xlc_dbl_u32.c revision 9bea4c13fca0e3bb4b719dcb3ed63d47d479294e 
1
2/* This is code generated by xlc -O3 for conversion of a double to an
3   unsigned 32-bit int, in a "floor" style.  It relies on doing an
4   fadd with a non-standard rounding mode and so checks that V handles
5   the rounding mode correctly.  r will be 1 if that is not so. */
6
7#include <stdio.h>
8
9extern unsigned int xlc_double_to_u32 ( double );
10asm("\n"
11".text\n"
12".global xlc_double_to_u32\n"
13".type xlc_double_to_u32, @function\n"
14"xlc_double_to_u32:\n"
15"        stwu    %r1,-48(%r1)\n"
16"        addis   %r4,%r0,.const_dr@ha\n"
17"        addis   %r0,%r0,17376\n"
18"        fabs    %f0,%f1\n"
19"        addi    %r3,%r0,0\n"
20"        mffs    %f3\n"
21"        mtfsb1  4*cr7+so\n"
22"        lfs     %f2,.const_dr@l(%r4)\n"
23"        fcmpu   0,%f1,%f0\n"
24"        fadd    %f0,%f0,%f2\n"
25"        mtfsf   255,%f3\n"
26"        stfd    %f0,24(%r1)\n"
27"        bne-    $+0x1c\n"
28"        lwz     %r3,24(%r1)\n"
29"        subf    %r0,%r3,%r0\n"
30"        srawi   %r0,%r0,31\n"
31"        ori     %r0,%r0,0x0000\n"
32"        lwz     %r4,28(%r1)\n"
33"        or      %r3,%r4,%r0\n"
34"        addi    %r1,%r1,48\n"
35"        blr\n"
36".size xlc_double_to_u32, . - xlc_double_to_u32\n"
37"        .long 0\n"
38"        .long 0x00000000\n"
39"        .long 0x00000000\n"
40"\n"
41"        .section        \".rodata\",\"a\"\n"
42"        .align  3\n"
43"        .type    .const_dr,@object\n"
44"        .size    .const_dr,20\n"
45".const_dr:\n"
46"        .long 0x59804000\n"
47"        .long 0x49424d20\n"
48"        .long 0x3fe66666\n"
49"        .long 0x66666666\n"
50"        .long 0x25640a00\n"
51);
52
53int main (int argc, char** argv)
54{
55  unsigned int r = xlc_double_to_u32 ( 0.7 );
56  if (r == 0)
57    printf("pass\n");
58  else
59    printf("fail\n");
60
61  return 0;
62}
63