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| author | Christophe Leroy <christophe.leroy@c-s.fr> | 2019-08-20 17:34:14 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2019-08-27 06:03:36 +0300 |
| commit | d7fb5b18a540efaf05da2b980fc11d50ba775677 (patch) | |
| tree | 6e88bfda47b1df1f090386a691b3c5f4540b378c /arch/powerpc/kernel/head_64.S | |
| parent | ba18025fb03306ccdf3557a1e7b8a5b39b474872 (diff) | |
| download | linux-d7fb5b18a540efaf05da2b980fc11d50ba775677.tar.xz | |
powerpc/64: optimise LOAD_REG_IMMEDIATE_SYM()
Optimise LOAD_REG_IMMEDIATE_SYM() using a temporary register to
parallelise operations.
It reduces the path from 5 to 3 instructions.
Suggested-by: Segher Boessenkool <segher@kernel.crashing.org>
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/bad41ed02531bb0382420cbab50a0d7153b71767.1566311636.git.christophe.leroy@c-s.fr
Diffstat (limited to 'arch/powerpc/kernel/head_64.S')
| -rw-r--r-- | arch/powerpc/kernel/head_64.S | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/head_64.S b/arch/powerpc/kernel/head_64.S index 1fd44761e997..0f2d61af47cc 100644 --- a/arch/powerpc/kernel/head_64.S +++ b/arch/powerpc/kernel/head_64.S @@ -635,7 +635,7 @@ __after_prom_start: sub r5,r5,r11 #else /* just copy interrupts */ - LOAD_REG_IMMEDIATE_SYM(r5, FIXED_SYMBOL_ABS_ADDR(__end_interrupts)) + LOAD_REG_IMMEDIATE_SYM(r5, r11, FIXED_SYMBOL_ABS_ADDR(__end_interrupts)) #endif b 5f 3: |