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diff --git a/docs/reference/asm_thumb2_arith.rst b/docs/reference/asm_thumb2_arith.rst deleted file mode 100644 index da4a68852..000000000 --- a/docs/reference/asm_thumb2_arith.rst +++ /dev/null @@ -1,50 +0,0 @@ -Arithmetic instructions -======================= - -Document conventions --------------------- - -Notation: ``Rd, Rm, Rn`` denote ARM registers R0-R7. ``immN`` denotes an immediate -value having a width of N bits e.g. ``imm8``, ``imm3``. ``carry`` denotes -the carry condition flag, ``not(carry)`` denotes its complement. In the case of instructions -with more than one register argument, it is permissible for some to be identical. For example -the following will add the contents of R0 to itself, placing the result in R0: - -* add(r0, r0, r0) - -Arithmetic instructions affect the condition flags except where stated. - -Addition --------- - -* add(Rdn, imm8) ``Rdn = Rdn + imm8`` -* add(Rd, Rn, imm3) ``Rd = Rn + imm3`` -* add(Rd, Rn, Rm) ``Rd = Rn +Rm`` -* adc(Rd, Rn) ``Rd = Rd + Rn + carry`` - -Subtraction ------------ - -* sub(Rdn, imm8) ``Rdn = Rdn - imm8`` -* sub(Rd, Rn, imm3) ``Rd = Rn - imm3`` -* sub(Rd, Rn, Rm) ``Rd = Rn - Rm`` -* sbc(Rd, Rn) ``Rd = Rd - Rn - not(carry)`` - -Negation --------- - -* neg(Rd, Rn) ``Rd = -Rn`` - -Multiplication and division ---------------------------- - -* mul(Rd, Rn) ``Rd = Rd * Rn`` - -This produces a 32 bit result with overflow lost. The result may be treated as -signed or unsigned according to the definition of the operands. - -* sdiv(Rd, Rn, Rm) ``Rd = Rn / Rm`` -* udiv(Rd, Rn, Rm) ``Rd = Rn / Rm`` - -These functions perform signed and unsigned division respectively. Condition flags -are not affected. |