diff options
Diffstat (limited to 'gcc/config/m88k/m88k.c')
| -rw-r--r-- | gcc/config/m88k/m88k.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/gcc/config/m88k/m88k.c b/gcc/config/m88k/m88k.c index 1c0bd15..34ca914 100644 --- a/gcc/config/m88k/m88k.c +++ b/gcc/config/m88k/m88k.c @@ -72,6 +72,8 @@ static void m88k_output_function_begin_epilogue PARAMS ((FILE *)); static void m88k_svr3_asm_out_constructor PARAMS ((rtx, int)); static void m88k_svr3_asm_out_destructor PARAMS ((rtx, int)); #endif + +static int m88k_adjust_cost PARAMS ((rtx, rtx, rtx, int)); /* Initialize the GCC target structure. */ #undef TARGET_ASM_FUNCTION_PROLOGUE @@ -83,6 +85,9 @@ static void m88k_svr3_asm_out_destructor PARAMS ((rtx, int)); #undef TARGET_ASM_FUNCTION_EPILOGUE #define TARGET_ASM_FUNCTION_EPILOGUE m88k_output_function_epilogue +#undef TARGET_SCHED_ADJUST_COST +#define TARGET_SCHED_ADJUST_COST m88k_adjust_cost + struct gcc_target targetm = TARGET_INITIALIZER; /* Determine what instructions are needed to manufacture the integer VALUE @@ -3316,3 +3321,30 @@ m88k_svr3_asm_out_destructor (symbol, priority) assemble_integer (constm1_rtx, UNITS_PER_WORD, BITS_PER_WORD, 1); } #endif + +/* Adjust the cost of INSN based on the relationship between INSN that + is dependent on DEP_INSN through the dependence LINK. The default + is to make no adjustment to COST. + + On the m88k, ignore the cost of anti- and output-dependencies. On + the m88100, a store can issue two cycles before the value (not the + address) has finished computing. */ + +static int +m88k_adjust_cost (insn, link, dep, cost) + rtx insn; + rtx link; + rtx dep; + int cost; +{ + if (REG_NOTE_KIND (link) != 0) + return 0; /* Anti or output dependence. */ + + if (! TARGET_88100 + && recog_memoized (insn) >= 0 + && get_attr_type (insn) == TYPE_STORE + && SET_SRC (PATTERN (insn)) == SET_DEST (PATTERN (dep))) + return cost - 4; /* 88110 store reservation station. */ + + return cost; +} |