diff options
| author | Arnd Bergmann <arnd@arndb.de> | 2012-02-27 12:58:59 +0000 |
|---|---|---|
| committer | Arnd Bergmann <arnd@arndb.de> | 2012-02-27 12:59:03 +0000 |
| commit | d0cdd82c6e0944df733b28f5d4cbbe97298587e4 (patch) | |
| tree | 9de205625a4657fedbfae52c65ea017beb7509a8 /lib/mpi/longlong.h | |
| parent | 747303a383d59a4d4667152fb68293dd9ff06438 (diff) | |
| parent | 9418ba306688c0b77a8548b3281ba3d130036516 (diff) | |
Merge branch 'imx-fixes' of git://git.pengutronix.de/git/imx/linux-2.6 into next/fixes-non-critical
* 'imx-fixes' of git://git.pengutronix.de/git/imx/linux-2.6: (247 commits)
ARM: mach-imx: mx3: Fix section mismatch in imx3_init_l2x0()
ARM: imx_v4_v5_defconfig: Fix the selection of 32 bit flash support for iMX21ADS board
ARM: mach-pcm038: Fix field name of regulator_consumer_supply struct
Also includes an update to v3.3-rc3
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'lib/mpi/longlong.h')
| -rw-r--r-- | lib/mpi/longlong.h | 44 |
1 files changed, 33 insertions, 11 deletions
diff --git a/lib/mpi/longlong.h b/lib/mpi/longlong.h index b87487b40a8..29f98624ef9 100644 --- a/lib/mpi/longlong.h +++ b/lib/mpi/longlong.h @@ -1200,18 +1200,40 @@ do { \ "r" ((USItype)(v)) \ : "%g1", "%g2" __AND_CLOBBER_CC) #define UMUL_TIME 39 /* 39 instructions */ -#endif -#ifndef udiv_qrnnd -#ifndef LONGLONG_STANDALONE +/* It's quite necessary to add this much assembler for the sparc. + The default udiv_qrnnd (in C) is more than 10 times slower! */ #define udiv_qrnnd(q, r, n1, n0, d) \ -do { USItype __r; \ - (q) = __udiv_qrnnd(&__r, (n1), (n0), (d)); \ - (r) = __r; \ -} while (0) - extern USItype __udiv_qrnnd(); -#define UDIV_TIME 140 -#endif /* LONGLONG_STANDALONE */ -#endif /* udiv_qrnnd */ + __asm__ ("! Inlined udiv_qrnnd\n\t" \ + "mov 32,%%g1\n\t" \ + "subcc %1,%2,%%g0\n\t" \ + "1: bcs 5f\n\t" \ + "addxcc %0,%0,%0 ! shift n1n0 and a q-bit in lsb\n\t" \ + "sub %1,%2,%1 ! this kills msb of n\n\t" \ + "addx %1,%1,%1 ! so this can't give carry\n\t" \ + "subcc %%g1,1,%%g1\n\t" \ + "2: bne 1b\n\t" \ + "subcc %1,%2,%%g0\n\t" \ + "bcs 3f\n\t" \ + "addxcc %0,%0,%0 ! shift n1n0 and a q-bit in lsb\n\t" \ + "b 3f\n\t" \ + "sub %1,%2,%1 ! this kills msb of n\n\t" \ + "4: sub %1,%2,%1\n\t" \ + "5: addxcc %1,%1,%1\n\t" \ + "bcc 2b\n\t" \ + "subcc %%g1,1,%%g1\n\t" \ + "! Got carry from n. Subtract next step to cancel this carry.\n\t" \ + "bne 4b\n\t" \ + "addcc %0,%0,%0 ! shift n1n0 and a 0-bit in lsb\n\t" \ + "sub %1,%2,%1\n\t" \ + "3: xnor %0,0,%0\n\t" \ + "! End of inline udiv_qrnnd\n" \ + : "=&r" ((USItype)(q)), \ + "=&r" ((USItype)(r)) \ + : "r" ((USItype)(d)), \ + "1" ((USItype)(n1)), \ + "0" ((USItype)(n0)) : "%g1", "cc") +#define UDIV_TIME (3+7*32) /* 7 instructions/iteration. 32 iterations. */ +#endif #endif /* __sparc__ */ /*************************************** |