The Motorola 68060 ("sixty-eight-oh-sixty") is a 32-bit microprocessor from Motorola released in 1994. It is the successor to the Motorola 68040 and is the highest performing member of the 68000 series. Two derivatives were produced, the 68LC060 and the 68EC060.
There is an LC (Low-Cost) version, without an FPU and EC (Embedded Controller), without MMU and FPU. The 68060 design was led by Joe Circello.
The 68060 shares most architectural features with the P5 Pentium. Both have a very similar superscalar in-order dual instruction pipeline configuration, and an instruction decoder which breaks down complex instructions into simpler ones before execution. However, a significant difference is that the 68060 FPU is not pipelined and is therefore up to three times slower than the Pentium in floating point applications. In contrast to that, integer multiplications and bit shifting instructions are significantly faster on the 68060. The 68060 has the ability to execute simple instructions in the address generation unit (AGU) and thereby supply the result two cycles before the ALU. In the development of the 68060, large amounts of commercial compiled code were analyzed for clues as to which instructions would be the best candidates for performance optimization.
Against the Pentium, the 68060 can perform better on mixed code; Pentium's decoder cannot issue an FP instruction every opportunity and hence the FPU is not superscalar as the ALUs were. If the 68060's non-pipelined FPU can accept an instruction, it can be issued one by the decoder. This means that optimizing for the 68060 is easier: no rules prevent FP instructions from being issued whenever was convenient for the programmer other than well understood instruction latencies. However, with properly optimized and scheduled code, the Pentium's FPU is capable of double the clock for clock throughput of the 68060's FPU.
The 68060 is the last development of the 68000 family for general purpose use, abandoned in favor of the PowerPC chips.
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The Motorola 68000 series (also known as 680x0, m68000, m68k, or 68k) is a family of 32-bit complex instruction set computer (CISC) microprocessors. During the 1980s and early 1990s, they were popular in personal computers and workstations and were the primary competitors of Intel's x86 microprocessors.
The Motorola 68030 ("sixty-eight-oh-thirty") is a 32-bit microprocessor in the Motorola 68000 family. It was released in 1987. The 68030 was the successor to the Motorola 68020, and was followed by the Motorola 68040. In keeping with general Motorola naming, this CPU is often referred to as the 030 (pronounced oh-three-oh or oh-thirty). The 68030 is essentially a 68020 with a memory management unit (MMU) and instruction and data caches of 256 bytes each.
The Motorola 68060 ("sixty-eight-oh-sixty") is a 32-bit microprocessor from Motorola released in 1994. It is the successor to the Motorola 68040 and is the highest performing member of the 68000 series. Two derivatives were produced, the 68LC060 and the 68EC060. There is an LC (Low-Cost) version, without an FPU and EC (Embedded Controller), without MMU and FPU. The 68060 design was led by Joe Circello. The 68060 shares most architectural features with the P5 Pentium.
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