From mboxrd@z Thu Jan 1 00:00:00 1970 From: Helge Deller Subject: [PATCH] MPILIB: disable usage of floating point registers on parisc Date: Mon, 6 May 2013 00:08:22 +0200 Message-ID: <20130505220822.GA7819@p100.box> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii To: Dmitry Kasatkin , Linux Kernel Development , linux-parisc@vger.kernel.org Return-path: List-ID: List-Id: linux-parisc.vger.kernel.org The umul_ppmm() macro for parisc uses the xmpyu assembler statement which does calculation via a floating point register. But usage of floating point registers inside the Linux kernel are not allowed and gcc will stop compilation due to the -mdisable-fpregs compiler option. Fix this by disabling the umul_ppmm() and udiv_qrnnd() macros. The mpilib will then use the generic built-in implementations instead. Signed-off-by: Helge Deller diff --git a/lib/mpi/longlong.h b/lib/mpi/longlong.h index 095ab15..d411355 100644 --- a/lib/mpi/longlong.h +++ b/lib/mpi/longlong.h @@ -318,7 +318,8 @@ extern UDItype __udiv_qrnnd(); "rM" ((USItype)(bh)), \ "rM" ((USItype)(al)), \ "rM" ((USItype)(bl))) -#if defined(_PA_RISC1_1) +#if 0 && defined(_PA_RISC1_1) +/* xmpyu uses floating point register which is not allowed in Linux kernel. */ #define umul_ppmm(wh, wl, u, v) \ do { \ union {UDItype __ll; \ @@ -337,7 +338,7 @@ do { \ #define UMUL_TIME 40 #define UDIV_TIME 80 #endif -#ifndef LONGLONG_STANDALONE +#if 0 /* #ifndef LONGLONG_STANDALONE */ #define udiv_qrnnd(q, r, n1, n0, d) \ do { USItype __r; \ (q) = __udiv_qrnnd(&__r, (n1), (n0), (d)); \