From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:43631) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TSzRQ-00079i-7I for qemu-devel@nongnu.org; Mon, 29 Oct 2012 20:12:25 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1TSzRM-0005CX-Kj for qemu-devel@nongnu.org; Mon, 29 Oct 2012 20:12:24 -0400 Received: from hall.aurel32.net ([88.191.126.93]:39639) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TSzRM-0005BU-Bd for qemu-devel@nongnu.org; Mon, 29 Oct 2012 20:12:20 -0400 From: Aurelien Jarno Date: Tue, 30 Oct 2012 01:11:56 +0100 Message-Id: <1351555932-19695-4-git-send-email-aurelien@aurel32.net> In-Reply-To: <1351555932-19695-1-git-send-email-aurelien@aurel32.net> References: <1351555932-19695-1-git-send-email-aurelien@aurel32.net> Subject: [Qemu-devel] [PATCH v2 03/19] softfloat: implement fused multiply-add NaN propagation for MIPS List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Peter Maydell , Aurelien Jarno Add a pickNaNMulAdd function for MIPS, implementing NaN propagation rules for MIPS fused multiply-add instructions. Cc: Peter Maydell Signed-off-by: Aurelien Jarno --- fpu/softfloat-specialize.h | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) diff --git a/fpu/softfloat-specialize.h b/fpu/softfloat-specialize.h index a1d489e..518f694 100644 --- a/fpu/softfloat-specialize.h +++ b/fpu/softfloat-specialize.h @@ -486,6 +486,33 @@ static int pickNaNMulAdd(flag aIsQNaN, flag aIsSNaN, flag bIsQNaN, flag bIsSNaN, return 1; } } +#elif defined(TARGET_MIPS) +static int pickNaNMulAdd(flag aIsQNaN, flag aIsSNaN, flag bIsQNaN, flag bIsSNaN, + flag cIsQNaN, flag cIsSNaN, flag infzero STATUS_PARAM) +{ + /* For MIPS, the (inf,zero,qnan) case sets InvalidOp and returns + * the default NaN + */ + if (infzero) { + float_raise(float_flag_invalid STATUS_VAR); + return 3; + } + + /* Prefer sNaN over qNaN, in the a, b, c order. */ + if (aIsSNaN) { + return 0; + } else if (bIsSNaN) { + return 1; + } else if (cIsSNaN) { + return 2; + } else if (aIsQNaN) { + return 0; + } else if (bIsQNaN) { + return 1; + } else { + return 2; + } +} #elif defined(TARGET_PPC) static int pickNaNMulAdd(flag aIsQNaN, flag aIsSNaN, flag bIsQNaN, flag bIsSNaN, flag cIsQNaN, flag cIsSNaN, flag infzero STATUS_PARAM) -- 1.7.10.4