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From: Preben Randhol <randhol+abuse@pvv.org>
Newsgroups: comp.lang.ada
Subject: Re: What is faster Ada or C?
Date: Mon, 3 Dec 2001 21:20:39 +0000 (UTC)
Organization: Norwegian university of science and technology
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Date: 2001-12-03T21:20:39+00:00
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On Mon, 3 Dec 2001 21:17:22 +0000 (UTC), Preben Randhol wrote:
> On Mon, 3 Dec 2001 20:56:12 +0000 (UTC), Georg Bauhaus wrote:
>> 
>> Here is side by side output:
>> 
>>         .file   "silly.adb"             .file   "silly.c"
>> gcc2_compiled.:                    gcc2_compiled.:
>> ___gnu_compiled_ada:               ___gnu_compiled_c:
>> .text                              .text
>>         .align 4                        .align 4
>> .globl __ada_silly                 .globl _silly
>> __ada_silly:                       _silly:
>>         pushl %ebp                      pushl %ebp
>>         movl %esp,%ebp                  movl %esp,%ebp
>>         subl $8,%esp                    subl $8,%esp
>>         movl $0,-4(%ebp)                movl $0,-4(%ebp)
>>         movl $1,-8(%ebp)                movl $1,-8(%ebp)
>> L2:                                L2:
>>         cmpl $1000,-8(%ebp)             cmpl $1000,-8(%ebp)
>>         jle L5                          jle L5
>>         jmp L3                          jmp L3
>>         .align 2,0x90                   .align 2,0x90
>> L5:                                L5:
>>         incl -4(%ebp)                   incl -4(%ebp)
>>         jmp L4                     
>>         .align 2,0x90              
>>         jmp L3                     
>>         .align 2,0x90              
>> L6:                                
> 
> What happens here? I'm not fluent in assembly any more. Why is there a
> jmp L4 etc in the Ada code and not in the C. Is it range checks ?

oops I see I missed the point that the ada source was compiled with -gnatp.


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