diff options
Diffstat (limited to 'gcc/config/c4x/c4x.h')
| -rw-r--r-- | gcc/config/c4x/c4x.h | 99 |
1 files changed, 3 insertions, 96 deletions
diff --git a/gcc/config/c4x/c4x.h b/gcc/config/c4x/c4x.h index c878112daa8..891ed4bf200 100644 --- a/gcc/config/c4x/c4x.h +++ b/gcc/config/c4x/c4x.h @@ -1461,103 +1461,10 @@ CUMULATIVE_ARGS; /* Descripting Relative Cost of Operations. */ -/* Provide the costs of a rtl expression. This is in the body of a - switch on CODE. - - Note that we return, rather than break so that rtx_cost doesn't - include CONST_COSTS otherwise expand_mult will think that it is - cheaper to synthesize a multiply rather than to use a multiply - instruction. I think this is because the algorithm synth_mult - doesn't take into account the loading of the operands, whereas the - calculation of mult_cost does. -*/ - - -#define RTX_COSTS(RTX, CODE, OUTER_CODE) \ - case PLUS: \ - case MINUS: \ - case AND: \ - case IOR: \ - case XOR: \ - case ASHIFT: \ - case ASHIFTRT: \ - case LSHIFTRT: \ - return COSTS_N_INSNS (1); \ - case MULT: \ - return COSTS_N_INSNS (GET_MODE_CLASS (GET_MODE (RTX)) == MODE_FLOAT \ - || TARGET_MPYI ? 1 : 14); \ - case DIV: \ - case UDIV: \ - case MOD: \ - case UMOD: \ - return COSTS_N_INSNS (GET_MODE_CLASS (GET_MODE (RTX)) == MODE_FLOAT \ - ? 15 : 50); - -/* Compute the cost of computing a constant rtl expression RTX - whose rtx-code is CODE. The body of this macro is a portion - of a switch statement. If the code is computed here, - return it with a return statement. Otherwise, break from the switch. - - An insn is assumed to cost 4 units. - COSTS_N_INSNS (N) is defined as (N) * 4 - 2. - - Some small integers are effectively free for the C40. We should - also consider if we are using the small memory model. With - the big memory model we require an extra insn for a constant - loaded from memory. - - This is used by expand_binop to decide whether to force a constant - into a register. If the cost is greater than 2 and the constant - is used within a short loop, it gets forced into a register. - Ideally, there should be some weighting as to how mnay times it is used - within the loop. */ - -#define SHIFT_CODE_P(C) ((C) == ASHIFT || (C) == ASHIFTRT || (C) == LSHIFTRT) - -#define LOGICAL_CODE_P(C) ((C) == NOT || (C) == AND \ - || (C) == IOR || (C) == XOR) - -#define NON_COMMUTATIVE_CODE_P ((C) == MINUS || (C) == COMPARE) - -#define CONST_COSTS(RTX,CODE,OUTER_CODE) \ - case CONST_INT: \ - if (c4x_J_constant (RTX)) \ - return 0; \ - if (! TARGET_C3X \ - && OUTER_CODE == AND \ - && GET_CODE (RTX) == CONST_INT \ - && (INTVAL (RTX) == 255 || INTVAL (RTX) == 65535)) \ - return 0; \ - if (! TARGET_C3X \ - && (OUTER_CODE == ASHIFTRT || OUTER_CODE == LSHIFTRT) \ - && GET_CODE (RTX) == CONST_INT \ - && (INTVAL (RTX) == 16 || INTVAL (RTX) == 24)) \ - return 0; \ - if (TARGET_C3X && SHIFT_CODE_P (OUTER_CODE)) \ - return 3; \ - if (LOGICAL_CODE_P (OUTER_CODE) \ - ? c4x_L_constant (RTX) : c4x_I_constant (RTX)) \ - return 2; \ - case CONST: \ - case LABEL_REF: \ - case SYMBOL_REF: \ - return 4; \ - case CONST_DOUBLE: \ - if (c4x_H_constant (RTX)) \ - return 2; \ - if (GET_MODE (RTX) == QFmode) \ - return 4; \ - else \ - return 8; - /* Compute the cost of an address. This is meant to approximate the size - and/or execution delay of an insn using that address. If the cost is - approximated by the RTL complexity, including CONST_COSTS above, as - is usually the case for CISC machines, this macro should not be defined. - For aggressively RISCy machines, only one insn format is allowed, so - this macro should be a constant. The value of this macro only matters - for valid addresses. We handle the most common address without - a call to c4x_address_cost. */ + and/or execution delay of an insn using that address. The value of this + macro only matters for valid addresses. We handle the most common address + without a call to c4x_address_cost. */ #define ADDRESS_COST(ADDR) (REG_P (ADDR) ? 1 : c4x_address_cost (ADDR)) |