[Bug target/126933] FAIL: gcc.target/i386/truncsfbf-2.c execution test

"hjl.tools at gmail dot com via Gcc-bugs" <[email protected]> Wed, 19 Aug 2026 00:24:47 +0000

Newsgroups	gmane.comp.gcc.bugs
Message-ID	<[email protected]/bugzilla/>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126933

H.J. Lu <hjl.tools at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |liuhongt at gcc dot gnu.org
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2026-08-19
     Ever confirmed|0                           |1

--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> ---
Clang generates:

Dump of assembler code for function foo:
   0x0000000000401160 <+0>:     push   %rbp
   0x0000000000401161 <+1>:     mov    %rsp,%rbp
   0x0000000000401164 <+4>:     sub    $0x10,%rsp
   0x0000000000401168 <+8>:     movss  %xmm0,-0x4(%rbp)
   0x000000000040116d <+13>:    movss  -0x4(%rbp),%xmm0
   0x0000000000401172 <+18>:    call   0x401310 <__truncsfbf2>
   0x0000000000401177 <+23>:    add    $0x10,%rsp
   0x000000000040117b <+27>:    pop    %rbp
   0x000000000040117c <+28>:    ret
End of assembler dump.

which returns 1.001e-08.  The GCC inlined SSE2 emulation should
be improved.