diff options
Diffstat (limited to 'gcc/config/arc/arc.c')
| -rw-r--r-- | gcc/config/arc/arc.c | 124 |
1 files changed, 63 insertions, 61 deletions
diff --git a/gcc/config/arc/arc.c b/gcc/config/arc/arc.c index 2048bd3e06e..bd2afc015f1 100644 --- a/gcc/config/arc/arc.c +++ b/gcc/config/arc/arc.c @@ -97,6 +97,7 @@ static void arc_output_function_epilogue PARAMS ((FILE *, HOST_WIDE_INT)); static void arc_encode_section_info PARAMS ((tree, int)); static void arc_internal_label PARAMS ((FILE *, const char *, unsigned long)); static bool arc_rtx_costs PARAMS ((rtx, int, int, int *)); +static int arc_address_cost PARAMS ((rtx)); /* Initialize the GCC target structure. */ #undef TARGET_ASM_ALIGNED_HI_OP @@ -119,6 +120,8 @@ static bool arc_rtx_costs PARAMS ((rtx, int, int, int *)); #undef TARGET_RTX_COSTS #define TARGET_RTX_COSTS arc_rtx_costs +#undef TARGET_ADDRESS_COST +#define TARGET_ADDRESS_COST arc_address_cost struct gcc_target targetm = TARGET_INITIALIZER; @@ -842,18 +845,75 @@ arc_setup_incoming_varargs (cum, mode, type, pretend_size, no_rtl) /* Cost functions. */ +/* Compute a (partial) cost for rtx X. Return true if the complete + cost has been computed, and false if subexpressions should be + scanned. In either case, *TOTAL contains the cost result. */ + +static bool +arc_rtx_costs (x, code, outer_code, total) + rtx x; + int code; + int outer_code ATTRIBUTE_UNUSED; + int *total; +{ + switch (code) + { + /* Small integers are as cheap as registers. 4 byte values can + be fetched as immediate constants - let's give that the cost + of an extra insn. */ + case CONST_INT: + if (SMALL_INT (INTVAL (x))) + { + *total = 0; + return true; + } + /* FALLTHRU */ + + case CONST: + case LABEL_REF: + case SYMBOL_REF: + *total = COSTS_N_INSNS (1); + return true; + + case CONST_DOUBLE: + { + rtx high, low; + split_double (x, &high, &low); + *total = COSTS_N_INSNS (!SMALL_INT (INTVAL (high)) + + !SMALL_INT (INTVAL (low))); + return true; + } + + /* Encourage synth_mult to find a synthetic multiply when reasonable. + If we need more than 12 insns to do a multiply, then go out-of-line, + since the call overhead will be < 10% of the cost of the multiply. */ + case ASHIFT: + case ASHIFTRT: + case LSHIFTRT: + if (TARGET_SHIFTER) + *total = COSTS_N_INSNS (1); + else if (GET_CODE (XEXP (x, 1)) != CONST_INT) + *total = COSTS_N_INSNS (16); + else + *total = COSTS_N_INSNS (INTVAL (XEXP ((x), 1))); + return false; + + default: + return false; + } +} + + /* Provide the costs of an addressing mode that contains ADDR. If ADDR is not a valid address, its cost is irrelevant. */ -int +static int arc_address_cost (addr) rtx addr; { switch (GET_CODE (addr)) { case REG : - /* This is handled in the macro that calls us. - It's here for documentation. */ return 1; case LABEL_REF : @@ -2380,61 +2440,3 @@ arc_internal_label (stream, prefix, labelno) arc_ccfsm_at_label (prefix, labelno); default_internal_label (stream, prefix, labelno); } - -/* Compute a (partial) cost for rtx X. Return true if the complete - cost has been computed, and false if subexpressions should be - scanned. In either case, *TOTAL contains the cost result. */ - -static bool -arc_rtx_costs (x, code, outer_code, total) - rtx x; - int code; - int outer_code ATTRIBUTE_UNUSED; - int *total; -{ - switch (code) - { - /* Small integers are as cheap as registers. 4 byte values can - be fetched as immediate constants - let's give that the cost - of an extra insn. */ - case CONST_INT: - if (SMALL_INT (INTVAL (x))) - { - *total = 0; - return true; - } - /* FALLTHRU */ - - case CONST: - case LABEL_REF: - case SYMBOL_REF: - *total = COSTS_N_INSNS (1); - return true; - - case CONST_DOUBLE: - { - rtx high, low; - split_double (x, &high, &low); - *total = COSTS_N_INSNS (!SMALL_INT (INTVAL (high)) - + !SMALL_INT (INTVAL (low))); - return true; - } - - /* Encourage synth_mult to find a synthetic multiply when reasonable. - If we need more than 12 insns to do a multiply, then go out-of-line, - since the call overhead will be < 10% of the cost of the multiply. */ - case ASHIFT: - case ASHIFTRT: - case LSHIFTRT: - if (TARGET_SHIFTER) - *total = COSTS_N_INSNS (1); - else if (GET_CODE (XEXP (x, 1)) != CONST_INT) - *total = COSTS_N_INSNS (16); - else - *total = COSTS_N_INSNS (INTVAL (XEXP ((x), 1))); - return false; - - default: - return false; - } -} |