x86-64, by specification, offers legacy operating modes that operate on the IA-32 ISA for backwards compatibility. In the modern era, Intel still produces IA-32 processors under the Intel Quark microcontroller platform however, since the 2000s, the majority of manufacturers (Intel included) moved almost exclusively to implementing CPUs based on the 64-bit variant of x86, x86-64. During the 1990s, VIA, Transmeta and other chip manufacturers also produced IA-32 compatible processors (e.g. Intel was historically the largest manufacturer of IA-32 processors, with the second biggest supplier having been AMD. floating-point capabilities and the MMX extensions. These updates offered numerous additions alongside the base IA-32 set, i.e. In some other contexts, certain iterations of the IA-32 ISA are sometimes labelled i486, i586 and i686, referring to the instruction supersets offered by the 80486, the P5 and the P6 microarchitectures respectively. Within various programming language directives, IA-32 is still sometimes referred to as the "i386" architecture. IA-32 is the first incarnation of x86 that supports 32-bit computing as a result, the "IA-32" term may be used as a metonym to refer to all x86 versions that support 32-bit computing. IA-32 (short for " Intel Architecture, 32-bit", sometimes also called i386 ) is the 32-bit version of the x86 instruction set architecture, designed by Intel and first implemented in the 80386 microprocessor in 1985. For the x86 architecture in general, see x86.
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