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| Next: <a href="S_002f390-System-z-Built_002din-Functions.html#S_002f390-System-z-Built_002din-Functions" accesskey="n" rel="next">S/390 System z Built-in Functions</a>, Previous: <a href="PowerPC-Hardware-Transactional-Memory-Built_002din-Functions.html#PowerPC-Hardware-Transactional-Memory-Built_002din-Functions" accesskey="p" rel="prev">PowerPC Hardware Transactional Memory Built-in Functions</a>, Up: <a href="Target-Builtins.html#Target-Builtins" accesskey="u" rel="up">Target Builtins</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Option-Index.html#Option-Index" title="Index" rel="index">Index</a>]</p> |
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| <a name="RX-Built_002din-Functions-1"></a> |
| <h4 class="subsection">6.58.22 RX Built-in Functions</h4> |
| <p>GCC supports some of the RX instructions which cannot be expressed in |
| the C programming language via the use of built-in functions. The |
| following functions are supported: |
| </p> |
| <dl> |
| <dt><a name="index-_005f_005fbuiltin_005frx_005fbrk"></a>Built-in Function: <em>void</em> <strong>__builtin_rx_brk</strong> <em>(void)</em></dt> |
| <dd><p>Generates the <code>brk</code> machine instruction. |
| </p></dd></dl> |
| |
| <dl> |
| <dt><a name="index-_005f_005fbuiltin_005frx_005fclrpsw"></a>Built-in Function: <em>void</em> <strong>__builtin_rx_clrpsw</strong> <em>(int)</em></dt> |
| <dd><p>Generates the <code>clrpsw</code> machine instruction to clear the specified |
| bit in the processor status word. |
| </p></dd></dl> |
| |
| <dl> |
| <dt><a name="index-_005f_005fbuiltin_005frx_005fint"></a>Built-in Function: <em>void</em> <strong>__builtin_rx_int</strong> <em>(int)</em></dt> |
| <dd><p>Generates the <code>int</code> machine instruction to generate an interrupt |
| with the specified value. |
| </p></dd></dl> |
| |
| <dl> |
| <dt><a name="index-_005f_005fbuiltin_005frx_005fmachi"></a>Built-in Function: <em>void</em> <strong>__builtin_rx_machi</strong> <em>(int, int)</em></dt> |
| <dd><p>Generates the <code>machi</code> machine instruction to add the result of |
| multiplying the top 16 bits of the two arguments into the |
| accumulator. |
| </p></dd></dl> |
| |
| <dl> |
| <dt><a name="index-_005f_005fbuiltin_005frx_005fmaclo"></a>Built-in Function: <em>void</em> <strong>__builtin_rx_maclo</strong> <em>(int, int)</em></dt> |
| <dd><p>Generates the <code>maclo</code> machine instruction to add the result of |
| multiplying the bottom 16 bits of the two arguments into the |
| accumulator. |
| </p></dd></dl> |
| |
| <dl> |
| <dt><a name="index-_005f_005fbuiltin_005frx_005fmulhi"></a>Built-in Function: <em>void</em> <strong>__builtin_rx_mulhi</strong> <em>(int, int)</em></dt> |
| <dd><p>Generates the <code>mulhi</code> machine instruction to place the result of |
| multiplying the top 16 bits of the two arguments into the |
| accumulator. |
| </p></dd></dl> |
| |
| <dl> |
| <dt><a name="index-_005f_005fbuiltin_005frx_005fmullo"></a>Built-in Function: <em>void</em> <strong>__builtin_rx_mullo</strong> <em>(int, int)</em></dt> |
| <dd><p>Generates the <code>mullo</code> machine instruction to place the result of |
| multiplying the bottom 16 bits of the two arguments into the |
| accumulator. |
| </p></dd></dl> |
| |
| <dl> |
| <dt><a name="index-_005f_005fbuiltin_005frx_005fmvfachi"></a>Built-in Function: <em>int</em> <strong>__builtin_rx_mvfachi</strong> <em>(void)</em></dt> |
| <dd><p>Generates the <code>mvfachi</code> machine instruction to read the top |
| 32 bits of the accumulator. |
| </p></dd></dl> |
| |
| <dl> |
| <dt><a name="index-_005f_005fbuiltin_005frx_005fmvfacmi"></a>Built-in Function: <em>int</em> <strong>__builtin_rx_mvfacmi</strong> <em>(void)</em></dt> |
| <dd><p>Generates the <code>mvfacmi</code> machine instruction to read the middle |
| 32 bits of the accumulator. |
| </p></dd></dl> |
| |
| <dl> |
| <dt><a name="index-_005f_005fbuiltin_005frx_005fmvfc"></a>Built-in Function: <em>int</em> <strong>__builtin_rx_mvfc</strong> <em>(int)</em></dt> |
| <dd><p>Generates the <code>mvfc</code> machine instruction which reads the control |
| register specified in its argument and returns its value. |
| </p></dd></dl> |
| |
| <dl> |
| <dt><a name="index-_005f_005fbuiltin_005frx_005fmvtachi"></a>Built-in Function: <em>void</em> <strong>__builtin_rx_mvtachi</strong> <em>(int)</em></dt> |
| <dd><p>Generates the <code>mvtachi</code> machine instruction to set the top |
| 32 bits of the accumulator. |
| </p></dd></dl> |
| |
| <dl> |
| <dt><a name="index-_005f_005fbuiltin_005frx_005fmvtaclo"></a>Built-in Function: <em>void</em> <strong>__builtin_rx_mvtaclo</strong> <em>(int)</em></dt> |
| <dd><p>Generates the <code>mvtaclo</code> machine instruction to set the bottom |
| 32 bits of the accumulator. |
| </p></dd></dl> |
| |
| <dl> |
| <dt><a name="index-_005f_005fbuiltin_005frx_005fmvtc"></a>Built-in Function: <em>void</em> <strong>__builtin_rx_mvtc</strong> <em>(int reg, int val)</em></dt> |
| <dd><p>Generates the <code>mvtc</code> machine instruction which sets control |
| register number <code>reg</code> to <code>val</code>. |
| </p></dd></dl> |
| |
| <dl> |
| <dt><a name="index-_005f_005fbuiltin_005frx_005fmvtipl"></a>Built-in Function: <em>void</em> <strong>__builtin_rx_mvtipl</strong> <em>(int)</em></dt> |
| <dd><p>Generates the <code>mvtipl</code> machine instruction set the interrupt |
| priority level. |
| </p></dd></dl> |
| |
| <dl> |
| <dt><a name="index-_005f_005fbuiltin_005frx_005fracw"></a>Built-in Function: <em>void</em> <strong>__builtin_rx_racw</strong> <em>(int)</em></dt> |
| <dd><p>Generates the <code>racw</code> machine instruction to round the accumulator |
| according to the specified mode. |
| </p></dd></dl> |
| |
| <dl> |
| <dt><a name="index-_005f_005fbuiltin_005frx_005frevw"></a>Built-in Function: <em>int</em> <strong>__builtin_rx_revw</strong> <em>(int)</em></dt> |
| <dd><p>Generates the <code>revw</code> machine instruction which swaps the bytes in |
| the argument so that bits 0–7 now occupy bits 8–15 and vice versa, |
| and also bits 16–23 occupy bits 24–31 and vice versa. |
| </p></dd></dl> |
| |
| <dl> |
| <dt><a name="index-_005f_005fbuiltin_005frx_005frmpa"></a>Built-in Function: <em>void</em> <strong>__builtin_rx_rmpa</strong> <em>(void)</em></dt> |
| <dd><p>Generates the <code>rmpa</code> machine instruction which initiates a |
| repeated multiply and accumulate sequence. |
| </p></dd></dl> |
| |
| <dl> |
| <dt><a name="index-_005f_005fbuiltin_005frx_005fround"></a>Built-in Function: <em>void</em> <strong>__builtin_rx_round</strong> <em>(float)</em></dt> |
| <dd><p>Generates the <code>round</code> machine instruction which returns the |
| floating-point argument rounded according to the current rounding mode |
| set in the floating-point status word register. |
| </p></dd></dl> |
| |
| <dl> |
| <dt><a name="index-_005f_005fbuiltin_005frx_005fsat"></a>Built-in Function: <em>int</em> <strong>__builtin_rx_sat</strong> <em>(int)</em></dt> |
| <dd><p>Generates the <code>sat</code> machine instruction which returns the |
| saturated value of the argument. |
| </p></dd></dl> |
| |
| <dl> |
| <dt><a name="index-_005f_005fbuiltin_005frx_005fsetpsw"></a>Built-in Function: <em>void</em> <strong>__builtin_rx_setpsw</strong> <em>(int)</em></dt> |
| <dd><p>Generates the <code>setpsw</code> machine instruction to set the specified |
| bit in the processor status word. |
| </p></dd></dl> |
| |
| <dl> |
| <dt><a name="index-_005f_005fbuiltin_005frx_005fwait"></a>Built-in Function: <em>void</em> <strong>__builtin_rx_wait</strong> <em>(void)</em></dt> |
| <dd><p>Generates the <code>wait</code> machine instruction. |
| </p></dd></dl> |
| |
| <hr> |
| <div class="header"> |
| <p> |
| Next: <a href="S_002f390-System-z-Built_002din-Functions.html#S_002f390-System-z-Built_002din-Functions" accesskey="n" rel="next">S/390 System z Built-in Functions</a>, Previous: <a href="PowerPC-Hardware-Transactional-Memory-Built_002din-Functions.html#PowerPC-Hardware-Transactional-Memory-Built_002din-Functions" accesskey="p" rel="prev">PowerPC Hardware Transactional Memory Built-in Functions</a>, Up: <a href="Target-Builtins.html#Target-Builtins" accesskey="u" rel="up">Target Builtins</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Option-Index.html#Option-Index" title="Index" rel="index">Index</a>]</p> |
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