From 86f4e10cb03af034eb436dce24d79c16a5aade08 Mon Sep 17 00:00:00 2001 From: Rob Landley Date: Mon, 2 Mar 2020 14:52:16 -0600 Subject: Update the LP64 section. --- www/design.html | 22 +++++++++++++++++----- 1 file changed, 17 insertions(+), 5 deletions(-) diff --git a/www/design.html b/www/design.html index b2595fd4..e6519135 100644 --- a/www/design.html +++ b/www/design.html @@ -351,13 +351,25 @@ are always the same size (on both 32 and 64 bit). Pointer and int are _not_ the same size on 64 bit systems, but pointer and long are. This is guaranteed by the LP64 memory model, a Unix standard (which Linux and MacOS X both implement, and which modern 64 bit processors such as -x86-64 were designed for). See -the LP64 standard and -the LP64 -rationale for details.

+x86-64 were designed for).

+ +

Back +before unix.org went down, they hosted the +LP64 standard and +the LP64 rationale, but the important part is +LP64 gives all the basic C integer types defined sizes:

+ + + + + + + + +
C type32 bit
sizeof		64 bit
sizeof
char1 byte1 byte
short2 bytes2 bytes
int4 bytes4 bytes
long4 bytes8 bytes
long long8 bytes8 bytes

Note that Windows doesn't work like this, and I don't care. -The +The insane legacy reasons why this is broken on Windows are explained here.

Signedness of char

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