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| <title>Using the GNU Compiler Collection (GCC): ARC SIMD Built-in Functions</title> |
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| <a name="ARC-SIMD-Built_002din-Functions-1"></a> |
| <h4 class="subsection">6.57.5 ARC SIMD Built-in Functions</h4> |
| |
| <p>SIMD builtins provided by the compiler can be used to generate the |
| vector instructions. This section describes the available builtins |
| and their usage in programs. With the <samp>-msimd</samp> option, the |
| compiler provides 128-bit vector types, which can be specified using |
| the <code>vector_size</code> attribute. The header file <samp>arc-simd.h</samp> |
| can be included to use the following predefined types: |
| </p><div class="example"> |
| <pre class="example">typedef int __v4si __attribute__((vector_size(16))); |
| typedef short __v8hi __attribute__((vector_size(16))); |
| </pre></div> |
| |
| <p>These types can be used to define 128-bit variables. The built-in |
| functions listed in the following section can be used on these |
| variables to generate the vector operations. |
| </p> |
| <p>For all builtins, <code>__builtin_arc_<var>someinsn</var></code>, the header file |
| <samp>arc-simd.h</samp> also provides equivalent macros called |
| <code>_<var>someinsn</var></code> that can be used for programming ease and |
| improved readability. The following macros for DMA control are also |
| provided: |
| </p><div class="example"> |
| <pre class="example">#define _setup_dma_in_channel_reg _vdiwr |
| #define _setup_dma_out_channel_reg _vdowr |
| </pre></div> |
| |
| <p>The following is a complete list of all the SIMD built-ins provided |
| for ARC, grouped by calling signature. |
| </p> |
| <p>The following take two <code>__v8hi</code> arguments and return a |
| <code>__v8hi</code> result: |
| </p><div class="example"> |
| <pre class="example">__v8hi __builtin_arc_vaddaw (__v8hi, __v8hi) |
| __v8hi __builtin_arc_vaddw (__v8hi, __v8hi) |
| __v8hi __builtin_arc_vand (__v8hi, __v8hi) |
| __v8hi __builtin_arc_vandaw (__v8hi, __v8hi) |
| __v8hi __builtin_arc_vavb (__v8hi, __v8hi) |
| __v8hi __builtin_arc_vavrb (__v8hi, __v8hi) |
| __v8hi __builtin_arc_vbic (__v8hi, __v8hi) |
| __v8hi __builtin_arc_vbicaw (__v8hi, __v8hi) |
| __v8hi __builtin_arc_vdifaw (__v8hi, __v8hi) |
| __v8hi __builtin_arc_vdifw (__v8hi, __v8hi) |
| __v8hi __builtin_arc_veqw (__v8hi, __v8hi) |
| __v8hi __builtin_arc_vh264f (__v8hi, __v8hi) |
| __v8hi __builtin_arc_vh264ft (__v8hi, __v8hi) |
| __v8hi __builtin_arc_vh264fw (__v8hi, __v8hi) |
| __v8hi __builtin_arc_vlew (__v8hi, __v8hi) |
| __v8hi __builtin_arc_vltw (__v8hi, __v8hi) |
| __v8hi __builtin_arc_vmaxaw (__v8hi, __v8hi) |
| __v8hi __builtin_arc_vmaxw (__v8hi, __v8hi) |
| __v8hi __builtin_arc_vminaw (__v8hi, __v8hi) |
| __v8hi __builtin_arc_vminw (__v8hi, __v8hi) |
| __v8hi __builtin_arc_vmr1aw (__v8hi, __v8hi) |
| __v8hi __builtin_arc_vmr1w (__v8hi, __v8hi) |
| __v8hi __builtin_arc_vmr2aw (__v8hi, __v8hi) |
| __v8hi __builtin_arc_vmr2w (__v8hi, __v8hi) |
| __v8hi __builtin_arc_vmr3aw (__v8hi, __v8hi) |
| __v8hi __builtin_arc_vmr3w (__v8hi, __v8hi) |
| __v8hi __builtin_arc_vmr4aw (__v8hi, __v8hi) |
| __v8hi __builtin_arc_vmr4w (__v8hi, __v8hi) |
| __v8hi __builtin_arc_vmr5aw (__v8hi, __v8hi) |
| __v8hi __builtin_arc_vmr5w (__v8hi, __v8hi) |
| __v8hi __builtin_arc_vmr6aw (__v8hi, __v8hi) |
| __v8hi __builtin_arc_vmr6w (__v8hi, __v8hi) |
| __v8hi __builtin_arc_vmr7aw (__v8hi, __v8hi) |
| __v8hi __builtin_arc_vmr7w (__v8hi, __v8hi) |
| __v8hi __builtin_arc_vmrb (__v8hi, __v8hi) |
| __v8hi __builtin_arc_vmulaw (__v8hi, __v8hi) |
| __v8hi __builtin_arc_vmulfaw (__v8hi, __v8hi) |
| __v8hi __builtin_arc_vmulfw (__v8hi, __v8hi) |
| __v8hi __builtin_arc_vmulw (__v8hi, __v8hi) |
| __v8hi __builtin_arc_vnew (__v8hi, __v8hi) |
| __v8hi __builtin_arc_vor (__v8hi, __v8hi) |
| __v8hi __builtin_arc_vsubaw (__v8hi, __v8hi) |
| __v8hi __builtin_arc_vsubw (__v8hi, __v8hi) |
| __v8hi __builtin_arc_vsummw (__v8hi, __v8hi) |
| __v8hi __builtin_arc_vvc1f (__v8hi, __v8hi) |
| __v8hi __builtin_arc_vvc1ft (__v8hi, __v8hi) |
| __v8hi __builtin_arc_vxor (__v8hi, __v8hi) |
| __v8hi __builtin_arc_vxoraw (__v8hi, __v8hi) |
| </pre></div> |
| |
| <p>The following take one <code>__v8hi</code> and one <code>int</code> argument and return a |
| <code>__v8hi</code> result: |
| </p> |
| <div class="example"> |
| <pre class="example">__v8hi __builtin_arc_vbaddw (__v8hi, int) |
| __v8hi __builtin_arc_vbmaxw (__v8hi, int) |
| __v8hi __builtin_arc_vbminw (__v8hi, int) |
| __v8hi __builtin_arc_vbmulaw (__v8hi, int) |
| __v8hi __builtin_arc_vbmulfw (__v8hi, int) |
| __v8hi __builtin_arc_vbmulw (__v8hi, int) |
| __v8hi __builtin_arc_vbrsubw (__v8hi, int) |
| __v8hi __builtin_arc_vbsubw (__v8hi, int) |
| </pre></div> |
| |
| <p>The following take one <code>__v8hi</code> argument and one <code>int</code> argument which |
| must be a 3-bit compile time constant indicating a register number |
| I0-I7. They return a <code>__v8hi</code> result. |
| </p><div class="example"> |
| <pre class="example">__v8hi __builtin_arc_vasrw (__v8hi, const int) |
| __v8hi __builtin_arc_vsr8 (__v8hi, const int) |
| __v8hi __builtin_arc_vsr8aw (__v8hi, const int) |
| </pre></div> |
| |
| <p>The following take one <code>__v8hi</code> argument and one <code>int</code> |
| argument which must be a 6-bit compile time constant. They return a |
| <code>__v8hi</code> result. |
| </p><div class="example"> |
| <pre class="example">__v8hi __builtin_arc_vasrpwbi (__v8hi, const int) |
| __v8hi __builtin_arc_vasrrpwbi (__v8hi, const int) |
| __v8hi __builtin_arc_vasrrwi (__v8hi, const int) |
| __v8hi __builtin_arc_vasrsrwi (__v8hi, const int) |
| __v8hi __builtin_arc_vasrwi (__v8hi, const int) |
| __v8hi __builtin_arc_vsr8awi (__v8hi, const int) |
| __v8hi __builtin_arc_vsr8i (__v8hi, const int) |
| </pre></div> |
| |
| <p>The following take one <code>__v8hi</code> argument and one <code>int</code> argument which |
| must be a 8-bit compile time constant. They return a <code>__v8hi</code> |
| result. |
| </p><div class="example"> |
| <pre class="example">__v8hi __builtin_arc_vd6tapf (__v8hi, const int) |
| __v8hi __builtin_arc_vmvaw (__v8hi, const int) |
| __v8hi __builtin_arc_vmvw (__v8hi, const int) |
| __v8hi __builtin_arc_vmvzw (__v8hi, const int) |
| </pre></div> |
| |
| <p>The following take two <code>int</code> arguments, the second of which which |
| must be a 8-bit compile time constant. They return a <code>__v8hi</code> |
| result: |
| </p><div class="example"> |
| <pre class="example">__v8hi __builtin_arc_vmovaw (int, const int) |
| __v8hi __builtin_arc_vmovw (int, const int) |
| __v8hi __builtin_arc_vmovzw (int, const int) |
| </pre></div> |
| |
| <p>The following take a single <code>__v8hi</code> argument and return a |
| <code>__v8hi</code> result: |
| </p><div class="example"> |
| <pre class="example">__v8hi __builtin_arc_vabsaw (__v8hi) |
| __v8hi __builtin_arc_vabsw (__v8hi) |
| __v8hi __builtin_arc_vaddsuw (__v8hi) |
| __v8hi __builtin_arc_vexch1 (__v8hi) |
| __v8hi __builtin_arc_vexch2 (__v8hi) |
| __v8hi __builtin_arc_vexch4 (__v8hi) |
| __v8hi __builtin_arc_vsignw (__v8hi) |
| __v8hi __builtin_arc_vupbaw (__v8hi) |
| __v8hi __builtin_arc_vupbw (__v8hi) |
| __v8hi __builtin_arc_vupsbaw (__v8hi) |
| __v8hi __builtin_arc_vupsbw (__v8hi) |
| </pre></div> |
| |
| <p>The followign take two <code>int</code> arguments and return no result: |
| </p><div class="example"> |
| <pre class="example">void __builtin_arc_vdirun (int, int) |
| void __builtin_arc_vdorun (int, int) |
| </pre></div> |
| |
| <p>The following take two <code>int</code> arguments and return no result. The |
| first argument must a 3-bit compile time constant indicating one of |
| the DR0-DR7 DMA setup channels: |
| </p><div class="example"> |
| <pre class="example">void __builtin_arc_vdiwr (const int, int) |
| void __builtin_arc_vdowr (const int, int) |
| </pre></div> |
| |
| <p>The following take an <code>int</code> argument and return no result: |
| </p><div class="example"> |
| <pre class="example">void __builtin_arc_vendrec (int) |
| void __builtin_arc_vrec (int) |
| void __builtin_arc_vrecrun (int) |
| void __builtin_arc_vrun (int) |
| </pre></div> |
| |
| <p>The following take a <code>__v8hi</code> argument and two <code>int</code> |
| arguments and return a <code>__v8hi</code> result. The second argument must |
| be a 3-bit compile time constants, indicating one the registers I0-I7, |
| and the third argument must be an 8-bit compile time constant. |
| </p> |
| <p><em>Note:</em> Although the equivalent hardware instructions do not take |
| an SIMD register as an operand, these builtins overwrite the relevant |
| bits of the <code>__v8hi</code> register provided as the first argument with |
| the value loaded from the <code>[Ib, u8]</code> location in the SDM. |
| </p> |
| <div class="example"> |
| <pre class="example">__v8hi __builtin_arc_vld32 (__v8hi, const int, const int) |
| __v8hi __builtin_arc_vld32wh (__v8hi, const int, const int) |
| __v8hi __builtin_arc_vld32wl (__v8hi, const int, const int) |
| __v8hi __builtin_arc_vld64 (__v8hi, const int, const int) |
| </pre></div> |
| |
| <p>The following take two <code>int</code> arguments and return a <code>__v8hi</code> |
| result. The first argument must be a 3-bit compile time constants, |
| indicating one the registers I0-I7, and the second argument must be an |
| 8-bit compile time constant. |
| </p> |
| <div class="example"> |
| <pre class="example">__v8hi __builtin_arc_vld128 (const int, const int) |
| __v8hi __builtin_arc_vld64w (const int, const int) |
| </pre></div> |
| |
| <p>The following take a <code>__v8hi</code> argument and two <code>int</code> |
| arguments and return no result. The second argument must be a 3-bit |
| compile time constants, indicating one the registers I0-I7, and the |
| third argument must be an 8-bit compile time constant. |
| </p> |
| <div class="example"> |
| <pre class="example">void __builtin_arc_vst128 (__v8hi, const int, const int) |
| void __builtin_arc_vst64 (__v8hi, const int, const int) |
| </pre></div> |
| |
| <p>The following take a <code>__v8hi</code> argument and three <code>int</code> |
| arguments and return no result. The second argument must be a 3-bit |
| compile-time constant, identifying the 16-bit sub-register to be |
| stored, the third argument must be a 3-bit compile time constants, |
| indicating one the registers I0-I7, and the fourth argument must be an |
| 8-bit compile time constant. |
| </p> |
| <div class="example"> |
| <pre class="example">void __builtin_arc_vst16_n (__v8hi, const int, const int, const int) |
| void __builtin_arc_vst32_n (__v8hi, const int, const int, const int) |
| </pre></div> |
| |
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