headers
Daniel Dunbar | 19 Jul 2008 01:34
Gravatar

patch: more builtin support

This patch adds support for __builtin_{ffs[l][l], parity[l][l], popcount[l][l], huge_valf, huge_vall}.
 + test case

nans, powi[fl], prefetch still missing (among others, no doubt).

 - Daniel
// RUN: ccc %s && ./a.out > A
// RUN: gcc %s && ./a.out > B
// RUN: diff A B

#include <stdio.h>

void test(int M, long long N) {
  printf("%d %lld: %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d\n",
         M, N,
         __builtin_ffs(M), __builtin_ffsl(M), __builtin_ffsll(M),
         __builtin_parity(M), __builtin_parityl(M), __builtin_parityll(M),
         __builtin_popcount(M), __builtin_popcountl(M), __builtin_popcountll(M),
         __builtin_ffs(N), __builtin_ffsl(N), __builtin_ffsll(N),
         __builtin_parity(N), __builtin_parityl(N), __builtin_parityll(N),
         __builtin_popcount(N), __builtin_popcountl(N), __builtin_popcountll(N));
}

int main() {
  int i;

  test(-1,-1LL);
  test(0,0);
  test(1,1);
(Continue reading)

Permalink | Reply |
headers
Chris Lattner | 20 Jul 2008 02:23
Picon
Favicon

Re: patch: more builtin support


On Jul 18, 2008, at 4:34 PM, Daniel Dunbar wrote:

> This patch adds support for __builtin_{ffs[l][l], parity[l][l],  
> popcount[l][l], huge_valf, huge_vall}.
> + test case

Looks great to me with one minor change: we don't want the clang  
testsuite to actually execute code.  Please make the test just be  
something like this:

void test(int M, long long N) {
   printf("%d %lld: %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d  
%d\n",
          M, N,
          __builtin_ffs(M), __builtin_ffsl(M), __builtin_ffsll(M),
          __builtin_parity(M), __builtin_parityl(M),  
__builtin_parityll(M),
          __builtin_popcount(M), __builtin_popcountl(M),  
__builtin_popcountll(M),
          __builtin_ffs(N), __builtin_ffsl(N), __builtin_ffsll(N),
          __builtin_parity(N), __builtin_parityl(N),  
__builtin_parityll(N),
          __builtin_popcount(N), __builtin_popcountl(N),  
__builtin_popcountll(N));
}

with: clang -emit-llvm %s | not grep __builtin

or something like that.  The llvm-test suite can be used to verify
(Continue reading)

Permalink | Reply |

Gmane