Displaying 11 results from an estimated 11 matches for "fldt".
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2011 Aug 31
1
[LLVMdev] FP Stack overflow with inline asm
...e of our projects to LLVM we discovered some strange behavior. We tracked the issue down to the following test case:
int main()
{
double v = 0.84711;
int r;
__asm__("fistl %0": "=m"(r) : "t"(v));
return r;
}
The (relevant) clang generated asm looks like this:
fldt 0.84711
## InlineAsm Start
fistl -4(%ebp)
## InlineAsm End
The compiler is loading the constant into the top fpu stack register (as requested by "t" constraint) and then is executing the asm statement. The asm statement doesn't pop the value from the fp stack. Running this statement...
2013 Oct 19
2
[LLVMdev] Feature request for include llvm-mc in llvm.org/builds
...o compile to following asm file for both linux/gcc and
windows/visual C++.
.global sqrt
.type sqrt, at function
sqrt: fldl 4(%esp)
fsqrt
fstsw %ax
sub $12,%esp
fld %st(0)
fstpt (%esp)
mov (%esp),%ecx
and $0x7ff,%ecx
cmp $0x400,%ecx
jnz 1f
and $0x200,%eax
sub $0x100,%eax
sub %eax,(%esp)
fstp %st(0)
fldt (%esp)
1: add $12,%esp
fstpl 4(%esp)
fldl 4(%esp)
ret
>
> Cheers,
> Rafael
--
此致
礼
罗勇刚
Yours
sincerely,
Yonggang Luo
2013 Oct 21
0
[LLVMdev] Feature request for include llvm-mc in llvm.org/builds
...bal sqrt
> .type sqrt, at function
> sqrt: fldl 4(%esp)
> fsqrt
> fstsw %ax
> sub $12,%esp
> fld %st(0)
> fstpt (%esp)
> mov (%esp),%ecx
> and $0x7ff,%ecx
> cmp $0x400,%ecx
> jnz 1f
> and $0x200,%eax
> sub $0x100,%eax
> sub %eax,(%esp)
> fstp %st(0)
> fldt (%esp)
> 1: add $12,%esp
> fstpl 4(%esp)
> fldl 4(%esp)
> ret
>
> >
> > Cheers,
> > Rafael
>
>
>
> --
> 此致
> 礼
> 罗勇刚
> Yours
> sincerely,
> Yonggang Luo
>
> _______________________________________________
> LLVM De...
2013 Oct 19
0
[LLVMdev] Feature request for include llvm-mc in llvm.org/builds
On 19 October 2013 06:01, 罗勇刚(Yonggang Luo) <luoyonggang at gmail.com> wrote:
> I found that access llvm-mc from clang driver is impossible, and I
> want to use llvm-mc to compile assembly files, how to do that?
Try "clang -integrated-as -c test.s"
Cheers,
Rafael
2013 Oct 21
1
[LLVMdev] Feature request for include llvm-mc in llvm.org/builds
...%esp)
>> fsqrt
>> fstsw %ax
>> sub $12,%esp
>> fld %st(0)
>> fstpt (%esp)
>> mov (%esp),%ecx
>> and $0x7ff,%ecx
>> cmp $0x400,%ecx
>> jnz 1f
>> and $0x200,%eax
>> sub $0x100,%eax
>> sub %eax,(%esp)
>> fstp %st(0)
>> fldt (%esp)
>> 1: add $12,%esp
>> fstpl 4(%esp)
>> fldl 4(%esp)
>> ret
>>
>> >
>> > Cheers,
>> > Rafael
>>
>>
>>
>> --
>> 此致
>> 礼
>> 罗勇刚
>> Yours
>> sincerely,
>> Yonggang Lu...
2013 Oct 22
2
[LLVMdev] How to use clang -intergrated-as to compile cross-(os/target) assembly file.
...qrt: fldl 4(%esp)
fsqrt
fstsw %ax
sub $12,%esp
fld %st(0)
fstpt (%esp)
mov (%esp),%ecx
and $0x7ff,%ecx
cmp $0x400,%ecx
jnz 1f
and $0x200,%eax
sub $0x100,%eax
sub %eax,(%esp)
fstp %st(0)
fldt (%esp)
1: add $12,%esp
fstpl 4(%esp)
fldl 4(%esp)
ret
H:\CI\bld\compilers\musl\src\math\i386>type sqrt.c
float __cdecl sqrt(float z)
{
return 0.0;
}
H:\CI\bld\compilers\musl\src\math\i386>clang -integrated-as -c -v
--target=i686
-pc-win32 sqrt.s
clang versio...
2013 Oct 19
2
[LLVMdev] Feature request for include llvm-mc in llvm.org/builds
I found that access llvm-mc from clang driver is impossible, and I
want to use llvm-mc to compile assembly files, how to do that?
H:\CI\bld\compilers\musl\src\math\i386>clang -c -v --target=i686-pc-mingw sqrt.s
clang version 3.4 (trunk)
Target: i686-pc-mingw
Thread model: posix
Selected GCC installation:
"gcc" -v -c -m32 -o sqrt.o -x assembler sqrt.s
clang.exe: error: unable to
2013 Oct 22
0
[LLVMdev] How to use clang -intergrated-as to compile cross-(os/target) assembly file.
...sub $12,%esp
> fld %st(0)
> fstpt (%esp)
> mov (%esp),%ecx
> and $0x7ff,%ecx
> cmp $0x400,%ecx
> jnz 1f
> and $0x200,%eax
> sub $0x100,%eax
> sub %eax,(%esp)
> fstp %st(0)
> fldt (%esp)
> 1: add $12,%esp
> fstpl 4(%esp)
> fldl 4(%esp)
> ret
>
> H:\CI\bld\compilers\musl\src\math\i386>type sqrt.c
> float __cdecl sqrt(float z)
> {
> return 0.0;
> }
> H:\CI\bld\compilers\musl\src\math\i386>clang -integrate...
2013 Oct 23
2
[LLVMdev] How to use clang -intergrated-as to compile cross-(os/target) assembly file.
...)
>> fstpt (%esp)
>> mov (%esp),%ecx
>> and $0x7ff,%ecx
>> cmp $0x400,%ecx
>> jnz 1f
>> and $0x200,%eax
>> sub $0x100,%eax
>> sub %eax,(%esp)
>> fstp %st(0)
>> fldt (%esp)
>> 1: add $12,%esp
>> fstpl 4(%esp)
>> fldl 4(%esp)
>> ret
>>
>> H:\CI\bld\compilers\musl\src\math\i386>type sqrt.c
>> float __cdecl sqrt(float z)
>> {
>> return 0.0;
>> }
>> H:\CI\bld\compi...
2013 Oct 21
0
[LLVMdev] LLVMdev Digest, Vol 112, Issue 56
...bal sqrt
> .type sqrt, at function
> sqrt: fldl 4(%esp)
> fsqrt
> fstsw %ax
> sub $12,%esp
> fld %st(0)
> fstpt (%esp)
> mov (%esp),%ecx
> and $0x7ff,%ecx
> cmp $0x400,%ecx
> jnz 1f
> and $0x200,%eax
> sub $0x100,%eax
> sub %eax,(%esp)
> fstp %st(0)
> fldt (%esp)
> 1: add $12,%esp
> fstpl 4(%esp)
> fldl 4(%esp)
> ret
>
> >
> > Cheers,
> > Rafael
>
>
>
> --
> ??
> ?
> ???
> Yours
> sincerely,
> Yonggang Luo
>
> _______________________________________________
> LLVM De...
2013 Oct 22
0
[LLVMdev] LLVMdev Digest, Vol 112, Issue 59
...%ax
> sub $12,%esp
> fld %st(0)
> fstpt (%esp)
> mov (%esp),%ecx
> and $0x7ff,%ecx
> cmp $0x400,%ecx
> jnz 1f
> and $0x200,%eax
> sub $0x100,%eax
> sub %eax,(%esp)
> fstp %st(0)
> fldt (%esp)
> 1: add $12,%esp
> fstpl 4(%esp)
> fldl 4(%esp)
> ret
>
> H:\CI\bld\compilers\musl\src\math\i386>type sqrt.c
> float __cdecl sqrt(float z)
> {
> return 0.0;
> }
> H:\CI\bld\compilers\musl\src\math\i386>clang -integrated-a...