From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:41309) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Th5qK-00028G-1u for qemu-devel@nongnu.org; Fri, 07 Dec 2012 16:52:26 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Th5qE-0006A6-1L for qemu-devel@nongnu.org; Fri, 07 Dec 2012 16:52:23 -0500 Received: from mail-qa0-f45.google.com ([209.85.216.45]:50455) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Th5qD-00069y-Pk for qemu-devel@nongnu.org; Fri, 07 Dec 2012 16:52:17 -0500 Received: by mail-qa0-f45.google.com with SMTP id j15so2302588qaq.4 for ; Fri, 07 Dec 2012 13:52:17 -0800 (PST) Sender: Richard Henderson From: Richard Henderson Date: Fri, 7 Dec 2012 15:52:06 -0600 Message-Id: <1354917127-29718-2-git-send-email-rth@twiddle.net> In-Reply-To: <1354917127-29718-1-git-send-email-rth@twiddle.net> References: <1354917127-29718-1-git-send-email-rth@twiddle.net> Subject: [Qemu-devel] [PATCH 1/2] softfloat: Fix uint64_to_float64 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org 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 8413146..62830d7 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 ) { + shift64RightJamming(a, 1, &a); + exp += 1; + } + return normalizeRoundAndPackFloat64( 0, exp, a STATUS_VAR ); } /*---------------------------------------------------------------------------- -- 1.7.11.7