From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:48898) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1THP7e-0004VU-St for qemu-devel@nongnu.org; Thu, 27 Sep 2012 21:12:07 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1THP7e-00036x-1f for qemu-devel@nongnu.org; Thu, 27 Sep 2012 21:12:06 -0400 Received: from mail-da0-f45.google.com ([209.85.210.45]:35946) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1THP7d-00036l-Rt for qemu-devel@nongnu.org; Thu, 27 Sep 2012 21:12:05 -0400 Received: by dadn15 with SMTP id n15so526703dad.4 for ; Thu, 27 Sep 2012 18:12:05 -0700 (PDT) Sender: Richard Henderson From: Richard Henderson Date: Thu, 27 Sep 2012 18:12:01 -0700 Message-Id: <1348794721-28534-1-git-send-email-rth@twiddle.net> In-Reply-To: <1348785610-23418-1-git-send-email-rth@twiddle.net> References: <1348785610-23418-1-git-send-email-rth@twiddle.net> Subject: [Qemu-devel] [PATCH 135/147] softfloat: Fix uint64_to_float64 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Alexander Graf The interface to normalizeRoundAndPackFloat64 requires that the high bit be clear. Perform one shift-right-and-jam if needed. Signed-off-by: Richard Henderson --- fpu/softfloat.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/fpu/softfloat.c b/fpu/softfloat.c index b29256a..45f105a 100644 --- a/fpu/softfloat.c +++ b/fpu/softfloat.c @@ -1273,9 +1273,14 @@ float64 int64_to_float64( int64 a STATUS_PARAM ) float64 uint64_to_float64( uint64 a STATUS_PARAM ) { - if ( a == 0 ) return float64_zero; - return normalizeRoundAndPackFloat64( 0, 0x43C, a STATUS_VAR ); + int exp = 0x43C; + if ( a == 0 ) return float64_zero; + if ( (int64_t)a < 0 ) { + a = (a >> 1) | (a & 1); + exp += 1; + } + return normalizeRoundAndPackFloat64( 0, exp, a STATUS_VAR ); } /*---------------------------------------------------------------------------- -- 1.7.11.4