Yes! That's the code I like.
On Feb 10, 2007, at 17:46 , Felipe Almeida Lessa wrote:
On 2/10/07, Rafael Almeida <[EMAIL PROTECTED]> wrote:
While the haskell program took so long, the C program went really
faster
than the haskell version:
$ gcc -O3 -ffast-math -mfpmath=sse -msse2 -std=c99 loop.c -o c_loop
$ time ./c_loop
3.333333
real 0m0.001s
user 0m0.000s
sys 0m0.000s
$ gcc --version
gcc (GCC) 4.1.2 20061115 (prerelease) (Debian 4.1.1-21)
Under gcc (GCC) 4.1.2 20060928 (prerelease) (Ubuntu 4.1.1-13ubuntu5),
the following asm code is generated for part of the main function:
mov dword ptr [esp+4], 0aaaaaaabh
mov dword ptr [esp+8], 400aaaaah
mov dword ptr [esp], data_804858c
call wrapper_8049688_80482b4
where data_804858c is "%f\n" and wrapper_8049688_80482b4 is printf.
Needless to say that the other argument is exactly the double
3.3333333333333335. In the OP's words, "newer gcc's will statically
compute that loop".
--
Felipe.
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