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SMV320C6727BHFHM Datasheet(PDF) 8 Page - Texas Instruments |
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SMV320C6727BHFHM Datasheet(HTML) 8 Page - Texas Instruments |
8 / 112 page .D1 .M1 .S1 .L1 Register File A Data Path A Cross Paths .D2 .M2 .S2 .L2 Register File B Data Path B SMV320C6727B-SP SPRS675G – FEBRUARY 2013 – REVISED JANUARY 2014 www.ti.com The CPU features two data paths, shown in Figure 2-1, each composed of four functional units (.D, .M, .S, and .L) and a register file. The .D unit in each data path is a data-addressing unit that is responsible for all data transfers between the register files and the memory. The .M functional units are dedicated for multiplies, and the .S and .L functional units perform a general set of arithmetic, logical, and branch functions. All instructions operate on registers as opposed to data in memory, but results stored in the 32-bit registers can be subsequently moved to memory as bytes, half-words, or words. Figure 2-1. CPU Data Paths The register file in each data path contains 32 32-bit registers for a total of 64 general-purpose registers. This doubles the number of registers found on the C67x CPU core, allowing the optimizing C compiler to pipeline more complex loops by decreasing register pressure significantly. The four functional units in each data path of the CPU can freely share the 32 registers belonging to that data path. Each data path also features a single cross path connected to the register file on the opposing data path. This allows each data path to source one cross-path operand per cycle from the opposing register file. On the C67x+ CPU, this single cross-path operand can be used by two functional units per cycle, an improvement over the C67x CPU in which only one functional unit could use the cross-path operand. In addition, the cross-path register read(s) are not counted as part of the limit of four reads of the same register in a single cycle. The C67x+ CPU executes all C67x instructions plus new floating-point instructions to improve performance specifically during processing. These new instructions are listed in Table 2-2. 8 Device Overview Copyright © 2013–2014, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Links: SMV320C6727B-SP |
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