5 This directory contains mpn functions for various 80x86 chips.
10 x86 i386, i486, generic
11 x86/pentium Intel Pentium (P5, P54)
12 x86/pentium/mmx Intel Pentium with MMX (P55)
13 x86/p6 Intel Pentium Pro
14 x86/p6/mmx Intel Pentium II, III
15 x86/p6/p3mmx Intel Pentium III
16 x86/k6 AMD K6, K6-2, K6-3
18 x86/k6/k62mmx AMD K6-2
23 The x86 directory is also the main support for P6 at the moment, and
24 is something of a blended style, meant to be reasonable on all x86s.
30 The code is well-optimized for AMD and Intel chips, but not so well
31 optimized for Cyrix chips.
35 RELEVANT OPTIMIZATION ISSUES
37 For implementations with slow double shift instructions (SHLD and
38 SHRD), it might be better to mimic their operation with SHL+SHR+OR.
39 (M2 is likely to benefit from that, but not Pentium due to its slow