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Diffstat (limited to 'doc/timesoftfloat.html')
| -rw-r--r-- | doc/timesoftfloat.html | 33 |
1 files changed, 18 insertions, 15 deletions
diff --git a/doc/timesoftfloat.html b/doc/timesoftfloat.html index f2b2e07..8494d89 100644 --- a/doc/timesoftfloat.html +++ b/doc/timesoftfloat.html @@ -7,11 +7,11 @@ <BODY> -<H1>Berkeley TestFloat Release 3b: <CODE>timesoftfloat</CODE></H1> +<H1>Berkeley TestFloat Release 3c: <CODE>timesoftfloat</CODE></H1> <P> John R. Hauser<BR> -2016 July 22<BR> +2017 February 10<BR> </P> @@ -34,8 +34,10 @@ see file <P> Ordinarily, <CODE>timesoftfloat</CODE> will measure a function’s speed -separately for each rounding mode defined by the IEEE Floating-Point Standard, -one after the other. +separately for each of the five rounding modes defined by the IEEE +Floating-Point Standard, one after the other, plus possibly a sixth mode, +<I>round to odd</I> (depending on the options selected when +<CODE>timesoftfloat</CODE> was compiled). If an operation is not supposed to require rounding, it will by default be timed only with the rounding mode set to <CODE>near_even</CODE> (nearest/even). In the same way, if an operation is affected by the way in which underflow @@ -79,13 +81,13 @@ The <CODE>timesoftfloat</CODE> program is executed as a command with this syntax: <BLOCKQUOTE> <PRE> -timesoftfloat [<option>...] <function> +timesoftfloat [<<I>option</I>>...] <<I>function</I>> </PRE> </BLOCKQUOTE> Square brackets (<CODE>[ ]</CODE>) denote optional arguments, -<CODE><option></CODE> is a supported option, and -<CODE><function></CODE> is the name of either a testable function or a -function set. +<CODE><<I>option</I>></CODE> is a supported option, and +<CODE><<I>function</I>></CODE> is the name of either a testable function +or a function set. The available options and function sets are documented below. If <CODE>timesoftfloat</CODE> is executed without any arguments, a summary of usage is written. @@ -122,7 +124,7 @@ All these options are ignored for operations not affected by rounding precision control. </P> -<H3><CODE>-rnear_even, -rnear_maxMag, -rminMag, -rmin, -rmax</CODE></H3> +<H3><CODE>-rnear_even, -rnear_maxMag, -rminMag, -rmin, -rmax, -rodd</CODE></H3> <P> The <CODE>-rnear_even</CODE> option restricts timing of an operation to only @@ -131,8 +133,9 @@ Other rounding mode choices are not timed. Likewise, <CODE>-rnear_maxMag</CODE> forces rounding to nearest/maximum magnitude (nearest-away), <CODE>-rminMag</CODE> forces rounding to minimum magnitude (toward zero), <CODE>-rmin</CODE> forces rounding to minimum (down, -toward negative infinity), and <CODE>-rmax</CODE> forces rounding to maximum -(up, toward positive infinity). +toward negative infinity), <CODE>-rmax</CODE> forces rounding to maximum (up, +toward positive infinity), and <CODE>-rodd</CODE>, if supported, forces +rounding to odd. These options are ignored for operations that are exact and thus do not round. </P> @@ -161,9 +164,9 @@ cases for which the <CODE><I>exact</I></CODE> operand is <CODE>true</CODE>. <H2>Function Sets</H2> <P> -Just as <CODE>timesoftfloat</CODE> can time a function for all five rounding -modes in sequence, multiple functions can be timed with a single execution of -<CODE>timesoftfloat</CODE>. +Just as <CODE>timesoftfloat</CODE> can time a function for all five or six +rounding modes in sequence, multiple functions can be timed with a single +execution of <CODE>timesoftfloat</CODE>. Three sets are recognized: <CODE>-all1</CODE>, <CODE>-all2</CODE>, and <CODE>-all</CODE>. The set <CODE>-all1</CODE> is all one-operand operations, <CODE>-all2</CODE> is @@ -172,7 +175,7 @@ A function set is used in place of a function name in the <CODE>timesoftfloat</CODE> command line, such as <BLOCKQUOTE> <PRE> -timesoftfloat [<option>...] -all1 +timesoftfloat [<<I>option</I>>...] -all1 </PRE> </BLOCKQUOTE> </P> |