mirror of
https://github.com/fluencelabs/musl
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6ab8136b44
updated nextafter* to use FORCE_EVAL, it can be used in many other places in the math code to improve readability.
37 lines
647 B
C
37 lines
647 B
C
#include "libm.h"
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float nexttowardf(float x, long double y)
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{
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union fshape ux;
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uint32_t e;
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if (isnan(x) || isnan(y))
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return x + y;
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if (x == y)
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return y;
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ux.value = x;
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if (x == 0) {
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ux.bits = 1;
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if (signbit(y))
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ux.bits |= 0x80000000;
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} else if (x < y) {
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if (signbit(x))
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ux.bits--;
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else
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ux.bits++;
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} else {
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if (signbit(x))
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ux.bits++;
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else
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ux.bits--;
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}
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e = ux.bits & 0x7f800000;
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/* raise overflow if ux.value is infinite and x is finite */
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if (e == 0x7f800000)
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return x + x;
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/* raise underflow if ux.value is subnormal or zero */
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if (e == 0)
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FORCE_EVAL(x*x + ux.value*ux.value);
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return ux.value;
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}
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