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ppc: Define SETFIELD for the ppc target

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It keeps repeating, move it to the header. This uses __builtin_ffsll() to
allow using the macros in #define.

This is not using the QEMU's FIELD macros as this would require changing
all such macros found in skiboot (the PPC PowerNV firmware).

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <20220628080544.1509428-1-aik@ozlabs.ru>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
This commit is contained in:
Alexey Kardashevskiy 2022-06-28 18:05:44 +10:00 • committed by Daniel Henrique Barboza
parent b7d30fae5b
commit 95444afcab
5 changed files with 12 additions and 72 deletions
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12
target/ppc/cpu.h
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@ -47,6 +47,18 @@
PPC_BIT32(bs))
#define PPC_BITMASK8(bs, be) ((PPC_BIT8(bs) - PPC_BIT8(be)) | PPC_BIT8(bs))
/*
* QEMU version of the GETFIELD/SETFIELD macros from skiboot
*
* It might be better to use the existing extract64() and
* deposit64() but this means that all the register definitions will
* change and become incompatible with the ones found in skiboot.
*/
#define MASK_TO_LSH(m) (__builtin_ffsll(m) - 1)
#define GETFIELD(m, v) (((v) & (m)) >> MASK_TO_LSH(m))
#define SETFIELD(m, v, val) \
(((v) & ~(m)) | ((((typeof(v))(val)) << MASK_TO_LSH(m)) & (m)))
/*****************************************************************************/
/* Exception vectors definitions */
enum {