none/tests/ppc32/xlc_dbl_u32.c

   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
   9 extern unsigned int xlc_double_to_u32 ( double );
  10 asm("\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 ".previous\n"
  41 "\n"
  42 "        .section        \".rodata\",\"a\"\n"
  43 "        .align  3\n"
  44 "        .type    .const_dr,@object\n"
  45 "        .size    .const_dr,20\n"
  46 ".const_dr:\n"
  47 "        .long 0x59804000\n"
  48 "        .long 0x49424d20\n"
  49 "        .long 0x3fe66666\n"
  50 "        .long 0x66666666\n"
  51 "        .long 0x25640a00\n"
  52 ".previous\n"
  53 );
  54
  55 int main (int argc, char** argv)
  56 {
  57   unsigned int r = xlc_double_to_u32 ( 0.7 );
  58   if (r == 0)
  59     printf("pass\n");
  60   else
  61     printf("fail\n");
  62
  63   return 0;
  64 }