Lines Matching +full:cpu +full:- +full:offset

1 .\" Copyright (c) 2016-2017 The FreeBSD Foundation.
32 .Nd Architecture-specific details
34 Differences between CPU architectures and platforms supported by
40 For full details consult the processor-specific ABI supplement
83 This table shows currently supported CPU architectures along with the first
86 .Bl -column -offset indent "Architecture" "Initial Release"
100 .Bl -column -offset indent "Architecture" "Initial Release" "Final Release"
128 .Bl -tag -width "Dv ILP32"
133 types machine representations all have 4-byte size.
147 Typically these are 64-bit machines, where the
153 environment, which was the historical 32-bit predecessor for 64-bit evolution.
155 .Bl -column -offset indent "powerpc64" "ILP32 counterpart"
165 binaries if the CPU implements
171 .Bl -column -offset indent "long long" "Size"
186 require only 4-byte alignment for 64-bit integers.
188 Machine-dependent type sizes:
189 .Bl -column -offset indent "Architecture" "void *" "long double" "time_t"
205 .Bl -column -offset indent "Architecture" "Endianness" "char Signedness"
218 .Bl -column -offset indent "Architecture" "Page Sizes"
231 .Bl -column -offset indent "Architecture" "float, double" "long double"
247 as the default compiler on all supported CPU architectures,
266 .Bl -column -offset indent "Dv MACHINE" "Dv MACHINE_CPUARCH" "Dv MACHINE_ARCH"
277 Some of these provide architecture-specific details and are explained below.
282 .Bd -literal -offset indent
283 cc -x c -dM -E /dev/null
287 .Bl -column -offset indent "BYTE_ORDER" "Meaning"
289 .It Dv __LP64__ Ta 64-bit (8-byte) long and pointer, 32-bit (4-byte) int
290 .It Dv __ILP32__ Ta 32-bit (4-byte) int, long and pointer
297 Architecture-specific macros:
298 .Bl -column -offset indent "Architecture" "Predefined macros"
311 Compilers may define additional variants of architecture-specific macros.
320 .Bl -tag -width "MACHINE_CPUARCH"
330 Each CPU architecture may have multiple hardware platforms it supports
339 just as one CPU architecture can be implemented by many different
340 hardware platforms, one hardware platform may support multiple CPU
344 of i386 supported the IBM-AT hardware platform while the
346 of pc98 supported the Japanese company NEC's PC-9801 and PC-9821
358 Represents the CPU processor architecture.
363 It defines the CPU instruction family supported.
364 It may also encode a variation in the byte ordering of multi-byte
374 Generally, the plain CPU name specifies the most common (or at least
375 first) variant of the CPU.
378 If we ever were to support the so-called x32 ABI (using 32-bit
380 as amd64-x32.
381 It is unfortunate that amd64 specifies the 64-bit evolution of the x86 platform
406 It is used to optimize the build for a specific CPU / core that the