https://gcc.gnu.org/g:25dba615e3c191f0a7264538b6d260e91ca2624a
commit r15-2471-g25dba615e3c191f0a7264538b6d260e91ca2624a
Author: Lingling Kong <lingling.k...@intel.com>
Date: Thu Aug 1 11:05:41 2024 +0800
i386: Remove ndd support for *add<mode>_4 [PR113744]
*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...@intel.com>
Diff:
---
gcc/config/i386/i386.md | 40 +++++++++++++++-------------------------
1 file changed, 15 insertions(+), 25 deletions(-)
diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md
index fb10fdc9f96d..3c293c146569 100644
--- a/gcc/config/i386/i386.md
+++ b/gcc/config/i386/i386.md
@@ -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")))
