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annotate gcc/testsuite/gcc.dg/torture/float128-truncdf-underflow.c @ 131:84e7813d76e9

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gcc-8.2
author mir3636
date Thu, 25 Oct 2018 07:37:49 +0900
parents 04ced10e8804
children
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111
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1 /* Test truncation from __float128 to double uses after-rounding
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2 tininess detection. */
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3
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4 /* { dg-do run { target i?86-*-* x86_64-*-* ia64-*-* } } */
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5 /* { dg-options "" } */
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6 /* { dg-require-effective-target fenv_exceptions } */
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7
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8 #include <fenv.h>
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9 #include <stdlib.h>
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10
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11 int
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12 main (void)
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13 {
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14 volatile __float128 a = 0x0.fffffffffffffffp-1022q, b = 0x0.fffffffffffff8p-1022q;
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15 volatile double r;
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16 r = (double) a;
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17 if (fetestexcept (FE_UNDERFLOW))
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18 abort ();
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19 if (r != 0x1p-1022)
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20 abort ();
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21 r = (double) b;
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22 if (!fetestexcept (FE_UNDERFLOW))
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23 abort ();
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24 if (r != 0x1p-1022)
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25 abort ();
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26 exit (0);
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27 }