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erts/emulator/hipe/hipe_ppc_asm.m4

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`defarg(5,`r9')')dnl

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/*

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 * TEMP_ARG{0,1,2}:

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 *      Used by NBIF_SAVE_RESCHED_ARGS to save argument

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 *      registers in locations preserved by C.

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 *      May be registers or process-private memory locations.

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 *      Must not be C caller-save registers.

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 *      Must not overlap with any Erlang global registers.

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 *

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 * TEMP_ARG0:

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 *      Used in nbif_stack_trap_ra to preserve the return value.

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 *      Must be a C callee-save register.

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 *      Must be otherwise unused in the call path.

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 */

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`#define TEMP_ARG0      r27'

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`#define TEMP_ARG1      r26'

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`#define TEMP_ARG2      r25'

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dnl XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

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dnl X                                                           X

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`/* #define NBIF_RET_5  'NBIF_RET(5)` */'

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dnl

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dnl NBIF_SAVE_RESCHED_ARGS(ARITY)

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dnl Used in the expensive_bif_interface_{1,2,3}() macros to copy

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dnl caller-save argument registers to non-volatile locations.

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dnl Currently, 1 <= ARITY <= 3, so this simply moves the arguments

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dnl to C callee-save registers.

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dnl

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define(NBIF_MIN,`ifelse(eval($1 > $2),0,$1,$2)')dnl

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define(NBIF_SVA_1,`ifelse(eval($1 < NR_ARG_REGS),0,,`mr TEMP_ARG$1,ARG$1 SEMI ')')dnl

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define(NBIF_SVA_N,`ifelse(eval($1 >= 0),0,,`NBIF_SVA_N(eval($1-1))NBIF_SVA_1($1)')')dnl

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define(NBIF_SAVE_RESCHED_ARGS,`NBIF_SVA_N(eval(NBIF_MIN($1,NR_ARG_REGS)-1))')dnl

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`/* #define NBIF_SAVE_RESCHED_ARGS_1 'NBIF_SAVE_RESCHED_ARGS(1)` */'

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`/* #define NBIF_SAVE_RESCHED_ARGS_2 'NBIF_SAVE_RESCHED_ARGS(2)` */'

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`/* #define NBIF_SAVE_RESCHED_ARGS_3 'NBIF_SAVE_RESCHED_ARGS(3)` */'

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dnl

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dnl QUICK_CALL_RET(CFUN,ARITY)

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dnl Used in nocons_nofail and noproc primop interfaces to optimise

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dnl SAVE_CONTEXT_QUICK; bl CFUN; RESTORE_CONTEXT_QUICK; NBIF_RET(ARITY).

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