commit f1629217f136c37b58c912692b4d78f4314b4795
parent fdd5f2f7a32535eb8f2fbafbed2d84c0e69392c0
Author: Roberto Ierusalimschy <roberto@inf.puc-rio.br>
Date: Wed, 3 Nov 2010 13:15:53 -0200
code for conversion macros moved from luaconf to llimits + 'uint'
renamed to 'unsigned' in those macros
Diffstat:
| M | lapi.c | | | 6 | +++--- |
| M | llimits.h | | | 91 | ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++- |
| M | luaconf.h | | | 107 | ++++++------------------------------------------------------------------------- |
3 files changed, 101 insertions(+), 103 deletions(-)
diff --git a/lapi.c b/lapi.c
@@ -1,5 +1,5 @@
/*
-** $Id: lapi.c,v 2.138 2010/10/25 19:01:37 roberto Exp roberto $
+** $Id: lapi.c,v 2.139 2010/10/25 20:31:11 roberto Exp roberto $
** Lua API
** See Copyright Notice in lua.h
*/
@@ -353,7 +353,7 @@ LUA_API lua_Unsigned lua_tounsignedx (lua_State *L, int idx, int *isnum) {
if (tonumber(o, &n)) {
lua_Unsigned res;
lua_Number num = nvalue(o);
- lua_number2uint(res, num);
+ lua_number2unsigned(res, num);
if (isnum) *isnum = 1;
return res;
}
@@ -472,7 +472,7 @@ LUA_API void lua_pushinteger (lua_State *L, lua_Integer n) {
LUA_API void lua_pushunsigned (lua_State *L, lua_Unsigned u) {
lua_Number n;
lua_lock(L);
- n = lua_uint2number(u);
+ n = lua_unsigned2number(u);
setnvalue(L->top, n);
api_incr_top(L);
lua_unlock(L);
diff --git a/llimits.h b/llimits.h
@@ -1,5 +1,5 @@
/*
-** $Id: llimits.h,v 1.81 2010/05/24 19:29:46 roberto Exp roberto $
+** $Id: llimits.h,v 1.82 2010/05/31 16:08:55 roberto Exp roberto $
** Limits, basic types, and some other `installation-dependent' definitions
** See Copyright Notice in lua.h
*/
@@ -168,6 +168,95 @@ typedef lu_int32 Instruction;
#define luai_userstateyield(L,n) ((void)L)
#endif
+/*
+** lua_number2int is a macro to convert lua_Number to int.
+** lua_number2integer is a macro to convert lua_Number to LUA_INTEGER.
+** lua_number2unsigned is a macro to convert a lua_Number to a LUA_UNSIGNED.
+** lua_unsigned2number is a macro to convert a LUA_UNSIGNED to a lua_Number.
+*/
+
+#if defined(MS_ASMTRICK) /* { */
+/* trick with Microsoft assembler for X86 */
+
+#define lua_number2int(i,n) __asm {__asm fld n __asm fistp i}
+#define lua_number2integer(i,n) lua_number2int(i, n)
+#define lua_number2unsigned(i,n) \
+ {__int64 l; __asm {__asm fld n __asm fistp l} i = (unsigned int)l;}
+
+
+#elif defined(LUA_IEEE754TRICK) /* }{ */
+/* the next trick should work on any machine using IEEE754 with
+ a 32-bit integer type */
+
+union luai_Cast { double l_d; LUA_INT32 l_p[2]; };
+
+#if !defined(LUA_IEEEENDIAN) /* { */
+#define LUAI_EXTRAIEEE \
+ static const union luai_Cast ieeeendian = {-(33.0 + 6755399441055744.0)};
+#define LUA_IEEEENDIAN (ieeeendian.l_p[1] == 33)
+#else
+#define LUAI_EXTRAIEEE /* empty */
+#endif /* } */
+
+#define lua_number2int32(i,n,t) \
+ { LUAI_EXTRAIEEE \
+ volatile union luai_Cast u; u.l_d = (n) + 6755399441055744.0; \
+ (i) = (t)u.l_p[LUA_IEEEENDIAN]; }
+
+#define lua_number2int(i,n) lua_number2int32(i, n, int)
+#define lua_number2integer(i,n) lua_number2int32(i, n, LUA_INTEGER)
+#define lua_number2unsigned(i,n) lua_number2int32(i, n, LUA_UNSIGNED)
+
+#endif /* } */
+
+
+/* the following definitions always work, but may be slow */
+
+#if !defined(lua_number2int)
+#define lua_number2int(i,n) ((i)=(int)(n))
+#endif
+
+#if !defined(lua_number2integer)
+#define lua_number2integer(i,n) ((i)=(LUA_INTEGER)(n))
+#endif
+
+#if !defined(lua_number2unsigned) /* { */
+/* the following definition assures proper modulo behavior */
+#if defined(LUA_NUMBER_DOUBLE)
+#include <math.h>
+#define lua_number2unsigned(i,n) \
+ ((i)=(LUA_UNSIGNED)((n) - floor((n)/4294967296.0)*4294967296.0))
+#else
+#define lua_number2unsigned(i,n) ((i)=(LUA_UNSIGNED)(n))
+#endif
+#endif /* } */
+
+
+#if !defined(lua_unsigned2number)
+/* on several machines, coercion from unsigned to double is slow,
+ so it may be worth to avoid */
+#define lua_unsigned2number(u) \
+ ((LUA_INT32)(u) < 0 ? (lua_Number)(u) : (lua_Number)(LUA_INT32)(u))
+#endif
+
+
+/*
+** luai_hashnum is a macro do hash a lua_Number value into an integer.
+** The hash must be deterministic and give reasonable values for
+** both small and large values (outside the range of integers).
+** It is used only in ltable.c.
+*/
+
+#if !defined(luai_hashnum) /* { */
+
+#include <float.h>
+#include <math.h>
+
+#define luai_hashnum(i,n) { int e; \
+ n = frexp(n, &e) * (lua_Number)(INT_MAX - DBL_MAX_EXP); \
+ lua_number2int(i, n); i += e; }
+
+#endif /* } */
diff --git a/luaconf.h b/luaconf.h
@@ -1,5 +1,5 @@
/*
-** $Id: luaconf.h,v 1.147 2010/10/29 11:13:21 roberto Exp roberto $
+** $Id: luaconf.h,v 1.148 2010/10/29 17:52:46 roberto Exp roberto $
** Configuration file for Lua
** See Copyright Notice in lua.h
*/
@@ -348,27 +348,13 @@
-/*
-** {==================================================================
-** CHANGE (to smaller values) the following definitions if your system
-** has a small C stack. (Or you may want to change them to larger
-** values if your system has a large C stack and these limits are
-** too rigid for you.) Some of these constants control the size of
-** stack-allocated arrays used by the compiler or the interpreter, while
-** others limit the maximum number of recursive calls that the compiler
-** or the interpreter can perform. Values too large may cause a C stack
-** overflow for some forms of deep constructs.
-** ===================================================================
-*/
-
/*
@@ LUAL_BUFFERSIZE is the buffer size used by the lauxlib buffer system.
+** CHANGE it if it uses too much C-stack space.
*/
#define LUAL_BUFFERSIZE BUFSIZ
-/* }================================================================== */
-
@@ -445,32 +431,21 @@
#define LUA_UNSIGNED unsigned LUA_INT32
-/*
-@@ lua_number2int is a macro to convert lua_Number to int.
-@@ lua_number2integer is a macro to convert lua_Number to LUA_INTEGER.
-@@ lua_number2uint is a macro to convert a lua_Number to a LUA_UNSIGNED.
-@@ lua_uint2number is a macro to convert a LUA_UNSIGNED to a lua_Number.
-*/
-
#if defined(LUA_CORE) /* { */
-#if defined(LUA_NUMBER_DOUBLE) && !defined(LUA_ANSI) && \
- !defined(LUA_NOIEEE754TRICK) /* { */
+#if defined(LUA_NUMBER_DOUBLE) && !defined(LUA_ANSI) /* { */
/* On a Microsoft compiler on a Pentium, use assembler to avoid clashes
with a DirectX idiosyncrasy */
#if defined(_MSC_VER) && defined(M_IX86) /* { */
-#define lua_number2int(i,n) __asm {__asm fld n __asm fistp i}
-#define lua_number2integer(i,n) lua_number2int(i, n)
-#define lua_number2uint(i,n) \
- {__int64 l; __asm {__asm fld n __asm fistp l} i = (unsigned int)l;}
+#define MS_ASMTRICK
#else /* }{ */
-/* the next trick should work on any machine using IEEE754 with
- a 32-bit integer type */
+/* the next definition uses a trick that should work on any machine
+ using IEEE754 with a 32-bit integer type */
-union luai_Cast { double l_d; LUA_INT32 l_p[2]; };
+#define LUA_IEEE754TRICK
/*
@@ LUA_IEEEENDIAN is the endianness of doubles in your machine
@@ -485,77 +460,11 @@ union luai_Cast { double l_d; LUA_INT32 l_p[2]; };
#define LUA_IEEEENDIAN 1
#endif
-#if !defined(LUA_IEEEENDIAN) /* { */
-#define LUAI_EXTRAIEEE \
- static const union luai_Cast ieeeendian = {-(33.0 + 6755399441055744.0)};
-#define LUA_IEEEENDIAN (ieeeendian.l_p[1] == 33)
-#else
-#define LUAI_EXTRAIEEE /* empty */
-#endif /* } */
-
-#define lua_number2int32(i,n,t) \
- { LUAI_EXTRAIEEE \
- volatile union luai_Cast u; u.l_d = (n) + 6755399441055744.0; \
- (i) = (t)u.l_p[LUA_IEEEENDIAN]; }
-
-#define lua_number2int(i,n) lua_number2int32(i, n, int)
-#define lua_number2integer(i,n) lua_number2int32(i, n, LUA_INTEGER)
-#define lua_number2uint(i,n) lua_number2int32(i, n, LUA_UNSIGNED)
-
#endif /* } */
-
#endif /* } */
-
-/* the following definitions always work, but may be slow */
-
-#if !defined(lua_number2int)
-#define lua_number2int(i,n) ((i)=(int)(n))
-#endif
-
-#if !defined(lua_number2integer)
-#define lua_number2integer(i,n) ((i)=(LUA_INTEGER)(n))
-#endif
-
-#if !defined(lua_number2uint) && (defined(lapi_c) || defined(luaall_c)) /* { */
-/* the following definition assures proper modulo behavior */
-#if defined(LUA_NUMBER_DOUBLE)
-#include <math.h>
-#define lua_number2uint(i,n) \
- ((i)=(LUA_UNSIGNED)((n) - floor((n)/4294967296.0)*4294967296.0))
-#else
-#define lua_number2uint(i,n) ((i)=(LUA_UNSIGNED)(n))
-#endif
-#endif /* } */
-
-#if !defined(lua_uint2number)
-/* on several machines, coercion from unsigned to double is slow,
- so it may be worth to avoid */
-#define lua_uint2number(u) \
- ((LUA_INT32)(u) < 0 ? (lua_Number)(u) : (lua_Number)(LUA_INT32)(u))
-#endif
-
-#endif /* } */
-
-
-/*
-@@ luai_hashnum is a macro do hash a lua_Number value into an integer.
-@* The hash must be deterministic and give reasonable values for
-@* both small and large values (outside the range of integers).
-@* It is used only in ltable.c.
-*/
-
-#if defined(ltable_c) || defined(luaall_c)
-
-#include <float.h>
-#include <math.h>
-
-#define luai_hashnum(i,n) { int e; \
- n = frexp(n, &e) * (lua_Number)(INT_MAX - DBL_MAX_EXP); \
- lua_number2int(i, n); i += e; }
-
-#endif /* ltable_c */
+#endif /* } */
/* }================================================================== */
