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| author | Paul Burton <paul.burton@imgtec.com> | 2014-01-15 10:31:49 (GMT) |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2014-03-06 20:25:22 (GMT) |
| commit | 1d68808748afe21ac35bedc2726043bea33a1c0d (patch) | |
| tree | 974825b032e342da5754e78a3f7f77b65ec0fe1e | |
| parent | 6d9727a7a58e11c09d28a67345d9a186fcbbdd8f (diff) | |
| download | linux-1d68808748afe21ac35bedc2726043bea33a1c0d.tar.xz | |
MIPS: Introduce _EXT assembler macro
This patch adds a simple macro to wrap the ext instruction which was
introduced with MIPSR2, and fall back to a shift & and pair for
pre-MIPSR2 CPUs. This will be used in a subsequent patch.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/6358/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| -rw-r--r-- | arch/mips/include/asm/asmmacro.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/mips/include/asm/asmmacro.h b/arch/mips/include/asm/asmmacro.h index 3220c93..ef066b1 100644 --- a/arch/mips/include/asm/asmmacro.h +++ b/arch/mips/include/asm/asmmacro.h @@ -169,6 +169,17 @@ fpu_restore_16even \thread \tmp .endm +#ifdef CONFIG_CPU_MIPSR2 + .macro _EXT rd, rs, p, s + ext \rd, \rs, \p, \s + .endm +#else /* !CONFIG_CPU_MIPSR2 */ + .macro _EXT rd, rs, p, s + srl \rd, \rs, \p + andi \rd, \rd, (1 << \s) - 1 + .endm +#endif /* !CONFIG_CPU_MIPSR2 */ + /* * Temporary until all gas have MT ASE support */ |