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Added comment on floating point precision compile option for MSVC. (CVS 5448)

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FossilOrigin-Name: e20f2b8c6a13aa826703441cf340d0ee03bf9f64
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shane
2008-07-22 05:15:52 +00:00
parent dfb7b37dc0
commit 791ea93f68
3 changed files with 17 additions and 9 deletions
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manifest
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@@ -1,5 +1,5 @@
C Add\sassertion\scheck\sfor\sNaN\ssupport\sat\sstartup.\s(CVS\s5447) C Added\scomment\son\sfloating\spoint\sprecision\scompile\soption\sfor\sMSVC.\s(CVS\s5448)
D 2008-07-22T05:13:30 D 2008-07-22T05:15:53
F Makefile.arm-wince-mingw32ce-gcc fcd5e9cd67fe88836360bb4f9ef4cb7f8e2fb5a0 F Makefile.arm-wince-mingw32ce-gcc fcd5e9cd67fe88836360bb4f9ef4cb7f8e2fb5a0
F Makefile.in 77ff156061bb870aa0a8b3d545c670d08070f7e6 F Makefile.in 77ff156061bb870aa0a8b3d545c670d08070f7e6
F Makefile.linux-gcc d53183f4aa6a9192d249731c90dbdffbd2c68654 F Makefile.linux-gcc d53183f4aa6a9192d249731c90dbdffbd2c68654
@@ -180,7 +180,7 @@ F src/tokenize.c b5fdc79fb7e00077b9c02af7a0da3b89c9f3398e
F src/trigger.c bdb56bb9db1a7b18f8505484051221ab5123f21d F src/trigger.c bdb56bb9db1a7b18f8505484051221ab5123f21d
F src/update.c 4e698fcc0c91c241a960304c4236dc3a49603155 F src/update.c 4e698fcc0c91c241a960304c4236dc3a49603155
F src/utf.c 8d52f620a7153d90b058502124fe51d821fcdf57 F src/utf.c 8d52f620a7153d90b058502124fe51d821fcdf57
F src/util.c a8f80412a536ea309c1887e5d4b58a3fa6eca69c F src/util.c f94d11f931775e325b1a9f97b5cd3005bc4328ba
F src/vacuum.c ef342828002debc97514617af3424aea8ef8522c F src/vacuum.c ef342828002debc97514617af3424aea8ef8522c
F src/vdbe.c 179dbe5f08b17c712be65e951eaada3b3ca52092 F src/vdbe.c 179dbe5f08b17c712be65e951eaada3b3ca52092
F src/vdbe.h c46155c221418bea29ee3a749d5950fcf85a70e2 F src/vdbe.h c46155c221418bea29ee3a749d5950fcf85a70e2
@@ -608,7 +608,7 @@ F tool/speedtest16.c c8a9c793df96db7e4933f0852abb7a03d48f2e81
F tool/speedtest2.tcl ee2149167303ba8e95af97873c575c3e0fab58ff F tool/speedtest2.tcl ee2149167303ba8e95af97873c575c3e0fab58ff
F tool/speedtest8.c 1dbced29de5f59ba2ebf877edcadf171540374d1 F tool/speedtest8.c 1dbced29de5f59ba2ebf877edcadf171540374d1
F tool/speedtest8inst1.c 293327bc76823f473684d589a8160bde1f52c14e F tool/speedtest8inst1.c 293327bc76823f473684d589a8160bde1f52c14e
P c67aa5057deda6419e1f205118bf09957d599c15 P 8474cde34b3fcb99cd5908fddb8528d0db331cdf
R 8745c7fb5b4644c4f38b49737035177e R 4ff2e855d27a90c3263b2dd456288ee5
U shane U shane
Z e2ad2c8167d4599ae7ade4fe1ae5e2bd Z 4590470ad70206bca68504216297f533

2
manifest.uuid
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@@ -1 +1 @@
8474cde34b3fcb99cd5908fddb8528d0db331cdf e20f2b8c6a13aa826703441cf340d0ee03bf9f64

12
src/util.c
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@@ -14,7 +14,7 @@
** This file contains functions for allocating memory, comparing ** This file contains functions for allocating memory, comparing
** strings, and stuff like that. ** strings, and stuff like that.
** **
** $Id: util.c,v 1.238 2008/07/11 16:19:10 drh Exp $ ** $Id: util.c,v 1.239 2008/07/22 05:15:53 shane Exp $
*/ */
#include "sqliteInt.h" #include "sqliteInt.h"
#include <stdarg.h> #include <stdarg.h>
@@ -22,7 +22,7 @@
/* /*
** Return true if the floating point value is Not a Number. ** Return true if the floating point value is Not a Number (NaN).
*/ */
int sqlite3IsNaN(double x){ int sqlite3IsNaN(double x){
/* This NaN test sometimes fails if compiled on GCC with -ffast-math. /* This NaN test sometimes fails if compiled on GCC with -ffast-math.
@@ -33,6 +33,14 @@ int sqlite3IsNaN(double x){
** -O option since it can result in incorrect output for programs ** -O option since it can result in incorrect output for programs
** which depend on an exact implementation of IEEE or ISO ** which depend on an exact implementation of IEEE or ISO
** rules/specifications for math functions. ** rules/specifications for math functions.
**
** Under MSVC, this NaN test may fail if compiled with a floating-
** point precision mode other than /fp:precise. From the MSDN
** documentation:
**
** The compiler [with /fp:precise] will properly handle comparisons
** involving NaN. For example, x != x evaluates to true if x is NaN
** ...
*/ */
#ifdef __FAST_MATH__ #ifdef __FAST_MATH__
# error SQLite will not work correctly with the -ffast-math option of GCC. # error SQLite will not work correctly with the -ffast-math option of GCC.