[llvm-bugs] [Bug 38221] New: error: unknown instruction for inline asm "cvt.s.pl %0, %4\n\t"
via llvm-bugs
llvm-bugs at lists.llvm.org
Thu Jul 19 05:14:59 PDT 2018
https://bugs.llvm.org/show_bug.cgi?id=38221
Bug ID: 38221
Summary: error: unknown instruction for inline asm "cvt.s.pl
%0, %4\n\t"
Product: clang
Version: trunk
Hardware: Other
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: -New Bugs
Assignee: unassignedclangbugs at nondot.org
Reporter: lesliezhai at llvm.org.cn
CC: llvm-bugs at lists.llvm.org
Hi LLVM developers,
I am building OpenJDK8[1] with LLVM toolchain[2] for mips64el, it[3] failed
to build:
/home/loongson/jdk8-mips/hotspot/src/os_cpu/linux_mips/vm/os_linux_mips.cpp:429:13:
error: unknown instruction
"cvt.s.pl %0, %4\n\t"
^
<inline asm>:1:2: note: instantiated into assembly here
cvt.s.pl $f0, $f0
^
/home/loongson/jdk8-mips/hotspot/src/os_cpu/linux_mips/vm/os_linux_mips.cpp:429:31:
error: unknown instruction
"cvt.s.pl %0, %4\n\t"
^
<inline asm>:2:2: note: instantiated into assembly here
cvt.s.pu $f1, $f0
^
/home/loongson/jdk8-mips/hotspot/src/os_cpu/linux_mips/vm/os_linux_mips.cpp:430:31:
error: unknown instruction
"cvt.s.pu %1, %4\n\t"
^
<inline asm>:3:2: note: instantiated into assembly here
cvt.s.pl $f2, $f1
^
/home/loongson/jdk8-mips/hotspot/src/os_cpu/linux_mips/vm/os_linux_mips.cpp:431:31:
error: unknown instruction
"cvt.s.pl %2, %5\n\t"
^
<inline asm>:4:2: note: instantiated into assembly here
cvt.s.pu $f3, $f1
^
/home/loongson/jdk8-mips/hotspot/src/os_cpu/linux_mips/vm/os_linux_mips.cpp:441:37:
error: unknown instruction
"add.s %2, %4, %6\n\t"
^
<inline asm>:3:2: note: instantiated into assembly here
pll.ps $f0, $f1, $f2
^
/home/loongson/jdk8-mips/hotspot/src/os_cpu/linux_mips/vm/os_linux_mips.cpp:491:17:
error: unknown instruction
"cvt.s.pu %3, %9\n\t"
^
<inline asm>:1:2: note: instantiated into assembly here
cvt.s.pu $f3, $f0
^
/home/loongson/jdk8-mips/hotspot/src/os_cpu/linux_mips/vm/os_linux_mips.cpp:491:35:
error: unknown instruction
"cvt.s.pu %3, %9\n\t"
^
<inline asm>:2:2: note: instantiated into assembly here
cvt.s.pl $f4, $f0
^
/home/loongson/jdk8-mips/hotspot/src/os_cpu/linux_mips/vm/os_linux_mips.cpp:492:35:
error: unknown instruction
"cvt.s.pl %4, %9\n\t"
^
<inline asm>:3:2: note: instantiated into assembly here
cvt.s.pu $f5, $f1
^
/home/loongson/jdk8-mips/hotspot/src/os_cpu/linux_mips/vm/os_linux_mips.cpp:493:36:
error: unknown instruction
"cvt.s.pu %5, %10\n\t"
^
<inline asm>:4:2: note: instantiated into assembly here
cvt.s.pl $f6, $f1
^
/home/loongson/jdk8-mips/hotspot/src/os_cpu/linux_mips/vm/os_linux_mips.cpp:494:36:
error: unknown instruction
"cvt.s.pl %6, %10\n\t"
^
<inline asm>:5:2: note: instantiated into assembly here
cvt.s.pu $f7, $f2
^
/home/loongson/jdk8-mips/hotspot/src/os_cpu/linux_mips/vm/os_linux_mips.cpp:495:36:
error: unknown instruction
"cvt.s.pu %7, %11\n\t"
^
<inline asm>:6:2: note: instantiated into assembly here
cvt.s.pl $f8, $f2
^
/home/loongson/jdk8-mips/hotspot/src/os_cpu/linux_mips/vm/os_linux_mips.cpp:498:41:
error: unknown instruction
"madd.s %2, %4, %6, %8\n\t"
^
<inline asm>:9:2: note: instantiated into assembly here
pll.ps $f0, $f1, $f2
^
/home/loongson/jdk8-mips/hotspot/src/os_cpu/linux_mips/vm/os_linux_mips.cpp:464:37:
error: unknown instruction
"mul.s %2, %4, %6\n\t"
^
<inline asm>:3:2: note: instantiated into assembly here
pll.ps $f0, $f1, $f2
^
/home/loongson/jdk8-mips/hotspot/src/os_cpu/linux_mips/vm/os_linux_mips.cpp:453:37:
error: unknown instruction
"sub.s %2, %4, %6\n\t"
^
<inline asm>:3:2: note: instantiated into assembly here
pll.ps $f0, $f1, $f2
But reduced testcase1 is able to work:
$ cat t.s
cvt.s.pl $f0, $f1
$ clang -c t.s -o t.o
$ file t.o
t.o: ELF 64-bit LSB relocatable, MIPS, MIPS64 rel2 version 1 (SYSV), not
stripped
And reduced testcase2 is able to work too:
$ cat t.cpp
void t() {
float ft_upper = 6, ft_lower = 5, fs_upper = 4, fs_lower = 3;
double ft_value = 2, fs_value = 1;
__asm__ __volatile__ (
"cvt.s.pl %0, %4\n\t"
"cvt.s.pu %1, %4\n\t"
"cvt.s.pl %2, %5\n\t"
"cvt.s.pu %3, %5\n\t"
: "=f" (fs_lower), "=f" (fs_upper), "=f" (ft_lower), "=f" (ft_upper)
: "f" (fs_value), "f" (ft_value)
);
}
$ clang++ -c t.cpp -o t.o
$ file t.o
t.o: ELF 64-bit LSB relocatable, MIPS, MIPS64 rel2 version 1 (SYSV), not
stripped
1. http://hg.loongnix.org/
2. Loongson clang version 7.0.0 (git at github.com:Loong-Language/loong-clang.git
c36069cffc57a30a20782bf327a87bed4e48a6c2)
(git at github.com:Loong-Language/loong-llvm.git
59cb663e72874dda740aa2b18bf47ba65b32fe9b) (based on LLVM 7.0.0svn)
Target: mips64el-redhat-linux
Thread model: posix
InstalledDir: /opt/loong-llvm/bin
Found candidate GCC installation: /usr/lib/gcc/mips64el-redhat-linux/4.9.3
Selected GCC installation: /usr/lib/gcc/mips64el-redhat-linux/4.9.3
Candidate multilib: .;
Selected multilib: .;
3. inline asm is here
http://hg.loongnix.org/jdk8-mips64-public/hotspot/file/tip/src/os_cpu/linux_mips/vm/os_linux_mips.cpp#l432
4. Also experienced other bug
http://lists.llvm.org/pipermail/llvm-dev/2018-July/124717.html
Regards,
Leslie Zhai
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