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Download IBM PPC403GCX Embedded Controller User`s Manual
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rlwimi 1 Rotate Left Word Immediate then Mask Insert rlwimi Rotate Left Word Immediate then Mask Insert rlwimi rlwimi. RA,RS,SH,MB,ME RA,RS,SH,MB,ME 20 RS 0 6 2 (Rc=0) (Rc=1) RA 11 SH 16 MB ME 21 26 Rc 3 31 r ← ROTL((RS), SH) m ← MASK(MB, ME) (RA) ← (r ∧ m) ∨ ((RA) ∧ ¬m) 4 The contents of register RS are rotated left by the number of bit positions specified in the SH field. A mask is generated, having 1-bits starting at the bit position specified in the MB field and ending in the bit position specified by the ME field, with 0-bits elsewhere. If the starting point of the mask is at a higher bit position than the ending point, the 1-bits portion of the mask wraps from the highest bit position back around to the lowest. The rotated data is inserted into register RA, in positions corresponding to the bit positions in the mask that contain a 1-bit. Registers Altered 5 6 7 8 • RA • CR[CR0]LT, GT, EQ, SO if Rc contains 1 9 Architecture Note This instruction is part of the PowerPC User Instruction Set Architecture. 10 Table 11-25. Extended Mnemonics for rlwimi, rlwimi. Mnemonic inslwi Operands RA, RS, n, b Function Extended mnemonic for rlwimi. RA,RS,32−b,b,b+n−1 RA, RS, n, b 12 Insert from left immediate. (n > 0) (RA)b:b+n−1 ← (RS)0:n−1 Extended mnemonic for rlwimi RA,RS,32−b,b,b+n−1 inslwi. insrwi 11 Other Registers Changed 13 CR[CR0] A Insert from right immediate. (n > 0) (RA)b:b+n−1 ← (RS)32−n:31 Extended mnemonic for rlwimi RA,RS,32−b−n,b,b+n−1 Extended mnemonic for rlwimi. RA,RS,32−b−n,b,b+n−1 insrwi. B CR[CR0] C Ver 0.04, 5/07/97 Preliminary Instruction Set 11-129 I
