It contradicts commit a85c728cb5e1 ("powerpc/32: Don't use lmw/stmw for
saving/restoring non volatile regs")
Le 31/10/2022 à 06:54, Nicholas Piggin a écrit :
> ---
> arch/powerpc/include/asm/ppc_asm.h | 18 ++++++++++++++++--
> 1 file changed, 16 insertions(+), 2 deletions(-)
>
> diff --git a/arch/powerpc/include/asm/ppc_asm.h
> b/arch/powerpc/include/asm/ppc_asm.h
> index 753a2757bcd4..ac44383d350a 100644
> --- a/arch/powerpc/include/asm/ppc_asm.h
> +++ b/arch/powerpc/include/asm/ppc_asm.h
> @@ -57,8 +57,22 @@
> #define SAVE_NVGPRS(base) SAVE_GPRS(14, 31, base)
> #define REST_NVGPRS(base) REST_GPRS(14, 31, base)
> #else
> -#define SAVE_GPRS(start, end, base) OP_REGS stw, 4, start, end, base, GPR0
> -#define REST_GPRS(start, end, base) OP_REGS lwz, 4, start, end, base, GPR0
> +.macro __SAVE_GPRS start, end, base, offset
> + .if \end == 31
> + stmw \start,\offset(\base)
> + .else
> + OP_REGS stw, 4, \start, \end, \base, \offset
> + .endif
> +.endm
> +.macro __REST_GPRS start, end, base, offset
> + .if \end == 31
> + lmw \start,\offset(\base)
> + .else
> + OP_REGS lwz, 4, \start, \end, \base, \offset
> + .endif
> +.endm
> +#define SAVE_GPRS(start, end, base) __SAVE_GPRS start, end, base, GPR0
> +#define REST_GPRS(start, end, base) __REST_GPRS start, end, base, GPR0
> #define SAVE_NVGPRS(base) SAVE_GPRS(13, 31, base)
> #define REST_NVGPRS(base) REST_GPRS(13, 31, base)
> #endif
