Use __signbit inline. Write 0.0/0.0 for NaN. Fix typo in test for `y
= 0.5'.
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parent
231e25e2a3
commit
62f075cd3b
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@ -27,10 +27,12 @@
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#define float_type double
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#endif
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#define __CONCATX(a,b) __CONCAT(a,b)
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#define CONCATX(a,b) __CONCAT(a,b)
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#define s(name) CONCATX(name,SUFF)
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#define m81(func) __m81_u(s(func))
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float_type
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__CONCATX(__ieee754_pow,SUFF) (float_type x, float_type y)
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s(__ieee754_pow) (float_type x, float_type y)
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{
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float_type z;
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float_type ax;
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@ -40,24 +42,24 @@ __CONCATX(__ieee754_pow,SUFF) (float_type x, float_type y)
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if (x != x || y != y)
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return x + y;
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if (__m81_u(__CONCATX(__isinf,SUFF)) (y))
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if (m81(__isinf) (y))
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{
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ax = __CONCATX(fabs,SUFF) (x);
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ax = s(fabs) (x);
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if (ax == 1)
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return y - y;
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return 0.0/0.0;
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if (ax > 1)
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return y > 0 ? y : 0;
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else
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return y < 0 ? -y : 0;
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}
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if (__CONCATX(fabs,SUFF) (y) == 1)
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if (s(fabs) (y) == 1)
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return y > 0 ? x : 1 / x;
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if (y == 2)
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return x * x;
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if (y == 0 && x >= 0)
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return __m81_u(__CONCATX(__ieee754_sqrt,SUFF)) (x);
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if (y == 0.5 && x >= 0)
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return m81(__ieee754_sqrt) (x);
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if (x == 10.0)
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{
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@ -70,19 +72,19 @@ __CONCATX(__ieee754_pow,SUFF) (float_type x, float_type y)
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return z;
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}
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ax = __CONCATX(fabs,SUFF) (x);
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if (__m81_u(__CONCATX(__isinf,SUFF)) (x) || x == 0 || ax == 1)
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ax = s(fabs) (x);
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if (m81(__isinf) (x) || x == 0 || ax == 1)
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{
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z = ax;
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if (y < 0)
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z = 1 / z;
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if (signbit (x))
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if (m81(__signbit) (x))
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{
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float_type temp = __m81_u (__CONCATX(__rint,SUFF)) (y);
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float_type temp = m81(__rint) (y);
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if (y != temp)
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{
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if (x == -1)
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z = (z - z) / (z - z);
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z = 0.0/0.0;
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}
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else
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{
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@ -105,12 +107,11 @@ __CONCATX(__ieee754_pow,SUFF) (float_type x, float_type y)
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if (x < 0.0)
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{
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float_type temp = __m81_u (__CONCATX(__rint,SUFF)) (y);
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float_type temp = m81(__rint) (y);
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if (y == temp)
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{
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long long i = (long long) y;
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z = (__m81_u(__CONCATX(__ieee754_exp,SUFF))
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(y * __m81_u(__CONCATX(__ieee754_log,SUFF)) (-x)));
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z = m81(__ieee754_exp) (y * m81(__ieee754_log) (-x));
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if (sizeof (float_type) == sizeof (float))
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{
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long i = (long) y;
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@ -126,10 +127,9 @@ __CONCATX(__ieee754_pow,SUFF) (float_type x, float_type y)
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}
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}
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else
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z = (x - x) / (x - x);
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z = 0.0/0.0;
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}
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else
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z = (__m81_u(__CONCATX(__ieee754_exp,SUFF))
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(y * __m81_u(__CONCATX(__ieee754_log,SUFF)) (x)));
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z = m81(__ieee754_exp) (y * m81(__ieee754_log) (x));
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return z;
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}
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