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| author | Atsushi Nemoto <anemo@mba.ocn.ne.jp> | 2006-05-22 17:47:41 +0200 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2006-06-19 18:39:13 +0200 |
| commit | c138e12f3a2e0421a4c8edf02587d2d394418679 (patch) | |
| tree | 66abbf27cbfc9030958b469aa4d826242417a752 /include/asm-mips/asmmacro-32.h | |
| parent | [MIPS] Malta: Handle byteswapping hardare bug in big endian mode. (diff) | |
| download | linux-c138e12f3a2e0421a4c8edf02587d2d394418679.tar.xz linux-c138e12f3a2e0421a4c8edf02587d2d394418679.zip | |
[MIPS] Fix fpu_save_double on 64-bit.
> Without this fix, _save_fp() in 64-bit kernel is seriously broken.
>
> ffffffff8010bec0 <_save_fp>:
> ffffffff8010bec0: 400d6000 mfc0 t1,c0_status
> ffffffff8010bec4: 000c7140 sll t2,t0,0x5
> ffffffff8010bec8: 05c10011 bgez t2,ffffffff8010bf10 <_save_fp+0x50>
> ffffffff8010becc: 00000000 nop
> ffffffff8010bed0: f4810328 sdc1 $f1,808(a0)
> ...
Fix register usage in fpu_save_double() and make fpu_restore_double()
more symmetric with fpu_save_double().
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'include/asm-mips/asmmacro-32.h')
| -rw-r--r-- | include/asm-mips/asmmacro-32.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/include/asm-mips/asmmacro-32.h b/include/asm-mips/asmmacro-32.h index 11daf5ceb7b4..5de3963f511e 100644 --- a/include/asm-mips/asmmacro-32.h +++ b/include/asm-mips/asmmacro-32.h @@ -12,7 +12,7 @@ #include <asm/fpregdef.h> #include <asm/mipsregs.h> - .macro fpu_save_double thread status tmp1=t0 tmp2 + .macro fpu_save_double thread status tmp1=t0 cfc1 \tmp1, fcr31 sdc1 $f0, THREAD_FPR0(\thread) sdc1 $f2, THREAD_FPR2(\thread) @@ -70,7 +70,7 @@ sw \tmp, THREAD_FCR31(\thread) .endm - .macro fpu_restore_double thread tmp=t0 + .macro fpu_restore_double thread status tmp=t0 lw \tmp, THREAD_FCR31(\thread) ldc1 $f0, THREAD_FPR0(\thread) ldc1 $f2, THREAD_FPR2(\thread) |