364 lines
7.1 KiB
C
364 lines
7.1 KiB
C
// RUN: %clang_builtins %s %librt -lm -o %t && %run %t
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// REQUIRES: librt_has_divsc3
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// REQUIRES: c99-complex
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#include "int_lib.h"
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#include <math.h>
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#include <complex.h>
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#include <stdio.h>
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// Returns: the quotient of (a + ib) / (c + id)
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COMPILER_RT_ABI float _Complex
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__divsc3(float __a, float __b, float __c, float __d);
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enum {zero, non_zero, inf, NaN, non_zero_nan};
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int
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classify(float _Complex x)
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{
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if (x == 0)
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return zero;
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if (isinf(crealf(x)) || isinf(cimagf(x)))
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return inf;
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if (isnan(crealf(x)) && isnan(cimagf(x)))
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return NaN;
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if (isnan(crealf(x)))
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{
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if (cimagf(x) == 0)
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return NaN;
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return non_zero_nan;
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}
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if (isnan(cimagf(x)))
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{
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if (crealf(x) == 0)
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return NaN;
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return non_zero_nan;
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}
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return non_zero;
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}
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int test__divsc3(float a, float b, float c, float d)
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{
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float _Complex r = __divsc3(a, b, c, d);
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// printf("test__divsc3(%f, %f, %f, %f) = %f + I%f\n",
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// a, b, c, d, crealf(r), cimagf(r));
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float _Complex dividend;
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float _Complex divisor;
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__real__ dividend = a;
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__imag__ dividend = b;
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__real__ divisor = c;
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__imag__ divisor = d;
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switch (classify(dividend))
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{
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case zero:
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switch (classify(divisor))
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{
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case zero:
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if (classify(r) != NaN)
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return 1;
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break;
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case non_zero:
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if (classify(r) != zero)
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return 1;
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break;
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case inf:
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if (classify(r) != zero)
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return 1;
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break;
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case NaN:
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if (classify(r) != NaN)
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return 1;
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break;
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case non_zero_nan:
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if (classify(r) != NaN)
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return 1;
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break;
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}
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break;
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case non_zero:
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switch (classify(divisor))
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{
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case zero:
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if (classify(r) != inf)
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return 1;
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break;
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case non_zero:
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if (classify(r) != non_zero)
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return 1;
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{
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float _Complex z = (a * c + b * d) / (c * c + d * d)
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+ (b * c - a * d) / (c * c + d * d) * _Complex_I;
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if (cabsf((r-z)/r) > 1.e-6)
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return 1;
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}
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break;
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case inf:
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if (classify(r) != zero)
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return 1;
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break;
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case NaN:
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if (classify(r) != NaN)
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return 1;
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break;
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case non_zero_nan:
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if (classify(r) != NaN)
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return 1;
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break;
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}
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break;
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case inf:
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switch (classify(divisor))
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{
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case zero:
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if (classify(r) != inf)
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return 1;
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break;
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case non_zero:
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if (classify(r) != inf)
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return 1;
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break;
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case inf:
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if (classify(r) != NaN)
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return 1;
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break;
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case NaN:
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if (classify(r) != NaN)
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return 1;
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break;
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case non_zero_nan:
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if (classify(r) != NaN)
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return 1;
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break;
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}
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break;
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case NaN:
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switch (classify(divisor))
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{
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case zero:
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if (classify(r) != NaN)
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return 1;
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break;
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case non_zero:
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if (classify(r) != NaN)
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return 1;
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break;
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case inf:
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if (classify(r) != NaN)
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return 1;
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break;
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case NaN:
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if (classify(r) != NaN)
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return 1;
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break;
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case non_zero_nan:
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if (classify(r) != NaN)
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return 1;
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break;
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}
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break;
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case non_zero_nan:
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switch (classify(divisor))
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{
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case zero:
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if (classify(r) != inf)
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return 1;
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break;
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case non_zero:
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if (classify(r) != NaN)
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return 1;
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break;
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case inf:
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if (classify(r) != NaN)
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return 1;
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break;
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case NaN:
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if (classify(r) != NaN)
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return 1;
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break;
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case non_zero_nan:
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if (classify(r) != NaN)
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return 1;
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break;
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}
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break;
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}
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return 0;
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}
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float x[][2] =
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{
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{ 1.e-6, 1.e-6},
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{-1.e-6, 1.e-6},
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{-1.e-6, -1.e-6},
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{ 1.e-6, -1.e-6},
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{ 1.e+6, 1.e-6},
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{-1.e+6, 1.e-6},
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{-1.e+6, -1.e-6},
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{ 1.e+6, -1.e-6},
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{ 1.e-6, 1.e+6},
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{-1.e-6, 1.e+6},
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{-1.e-6, -1.e+6},
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{ 1.e-6, -1.e+6},
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{ 1.e+6, 1.e+6},
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{-1.e+6, 1.e+6},
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{-1.e+6, -1.e+6},
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{ 1.e+6, -1.e+6},
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{NAN, NAN},
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{-INFINITY, NAN},
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{-2, NAN},
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{-1, NAN},
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{-0.5, NAN},
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{-0., NAN},
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{+0., NAN},
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{0.5, NAN},
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{1, NAN},
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{2, NAN},
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{INFINITY, NAN},
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{NAN, -INFINITY},
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{-INFINITY, -INFINITY},
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{-2, -INFINITY},
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{-1, -INFINITY},
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{-0.5, -INFINITY},
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{-0., -INFINITY},
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{+0., -INFINITY},
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{0.5, -INFINITY},
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{1, -INFINITY},
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{2, -INFINITY},
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{INFINITY, -INFINITY},
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{NAN, -2},
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{-INFINITY, -2},
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{-2, -2},
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{-1, -2},
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{-0.5, -2},
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{-0., -2},
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{+0., -2},
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{0.5, -2},
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{1, -2},
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{2, -2},
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{INFINITY, -2},
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{NAN, -1},
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{-INFINITY, -1},
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{-2, -1},
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{-1, -1},
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{-0.5, -1},
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{-0., -1},
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{+0., -1},
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{0.5, -1},
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{1, -1},
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{2, -1},
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{INFINITY, -1},
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{NAN, -0.5},
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{-INFINITY, -0.5},
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{-2, -0.5},
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{-1, -0.5},
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{-0.5, -0.5},
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{-0., -0.5},
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{+0., -0.5},
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{0.5, -0.5},
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{1, -0.5},
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{2, -0.5},
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{INFINITY, -0.5},
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{NAN, -0.},
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{-INFINITY, -0.},
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{-2, -0.},
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{-1, -0.},
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{-0.5, -0.},
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{-0., -0.},
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{+0., -0.},
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{0.5, -0.},
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{1, -0.},
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{2, -0.},
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{INFINITY, -0.},
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{NAN, 0.},
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{-INFINITY, 0.},
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{-2, 0.},
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{-1, 0.},
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{-0.5, 0.},
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{-0., 0.},
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{+0., 0.},
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{0.5, 0.},
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{1, 0.},
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{2, 0.},
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{INFINITY, 0.},
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{NAN, 0.5},
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{-INFINITY, 0.5},
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{-2, 0.5},
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{-1, 0.5},
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{-0.5, 0.5},
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{-0., 0.5},
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{+0., 0.5},
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{0.5, 0.5},
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{1, 0.5},
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{2, 0.5},
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{INFINITY, 0.5},
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{NAN, 1},
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{-INFINITY, 1},
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{-2, 1},
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{-1, 1},
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{-0.5, 1},
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{-0., 1},
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{+0., 1},
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{0.5, 1},
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{1, 1},
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{2, 1},
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{INFINITY, 1},
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{NAN, 2},
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{-INFINITY, 2},
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{-2, 2},
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{-1, 2},
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{-0.5, 2},
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{-0., 2},
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{+0., 2},
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{0.5, 2},
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{1, 2},
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{2, 2},
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{INFINITY, 2},
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{NAN, INFINITY},
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{-INFINITY, INFINITY},
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{-2, INFINITY},
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{-1, INFINITY},
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{-0.5, INFINITY},
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{-0., INFINITY},
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{+0., INFINITY},
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{0.5, INFINITY},
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{1, INFINITY},
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{2, INFINITY},
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{INFINITY, INFINITY}
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};
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int main()
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{
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const unsigned N = sizeof(x) / sizeof(x[0]);
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unsigned i, j;
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for (i = 0; i < N; ++i)
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{
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for (j = 0; j < N; ++j)
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{
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if (test__divsc3(x[i][0], x[i][1], x[j][0], x[j][1]))
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return 1;
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}
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}
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return 0;
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}
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