Floating-point architectures (continued)

Multiply-add/subtract: form exact double-width product, then add with single rounding (HP PA-RISC, HP/Intel IA-64, IBM Power (first, in 1990), SGI/MIPS MIPS-IV (R5000, R8000, R10000, R12000), but not Compaq/DEC Alpha, Intel x86, Java Virtual Machine, or Sun SPARC)

Multiply-add/subtract: form exact double-width product, then add with single rounding (HP PA-RISC, HP/Intel IA-64, IBM Power (first, in 1990), SGI/MIPS MIPS-IV (R5000, R8000, R10000, R12000), but not Compaq/DEC Alpha, Intel x86, Java Virtual Machine, or Sun SPARC)