| Message ID | 17bb5945-3d04-2eef-5413-7ccde0b3b4b9@bell.net (mailing list archive) |
|---|---|
| State | Accepted, archived |
| Headers | show |
| Series | parisc: Define depi_safe macro | expand |
diff --git a/arch/parisc/include/asm/assembly.h b/arch/parisc/include/asm/assembly.h index 6d13ae236fcb..6369082c6c74 100644 --- a/arch/parisc/include/asm/assembly.h +++ b/arch/parisc/include/asm/assembly.h @@ -158,6 +158,16 @@ #endif .endm + /* The depi instruction leaves the most significant 32 bits of the + * target register in an undefined state on PA 2.0 systems. */ + .macro depi_safe i, p, len, t +#ifdef CONFIG_64BIT + depdi \i, 32+(\p), \len, \t +#else + depi \i, \p, \len, \t +#endif + .endm + /* load 32-bit 'value' into 'reg' compensating for the ldil * sign-extension when running in wide mode. * WARNING!! neither 'value' nor 'reg' can be expressions
Define depi_safe macro. The depi instruction is similar to the extru instruction on 64-bit machines. It leaves the most-significant 32 bits of the target register in an undefined state. On 64-bit machines, the macro uses depdi to perform safe deposits in the least-significant 32 bits. Signed-off-by: John David Anglin <dave.anglin@bell.net> ---