42 lines
784 B
C
42 lines
784 B
C
#include "math.h"
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#include "math_private.h"
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static const float huge = 1.0e30;
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float ceilf(float x)
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{
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int32_t i0, j0;
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u_int32_t i;
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GET_FLOAT_WORD(i0, x);
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j0 = ((i0 >> 23) & 0xff) - 0x7f;
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if (j0 < 23) {
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if (j0 < 0) { /* raise inexact if x != 0 */
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if (huge + x > (float)0.0) { /* return 0*sign(x) if |x|<1 */
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if (i0 < 0) {
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i0 = 0x80000000;
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} else if (i0 != 0) {
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i0 = 0x3f800000;
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}
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}
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} else {
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i = (0x007fffff) >> j0;
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if ((i0 & i) == 0)
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return x; /* x is integral */
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if (huge + x > (float)0.0) { /* raise inexact flag */
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if (i0 > 0)
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i0 += (0x00800000) >> j0;
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i0 &= (~i);
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}
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}
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} else {
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if (j0 == 0x80)
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return x + x; /* inf or NaN */
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else
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return x; /* x is integral */
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}
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SET_FLOAT_WORD(x, i0);
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return x;
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}
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