https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99646
Bug ID: 99646
Summary: s111 benchmark of TSVC preffers -mprefer-avx128 on
zen3
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: hubicka at gcc dot gnu.org
Target Milestone: ---
typedef float real_t;
#define iterations 100000
#define LEN_1D 32000
#define LEN_2D 256
real_t a[LEN_1D],b[LEN_1D],aa[LEN_2D][LEN_2D];
void main()
{
// linear dependence testing
// no dependence - vectorizable
for (int nl = 0; nl < 2*iterations; nl++) {
for (int i = 1; i < LEN_1D; i += 2) {
a[i] = a[i - 1] + b[i];
}
dummy();
}
}
takes 0.73s with -march=native -Ofast -mprefer-avx128 and 0.81s with
-march=native -Ofast
128bit version is:
main:
.LFB0:
.cfi_startproc
pushq %rbx
.cfi_def_cfa_offset 16
.cfi_offset 3, -16
movl $200000, %ebx
.L2:
xorl %eax, %eax
.p2align 4
.p2align 3
.L4:
vmovaps a(%rax), %xmm2
vmovups b+4(%rax), %xmm3
addq $32, %rax
vshufps $136, a-16(%rax), %xmm2, %xmm0
vshufps $136, b-12(%rax), %xmm3, %xmm1
vaddps %xmm1, %xmm0, %xmm0
vmovss %xmm0, a-28(%rax)
vextractps $1, %xmm0, a-20(%rax)
vextractps $2, %xmm0, a-12(%rax)
vextractps $3, %xmm0, a-4(%rax)
cmpq $127968, %rax
jne .L4
vmovss b+127972(%rip), %xmm0
xorl %eax, %eax
vaddss a+127968(%rip), %xmm0, %xmm0
vmovss %xmm0, a+127972(%rip)
vmovss a+127976(%rip), %xmm0
vaddss b+127980(%rip), %xmm0, %xmm0
vmovss %xmm0, a+127980(%rip)
vmovss a+127984(%rip), %xmm0
vaddss b+127988(%rip), %xmm0, %xmm0
vmovss %xmm0, a+127988(%rip)
vmovss a+127992(%rip), %xmm0
vaddss b+127996(%rip), %xmm0, %xmm0
vmovss %xmm0, a+127996(%rip)
call dummy
main:
.LFB0:
.cfi_startproc
pushq %rbp
.cfi_def_cfa_offset 16
.cfi_offset 6, -16
movq %rsp, %rbp
.cfi_def_cfa_register 6
pushq %rbx
.cfi_offset 3, -24
movl $200000, %ebx
andq $-32, %rsp
.p2align 4
.p2align 3
.L2:
xorl %eax, %eax
.p2align 4
.p2align 3
.L4:
vmovaps a(%rax), %ymm4
vmovups b+4(%rax), %ymm5
addq $64, %rax
vshufps $136, a-32(%rax), %ymm4, %ymm1
vperm2f128 $3, %ymm1, %ymm1, %ymm2
vshufps $68, %ymm2, %ymm1, %ymm0
vshufps $238, %ymm2, %ymm1, %ymm2
vshufps $136, b-28(%rax), %ymm5, %ymm1
vinsertf128 $1, %xmm2, %ymm0, %ymm0
vperm2f128 $3, %ymm1, %ymm1, %ymm2
vshufps $68, %ymm2, %ymm1, %ymm3
vshufps $238, %ymm2, %ymm1, %ymm2
vinsertf128 $1, %xmm2, %ymm3, %ymm1
vaddps %ymm1, %ymm0, %ymm0
vmovss %xmm0, a-60(%rax)
vextractps $1, %xmm0, a-52(%rax)
vextractps $2, %xmm0, a-44(%rax)
vextractps $3, %xmm0, a-36(%rax)
vextractf128 $0x1, %ymm0, %xmm0
vmovss %xmm0, a-28(%rax)
vextractps $1, %xmm0, a-20(%rax)
vextractps $2, %xmm0, a-12(%rax)
vextractps $3, %xmm0, a-4(%rax)
cmpq $127936, %rax
jne .L4
vmovaps a+127936(%rip), %xmm6
vmovups b+127940(%rip), %xmm7
xorl %eax, %eax
vshufps $136, a+127952(%rip), %xmm6, %xmm0
vshufps $136, b+127956(%rip), %xmm7, %xmm1
vaddps %xmm1, %xmm0, %xmm0
vmovss %xmm0, a+127940(%rip)
vextractps $1, %xmm0, a+127948(%rip)
vextractps $2, %xmm0, a+127956(%rip)
vextractps $3, %xmm0, a+127964(%rip)
vmovss b+127972(%rip), %xmm0
vaddss a+127968(%rip), %xmm0, %xmm0
vmovss %xmm0, a+127972(%rip)
vmovss b+127980(%rip), %xmm0
vaddss a+127976(%rip), %xmm0, %xmm0
vmovss %xmm0, a+127980(%rip)
vmovss b+127988(%rip), %xmm0
vaddss a+127984(%rip), %xmm0, %xmm0
vmovss %xmm0, a+127988(%rip)
vmovss a+127992(%rip), %xmm0
vaddss b+127996(%rip), %xmm0, %xmm0
vmovss %xmm0, a+127996(%rip)
vzeroupper
call dummy
