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179 lines
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HTML
4 years ago
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<title>MIPS-3D Built-in Functions - Using the GNU Compiler Collection (GCC)</title>
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<link rel="up" href="MIPS-Loongson-Built_002din-Functions.html#MIPS-Loongson-Built_002din-Functions" title="MIPS Loongson Built-in Functions">
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<link rel="prev" href="Paired_002dSingle-Built_002din-Functions.html#Paired_002dSingle-Built_002din-Functions" title="Paired-Single Built-in Functions">
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Copyright (C) 1988-2015 Free Software Foundation, Inc.
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Permission is granted to copy, distribute and/or modify this document
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under the terms of the GNU Free Documentation License, Version 1.3 or
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any later version published by the Free Software Foundation; with the
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Invariant Sections being ``Funding Free Software'', the Front-Cover
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(a) The FSF's Front-Cover Text is:
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A GNU Manual
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(b) The FSF's Back-Cover Text is:
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<body>
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<div class="node">
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<a name="MIPS-3D-Built-in-Functions"></a>
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<a name="MIPS_002d3D-Built_002din-Functions"></a>
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<p>
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Previous: <a rel="previous" accesskey="p" href="Paired_002dSingle-Built_002din-Functions.html#Paired_002dSingle-Built_002din-Functions">Paired-Single Built-in Functions</a>,
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Up: <a rel="up" accesskey="u" href="MIPS-Loongson-Built_002din-Functions.html#MIPS-Loongson-Built_002din-Functions">MIPS Loongson Built-in Functions</a>
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<hr>
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</div>
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<h5 class="subsubsection">6.58.14.3 MIPS-3D Built-in Functions</h5>
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<p>The MIPS-3D Application-Specific Extension (ASE) includes additional
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paired-single instructions that are designed to improve the performance
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of 3D graphics operations. Support for these instructions is controlled
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by the <samp><span class="option">-mips3d</span></samp> command-line option.
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<p>The functions listed below map directly to a particular MIPS-3D
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instruction. Please refer to the architecture specification for
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more details on what each instruction does.
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<dl>
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<dt><code>v2sf __builtin_mips_addr_ps (v2sf, v2sf)</code><dd>Reduction add (<code>addr.ps</code>).
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<br><dt><code>v2sf __builtin_mips_mulr_ps (v2sf, v2sf)</code><dd>Reduction multiply (<code>mulr.ps</code>).
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<br><dt><code>v2sf __builtin_mips_cvt_pw_ps (v2sf)</code><dd>Convert paired single to paired word (<code>cvt.pw.ps</code>).
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<br><dt><code>v2sf __builtin_mips_cvt_ps_pw (v2sf)</code><dd>Convert paired word to paired single (<code>cvt.ps.pw</code>).
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<br><dt><code>float __builtin_mips_recip1_s (float)</code><dt><code>double __builtin_mips_recip1_d (double)</code><dt><code>v2sf __builtin_mips_recip1_ps (v2sf)</code><dd>Reduced-precision reciprocal (sequence step 1) (<code>recip1.</code><var>fmt</var>).
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<br><dt><code>float __builtin_mips_recip2_s (float, float)</code><dt><code>double __builtin_mips_recip2_d (double, double)</code><dt><code>v2sf __builtin_mips_recip2_ps (v2sf, v2sf)</code><dd>Reduced-precision reciprocal (sequence step 2) (<code>recip2.</code><var>fmt</var>).
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<br><dt><code>float __builtin_mips_rsqrt1_s (float)</code><dt><code>double __builtin_mips_rsqrt1_d (double)</code><dt><code>v2sf __builtin_mips_rsqrt1_ps (v2sf)</code><dd>Reduced-precision reciprocal square root (sequence step 1)
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(<code>rsqrt1.</code><var>fmt</var>).
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<br><dt><code>float __builtin_mips_rsqrt2_s (float, float)</code><dt><code>double __builtin_mips_rsqrt2_d (double, double)</code><dt><code>v2sf __builtin_mips_rsqrt2_ps (v2sf, v2sf)</code><dd>Reduced-precision reciprocal square root (sequence step 2)
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(<code>rsqrt2.</code><var>fmt</var>).
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</dl>
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<p>The following multi-instruction functions are also available.
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In each case, <var>cond</var> can be any of the 16 floating-point conditions:
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<code>f</code>, <code>un</code>, <code>eq</code>, <code>ueq</code>, <code>olt</code>, <code>ult</code>,
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<code>ole</code>, <code>ule</code>, <code>sf</code>, <code>ngle</code>, <code>seq</code>,
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<code>ngl</code>, <code>lt</code>, <code>nge</code>, <code>le</code> or <code>ngt</code>.
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<dl>
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<dt><code>int __builtin_mips_cabs_</code><var>cond</var><code>_s (float </code><var>a</var><code>, float </code><var>b</var><code>)</code><dt><code>int __builtin_mips_cabs_</code><var>cond</var><code>_d (double </code><var>a</var><code>, double </code><var>b</var><code>)</code><dd>Absolute comparison of two scalar values (<code>cabs.</code><var>cond</var><code>.</code><var>fmt</var>,
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<code>bc1t</code>/<code>bc1f</code>).
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<p>These functions compare <var>a</var> and <var>b</var> using <code>cabs.</code><var>cond</var><code>.s</code>
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or <code>cabs.</code><var>cond</var><code>.d</code> and return the result as a boolean value.
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For example:
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<pre class="smallexample"> float a, b;
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if (__builtin_mips_cabs_eq_s (a, b))
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true ();
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else
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false ();
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</pre>
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<br><dt><code>int __builtin_mips_upper_cabs_</code><var>cond</var><code>_ps (v2sf </code><var>a</var><code>, v2sf </code><var>b</var><code>)</code><dt><code>int __builtin_mips_lower_cabs_</code><var>cond</var><code>_ps (v2sf </code><var>a</var><code>, v2sf </code><var>b</var><code>)</code><dd>Absolute comparison of two paired-single values (<code>cabs.</code><var>cond</var><code>.ps</code>,
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<code>bc1t</code>/<code>bc1f</code>).
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<p>These functions compare <var>a</var> and <var>b</var> using <code>cabs.</code><var>cond</var><code>.ps</code>
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and return either the upper or lower half of the result. For example:
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<pre class="smallexample"> v2sf a, b;
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if (__builtin_mips_upper_cabs_eq_ps (a, b))
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upper_halves_are_equal ();
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else
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upper_halves_are_unequal ();
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if (__builtin_mips_lower_cabs_eq_ps (a, b))
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lower_halves_are_equal ();
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else
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lower_halves_are_unequal ();
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</pre>
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<br><dt><code>v2sf __builtin_mips_movt_cabs_</code><var>cond</var><code>_ps (v2sf </code><var>a</var><code>, v2sf </code><var>b</var><code>, v2sf </code><var>c</var><code>, v2sf </code><var>d</var><code>)</code><dt><code>v2sf __builtin_mips_movf_cabs_</code><var>cond</var><code>_ps (v2sf </code><var>a</var><code>, v2sf </code><var>b</var><code>, v2sf </code><var>c</var><code>, v2sf </code><var>d</var><code>)</code><dd>Conditional move based on absolute comparison (<code>cabs.</code><var>cond</var><code>.ps</code>,
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<code>movt.ps</code>/<code>movf.ps</code>).
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<p>The <code>movt</code> functions return the value <var>x</var> computed by:
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<pre class="smallexample"> cabs.<var>cond</var>.ps <var>cc</var>,<var>a</var>,<var>b</var>
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mov.ps <var>x</var>,<var>c</var>
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movt.ps <var>x</var>,<var>d</var>,<var>cc</var>
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</pre>
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<p>The <code>movf</code> functions are similar but use <code>movf.ps</code> instead
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of <code>movt.ps</code>.
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<br><dt><code>int __builtin_mips_any_c_</code><var>cond</var><code>_ps (v2sf </code><var>a</var><code>, v2sf </code><var>b</var><code>)</code><dt><code>int __builtin_mips_all_c_</code><var>cond</var><code>_ps (v2sf </code><var>a</var><code>, v2sf </code><var>b</var><code>)</code><dt><code>int __builtin_mips_any_cabs_</code><var>cond</var><code>_ps (v2sf </code><var>a</var><code>, v2sf </code><var>b</var><code>)</code><dt><code>int __builtin_mips_all_cabs_</code><var>cond</var><code>_ps (v2sf </code><var>a</var><code>, v2sf </code><var>b</var><code>)</code><dd>Comparison of two paired-single values
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(<code>c.</code><var>cond</var><code>.ps</code>/<code>cabs.</code><var>cond</var><code>.ps</code>,
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<code>bc1any2t</code>/<code>bc1any2f</code>).
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<p>These functions compare <var>a</var> and <var>b</var> using <code>c.</code><var>cond</var><code>.ps</code>
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or <code>cabs.</code><var>cond</var><code>.ps</code>. The <code>any</code> forms return true if either
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result is true and the <code>all</code> forms return true if both results are true.
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For example:
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<pre class="smallexample"> v2sf a, b;
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if (__builtin_mips_any_c_eq_ps (a, b))
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one_is_true ();
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else
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both_are_false ();
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if (__builtin_mips_all_c_eq_ps (a, b))
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both_are_true ();
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else
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one_is_false ();
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</pre>
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<br><dt><code>int __builtin_mips_any_c_</code><var>cond</var><code>_4s (v2sf </code><var>a</var><code>, v2sf </code><var>b</var><code>, v2sf </code><var>c</var><code>, v2sf </code><var>d</var><code>)</code><dt><code>int __builtin_mips_all_c_</code><var>cond</var><code>_4s (v2sf </code><var>a</var><code>, v2sf </code><var>b</var><code>, v2sf </code><var>c</var><code>, v2sf </code><var>d</var><code>)</code><dt><code>int __builtin_mips_any_cabs_</code><var>cond</var><code>_4s (v2sf </code><var>a</var><code>, v2sf </code><var>b</var><code>, v2sf </code><var>c</var><code>, v2sf </code><var>d</var><code>)</code><dt><code>int __builtin_mips_all_cabs_</code><var>cond</var><code>_4s (v2sf </code><var>a</var><code>, v2sf </code><var>b</var><code>, v2sf </code><var>c</var><code>, v2sf </code><var>d</var><code>)</code><dd>Comparison of four paired-single values
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(<code>c.</code><var>cond</var><code>.ps</code>/<code>cabs.</code><var>cond</var><code>.ps</code>,
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<code>bc1any4t</code>/<code>bc1any4f</code>).
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<p>These functions use <code>c.</code><var>cond</var><code>.ps</code> or <code>cabs.</code><var>cond</var><code>.ps</code>
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to compare <var>a</var> with <var>b</var> and to compare <var>c</var> with <var>d</var>.
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The <code>any</code> forms return true if any of the four results are true
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and the <code>all</code> forms return true if all four results are true.
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For example:
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<pre class="smallexample"> v2sf a, b, c, d;
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if (__builtin_mips_any_c_eq_4s (a, b, c, d))
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some_are_true ();
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else
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all_are_false ();
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if (__builtin_mips_all_c_eq_4s (a, b, c, d))
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all_are_true ();
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else
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some_are_false ();
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</pre>
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</dl>
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</body></html>
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