IBM POWER2 processors
Introduction: September 1993
The model 7013-590 (66MHz) was announced in September 1993 and was the first RS/6000 based on the 32-bit POWER2 architecture. The most significant improvement introduced with the POWER2 architecture for scientific and technical applications is that the floating-point unit (FPU) contains two 64-bit execution units, so that two floating-point multiply-add instructions may be executed each cycle. A second fixed-point execution unit is also provided. In addition, several new hardware instructions were introduced with POWER2: quad-word storage instructions, hardware square root instruction and floating-point to integer conversion instructions.
Initial models: 7013-58H (55MHz), 7013-590 (66MHz), 7015-990 (71.5MHz).