micropython: add micropython component

components/language/micropython/docs/reference/asm_thumb2_mov.rst

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+Register move instructions
+==========================
+
+Document conventions
+--------------------
+
+Notation: ``Rd, Rn`` denote ARM registers R0-R15. ``immN`` denotes an immediate
+value having a width of N bits. These instructions affect the condition flags.
+
+Register moves
+--------------
+
+Where immediate values are used, these are zero-extended to 32 bits. Thus
+``mov(R0, 0xff)`` will set R0 to 255.
+
+* mov(Rd, imm8) ``Rd = imm8``
+* mov(Rd, Rn) ``Rd = Rn``
+* movw(Rd, imm16) ``Rd = imm16``
+* movt(Rd, imm16) ``Rd = (Rd & 0xffff) | (imm16 << 16)``
+
+movt writes an immediate value to the top halfword of the destination register.
+It does not affect the contents of the bottom halfword.
+
+* movwt(Rd, imm32) ``Rd = imm32``
+
+movwt is a pseudo-instruction: the MicroPython assembler emits a ``movw`` followed
+by a ``movt`` to move a 32-bit value into Rd.