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From: "arnez at linux dot ibm.com" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug math/30130] New: [s390] The _FPU_SETCW macro yields compile
 error with Clang
Date: Thu, 16 Feb 2023 16:26:14 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D30130

            Bug ID: 30130
           Summary: [s390] The _FPU_SETCW macro yields compile error with
                    Clang
           Product: glibc
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: math
          Assignee: unassigned at sourceware dot org
          Reporter: arnez at linux dot ibm.com
  Target Milestone: ---

The _FPU_SETCW and _FPU_GETCW macros don't work with Clang.  Compiling this
sample program:

    #include <fpu_control.h>
    void foo() { _FPU_SETCW(0); }

gives

    foo.c:2:14: error: invalid operand for instruction
    void foo() { _FPU_SETCW(0); }
                 ^

This is because the inline assembly contains a spurious second operand whic=
h is
accepted by the GNU assembler, but not by Clang/LLVM.

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