diff options
Diffstat (limited to 'gcc/config/m32r/m32r.c')
| -rw-r--r-- | gcc/config/m32r/m32r.c | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/gcc/config/m32r/m32r.c b/gcc/config/m32r/m32r.c index a004eed..6d4f2a3 100644 --- a/gcc/config/m32r/m32r.c +++ b/gcc/config/m32r/m32r.c @@ -80,6 +80,7 @@ static void m32r_select_section PARAMS ((tree, int, unsigned HOST_WIDE_INT)); static void m32r_encode_section_info PARAMS ((tree, int)); static const char *m32r_strip_name_encoding PARAMS ((const char *)); static void init_idents PARAMS ((void)); +static bool m32r_rtx_costs PARAMS ((rtx, int, int, int *)); /* Initialize the GCC target structure. */ #undef TARGET_ATTRIBUTE_TABLE @@ -113,6 +114,9 @@ static void init_idents PARAMS ((void)); #undef TARGET_STRIP_NAME_ENCODING #define TARGET_STRIP_NAME_ENCODING m32r_strip_name_encoding +#undef TARGET_RTX_COSTS +#define TARGET_RTX_COSTS m32r_rtx_costs + struct gcc_target targetm = TARGET_INITIALIZER; /* Called by OVERRIDE_OPTIONS to initialize various things. */ @@ -1751,6 +1755,56 @@ m32r_variable_issue (stream, verbose, insn, how_many) /* Cost functions. */ +static bool +m32r_rtx_costs (x, code, outer_code, total) + rtx x; + int code, 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 (INT16_P (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 (!INT16_P (INTVAL (high)) + + !INT16_P (INTVAL (low))); + return true; + } + + case MULT: + *total = COSTS_N_INSNS (3); + return true; + + case DIV: + case UDIV: + case MOD: + case UMOD: + *total = COSTS_N_INSNS (10); + return true; + + default: + return false; + } +} + /* Provide the costs of an addressing mode that contains ADDR. If ADDR is not a valid address, its cost is irrelevant. |