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Diffstat (limited to 'gcc/rtl.def')
| -rw-r--r-- | gcc/rtl.def | 41 |
1 files changed, 0 insertions, 41 deletions
diff --git a/gcc/rtl.def b/gcc/rtl.def index 50d947d80dd..fd23963597c 100644 --- a/gcc/rtl.def +++ b/gcc/rtl.def @@ -281,47 +281,6 @@ DEF_RTL_EXPR(DEFINE_EXPAND, "define_expand", "sEss", RTX_EXTRA) requirements for delay slots. */ DEF_RTL_EXPR(DEFINE_DELAY, "define_delay", "eE", RTX_EXTRA) -/* Define a set of insns that requires a function unit. This means that - these insns produce their result after a delay and that there may be - restrictions on the number of insns of this type that can be scheduled - simultaneously. - - More than one DEFINE_FUNCTION_UNIT can be specified for a function unit. - Each gives a set of operations and associated delays. The first three - operands must be the same for each operation for the same function unit. - - All delays are specified in cycles. - - 1st operand: Name of function unit (mostly for documentation) - 2nd operand: Number of identical function units in CPU - 3rd operand: Total number of simultaneous insns that can execute on this - function unit; 0 if unlimited. - 4th operand: Condition involving insn attribute, that, if true, specifies - those insns that this expression applies to. - 5th operand: Constant delay after which insn result will be - available. - 6th operand: Delay until next insn can be scheduled on the function unit - executing this operation. The meaning depends on whether or - not the next operand is supplied. - 7th operand: If this operand is not specified, the 6th operand gives the - number of cycles after the instruction matching the 4th - operand begins using the function unit until a subsequent - insn can begin. A value of zero should be used for a - unit with no issue constraints. If only one operation can - be executed a time and the unit is busy for the entire time, - the 3rd operand should be specified as 1, the 6th operand - should be specified as 0, and the 7th operand should not - be specified. - - If this operand is specified, it is a list of attribute - expressions. If an insn for which any of these expressions - is true is currently executing on the function unit, the - issue delay will be given by the 6th operand. Otherwise, - the insn can be immediately scheduled (subject to the limit - on the number of simultaneous operations executing on the - unit.) */ -DEF_RTL_EXPR(DEFINE_FUNCTION_UNIT, "define_function_unit", "siieiiV", RTX_EXTRA) - /* Define attribute computation for `asm' instructions. */ DEF_RTL_EXPR(DEFINE_ASM_ATTRIBUTES, "define_asm_attributes", "V", RTX_EXTRA) |