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| author |   Christophe Leroy <christophe.leroy@c-s.fr> | 2018-04-17 19:08:18 +0200 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2018-05-18 00:09:06 +1000 |
| commit | a1f3ae3fe8a1883c339f1bc89d1c941b3809e084 (patch) | |
| tree | d830fbdffa3dac41aba47c6683b3fe08413ebc7e /arch/powerpc/include/asm/ppc_asm.h | |
| parent | powerpc: Avoid an unnecessary test and branch in longjmp() (diff) | |
| download | linux-dev-a1f3ae3fe8a1883c339f1bc89d1c941b3809e084.tar.xz linux-dev-a1f3ae3fe8a1883c339f1bc89d1c941b3809e084.zip | |
powerpc/32: Use stmw/lmw for registers save/restore in asm
arch/powerpc/Makefile activates -mmultiple on BE PPC32 configs
in order to use multiple word instructions in functions entry/exit.
The patch does the same for the asm parts, for consistency.
On processors like the 8xx on which insn fetching is pretty slow,
this speeds up registers save/restore.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
[mpe: PPC32 is BE only, so drop the endian checks]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/include/asm/ppc_asm.h')
| -rw-r--r-- | arch/powerpc/include/asm/ppc_asm.h | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/arch/powerpc/include/asm/ppc_asm.h b/arch/powerpc/include/asm/ppc_asm.h index 13f7f4c0e1ea..75ece56dcd62 100644 --- a/arch/powerpc/include/asm/ppc_asm.h +++ b/arch/powerpc/include/asm/ppc_asm.h @@ -80,10 +80,8 @@ END_FW_FTR_SECTION_IFSET(FW_FEATURE_SPLPAR) #else #define SAVE_GPR(n, base) stw n,GPR0+4*(n)(base) #define REST_GPR(n, base) lwz n,GPR0+4*(n)(base) -#define SAVE_NVGPRS(base) SAVE_GPR(13, base); SAVE_8GPRS(14, base); \ - SAVE_10GPRS(22, base) -#define REST_NVGPRS(base) REST_GPR(13, base); REST_8GPRS(14, base); \ - REST_10GPRS(22, base) +#define SAVE_NVGPRS(base) stmw 13, GPR0+4*13(base) +#define REST_NVGPRS(base) lmw 13, GPR0+4*13(base) #endif #define SAVE_2GPRS(n, base) SAVE_GPR(n, base); SAVE_GPR(n+1, base) |