armv7 cpu 编译错误

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使用./android_build.sh -m armeabi-v7a 命令编译，报错如下：

/workspace/mperf/apps/cpu_pmu_analysis/prefetch.cpp:27:13: error: invalid operand in inline asm: 'prfm pldl1keep, [$0, #64]3:ldr d2, [$0]fmla v3.4s, v2.4s, v1.s[0]add $0, $0, #64prfm pldl1keep, [$0, #64]subs ${1:w}, ${1:w}, #1bne 3b'
"prfm pldl1keep, [%[b_ptr], #64]\n"
^
/workspace/mperf/apps/cpu_pmu_analysis/prefetch.cpp:27:13: error: invalid operand in inline asm: 'prfm pldl1keep, [$0, #64]3:ldr d2, [$0]fmla v3.4s, v2.4s, v1.s[0]add $0, $0, #64prfm pldl1keep, [$0, #64]subs ${1:w}, ${1:w}, #1bne 3b'
/workspace/mperf/apps/cpu_pmu_analysis/prefetch.cpp:27:13: error: invalid instruction
:1:2: note: instantiated into assembly here
prfm pldl1keep, [r0, #64]
^~~~
/workspace/mperf/apps/cpu_pmu_analysis/prefetch.cpp:29:14: error: operand must be a register in range [r0, r15]
"ldr d2, [%[b_ptr]]\n"
^
:3:5: note: instantiated into assembly here
ldr d2, [r0]
^
/workspace/mperf/apps/cpu_pmu_analysis/prefetch.cpp:30:14: error: unexpected token in argument list
"fmla v3.4s, v2.4s, v1.s[0]\n"
^
:4:24: note: instantiated into assembly here
fmla v3.4s, v2.4s, v1.s[0]
^
/workspace/mperf/apps/cpu_pmu_analysis/prefetch.cpp:32:14: error: invalid instruction
"prfm pldl1keep, [%[b_ptr], #64]\n"
^
:6:1: note: instantiated into assembly here
prfm pldl1keep, [r0, #64]
^~~~
/workspace/mperf/apps/cpu_pmu_analysis/prefetch.cpp:33:14: error: unexpected token in operand
"subs %w[K], %w[K], #1\n"
^
:7:6: note: instantiated into assembly here
subs , , #1
^
/workspace/mperf/apps/cpu_pmu_analysis/prefetch.cpp:41:13: error: invalid operand in inline asm: 'prfm pldl1keep, [$0, #512]3:ldr d2, [$0]fmla v3.4s, v2.4s, v1.s[0]add $0, $0, #64prfm pldl1keep, [$0, #512]subs ${1:w}, ${1:w}, #1bne 3b'
"prfm pldl1keep, [%[b_ptr], #512]\n"
^
/workspace/mperf/apps/cpu_pmu_analysis/prefetch.cpp:41:13: error: invalid operand in inline asm: 'prfm pldl1keep, [$0, #512]3:ldr d2, [$0]fmla v3.4s, v2.4s, v1.s[0]add $0, $0, #64prfm pldl1keep, [$0, #512]subs ${1:w}, ${1:w}, #1bne 3b'
/workspace/mperf/apps/cpu_pmu_analysis/prefetch.cpp:41:13: error: invalid instruction
:1:2: note: instantiated into assembly here
prfm pldl1keep, [r0, #512]
^~~~
/workspace/mperf/apps/cpu_pmu_analysis/prefetch.cpp:43:14: error: operand must be a register in range [r0, r15]
"ldr d2, [%[b_ptr]]\n"
^
:3:5: note: instantiated into assembly here
ldr d2, [r0]
^
/workspace/mperf/apps/cpu_pmu_analysis/prefetch.cpp:44:14: error: unexpected token in argument list
"fmla v3.4s, v2.4s, v1.s[0]\n"
^
:4:24: note: instantiated into assembly here
fmla v3.4s, v2.4s, v1.s[0]
^
/workspace/mperf/apps/cpu_pmu_analysis/prefetch.cpp:46:14: error: invalid instruction
"prfm pldl1keep, [%[b_ptr], #512]\n"
^
:6:1: note: instantiated into assembly here
prfm pldl1keep, [r0, #512]
^~~~
/workspace/mperf/apps/cpu_pmu_analysis/prefetch.cpp:47:14: error: unexpected token in operand
"subs %w[K], %w[K], #1\n"
^
:7:6: note: instantiated into assembly here
subs , , #1
^
/workspace/mperf/apps/cpu_pmu_analysis/prefetch.cpp:63:13: error: register expected
"ld1 {v1.4s}, [%[a_ptr]]\n"
^
:1:7: note: instantiated into assembly here
ld1 {v1.4s}, [r0]
^
/workspace/mperf/apps/cpu_pmu_analysis/prefetch.cpp:64:14: error: register expected
"ld1 {v2.4s}, [%[a_ptr]]\n"
^
:2:6: note: instantiated into assembly here
ld1 {v2.4s}, [r0]
^
/workspace/mperf/apps/cpu_pmu_analysis/prefetch.cpp:65:14: error: register expected
"ld1 {v3.4s}, [%[a_ptr]]\n"
^
:3:6: note: instantiated into assembly here
ld1 {v3.4s}, [r0]
^
/workspace/mperf/apps/cpu_pmu_analysis/prefetch.cpp:41:13: error: invalid operand in inline asm: 'prfm pldl1keep, [$0, #512]3:ldr d2, [$0]fmla v3.4s, v2.4s, v1.s[0]add $0, $0, #64prfm pldl1keep, [$0, #512]subs ${1:w}, ${1:w}, #1bne 3b'
"prfm pldl1keep, [%[b_ptr], #512]\n"
^
/workspace/mperf/apps/cpu_pmu_analysis/prefetch.cpp:41:13: error: invalid operand in inline asm: 'prfm pldl1keep, [$0, #512]3:ldr d2, [$0]fmla v3.4s, v2.4s, v1.s[0]add $0, $0, #64prfm pldl1keep, [$0, #512]subs ${1:w}, ${1:w}, #1bne 3b'
fatal error: too many errors emitted, stopping now [-ferror-limit=]

Start with apps/cpu_pmu_analysis/prefetch.cpp, especially the inline assembly around lines 27-65, and reproduce the failure with ./android_build.sh -m armeabi-v7a. Compare the ARMv7 assembler diagnostics with the instructions and operands used there. Done means the armeabi-v7a build completes without these errors.

Written by the indexing model from the issue text.