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  /bionic/libm/x86/
s_cbrt.S 38 // cbrt(2^j * 1. b1 b2 .. b5 1) is approximated as T[j][b1..b5]+D[j][b1..b5]
44 // cbrt(NaN) = quiet NaN, and raise invalid exception
45 // cbrt(INF) = that INF
46 // cbrt(+/-0) = +/-0
66 # -- Begin cbrt
67 ENTRY(cbrt) function
224 END(cbrt)
225 # -- End cbrt
228 ALIAS_SYMBOL(cbrtl, cbrt);
  /bionic/libm/x86_64/
s_cbrt.S 38 // cbrt(2^j * 1. b1 b2 .. b5 1) is approximated as T[j][b1..b5]+D[j][b1..b5]
44 // cbrt(NaN) = quiet NaN, and raise invalid exception
45 // cbrt(INF) = that INF
46 // cbrt(+/-0) = +/-0
51 # -- Begin cbrt
52 ENTRY(cbrt) function
201 END(cbrt)
202 # -- End cbrt
  /bionic/libm/upstream-freebsd/lib/msun/src/
s_cbrt.c 21 /* cbrt(x)
28 /* |1/cbrt(x) - p(x)| < 2**-23.5 (~[-7.93e-8, 7.929e-8]). */
37 cbrt(double x) function
51 if(hx>=0x7ff00000) return(x+x); /* cbrt(NaN,INF) is itself */
54 * Rough cbrt to 5 bits:
55 * cbrt(2**e*(1+m) ~= 2**(e/3)*(1+(e%3+m)/3)
70 return(x); /* cbrt(0) is itself */
79 * New cbrt to 23 bits:
80 * cbrt(x) = t*cbrt(x/t**3) ~= t*P(t**3/x
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