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| <a name="MIPS_002d3D-Built_002din-Functions-1"></a> |
| <h4 class="subsubsection">6.58.14.3 MIPS-3D Built-in Functions</h4> |
| |
| <p>The MIPS-3D Application-Specific Extension (ASE) includes additional |
| paired-single instructions that are designed to improve the performance |
| of 3D graphics operations. Support for these instructions is controlled |
| by the <samp>-mips3d</samp> command-line option. |
| </p> |
| <p>The functions listed below map directly to a particular MIPS-3D |
| instruction. Please refer to the architecture specification for |
| more details on what each instruction does. |
| </p> |
| <dl compact="compact"> |
| <dt><code>v2sf __builtin_mips_addr_ps (v2sf, v2sf)</code></dt> |
| <dd><p>Reduction add (<code>addr.ps</code>). |
| </p> |
| </dd> |
| <dt><code>v2sf __builtin_mips_mulr_ps (v2sf, v2sf)</code></dt> |
| <dd><p>Reduction multiply (<code>mulr.ps</code>). |
| </p> |
| </dd> |
| <dt><code>v2sf __builtin_mips_cvt_pw_ps (v2sf)</code></dt> |
| <dd><p>Convert paired single to paired word (<code>cvt.pw.ps</code>). |
| </p> |
| </dd> |
| <dt><code>v2sf __builtin_mips_cvt_ps_pw (v2sf)</code></dt> |
| <dd><p>Convert paired word to paired single (<code>cvt.ps.pw</code>). |
| </p> |
| </dd> |
| <dt><code>float __builtin_mips_recip1_s (float)</code></dt> |
| <dt><code>double __builtin_mips_recip1_d (double)</code></dt> |
| <dt><code>v2sf __builtin_mips_recip1_ps (v2sf)</code></dt> |
| <dd><p>Reduced-precision reciprocal (sequence step 1) (<code>recip1.<var>fmt</var></code>). |
| </p> |
| </dd> |
| <dt><code>float __builtin_mips_recip2_s (float, float)</code></dt> |
| <dt><code>double __builtin_mips_recip2_d (double, double)</code></dt> |
| <dt><code>v2sf __builtin_mips_recip2_ps (v2sf, v2sf)</code></dt> |
| <dd><p>Reduced-precision reciprocal (sequence step 2) (<code>recip2.<var>fmt</var></code>). |
| </p> |
| </dd> |
| <dt><code>float __builtin_mips_rsqrt1_s (float)</code></dt> |
| <dt><code>double __builtin_mips_rsqrt1_d (double)</code></dt> |
| <dt><code>v2sf __builtin_mips_rsqrt1_ps (v2sf)</code></dt> |
| <dd><p>Reduced-precision reciprocal square root (sequence step 1) |
| (<code>rsqrt1.<var>fmt</var></code>). |
| </p> |
| </dd> |
| <dt><code>float __builtin_mips_rsqrt2_s (float, float)</code></dt> |
| <dt><code>double __builtin_mips_rsqrt2_d (double, double)</code></dt> |
| <dt><code>v2sf __builtin_mips_rsqrt2_ps (v2sf, v2sf)</code></dt> |
| <dd><p>Reduced-precision reciprocal square root (sequence step 2) |
| (<code>rsqrt2.<var>fmt</var></code>). |
| </p></dd> |
| </dl> |
| |
| <p>The following multi-instruction functions are also available. |
| In each case, <var>cond</var> can be any of the 16 floating-point conditions: |
| <code>f</code>, <code>un</code>, <code>eq</code>, <code>ueq</code>, <code>olt</code>, <code>ult</code>, |
| <code>ole</code>, <code>ule</code>, <code>sf</code>, <code>ngle</code>, <code>seq</code>, |
| <code>ngl</code>, <code>lt</code>, <code>nge</code>, <code>le</code> or <code>ngt</code>. |
| </p> |
| <dl compact="compact"> |
| <dt><code>int __builtin_mips_cabs_<var>cond</var>_s (float <var>a</var>, float <var>b</var>)</code></dt> |
| <dt><code>int __builtin_mips_cabs_<var>cond</var>_d (double <var>a</var>, double <var>b</var>)</code></dt> |
| <dd><p>Absolute comparison of two scalar values (<code>cabs.<var>cond</var>.<var>fmt</var></code>, |
| <code>bc1t</code>/<code>bc1f</code>). |
| </p> |
| <p>These functions compare <var>a</var> and <var>b</var> using <code>cabs.<var>cond</var>.s</code> |
| or <code>cabs.<var>cond</var>.d</code> and return the result as a boolean value. |
| For example: |
| </p> |
| <div class="smallexample"> |
| <pre class="smallexample">float a, b; |
| if (__builtin_mips_cabs_eq_s (a, b)) |
| true (); |
| else |
| false (); |
| </pre></div> |
| |
| </dd> |
| <dt><code>int __builtin_mips_upper_cabs_<var>cond</var>_ps (v2sf <var>a</var>, v2sf <var>b</var>)</code></dt> |
| <dt><code>int __builtin_mips_lower_cabs_<var>cond</var>_ps (v2sf <var>a</var>, v2sf <var>b</var>)</code></dt> |
| <dd><p>Absolute comparison of two paired-single values (<code>cabs.<var>cond</var>.ps</code>, |
| <code>bc1t</code>/<code>bc1f</code>). |
| </p> |
| <p>These functions compare <var>a</var> and <var>b</var> using <code>cabs.<var>cond</var>.ps</code> |
| and return either the upper or lower half of the result. For example: |
| </p> |
| <div class="smallexample"> |
| <pre class="smallexample">v2sf a, b; |
| if (__builtin_mips_upper_cabs_eq_ps (a, b)) |
| upper_halves_are_equal (); |
| else |
| upper_halves_are_unequal (); |
| |
| if (__builtin_mips_lower_cabs_eq_ps (a, b)) |
| lower_halves_are_equal (); |
| else |
| lower_halves_are_unequal (); |
| </pre></div> |
| |
| </dd> |
| <dt><code>v2sf __builtin_mips_movt_cabs_<var>cond</var>_ps (v2sf <var>a</var>, v2sf <var>b</var>, v2sf <var>c</var>, v2sf <var>d</var>)</code></dt> |
| <dt><code>v2sf __builtin_mips_movf_cabs_<var>cond</var>_ps (v2sf <var>a</var>, v2sf <var>b</var>, v2sf <var>c</var>, v2sf <var>d</var>)</code></dt> |
| <dd><p>Conditional move based on absolute comparison (<code>cabs.<var>cond</var>.ps</code>, |
| <code>movt.ps</code>/<code>movf.ps</code>). |
| </p> |
| <p>The <code>movt</code> functions return the value <var>x</var> computed by: |
| </p> |
| <div class="smallexample"> |
| <pre class="smallexample">cabs.<var>cond</var>.ps <var>cc</var>,<var>a</var>,<var>b</var> |
| mov.ps <var>x</var>,<var>c</var> |
| movt.ps <var>x</var>,<var>d</var>,<var>cc</var> |
| </pre></div> |
| |
| <p>The <code>movf</code> functions are similar but use <code>movf.ps</code> instead |
| of <code>movt.ps</code>. |
| </p> |
| </dd> |
| <dt><code>int __builtin_mips_any_c_<var>cond</var>_ps (v2sf <var>a</var>, v2sf <var>b</var>)</code></dt> |
| <dt><code>int __builtin_mips_all_c_<var>cond</var>_ps (v2sf <var>a</var>, v2sf <var>b</var>)</code></dt> |
| <dt><code>int __builtin_mips_any_cabs_<var>cond</var>_ps (v2sf <var>a</var>, v2sf <var>b</var>)</code></dt> |
| <dt><code>int __builtin_mips_all_cabs_<var>cond</var>_ps (v2sf <var>a</var>, v2sf <var>b</var>)</code></dt> |
| <dd><p>Comparison of two paired-single values |
| (<code>c.<var>cond</var>.ps</code>/<code>cabs.<var>cond</var>.ps</code>, |
| <code>bc1any2t</code>/<code>bc1any2f</code>). |
| </p> |
| <p>These functions compare <var>a</var> and <var>b</var> using <code>c.<var>cond</var>.ps</code> |
| or <code>cabs.<var>cond</var>.ps</code>. The <code>any</code> forms return true if either |
| result is true and the <code>all</code> forms return true if both results are true. |
| For example: |
| </p> |
| <div class="smallexample"> |
| <pre class="smallexample">v2sf a, b; |
| if (__builtin_mips_any_c_eq_ps (a, b)) |
| one_is_true (); |
| else |
| both_are_false (); |
| |
| if (__builtin_mips_all_c_eq_ps (a, b)) |
| both_are_true (); |
| else |
| one_is_false (); |
| </pre></div> |
| |
| </dd> |
| <dt><code>int __builtin_mips_any_c_<var>cond</var>_4s (v2sf <var>a</var>, v2sf <var>b</var>, v2sf <var>c</var>, v2sf <var>d</var>)</code></dt> |
| <dt><code>int __builtin_mips_all_c_<var>cond</var>_4s (v2sf <var>a</var>, v2sf <var>b</var>, v2sf <var>c</var>, v2sf <var>d</var>)</code></dt> |
| <dt><code>int __builtin_mips_any_cabs_<var>cond</var>_4s (v2sf <var>a</var>, v2sf <var>b</var>, v2sf <var>c</var>, v2sf <var>d</var>)</code></dt> |
| <dt><code>int __builtin_mips_all_cabs_<var>cond</var>_4s (v2sf <var>a</var>, v2sf <var>b</var>, v2sf <var>c</var>, v2sf <var>d</var>)</code></dt> |
| <dd><p>Comparison of four paired-single values |
| (<code>c.<var>cond</var>.ps</code>/<code>cabs.<var>cond</var>.ps</code>, |
| <code>bc1any4t</code>/<code>bc1any4f</code>). |
| </p> |
| <p>These functions use <code>c.<var>cond</var>.ps</code> or <code>cabs.<var>cond</var>.ps</code> |
| to compare <var>a</var> with <var>b</var> and to compare <var>c</var> with <var>d</var>. |
| The <code>any</code> forms return true if any of the four results are true |
| and the <code>all</code> forms return true if all four results are true. |
| For example: |
| </p> |
| <div class="smallexample"> |
| <pre class="smallexample">v2sf a, b, c, d; |
| if (__builtin_mips_any_c_eq_4s (a, b, c, d)) |
| some_are_true (); |
| else |
| all_are_false (); |
| |
| if (__builtin_mips_all_c_eq_4s (a, b, c, d)) |
| all_are_true (); |
| else |
| some_are_false (); |
| </pre></div> |
| </dd> |
| </dl> |
| |
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