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MPILIB: disable usage of floating point registers on parisc 

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 <deller@gmx.de>
This commit is contained in:
Helge Deller 2013-05-05 22:08:22 +00:00
parent 17fdfd0851
commit 70ef5578dd
1 changed files with 3 additions and 2 deletions
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5
lib/mpi/longlong.h
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@ -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)); \