/*
* Register Usage according the SVR4 ABI for PPC.
*
* Register Usage
* r0 Volatile register which may be modified during function linkage
* r1 Stack frame pointer, always valid
* r2 System-reserved register
* r3-r4 Volatile registers used for parameter passing and return values
* r5-r10 Volatile registers used for parameter passing
* r11-r12 Volatile register which may be modified during function linkage
* r13 Small data area pointer register
* f0 Volatile register
* f1 Volatile registers used for parameter passing and return values
* f2-f8 Volatile registers used for parameter passing
* f9-f13 Volatile registers
*
* [Start of callee-saved registers]
* r14-r30 Registers used for local variables
* r31 Used for local variable or "environment pointers"
* f14-f31 Registers used for local variables
*
*
* Register Usage according the ELF64 ABI (PowerOpen/AIX) for PPC.
*
* Register Usage
* r0 Volatile register which may be modified during function linkage
* r1 Stack frame pointer, always valid
* r2 TOC pointer
* r3 Volatile register used for parameter passing and return value
* r4-r10 Volatile registers used for parameter passing
* r11 Volatile register used in calls by pointer and as an
* environment pointer for languages which require one
* r12 Volatile register used for exception handling and glink code
* r13 Reserved for use as system thread ID
*
* f0 Volatile register
* f1-f4 Volatile registers used for parameter passing and return values
* f5-f13 Volatile registers used for parameter passing
* [Start of callee-saved registers]
* r14-r31 Registers used for local variables
* f14-f31 Registers used for local variables
*
*/
struct reg { /* base registers */
__register_t fixreg[32];
__register_t lr; /* Link Register */
int cr; /* Condition Register */
int xer; /* SPR 1 */
__register_t ctr; /* Count Register */
__register_t pc; /* Program Counter */
};
struct fpreg { /* Floating Point registers */
#ifdef _KERNEL
uint64_t fpreg[32];
uint64_t fpscr; /* Status and Control Register */
#else
double fpreg[32];
double fpscr; /* Status and Control Register */
#endif
};
struct vreg { /* Vector registers */
uint32_t vreg[32][4];
__register_t vrsave; /* SPR 256 */
__register_t spare[2]; /* filler */
__register_t vscr; /* Vector Status And Control Register */
};
