https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89457
Bug ID: 89457
Summary: -madx doesn't generate ADX instructions
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: hjl.tools at gmail dot com
Target Milestone: ---
[hjl@gnu-4 pr89456]$ cat y.i
unsigned char
foo (unsigned char __CF, unsigned int __X,
unsigned int __Y, unsigned int *__P)
{
return __builtin_ia32_addcarryx_u32 (__CF, __X, __Y, __P);
}
[hjl@gnu-4 pr89456]$ gcc -S -O2 -madx y.i
[hjl@gnu-4 pr89456]$ cat y.s
.file "y.i"
.text
.p2align 4,,15
.globl foo
.type foo, @function
foo:
.LFB0:
.cfi_startproc
movzbl %dil, %edi
movl %edi, %eax
addb $-1, %al
adcl %edx, %esi
setc %al
movl %esi, (%rcx)
ret
.cfi_endproc
.LFE0:
.size foo, .-foo
.ident "GCC: (GNU) 8.2.1 20190215 (Red Hat 8.2.1-9)"
.section .note.GNU-stack,"",@progbits
[hjl@gnu-4 pr89456]$
I am expecting:
addb $-1, %dil
adcxl %edx, %esi
movl %esi, (%rcx)
setb %al
retq
