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Back out _fast optimization that wasn't. (Ken Hagan)

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[SVN r7848]
This commit is contained in:
Beman Dawes
2000-09-26 18:22:26 +00:00
parent 79accb0546
commit d0b9d43e9b
1 changed files with 10 additions and 7 deletions
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17
include/boost/stdint.h
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@ -1,4 +1,4 @@
// boost stdint.h header file ---------------------------------------------// // boost stdint.h header file ----------------------------------------------//
// (C) Copyright boost.org 1999. Permission to copy, use, modify, sell // (C) Copyright boost.org 1999. Permission to copy, use, modify, sell
// and distribute this software is granted provided this copyright // and distribute this software is granted provided this copyright
@ -31,18 +31,21 @@
// These are fairly safe guesses for some 16-bit, and most 32-bit and 64-bit // These are fairly safe guesses for some 16-bit, and most 32-bit and 64-bit
// platforms. For other systems, they will have to be hand tailored. // platforms. For other systems, they will have to be hand tailored.
// It may also be possible to hand tailor a more efficient implementation //
// if the asumptions below about fast type are not correct of your processor. // Because the fast types are assumed to be the same as the undecorated types,
// it may be possible to hand tailor a more efficient implementation. Such
// an optimization may be illusionary; on the Intel x86-family 386 on, for
// example, byte arithmetic and load/stores are as fast as "int" sized ones.
// 8-bit types -------------------------------------------------------------// // 8-bit types -------------------------------------------------------------//
# if UCHAR_MAX == 0xff # if UCHAR_MAX == 0xff
typedef signed char int8_t; typedef signed char int8_t;
typedef signed char int_least8_t; typedef signed char int_least8_t;
typedef int int_fast8_t; // assume int faster than char typedef signed char int_fast8_t;
typedef unsigned char uint8_t; typedef unsigned char uint8_t;
typedef unsigned char uint_least8_t; typedef unsigned char uint_least8_t;
typedef unsigned int uint_fast8_t; // assume int faster than char typedef unsigned char uint_fast8_t;
# else # else
# error defaults not correct; you must hand modify boost/stdint.h # error defaults not correct; you must hand modify boost/stdint.h
# endif # endif
@ -52,10 +55,10 @@
# if USHRT_MAX == 0xffff # if USHRT_MAX == 0xffff
typedef short int16_t; typedef short int16_t;
typedef short int_least16_t; typedef short int_least16_t;
typedef int int_fast16_t; // assume int faster than short typedef short int_fast16_t;
typedef unsigned short uint16_t; typedef unsigned short uint16_t;
typedef unsigned short uint_least16_t; typedef unsigned short uint_least16_t;
typedef unsigned int uint_fast16_t; // assume int faster than short typedef unsigned short uint_fast16_t;
# else # else
# error defaults not correct; you must hand modify boost/stdint.h # error defaults not correct; you must hand modify boost/stdint.h
# endif # endif