Thread: [Win32forth-cvs] win32forth/doc p-float.htm,1.3,1.4

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	p-float.htm 
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Index: p-float.htm
===================================================================
RCS file: /cvsroot/win32forth/win32forth/doc/p-float.htm,v
retrieving revision 1.3
retrieving revision 1.4
diff -C2 -d -r1.3 -r1.4
*** p-float.htm	28 Jan 2006 10:28:30 -0000	1.3
--- p-float.htm	30 Jan 2006 13:58:10 -0000	1.4
***************
*** 61,67 ****
  POSTPONEd.
  </p><pre><b><a name="0">: FCONSTANT &nbsp;&nbsp;&nbsp;&nbsp;\ ANSI &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Floating
! </a></b></pre><p><b>&nbsp;Compiling: ( -&lt;name&gt;- ) ( F: r -- ) <br />
! </b><b>&nbsp;Run-time: &nbsp;( F: -- r ) </b>&nbsp;<br />
! </p><p>Define an FP constant.
  </p><h3>Stack operations
  </h3><pre><b><a name="0">code FDROP &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;( fs: r -- ) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\ ANSI &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Floating
--- 61,77 ----
  POSTPONEd.
  </p><pre><b><a name="0">: FCONSTANT &nbsp;&nbsp;&nbsp;&nbsp;\ ANSI &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Floating
! </a></b></pre><p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<b>&nbsp;Interpretation: ( -&lt;name&gt;- ) ( F: r -- ) </b>&nbsp;<br />
! Define an FP constant. <br />
! &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<b>&nbsp;Compilation: </b>&nbsp;<br />
! Append the run-time semantics given below to the current definition. <br />
! &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<b>&nbsp;Run-time: &nbsp;( F: -- r ) </b>&nbsp;<br />
! Place r on the floating-point stack.
! </p><pre><b><a name="0">: FLITERAL &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;( fs: r -- ) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\ ANSI &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Floating
! </a></b></pre><p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<b>&nbsp;Interpretation: </b>&nbsp;<br />
! Interpretation semantics for this word are undefined. <br />
! &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<b>&nbsp;Compilation: ( F: r -- ) </b>&nbsp;<br />
! Append the run-time semantics given below to the current definition. <br />
! &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<b>&nbsp;Run-time: ( F: -- r ) </b>&nbsp;<br />
! Place r on the floating-point stack.
  </p><h3>Stack operations
  </h3><pre><b><a name="0">code FDROP &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;( fs: r -- ) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\ ANSI &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Floating
***************
*** 71,75 ****
  </p><pre><b><a name="0">code FSWAP &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;( fs: r1 r2 -- r2 r1 ) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\ ANSI &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Floating
  </a></b></pre><p>Exchange the top 2 FP numbers.
! </p><pre><b><a name="0">code FOVER &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;( fs: r1 r2 -- r1 r2 r3 ) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\ ANSI &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Floating
  </a></b></pre><p>Copy the 2nd FP stack number to the top of the FP stack.
  </p><pre><b><a name="0">code FROT &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;( fs: r1 r2 r3 -- r2 r3 r1 ) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\ ANSI &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Floating
--- 81,85 ----
  </p><pre><b><a name="0">code FSWAP &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;( fs: r1 r2 -- r2 r1 ) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\ ANSI &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Floating
  </a></b></pre><p>Exchange the top 2 FP numbers.
! </p><pre><b><a name="0">code FOVER &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;( fs: r1 r2 -- r1 r2 r1 ) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\ ANSI &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Floating
  </a></b></pre><p>Copy the 2nd FP stack number to the top of the FP stack.
  </p><pre><b><a name="0">code FROT &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;( fs: r1 r2 r3 -- r2 r3 r1 ) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\ ANSI &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Floating
***************
*** 84,88 ****
  </p><pre><b><a name="0">code F2DROP &nbsp;&nbsp;&nbsp;&nbsp;( fs: r1 r2 -- ) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\ W32F &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Floating extra
  </a></b></pre><p>Remove the top 2 FP stack entries.
! </p><pre><b><a name="0">: F2DUP &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;( fs: r1 r2 -- r1 r2 r3 r4 ) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\ W32F &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Floating extra
  </a></b></pre><p>Duplicate the top 2 FP stack entries.
  </p><pre><b><a name="0">: F2SWAP &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;( fs: r1 r2 r3 r4 -- r3 r4 r2 r1 ) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\ W32F &nbsp;&nbsp;&nbsp;&nbsp;Floating extra
--- 94,98 ----
  </p><pre><b><a name="0">code F2DROP &nbsp;&nbsp;&nbsp;&nbsp;( fs: r1 r2 -- ) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\ W32F &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Floating extra
  </a></b></pre><p>Remove the top 2 FP stack entries.
! </p><pre><b><a name="0">: F2DUP &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;( fs: r1 r2 -- r1 r2 r1 r2 ) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\ W32F &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Floating extra
  </a></b></pre><p>Duplicate the top 2 FP stack entries.
  </p><pre><b><a name="0">: F2SWAP &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;( fs: r1 r2 r3 r4 -- r3 r4 r2 r1 ) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\ W32F &nbsp;&nbsp;&nbsp;&nbsp;Floating extra
***************
*** 102,106 ****
  </a></b></pre><p>Push the value of log base 10 of 2.
  </p><pre><b><a name="0">code fLn2 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;( fs: -- r ) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\ W32F &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Floating extra
! </a></b></pre><p>Push the vlue of ln 2 (the natural logarithm).
  </p><pre><b><a name="0">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;f1.0 fconstant f0.0 ( FS: -- r ) \ W32F &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Floating extra
  </a></b></pre><p>Push plus zero.
--- 112,116 ----
  </a></b></pre><p>Push the value of log base 10 of 2.
  </p><pre><b><a name="0">code fLn2 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;( fs: -- r ) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\ W32F &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Floating extra
! </a></b></pre><p>Push the value of ln 2 (the natural logarithm).
  </p><pre><b><a name="0">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;f1.0 fconstant f0.0 ( FS: -- r ) \ W32F &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Floating extra
  </a></b></pre><p>Push plus zero.
***************
*** 108,112 ****
  </a></b></pre><p>Push plus infinity.
  </p><pre><b><a name="0">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;f1.0 fconstant f2.0 ( FS: -- r ) \ W32F &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Floating extra
! </a></b></pre><p>Push 2.0
  </p><h3>Rounding Modes
  </h3><pre><b><a name="0">code FLOOR &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;( fs: f1 -- fs: f2 ) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\ ANSI &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Floating
--- 118,139 ----
  </a></b></pre><p>Push plus infinity.
  </p><pre><b><a name="0">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;f1.0 fconstant f2.0 ( FS: -- r ) \ W32F &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Floating extra
! </a></b></pre><p>Push floating-point 2.0.
! </p><pre><b><a name="0">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;f0.0 fconstant f10.0 ( FS: -- r ) \ W32F &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Floating extra
! </a></b></pre><p>Push floating-point 10.0.
! </p><pre><b><a name="0">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;f1.0 fconstant f0.5 ( FS: -- r ) \ W32F &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Floating extra
! </a></b></pre><p>Push floating-point 0.5.
! </p><pre><b><a name="0">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;f0.0 fconstant fbig ( FS: -- r ) \ W32F &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Floating extra
! </a></b></pre><p>Push the largest non-infinite floating-point number.
! </p><pre><b><a name="0">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;f0.0 fconstant feps ( FS: -- r ) \ W32F &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Floating extra
! </a></b></pre><p>Push the smallest non-zero floating-point number.
! </p><pre><b><a name="0">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;f1.0 fconstant fsmall ( FS: -- r ) \ W32F &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Floating extra
! </a></b></pre><p>Push the smallest non-denormalised floating-point number.
! </p><h3>Variables
! </h3><pre><b><a name="0">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;fvariable a2**63 &nbsp;&nbsp;&nbsp;( -- addr ) &nbsp;\ W32F &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Floating extra
! </a></b></pre><p>Return the address of a float containing 2**63.
! </p><pre><b><a name="0">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;fvariable sq2m1 &nbsp;&nbsp;&nbsp;( -- addr ) &nbsp;\ W32F &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Floating extra
! </a></b></pre><p>Return the address of a float containing sqrt(2) - 1.
! </p><pre><b><a name="0">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;fvariable sq2/2m1 &nbsp;&nbsp;&nbsp;( -- addr ) &nbsp;\ W32F &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Floating extra
! </a></b></pre><p>Return the address of a float containing sqrt(2)/2 - 1.
  </p><h3>Rounding Modes
  </h3><pre><b><a name="0">code FLOOR &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;( fs: f1 -- fs: f2 ) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\ ANSI &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Floating
***************
*** 119,123 ****
  </a></b></pre><p>Set rounding mode to round to nearest.
  </p><h3>Integer to float coversion
! </h3><h3>Comparison operators
  </h3><h3>Maths operators
  </h3><pre><b><a name="0">code F+ &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;( fs: r1 r2 -- r3 ) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\ ANSI &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Floating
--- 146,155 ----
  </a></b></pre><p>Set rounding mode to round to nearest.
  </p><h3>Integer to float coversion
! </h3><pre><b><a name="0">code D&gt;F &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;( d -- ) &nbsp;( F: -- r ) &nbsp;&nbsp;\ ANSI &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Floating
! </a></b></pre><p>Convert double number to floating-point number.
! </p><pre><b><a name="0">code F&gt;D &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;( -- d ) &nbsp;( fs: r -- ) &nbsp;\ ANSI &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Floating
! </a></b></pre><p>Convert floating-point number to double number. If the result would be too large
! to fit in a double number then <br />&nbsp;-9223372036854775808 is returned.
! </p><h3>Comparison operators
  </h3><h3>Maths operators
  </h3><pre><b><a name="0">code F+ &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;( fs: r1 r2 -- r3 ) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\ ANSI &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Floating
***************
*** 132,139 ****
  </a></b></pre><p>Reverse the sign of r1.
  </p><h3>Trigonometric functions
! </h3><h3>Inverse Trigonometric functions
! </h3><pre><b><a name="0">code FATAN2 &nbsp;&nbsp;&nbsp;&nbsp;( fs: r1 r2 -- r3 ) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\ ANSI &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Floating ext
! </a></b></pre><p>r3 is the radian angle whose tangent is r1/r2. If r1 and r2 are both zero then r3
! is zero.
  </p><h3>Output conversion.
  </h3><pre><b><a name="0">: PRECISION &nbsp;&nbsp;&nbsp;&nbsp;( -- u ) &nbsp;&nbsp;&nbsp;&nbsp;\ ANSI &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Floating ext
--- 164,193 ----
  </a></b></pre><p>Reverse the sign of r1.
  </p><h3>Trigonometric functions
! </h3><pre><b><a name="0">: FSIN &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;( f: r1 -- r2 ) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\ ANSI &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Floating ext
! </a></b></pre><p>r2 is the sine of r1 in radians.
! </p><pre><b><a name="0">: FCOS &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;( f: r1 -- r2 ) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\ ANSI &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Floating ext
! </a></b></pre><p>r2 is the cosine of r1 in radians.
! </p><pre><b><a name="0">: FSINCOS &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;( f: r1 -- r2 r3 ) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\ ANSI &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Floating ext
! </a></b></pre><p>r2 is the sine and r3 the cosine of r1 in radians. This function is more efficient
! than calling FSIN and FCOS separately.
! </p><pre><b><a name="0">: FTAN &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;( f: r1 -- r2 ) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\ ANSI &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Floating ext
! </a></b></pre><p>r2 is the tangent of r1 in radians.
! </p><h3>Inverse Trigonometric functions
! </h3><pre><b><a name="0">code FASIN &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;( fs: r1 -- r2 ) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\ ANSI &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Floating ext
! </a></b></pre><p>r2 is the radian angle whose sine is r1. The result for |x| =&lt; 1 is between ±pi/2.
! The result for |x| &gt;&nbsp;1 is NAN.
! </p><pre><b><a name="0">code FACOS &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;( fs: r1 -- r2 ) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\ ANSI &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Floating ext
! </a></b></pre><p>r2 is the radian angle whose cosine is r1. The result for |x| =&lt; 1 is between 0 and pi.
! The result for |x| &gt;&nbsp;1 is NAN
! </p><pre><b><a name="0">code FATAN &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;( fs: r1 -- r2 ) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\ ANSI &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Floating ext
! </a></b></pre><p>r2 is the radian angle whose tangent is r1. The result is between ±pi/2.
! </p><pre><b><a name="0">code FATAN2 &nbsp;&nbsp;&nbsp;&nbsp;( fs: r1 r2 -- r3 ) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\ ANSI &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Floating ext
! </a></b></pre><p>r3 is the radian angle whose tangent is r1/r2. The result is between ±pi
! with the same sign as r2. If r1 and r2 are both zero then r3 is ±zero.
! This function can be used to convert cartesian coordinates into the angle of the
! polar coordinates.
! </p><h3>Logarithmic functions
! </h3><pre><b><a name="0">code FLNP1 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;( fs: r1 -- r2 ) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\ ANSI &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Floating ext
! </a></b></pre><p>? error for x &lt;= -1
  </p><h3>Output conversion.
  </h3><pre><b><a name="0">: PRECISION &nbsp;&nbsp;&nbsp;&nbsp;( -- u ) &nbsp;&nbsp;&nbsp;&nbsp;\ ANSI &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Floating ext

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