Date: Fri, 3 Jul 92 13:54:45 JST
From: na70103 AT mips DOT cc DOT mie-u DOT ac DOT jp (Makoto Kobayashi)
To: dj AT ctron DOT com
Cc: FESTEVES AT ptearn DOT ctron DOT com, djgpp AT sun DOT soe DOT clarkson DOT edu
Subject: Re: shifting long long ints creates bad assembler


   >>the code.  Hopefully gcc 2.2.2 (which I'm working on compiling now)
   >>will work correctly.
   >>
   >>DJ

   Yes, I have compiled gcc-2.2.2 and it works correctly for long long shift.
i386.md in gcc-2.1 had some problems but almost all are fixed in
gcc-2.2.


The assembly output from gcc-2.2.2 is shown below.

        .file        "tbug.c"
gcc2_compiled.:
.text
LC0:
        .ascii "%lf\0"
LC1:
        .ascii "%f/n\0"
        .align 2
.globl _main
_main:
        pushl %ebp
        movl %esp,%ebp
        subl $8,%esp
        pushl %esi
        pushl %ebx
        call ___main
        movl $1,%ebx
        movl $0,%esi
        leal -8(%ebp),%eax
        pushl %eax
        pushl $LC0
        call _scanf
        addl $8,%esp
        movl %ebx,%eax
        movl %esi,%edx
        movl %eax,%edx
        xorl %eax,%eax
        sall $3,%edx
        pushl %edx
        pushl %eax
        fildq (%esp)
        addl $8,%esp
        fdivrl -8(%ebp)
        fstl -8(%ebp)
        subl $8,%esp
        fstpl (%esp)
        pushl $LC1
        call _printf
        leal -16(%ebp),%esp
        popl %ebx
        popl %esi
        leave
        ret


                     Faculty of Eng., Mi'e Univ., Tsu, Japan.
                     na70103 AT mips DOT cc DOT mie-u DOT ac DOT jp    Makoto Kobayashi