鲲鹏920上使用neon intrinsics接口的问题
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鲲鹏920上使用neon intrinsics接口的问题
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发表于2023-03-09 14:48:21
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请教一下,我在一台鲲鹏920的主机上编译了AvxToNeon(https://github.com/kunpengcompute/AvxToNeon)自带的tests程序。

但是反汇编test程序却没有找到neon intrinsics接口的汇编指令,如VLD, VADD, VMUL等。是什么原因呢?

另外,为什么鲲鹏920上没看到neon或vfp的feature呢??是需要设置什么开关么?谢谢

[root@my-srv tests]# lscpu 
Architecture:                    aarch64
CPU op-mode(s):                  64-bit
Byte Order:                      Little Endian
CPU(s):                          16
On-line CPU(s) list:             0-15
Thread(s) per core:              1
Core(s) per socket:              8
Socket(s):                       2
NUMA node(s):                    2
Vendor ID:                       HiSilicon
Model:                           0
Model name:                      Kunpeng-920
Stepping:                        0x1
CPU max MHz:                     2400.0000
CPU min MHz:                     2400.0000
BogoMIPS:                        200.00
L1d cache:                       1 MiB
L1i cache:                       1 MiB
L2 cache:                        8 MiB
L3 cache:                        64 MiB
NUMA node0 CPU(s):               0-7
NUMA node1 CPU(s):               8-15
Vulnerability Itlb multihit:     Not affected
Vulnerability L1tf:              Not affected
Vulnerability Mds:               Not affected
Vulnerability Meltdown:          Not affected
Vulnerability Spec store bypass: Vulnerable
Vulnerability Spectre v1:        Mitigation; __user pointer sanitization
Vulnerability Spectre v2:        Not affected
Vulnerability Tsx async abort:   Not affected
Flags:                           fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm jscvt fcma dcpop asimddp asimdfhm
[root@my-srv tests]# head /proc/cpuinfo 
processor	: 0
BogoMIPS	: 200.00
Features	: fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm jscvt fcma dcpop asimddp asimdfhm
CPU implementer	: 0x48
CPU architecture: 8
CPU variant	: 0x1
CPU part	: 0xd01
CPU revision	: 0

processor	: 1

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