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no more integer exponentiation

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Roberto Ierusalimschy
2014-05-12 18:22:05 -03:00
parent 12bd01c567
commit 27d9219cf3
3 changed files with 6 additions and 30 deletions
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25
lvm.c
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@@ -1,5 +1,5 @@
/*
** $Id: lvm.c,v 2.206 2014/05/09 14:20:52 roberto Exp roberto $
** $Id: lvm.c,v 2.207 2014/05/12 19:13:32 roberto Exp roberto $
** Lua virtual machine
** See Copyright Notice in lua.h
*/
@@ -480,22 +480,6 @@ lua_Integer luaV_mod (lua_State *L, lua_Integer m, lua_Integer n) {
}
lua_Integer luaV_pow (lua_Integer m, lua_Integer n) {
lua_assert(n >= 0);
if (n == 0)
return 1; /* m^0 == 1 */
else {
lua_Integer r = 1;
for (; n > 1; n >>= 1) {
if (n & 1) r = intop(*, r, m);
m = intop(*, m, m);
}
r = intop(*, r, m);
return r;
}
}
/* number of bits in an integer */
#define NBITS cast_int(sizeof(lua_Integer) * CHAR_BIT)
@@ -869,12 +853,7 @@ void luaV_execute (lua_State *L) {
TValue *rb = RKB(i);
TValue *rc = RKC(i);
lua_Number nb; lua_Number nc;
lua_Integer ic;
if (ttisinteger(rb) && ttisinteger(rc) && (ic = ivalue(rc)) >= 0) {
lua_Integer ib = ivalue(rb);
setivalue(ra, luaV_pow(ib, ic));
}
else if (tonumber(rb, &nb) && tonumber(rc, &nc)) {
if (tonumber(rb, &nb) && tonumber(rc, &nc)) {
setfltvalue(ra, luai_numpow(L, nb, nc));
}
else { Protect(luaT_trybinTM(L, rb, rc, ra, TM_POW)); }