diff options
Diffstat (limited to 'gcc/config/convex/convex.c')
| -rw-r--r-- | gcc/config/convex/convex.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/gcc/config/convex/convex.c b/gcc/config/convex/convex.c index dcf3669..6f965a2 100644 --- a/gcc/config/convex/convex.c +++ b/gcc/config/convex/convex.c @@ -66,12 +66,15 @@ static rtx convert_arg_pushes (); static void expand_movstr_call PARAMS ((rtx *)); static void convex_output_function_prologue PARAMS ((FILE *, HOST_WIDE_INT)); static void convex_output_function_epilogue PARAMS ((FILE *, HOST_WIDE_INT)); +static int convex_adjust_cost PARAMS ((rtx, rtx, rtx, int)); /* Initialize the GCC target structure. */ #undef TARGET_ASM_FUNCTION_PROLOGUE #define TARGET_ASM_FUNCTION_PROLOGUE convex_output_function_prologue #undef TARGET_ASM_FUNCTION_EPILOGUE #define TARGET_ASM_FUNCTION_EPILOGUE convex_output_function_epilogue +#undef TARGET_SCHED_ADJUST_COST +#define TARGET_SCHED_ADJUST_COST convex_adjust_cost struct gcc_target targetm = TARGET_INITIALIZER; @@ -111,6 +114,43 @@ convex_output_function_epilogue (file, size) fprintf (file, "\tds.h 0\n"); } +/* Adjust the cost of dependences. */ +static int +convex_adjust_cost (insn, link, dep, cost) + rtx insn; + rtx link; + rtx dep; + int cost; +{ + /* Antidependencies don't block issue. */ + if (REG_NOTE_KIND (link) != 0) + cost = 0; + /* C38 situations where delay depends on context */ + else if (TARGET_C38 + && GET_CODE (PATTERN (insn)) == SET + && GET_CODE (PATTERN (dep)) == SET) + { + enum attr_type insn_type = get_attr_type (insn); + enum attr_type dep_type = get_attr_type (dep); + /* index register must be ready one cycle early */ + if (insn_type == TYPE_MLDW || insn_type == TYPE_MLDL + || (insn_type == TYPE_MST + && reg_mentioned_p (SET_DEST (PATTERN (dep)), + SET_SRC (PATTERN (insn))))) + cost += 1; + /* alu forwarding off alu takes two */ + if (dep_type == TYPE_ALU + && insn_type != TYPE_ALU + && ! (insn_type == TYPE_MST + && SET_DEST (PATTERN (dep)) == SET_SRC (PATTERN (insn)))) + cost += 1; + } + + return cost; +} + + + /* Here from OVERRIDE_OPTIONS at startup. Initialize constant tables. */ void |