[AMDGPU][MC][DOC] Updated AMD GPU assembler description

Stage 2: added detailed description of operands

See bug 36572: https://bugs.llvm.org/show_bug.cgi?id=36572

llvm-svn: 349368
diff --git a/llvm/docs/AMDGPU/gfx7_src32_2.rst b/llvm/docs/AMDGPU/gfx7_src32_2.rst
new file mode 100644
index 0000000..b939c45
--- /dev/null
+++ b/llvm/docs/AMDGPU/gfx7_src32_2.rst
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+..
+    **************************************************
+    *                                                *
+    *   Automatically generated file, do not edit!   *
+    *                                                *
+    **************************************************
+
+.. _amdgpu_synid7_src32_2:
+
+src
+===========================
+
+Instruction input.
+
+*Size:* 1 dword.
+
+*Operands:* :ref:`v<amdgpu_synid_v>`, :ref:`s<amdgpu_synid_s>`, :ref:`flat_scratch<amdgpu_synid_flat_scratch>`, :ref:`vcc<amdgpu_synid_vcc>`, :ref:`trap<amdgpu_synid_trap>`, :ref:`m0<amdgpu_synid_m0>`, :ref:`exec<amdgpu_synid_exec>`, :ref:`constant<amdgpu_synid_constant>`