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(1 << 31) with signed integer has undefined behavior in C

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Roberto Ierusalimschy
2017-12-15 16:35:22 -02:00
parent b3f924bc69
commit 4b6928e7f5
1 changed files with 2 additions and 2 deletions
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4
lopcodes.h
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@@ -1,5 +1,5 @@
/*
** $Id: lopcodes.h,v 1.176 2017/12/04 17:41:30 roberto Exp roberto $
** $Id: lopcodes.h,v 1.177 2017/12/13 18:32:09 roberto Exp roberto $
** Opcodes for Lua virtual machine
** See Copyright Notice in lua.h
*/
@@ -121,7 +121,7 @@ enum OpMode {iABC, iABx, iAsBx, iAx, isJ}; /* basic instruction formats */
#define GETARG_sC(i) (GETARG_C(i) - MAXARG_sC)
#define SETARG_C(i,v) setarg(i, v, POS_C, SIZE_C)
#define TESTARG_k(i) (cast(int, ((i) & (1 << POS_k))))
#define TESTARG_k(i) (cast(int, ((i) & (1u << POS_k))))
#define GETARG_k(i) getarg(i, POS_k, 1)
#define SETARG_k(i,v) setarg(i, v, POS_k, 1)