d773588022
* config/fp-bit.c (clzusi): New function. (si_to_float, usi_to_float): Use it to compute proper shift. (usi_to_float): Preserve guard bits when shifting right. * libgcc-std.ver (GCC_4.2.0): New version. * libgcc2.c (__floatundixf, __floatunditf, __floatundidf, __floatundisf): New functions. * libgcc2.h (__floatundixf, __floatunditf, __floatundidf, __floatundisf): Declare. * mklibgcc.in (lib2funcs): Add _floatundidf, _floatundisf, _floatundixf, and _floatunditf. * optabs.c (expand_float): If target does not define a pattern for signed or unsigned conversion, use an unsigned libcall instead of a signed one. (init_optabs): Initialize ufloat_optab. testsuite: * gcc.c-torture/execute/floatunsisf-1.c: New test. From-SVN: r107345
22 lines
475 B
C
22 lines
475 B
C
/* The fp-bit.c function __floatunsisf had a latent bug where guard bits
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could be lost leading to incorrect rounding. */
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/* Origin: Joseph Myers <joseph@codesourcery.com> */
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extern void abort (void);
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extern void exit (int);
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#if __INT_MAX__ >= 0x7fffffff
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volatile unsigned u = 0x80000081;
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#else
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volatile unsigned long u = 0x80000081;
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#endif
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volatile float f1, f2;
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int
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main (void)
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{
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f1 = (float) u;
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f2 = (float) 0x80000081;
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if (f1 != f2)
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abort ();
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exit (0);
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}
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