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i386: Remove ndd support for *add<mode>_4 [PR113744]

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*add<mode>_4 and *adddi_4 are for shorter opcode from cmp to
inc/dec or add $128. But NDD code is longer than the cmp code,
so there is no need to support ndd.

gcc/ChangeLog:

	PR target/113744
	* config/i386/i386.md (*add<mode>_4): Remove ndd support.
	(*adddi_4): Ditto.

Co-Authored-By: Hu, Lin1 <lin1.hu@intel.com>
This commit is contained in:
Lingling Kong 2024-08-01 11:05:41 +08:00
parent edad1b0501
commit 25dba615e3
1 changed files with 15 additions and 25 deletions
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40
gcc/config/i386/i386.md
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@ -7146,35 +7146,31 @@
(define_insn "*adddi_4"
[(set (reg FLAGS_REG)
(compare
(match_operand:DI 1 "nonimmediate_operand" "0,rm")
(match_operand:DI 2 "x86_64_immediate_operand" "e,e")))
(clobber (match_scratch:DI 0 "=r,r"))]
(match_operand:DI 1 "nonimmediate_operand" "0")
(match_operand:DI 2 "x86_64_immediate_operand" "e")))
(clobber (match_scratch:DI 0 "=r"))]
"TARGET_64BIT
&& ix86_match_ccmode (insn, CCGCmode)"
{
bool use_ndd = get_attr_isa (insn) == ISA_APX_NDD;
switch (get_attr_type (insn))
{
case TYPE_INCDEC:
if (operands[2] == constm1_rtx)
return use_ndd ? "inc{q}\t{%1, %0|%0, %1}" : "inc{q}\t%0";
return "inc{q}\t%0";
else
{
gcc_assert (operands[2] == const1_rtx);
return use_ndd ? "dec{q}\t{%1, %0|%0, %1}" : "dec{q}\t%0";
return "dec{q}\t%0";
}
default:
if (x86_maybe_negate_const_int (&operands[2], DImode))
return use_ndd ? "add{q}\t{%2, %1, %0|%0, %1, %2}"
: "add{q}\t{%2, %0|%0, %2}";
return "add{q}\t{%2, %0|%0, %2}";
return use_ndd ? "sub{q}\t{%2, %1, %0|%0, %1, %2}"
: "sub{q}\t{%2, %0|%0, %2}";
return "sub{q}\t{%2, %0|%0, %2}";
}
}
[(set_attr "isa" "*,apx_ndd")
(set (attr "type")
[(set (attr "type")
(if_then_else (match_operand:DI 2 "incdec_operand")
(const_string "incdec")
(const_string "alu")))
@ -7195,36 +7191,30 @@
(define_insn "*add<mode>_4"
[(set (reg FLAGS_REG)
(compare
(match_operand:SWI124 1 "nonimmediate_operand" "0,rm")
(match_operand:SWI124 1 "nonimmediate_operand" "0")
(match_operand:SWI124 2 "const_int_operand")))
(clobber (match_scratch:SWI124 0 "=<r>,r"))]
(clobber (match_scratch:SWI124 0 "=<r>"))]
"ix86_match_ccmode (insn, CCGCmode)"
{
bool use_ndd = get_attr_isa (insn) == ISA_APX_NDD;
switch (get_attr_type (insn))
{
case TYPE_INCDEC:
if (operands[2] == constm1_rtx)
return use_ndd ? "inc{<imodesuffix>}\t{%1, %0|%0, %1}"
: "inc{<imodesuffix>}\t%0";
return "inc{<imodesuffix>}\t%0";
else
{
gcc_assert (operands[2] == const1_rtx);
return use_ndd ? "dec{<imodesuffix>}\t{%1, %0|%0, %1}"
: "dec{<imodesuffix>}\t%0";
return "dec{<imodesuffix>}\t%0";
}
default:
if (x86_maybe_negate_const_int (&operands[2], <MODE>mode))
return use_ndd ? "add{<imodesuffix>}\t{%2, %1, %0|%0, %1, %2}"
: "add{<imodesuffix>}\t{%2, %0|%0, %2}";
return "add{<imodesuffix>}\t{%2, %0|%0, %2}";
return use_ndd ? "sub{<imodesuffix>}\t{%2, %1, %0|%0, %1, %2}"
: "sub{<imodesuffix>}\t{%2, %0|%0, %2}";
return "sub{<imodesuffix>}\t{%2, %0|%0, %2}";
}
}
[(set_attr "isa" "*,apx_ndd")
(set (attr "type")
[(set (attr "type")
(if_then_else (match_operand:<MODE> 2 "incdec_operand")
(const_string "incdec")
(const_string "alu")))