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A few changes in tests about number of bits in integers

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- The preprocessor must work with at least 'long', and therefore must
do shifts of up to 31 bits correctly.
- Whenever possible, use unsigned types in shifts.
This commit is contained in:
Roberto Ierusalimschy
2019-05-13 16:17:21 -03:00
parent 49c42f3615
commit 279c3a6961
6 changed files with 19 additions and 18 deletions
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8
lmathlib.c
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@@ -266,7 +266,7 @@ static int math_type (lua_State *L) {
/* try to find an integer type with at least 64 bits */
#if (LONG_MAX >> 31 >> 31) >= 1
#if (ULONG_MAX >> 31 >> 31) >= 3
/* 'long' has at least 64 bits */
#define Rand64 unsigned long
@@ -276,7 +276,7 @@ static int math_type (lua_State *L) {
/* there is a 'long long' type (which must have at least 64 bits) */
#define Rand64 unsigned long long
#elif (LUA_MAXINTEGER >> 31 >> 31) >= 1
#elif (LUA_MAXINTEGER >> 30 >> 30) >= 7
/* 'lua_Integer' has at least 64 bits */
#define Rand64 lua_Unsigned
@@ -347,7 +347,7 @@ static lua_Number I2d (Rand64 x) {
#else /* no 'Rand64' }{ */
/* get an integer with at least 32 bits */
#if (INT_MAX >> 30) >= 1
#if LUAI_IS32INT
typedef unsigned int lu_int32;
#else
typedef unsigned long lu_int32;
@@ -538,7 +538,7 @@ static lua_Unsigned project (lua_Unsigned ran, lua_Unsigned n,
lim |= (lim >> 4);
lim |= (lim >> 8);
lim |= (lim >> 16);
#if (LUA_MAXINTEGER >> 30 >> 1) > 0
#if (LUA_MAXINTEGER >> 30) >= 3
lim |= (lim >> 32); /* integer type has more than 32 bits */
#endif
}