Revert "ext/gmp: gmp_pow fix FPE with large values."

This reverts commit d70b781.

Author: devnexen

NEWS

@@ -129,8 +129,6 @@ PHP                                                                        NEWS
     (nielsdos)
 
 - GMP:
-  . Fixed floating point exception bug with gmp_pow when using
-    large exposant values. (David Carlier).
   . Fixed bug GH-16411 (gmp_export() can cause overflow). (cmb)
   . Fixed bug GH-16501 (gmp_random_bits() can cause overflow).
     (David Carlier)

ext/gmp/gmp.c

@@ -1366,37 +1366,12 @@ ZEND_FUNCTION(gmp_pow)
 
 	if (Z_TYPE_P(base_arg) == IS_LONG && Z_LVAL_P(base_arg) >= 0) {
 		INIT_GMP_RETVAL(gmpnum_result);
-		if (exp >= INT_MAX) {
-			mpz_t base_num, exp_num, mod;
-			mpz_init(base_num);
-			mpz_init(exp_num);
-			mpz_init(mod);
-			mpz_set_si(base_num, Z_LVAL_P(base_arg));
-			mpz_set_si(exp_num, exp);
-			mpz_set_ui(mod, UINT_MAX);
-			mpz_powm(gmpnum_result, base_num, exp_num, mod);
-			mpz_clear(mod);
-			mpz_clear(exp_num);
-			mpz_clear(base_num);
-		} else {
-			mpz_ui_pow_ui(gmpnum_result, Z_LVAL_P(base_arg), exp);
-		}
+		mpz_ui_pow_ui(gmpnum_result, Z_LVAL_P(base_arg), exp);
 	} else {
 		mpz_ptr gmpnum_base;
 		FETCH_GMP_ZVAL(gmpnum_base, base_arg, temp_base, 1);
 		INIT_GMP_RETVAL(gmpnum_result);
-		if (exp >= INT_MAX) {
-			mpz_t exp_num, mod;
-			mpz_init(exp_num);
-			mpz_init(mod);
-			mpz_set_si(exp_num, exp);
-			mpz_set_ui(mod, UINT_MAX);
-			mpz_powm(gmpnum_result, gmpnum_base, exp_num, mod);
-			mpz_clear(mod);
-			mpz_clear(exp_num);
-		} else {
-			mpz_pow_ui(gmpnum_result, gmpnum_base, exp);
-		}
+		mpz_pow_ui(gmpnum_result, gmpnum_base, exp);
 		FREE_GMP_TEMP(temp_base);
 	}
 }