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Giuseppe CAVALLARO d53e4307c2 sh: Use GCC __builtin_prefetch() to implement prefetch(). ... GCC's __builtin_prefetch() was introduced a long time ago, all supported GCC versions have it. So this patch is to use it for implementing the prefetch on SH2A and SH4. The current prefetch implementation is almost equivalent with __builtin_prefetch. The third parameter in the __builtin_prefetch is the locality that it's not supported on SH architectures. It has been set to three and it should be verified if it's suitable for SH2A as well. I didn't test on this architecture. The builtin usage should be more efficient that an __asm__ because less barriers, and because the compiler doesn't see the inst as a "black box" allowing better code generation. This has been already done on other architectures (see the commit: 0453fb3c52). Many thanks to Christian Bruel <christain.bruel@st.com> for his support on evaluate the impact of the gcc built-in on SH4 arch. No regressions found while testing with LMbench on STLinux targets. Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com> Signed-off-by: Stuart Menefy <stuart.menefy@st.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>		14 years ago
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asm	sh: Use GCC __builtin_prefetch() to implement prefetch().	14 years ago
cpu-common/cpu	…
cpu-sh2/cpu	sh: Mass ctrl_in/outX to __raw_read/writeX conversion.	15 years ago
cpu-sh2a/cpu	…
cpu-sh3/cpu	sh: Fix up the SH-3 build.	15 years ago
cpu-sh4/cpu	sh: pinmux support for SH-X3 proto CPUs.	15 years ago
cpu-sh5/cpu	…
mach-common/mach	sh: mach-edosk7705: Kill off machtype, consolidate board def.	14 years ago
mach-dreamcast/mach	sh: mach-dreamcast: Convert to sparseirq.	15 years ago
mach-ecovec24/mach	sh: add romImage MMCIF boot for sh7724 and Ecovec V2	15 years ago
mach-kfr2r09/mach	sh: add a parameter to LCDC driver's .display_on() callback	15 years ago
mach-landisk/mach	…
mach-migor/mach	sh: audio support for the sh7722 Migo-R board	15 years ago
mach-sdk7786/mach	sh: mach-sdk7786: Add support for the FPGA SRAM.	15 years ago
mach-se/mach	sh: mach-se: Convert SE7343 FPGA to dynamic IRQ allocation.	15 years ago
mach-sh03/mach	…
mach-x3proto/mach	sh: mach-x3proto: Support for baseboard GPIOs.	15 years ago