054-30100-3-git-send-email-froydnj@codesourcery.com> In-Reply-To: <1232657054-30100-1-git-send-email-froydnj@codesourcery.com> References: <1232657054-30100-1-git-send-email-froydnj@codesourcery.com> Subject: [Qemu-devel] [PATCH 02/14] Add various NaN-handling macros Reply-To: qemu-devel@nongnu.org List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Nathan Froyd These simplify the implementation of the floating-point Altivec instructions and reduce clutter. Signed-off-by: Nathan Froyd --- 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 d531dd8..9820040 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) \ @@ -2808,6 +2825,10 @@ 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 -- 1.6.0.5