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authorDan Halbert <halbert@halwitz.org>2018-02-27 22:03:52 -0500
committerGitHub <noreply@github.com>2018-02-27 22:03:52 -0500
commit568c04e6afa8016062f685b2198c0209f62827f4 (patch)
treed07b76119f715add462983b335797adf64b61249 /docs/reference/asm_thumb2_str.rst
parent6a2379fd0bfe10017d8abc5c36ef1d470c0d9b27 (diff)
parentea633117d01d94e8d56ed94344e4b3e46b4eef03 (diff)
Merge pull request #650 from tannewt/merge_2x3.0.0-alpha.2
Merge in commits from 2.x branch.
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-Store register to memory
-========================
-
-Document conventions
---------------------
-
-Notation: ``Rt, Rn`` denote ARM registers R0-R7 except where stated. ``immN`` represents an immediate
-value having a width of N bits hence ``imm5`` is constrained to the range 0-31. ``[Rn + imm5]`` is the
-contents of the memory address obtained by adding Rn and the offset ``imm5``. Offsets are measured in
-bytes. These instructions do not affect the condition flags.
-
-Register Store
---------------
-
-* str(Rt, [Rn, imm7]) ``[Rn + imm7] = Rt`` Store a 32 bit word
-* strb(Rt, [Rn, imm5]) ``[Rn + imm5] = Rt`` Store a byte (b0-b7)
-* strh(Rt, [Rn, imm6]) ``[Rn + imm6] = Rt`` Store a 16 bit half word (b0-b15)
-
-The specified immediate offsets are measured in bytes. Hence in the case of ``str`` the 7 bit value
-enables 32 bit word aligned values to be accessed with a maximum offset of 31 words. In the case of ``strh`` the
-6 bit value enables 16 bit half-word aligned values to be accessed with a maximum offset of 31 half-words.