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linux/include/asm-sh/fpu.h

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sh: Bring the SH-5 FPU in line with the SH-4 FPU API. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-11-22 17:30:50 +09:00
sh: Fix occasional FPU register corruption under preempt. Presently with preempt enabled there's the possibility to be preempted after the TIF_USEDFPU test and the register save, leading to bogus state post-__switch_to(). Use an explicit preempt_disable()/enable() pair around unlazy_fpu()/clear_fpu() to avoid this. Follows the x86 change. Reported-by: Takuo Koguchi <takuo.koguchi.sw@hitachi.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-03-26 19:02:47 +09:00
sh: Bring the SH-5 FPU in line with the SH-4 FPU API. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-11-22 17:30:50 +09:00
sh: Fix TIF_USEDFPU clearing under FPU emulation. The unlazy_fpu() path calls in to save_fpu() if the task has TIF_USEDFPU set. save_fpu() being the crap API that it is has the side effect of clearing the flag itself, which presently doesn't happen if we're using FPU emulation. Fix this up for now, pending an overhaul in 2.6.26. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-03-26 19:09:21 +09:00
sh: Bring the SH-5 FPU in line with the SH-4 FPU API. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-11-22 17:30:50 +09:00
sh: Fix TIF_USEDFPU clearing under FPU emulation. The unlazy_fpu() path calls in to save_fpu() if the task has TIF_USEDFPU set. save_fpu() being the crap API that it is has the side effect of clearing the flag itself, which presently doesn't happen if we're using FPU emulation. Fix this up for now, pending an overhaul in 2.6.26. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-03-26 19:09:21 +09:00
sh: Bring the SH-5 FPU in line with the SH-4 FPU API. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-11-22 17:30:50 +09:00
sh: SH-2A FPU support. Signed-off-by: Kieran Bingham <kbingham@mpc-data.co.uk> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-11-26 20:38:36 +09:00
sh: Fix occasional FPU register corruption under preempt. Presently with preempt enabled there's the possibility to be preempted after the TIF_USEDFPU test and the register save, leading to bogus state post-__switch_to(). Use an explicit preempt_disable()/enable() pair around unlazy_fpu()/clear_fpu() to avoid this. Follows the x86 change. Reported-by: Takuo Koguchi <takuo.koguchi.sw@hitachi.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-03-26 19:02:47 +09:00
sh: Bring the SH-5 FPU in line with the SH-4 FPU API. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-11-22 17:30:50 +09:00