no more IEEE tricks

This commit is contained in:
Roberto Ierusalimschy 2013-05-26 10:26:34 -03:00
parent e2c8c756ee
commit d46ed54646
1 changed files with 1 additions and 69 deletions

View File

@ -1,5 +1,5 @@
/*
** $Id: luaconf.h,v 1.178 2013/04/26 13:08:29 roberto Exp roberto $
** $Id: luaconf.h,v 1.179 2013/04/29 17:12:12 roberto Exp roberto $
** Configuration file for Lua
** See Copyright Notice in lua.h
*/
@ -479,74 +479,6 @@
#define lua_integer2str(s,n) sprintf((s), LUA_INTEGER_FMT, (n))
#define LUA_MAXINTEGER2STR 32
/*
** Some tricks with doubles
*/
#if defined(LUA_NUMBER_DOUBLE) && !defined(LUA_ANSI) && 0 /* { */
/*
** The next definitions activate some tricks to speed up the
** conversion from doubles to integer types, mainly to LUA_UNSIGNED.
**
@@ LUA_MSASMTRICK uses Microsoft assembler to avoid clashes with a
** DirectX idiosyncrasy.
**
@@ LUA_IEEE754TRICK uses a trick that should work on any machine
** using IEEE754 with a 32-bit integer type.
**
@@ LUA_IEEELL extends the trick to LUA_INTEGER; should only be
** defined when LUA_INTEGER is a 32-bit integer.
**
@@ LUA_IEEEENDIAN is the endianness of doubles in your machine
** (0 for little endian, 1 for big endian); if not defined, Lua will
** check it dynamically for LUA_IEEE754TRICK (but not for LUA_NANTRICK).
**
@@ LUA_NANTRICK controls the use of a trick to pack all types into
** a single double value, using NaN values to represent non-number
** values. The trick only works on 32-bit machines (ints and pointers
** are 32-bit values) with numbers represented as IEEE 754-2008 doubles
** with conventional endianess (12345678 or 87654321), in CPUs that do
** not produce signaling NaN values (all NaNs are quiet).
*/
/* Microsoft compiler on a Pentium (32 bit) ? */
#if defined(LUA_WIN) && defined(_MSC_VER) && defined(_M_IX86) /* { */
#define LUA_MSASMTRICK
#define LUA_IEEEENDIAN 0
#define LUA_NANTRICK
/* pentium 32 bits? */
#elif defined(__i386__) || defined(__i386) || defined(__X86__) /* }{ */
#define LUA_IEEE754TRICK
#define LUA_IEEELL
#define LUA_IEEEENDIAN 0
#define LUA_NANTRICK
/* pentium 64 bits? */
#elif defined(__x86_64) /* }{ */
#define LUA_IEEE754TRICK
#define LUA_IEEEENDIAN 0
#elif defined(__POWERPC__) || defined(__ppc__) /* }{ */
#define LUA_IEEE754TRICK
#define LUA_IEEEENDIAN 1
#else /* }{ */
/* assume IEEE754 and a 32-bit integer type */
#define LUA_IEEE754TRICK
#endif /* } */
#endif /* } */
/* }================================================================== */