c00a49ecd1
The test case testsuite/libffi.call/many.c can spuriously fail due to excess floating-point precision. Instrumenting it with some printf calls shows differences well above FLT_EPSILON. (Note when instrumenting it that multiple computations of the difference, such as one in a print and another in the conditional, may produce different results.) Rather than complicating the test suite with architecture-specific flags to avoid excess precision, just simplify the floating-point computation to avoid a dependency on potential excess precision.
72 lines
1.4 KiB
C
72 lines
1.4 KiB
C
/* Area: ffi_call
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Purpose: Check return value float, with many arguments
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Limitations: none.
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PR: none.
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Originator: From the original ffitest.c */
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/* { dg-do run } */
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#include "ffitest.h"
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#include <stdlib.h>
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#include <float.h>
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#include <math.h>
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static float many(float f1,
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float f2,
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float f3,
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float f4,
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float f5,
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float f6,
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float f7,
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float f8,
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float f9,
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float f10,
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float f11,
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float f12,
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float f13)
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{
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#if 0
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printf("%f %f %f %f %f %f %f %f %f %f %f %f %f\n",
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(double) f1, (double) f2, (double) f3, (double) f4, (double) f5,
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(double) f6, (double) f7, (double) f8, (double) f9, (double) f10,
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(double) f11, (double) f12, (double) f13);
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#endif
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return f1+f2+f3+f4+f5+f6+f7+f8+f9+f10+f11+f12+f13;
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}
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int main (void)
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{
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ffi_cif cif;
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ffi_type *args[13];
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void *values[13];
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float fa[13];
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float f, ff;
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int i;
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for (i = 0; i < 13; i++)
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{
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args[i] = &ffi_type_float;
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values[i] = &fa[i];
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fa[i] = (float) i;
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}
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/* Initialize the cif */
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CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 13,
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&ffi_type_float, args) == FFI_OK);
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ffi_call(&cif, FFI_FN(many), &f, values);
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ff = many(fa[0], fa[1],
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fa[2], fa[3],
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fa[4], fa[5],
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fa[6], fa[7],
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fa[8], fa[9],
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fa[10],fa[11],fa[12]);
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if (fabs(f - ff) < FLT_EPSILON)
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exit(0);
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else
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abort();
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}
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