+2004-05-18 Paul Brook <paul@codesourcery.com>
+
+ * f95-lang.c (gfc_init_builtin_functions): Use vold_list_node.
+ Create decls for __builtin_pow{,f}.
+ * gfortran.h (PREFIX_LEN): Define.
+ * trans-decl.c (gfor_fndecl_math_powi): Add.
+ (gfor_fndecl_math_powf, gfor_fndecl_math_pow): Remove.
+ (gfc_build_intrinsic_function_decls): Create decls for powi.
+ * trans-expr.c (powi_table): Add.
+ (gfc_conv_integer_power): Remove.
+ (gfc_conv_powi): New function.
+ (gfc_conv_cst_int_power): New function.
+ (gfc_conv_power_op): Use new powi routines.
+ * trans.h (struct gfc_powdecl_list): Add.
+ (gfor_fndecl_math_powi): Add.
+ (gfor_fndecl_math_powf, gfor_fndecl_math_pow): Remove.
+
2004-05-18 Tobias Schlueter <tobias.schlueter@physik.uni-muenchen.de>
* trans.c, trans-decl.c: Fix comment typos.
tree mfunc_double[2];
tree ftype;
tree tmp;
- tree voidchain;
- voidchain = tree_cons (NULL_TREE, void_type_node, NULL_TREE);
-
- tmp = tree_cons (NULL_TREE, float_type_node, voidchain);
+ tmp = tree_cons (NULL_TREE, float_type_node, void_list_node);
mfunc_float[0] = build_function_type (float_type_node, tmp);
tmp = tree_cons (NULL_TREE, float_type_node, tmp);
mfunc_float[1] = build_function_type (float_type_node, tmp);
- tmp = tree_cons (NULL_TREE, double_type_node, voidchain);
+ tmp = tree_cons (NULL_TREE, double_type_node, void_list_node);
mfunc_double[0] = build_function_type (double_type_node, tmp);
tmp = tree_cons (NULL_TREE, double_type_node, tmp);
mfunc_double[1] = build_function_type (double_type_node, tmp);
gfc_define_builtin ("__builtin_roundf", mfunc_float[0],
BUILT_IN_ROUNDF, "roundf", true);
+ /* These are used to implement the ** operator. */
+ gfc_define_builtin ("__builtin_pow", mfunc_double[0],
+ BUILT_IN_POW, "pow", true);
+ gfc_define_builtin ("__builtin_powf", mfunc_float[0],
+ BUILT_IN_POWF, "powf", true);
+
/* Other builtin functions we use. */
- tmp = tree_cons (NULL_TREE, long_integer_type_node, voidchain);
+ tmp = tree_cons (NULL_TREE, long_integer_type_node, void_list_node);
tmp = tree_cons (NULL_TREE, long_integer_type_node, tmp);
ftype = build_function_type (long_integer_type_node, tmp);
gfc_define_builtin ("__builtin_expect", ftype, BUILT_IN_EXPECT,
"__builtin_expect", true);
- tmp = tree_cons (NULL_TREE, size_type_node, voidchain);
+ tmp = tree_cons (NULL_TREE, size_type_node, void_list_node);
tmp = tree_cons (NULL_TREE, pvoid_type_node, tmp);
tmp = tree_cons (NULL_TREE, pvoid_type_node, tmp);
ftype = build_function_type (pvoid_type_node, tmp);
gfc_define_builtin ("__builtin_memcpy", ftype, BUILT_IN_MEMCPY,
"memcpy", false);
- tmp = tree_cons (NULL_TREE, integer_type_node, voidchain);
+ tmp = tree_cons (NULL_TREE, integer_type_node, void_list_node);
ftype = build_function_type (integer_type_node, tmp);
gfc_define_builtin ("__builtin_clz", ftype, BUILT_IN_CLZ, "clz", true);
- tmp = tree_cons (NULL_TREE, long_integer_type_node, voidchain);
+ tmp = tree_cons (NULL_TREE, long_integer_type_node, void_list_node);
ftype = build_function_type (integer_type_node, tmp);
gfc_define_builtin ("__builtin_clzl", ftype, BUILT_IN_CLZL, "clzl", true);
- tmp = tree_cons (NULL_TREE, long_long_integer_type_node, voidchain);
+ tmp = tree_cons (NULL_TREE, long_long_integer_type_node, void_list_node);
ftype = build_function_type (integer_type_node, tmp);
gfc_define_builtin ("__builtin_clzll", ftype, BUILT_IN_CLZLL, "clzll", true);
- tmp = tree_cons (NULL_TREE, pvoid_type_node, voidchain);
+ tmp = tree_cons (NULL_TREE, pvoid_type_node, void_list_node);
tmp = tree_cons (NULL_TREE, pvoid_type_node, tmp);
tmp = tree_cons (NULL_TREE, pvoid_type_node, tmp);
ftype = build_function_type (void_type_node, tmp);
gfc_define_builtin ("__builtin_init_trampoline", ftype,
BUILT_IN_INIT_TRAMPOLINE, "init_trampoline", false);
- tmp = tree_cons (NULL_TREE, pvoid_type_node, voidchain);
+ tmp = tree_cons (NULL_TREE, pvoid_type_node, void_list_node);
ftype = build_function_type (pvoid_type_node, tmp);
gfc_define_builtin ("__builtin_adjust_trampoline", ftype,
BUILT_IN_ADJUST_TRAMPOLINE, "adjust_trampoline", true);
- tmp = tree_cons (NULL_TREE, pvoid_type_node, voidchain);
- tmp = tree_cons (NULL_TREE, size_type_node, voidchain);
+ tmp = tree_cons (NULL_TREE, pvoid_type_node, void_list_node);
+ tmp = tree_cons (NULL_TREE, size_type_node, void_list_node);
ftype = build_function_type (pvoid_type_node, tmp);
gfc_define_builtin ("__builtin_stack_alloc", ftype, BUILT_IN_STACK_ALLOC,
"stack_alloc", false);
/* The stack_save and stack_restore builtins aren't used directly. They
are inserted during gimplification to implement stack_alloc calls. */
- ftype = build_function_type (pvoid_type_node, voidchain);
+ ftype = build_function_type (pvoid_type_node, void_list_node);
gfc_define_builtin ("__builtin_stack_save", ftype, BUILT_IN_STACK_SAVE,
"stack_save", false);
- tmp = tree_cons (NULL_TREE, pvoid_type_node, voidchain);
+ tmp = tree_cons (NULL_TREE, pvoid_type_node, void_list_node);
ftype = build_function_type (void_type_node, tmp);
gfc_define_builtin ("__builtin_stack_restore", ftype, BUILT_IN_STACK_RESTORE,
"stack_restore", false);
ugly to look at and a pain to type when you add the prefix by hand,
so we hide it behind a macro. */
#define PREFIX(x) "_gfortran_" x
+#define PREFIX_LEN 10
/* Macro to initialize an mstring structure. */
#define minit(s, t) { s, NULL, t }
/* Math functions. Many other math functions are handled in
trans-intrinsic.c. */
-tree gfor_fndecl_math_powf;
-tree gfor_fndecl_math_pow;
+gfc_powdecl_list gfor_fndecl_math_powi[3][2];
tree gfor_fndecl_math_cpowf;
tree gfor_fndecl_math_cpow;
tree gfor_fndecl_math_cabsf;
/* Power functions. */
- gfor_fndecl_math_powf =
- gfc_build_library_function_decl (get_identifier ("powf"),
- gfc_real4_type_node,
- 1, gfc_real4_type_node);
- gfor_fndecl_math_pow =
- gfc_build_library_function_decl (get_identifier ("pow"),
- gfc_real8_type_node,
- 1, gfc_real8_type_node);
+ {
+ tree type;
+ tree itype;
+ int kind;
+ int ikind;
+ static int kinds[2] = {4, 8};
+ char name[PREFIX_LEN + 10]; /* _gfortran_pow_?n_?n */
+
+ for (ikind=0; ikind < 2; ikind++)
+ {
+ itype = gfc_get_int_type (kinds[ikind]);
+ for (kind = 0; kind < 2; kind ++)
+ {
+ type = gfc_get_int_type (kinds[kind]);
+ sprintf(name, PREFIX("pow_i%d_i%d"), kinds[kind], kinds[ikind]);
+ gfor_fndecl_math_powi[kind][ikind].integer =
+ gfc_build_library_function_decl (get_identifier (name),
+ type, 2, type, itype);
+
+ type = gfc_get_real_type (kinds[kind]);
+ sprintf(name, PREFIX("pow_r%d_i%d"), kinds[kind], kinds[ikind]);
+ gfor_fndecl_math_powi[kind][ikind].real =
+ gfc_build_library_function_decl (get_identifier (name),
+ type, 2, type, itype);
+
+ type = gfc_get_complex_type (kinds[kind]);
+ sprintf(name, PREFIX("pow_c%d_i%d"), kinds[kind], kinds[ikind]);
+ gfor_fndecl_math_powi[kind][ikind].cmplx =
+ gfc_build_library_function_decl (get_identifier (name),
+ type, 2, type, itype);
+ }
+ }
+ }
+
gfor_fndecl_math_cpowf =
gfc_build_library_function_decl (get_identifier ("cpowf"),
gfc_complex4_type_node,
}
-
-/* For power op (lhs ** rhs) We generate:
- m = lhs
- if (rhs > 0)
- count = rhs
- else if (rhs == 0)
- {
- count = 0
- m = 1
- }
- else // (rhs < 0)
- {
- count = -rhs
- m = 1 / m;
- }
- // for constant rhs we do the above at compile time
- val = m;
- for (n = 1; n < count; n++)
- val = val * m;
- */
-
-static void
-gfc_conv_integer_power (gfc_se * se, tree lhs, tree rhs)
+/* Expand power operator to optimal multiplications when a value is raised
+ to an constant integer n. See section 4.6.3, "Evaluation of Powers" of
+ Donald E. Knuth, "Seminumerical Algorithms", Vol. 2, "The Art of Computer
+ Programming", 3rd Edition, 1998. */
+
+/* This code is mostly duplicated from expand_powi in the backend.
+ We establish the "optimal power tree" lookup table with the defined size.
+ The items in the table are the exponents used to calculate the index
+ exponents. Any integer n less than the value can get an "addition chain",
+ with the first node being one. */
+#define POWI_TABLE_SIZE 256
+
+/* The table is from Builtins.c. */
+static const unsigned char powi_table[POWI_TABLE_SIZE] =
+ {
+ 0, 1, 1, 2, 2, 3, 3, 4, /* 0 - 7 */
+ 4, 6, 5, 6, 6, 10, 7, 9, /* 8 - 15 */
+ 8, 16, 9, 16, 10, 12, 11, 13, /* 16 - 23 */
+ 12, 17, 13, 18, 14, 24, 15, 26, /* 24 - 31 */
+ 16, 17, 17, 19, 18, 33, 19, 26, /* 32 - 39 */
+ 20, 25, 21, 40, 22, 27, 23, 44, /* 40 - 47 */
+ 24, 32, 25, 34, 26, 29, 27, 44, /* 48 - 55 */
+ 28, 31, 29, 34, 30, 60, 31, 36, /* 56 - 63 */
+ 32, 64, 33, 34, 34, 46, 35, 37, /* 64 - 71 */
+ 36, 65, 37, 50, 38, 48, 39, 69, /* 72 - 79 */
+ 40, 49, 41, 43, 42, 51, 43, 58, /* 80 - 87 */
+ 44, 64, 45, 47, 46, 59, 47, 76, /* 88 - 95 */
+ 48, 65, 49, 66, 50, 67, 51, 66, /* 96 - 103 */
+ 52, 70, 53, 74, 54, 104, 55, 74, /* 104 - 111 */
+ 56, 64, 57, 69, 58, 78, 59, 68, /* 112 - 119 */
+ 60, 61, 61, 80, 62, 75, 63, 68, /* 120 - 127 */
+ 64, 65, 65, 128, 66, 129, 67, 90, /* 128 - 135 */
+ 68, 73, 69, 131, 70, 94, 71, 88, /* 136 - 143 */
+ 72, 128, 73, 98, 74, 132, 75, 121, /* 144 - 151 */
+ 76, 102, 77, 124, 78, 132, 79, 106, /* 152 - 159 */
+ 80, 97, 81, 160, 82, 99, 83, 134, /* 160 - 167 */
+ 84, 86, 85, 95, 86, 160, 87, 100, /* 168 - 175 */
+ 88, 113, 89, 98, 90, 107, 91, 122, /* 176 - 183 */
+ 92, 111, 93, 102, 94, 126, 95, 150, /* 184 - 191 */
+ 96, 128, 97, 130, 98, 133, 99, 195, /* 192 - 199 */
+ 100, 128, 101, 123, 102, 164, 103, 138, /* 200 - 207 */
+ 104, 145, 105, 146, 106, 109, 107, 149, /* 208 - 215 */
+ 108, 200, 109, 146, 110, 170, 111, 157, /* 216 - 223 */
+ 112, 128, 113, 130, 114, 182, 115, 132, /* 224 - 231 */
+ 116, 200, 117, 132, 118, 158, 119, 206, /* 232 - 239 */
+ 120, 240, 121, 162, 122, 147, 123, 152, /* 240 - 247 */
+ 124, 166, 125, 214, 126, 138, 127, 153, /* 248 - 255 */
+ };
+
+/* If n is larger than lookup table's max index, we use "window method". */
+#define POWI_WINDOW_SIZE 3
+
+/* Recursive function to expand power operator. The temporary values are put
+ in tmpvar. The function return tmpvar[1] ** n. */
+static tree
+gfc_conv_powi (gfc_se * se, int n, tree * tmpvar)
{
- tree count;
- tree result;
- tree cond;
- tree neg_stmt;
- tree pos_stmt;
+ tree op0;
+ tree op1;
tree tmp;
- tree var;
- tree type;
- stmtblock_t block;
- tree exit_label;
-
- type = TREE_TYPE (lhs);
+ int digit;
- if (INTEGER_CST_P (rhs))
+ if (n < POWI_TABLE_SIZE)
{
- if (integer_zerop (rhs))
- {
- se->expr = gfc_build_const (type, integer_one_node);
- return;
- }
- /* Special cases for constant values. */
- if (TREE_INT_CST_HIGH (rhs) == -1)
- {
- /* x ** (-y) == 1 / (x ** y). */
- if (TREE_CODE (type) == INTEGER_TYPE)
- {
- se->expr = integer_zero_node;
- return;
- }
-
- tmp = gfc_build_const (type, integer_one_node);
- lhs = fold (build (RDIV_EXPR, type, tmp, lhs));
+ if (tmpvar[n])
+ return tmpvar[n];
- rhs = fold (build1 (NEGATE_EXPR, TREE_TYPE (rhs), rhs));
- assert (INTEGER_CST_P (rhs));
- }
- else
- {
- /* TODO: really big integer powers. */
- assert (TREE_INT_CST_HIGH (rhs) == 0);
- }
-
- if (integer_onep (rhs))
- {
- se->expr = lhs;
- return;
- }
- if (TREE_INT_CST_LOW (rhs) == 2)
- {
- se->expr = build (MULT_EXPR, type, lhs, lhs);
- return;
- }
- if (TREE_INT_CST_LOW (rhs) == 3)
- {
- tmp = build (MULT_EXPR, type, lhs, lhs);
- se->expr = fold (build (MULT_EXPR, type, tmp, lhs));
- return;
- }
-
- /* Create the loop count variable. */
- count = gfc_create_var (TREE_TYPE (rhs), "count");
- gfc_add_modify_expr (&se->pre, count, rhs);
+ op0 = gfc_conv_powi (se, n - powi_table[n], tmpvar);
+ op1 = gfc_conv_powi (se, powi_table[n], tmpvar);
+ }
+ else if (n & 1)
+ {
+ digit = n & ((1 << POWI_WINDOW_SIZE) - 1);
+ op0 = gfc_conv_powi (se, n - digit, tmpvar);
+ op1 = gfc_conv_powi (se, digit, tmpvar);
}
else
{
- /* Put the lhs into a temporary variable. */
- var = gfc_create_var (type, "val");
- count = gfc_create_var (TREE_TYPE (rhs), "count");
- gfc_add_modify_expr (&se->pre, var, lhs);
- lhs = var;
-
- /* Generate code for negative rhs. */
- gfc_start_block (&block);
-
- if (TREE_CODE (TREE_TYPE (lhs)) == INTEGER_TYPE)
- {
- gfc_add_modify_expr (&block, lhs, integer_zero_node);
- gfc_add_modify_expr (&block, count, integer_zero_node);
- }
- else
- {
- tmp = gfc_build_const (type, integer_one_node);
- tmp = build (RDIV_EXPR, type, tmp, lhs);
- gfc_add_modify_expr (&block, var, tmp);
-
- tmp = build1 (NEGATE_EXPR, TREE_TYPE (rhs), rhs);
- gfc_add_modify_expr (&block, count, tmp);
- }
- neg_stmt = gfc_finish_block (&block);
-
- pos_stmt = build_v (MODIFY_EXPR, count, rhs);
-
- /* Code for rhs == 0. */
- gfc_start_block (&block);
-
- gfc_add_modify_expr (&block, count, integer_zero_node);
- tmp = gfc_build_const (type, integer_one_node);
- gfc_add_modify_expr (&block, lhs, tmp);
-
- tmp = gfc_finish_block (&block);
-
- /* Select the appropriate action. */
- cond = build (EQ_EXPR, boolean_type_node, rhs, integer_zero_node);
- tmp = build_v (COND_EXPR, cond, tmp, neg_stmt);
-
- cond = build (GT_EXPR, boolean_type_node, rhs, integer_zero_node);
- tmp = build_v (COND_EXPR, cond, pos_stmt, tmp);
- gfc_add_expr_to_block (&se->pre, tmp);
+ op0 = gfc_conv_powi (se, n >> 1, tmpvar);
+ op1 = op0;
}
- /* Create a variable for the result. */
- result = gfc_create_var (type, "pow");
- gfc_add_modify_expr (&se->pre, result, lhs);
-
- exit_label = gfc_build_label_decl (NULL_TREE);
- TREE_USED (exit_label) = 1;
+ tmp = fold (build (MULT_EXPR, TREE_TYPE (op0), op0, op1));
+ tmp = gfc_evaluate_now (tmp, &se->pre);
- /* Create the loop body. */
- gfc_start_block (&block);
+ if (n < POWI_TABLE_SIZE)
+ tmpvar[n] = tmp;
- /* First the exit condition (until count <= 1). */
- tmp = build1_v (GOTO_EXPR, exit_label);
- cond = build (LE_EXPR, TREE_TYPE (count), count, integer_one_node);
- tmp = build_v (COND_EXPR, cond, tmp, build_empty_stmt ());
- gfc_add_expr_to_block (&block, tmp);
+ return tmp;
+}
- /* Multiply by the lhs. */
- tmp = build (MULT_EXPR, type, result, lhs);
- gfc_add_modify_expr (&block, result, tmp);
+/* Expand lhs ** rhs. rhs is an constant integer. If expand successfully,
+ return 1. Else return 0 and will call runtime library functions. */
+static int
+gfc_conv_cst_int_power (gfc_se * se, tree lhs, tree rhs)
+{
+ tree cond;
+ tree tmp;
+ tree type;
+ tree vartmp[POWI_TABLE_SIZE];
+ int n;
+ int sgn;
- /* Adjust the loop count. */
- tmp = build (MINUS_EXPR, TREE_TYPE (count), count, integer_one_node);
- gfc_add_modify_expr (&block, count, tmp);
+ type = TREE_TYPE (lhs);
+ n = abs (TREE_INT_CST_LOW (rhs));
+ sgn = tree_int_cst_sgn (rhs);
- tmp = gfc_finish_block (&block);
+ if ((!flag_unsafe_math_optimizations || optimize_size) && (n > 2 || n < -1))
+ return 0;
- /* Create the the loop. */
- tmp = build_v (LOOP_EXPR, tmp);
- gfc_add_expr_to_block (&se->pre, tmp);
+ /* rhs == 0 */
+ if (sgn == 0)
+ {
+ se->expr = gfc_build_const (type, integer_one_node);
+ return 1;
+ }
+ /* If rhs < 0 and lhs is an integer, the result is -1, 0 or 1. */
+ if ((sgn == -1) && (TREE_CODE (type) == INTEGER_TYPE))
+ {
+ tmp = build (EQ_EXPR, boolean_type_node, lhs,
+ integer_minus_one_node);
+ cond = build (EQ_EXPR, boolean_type_node, lhs,
+ integer_one_node);
+
+ /* If rhs is an even,
+ result = (lhs == 1 || lhs == -1) ? 1 : 0. */
+ if ((n & 1) == 0)
+ {
+ tmp = build (TRUTH_OR_EXPR, boolean_type_node, tmp, cond);
+ se->expr = build (COND_EXPR, type, tmp, integer_one_node,
+ integer_zero_node);
+ return 1;
+ }
+ /* If rhs is an odd,
+ result = (lhs == 1) ? 1 : (lhs == -1) ? -1 : 0. */
+ tmp = build (COND_EXPR, type, tmp, integer_minus_one_node,
+ integer_zero_node);
+ se->expr = build (COND_EXPR, type, cond, integer_one_node,
+ tmp);
+ return 1;
+ }
- /* Add the exit label. */
- tmp = build1_v (LABEL_EXPR, exit_label);
- gfc_add_expr_to_block (&se->pre, tmp);
+ memset (vartmp, 0, sizeof (vartmp));
+ vartmp[1] = lhs;
- se->expr = result;
+ se->expr = gfc_conv_powi (se, n, vartmp);
+ if (sgn == -1)
+ {
+ tmp = gfc_build_const (type, integer_one_node);
+ se->expr = build (RDIV_EXPR, type, tmp, se->expr);
+ }
+ return 1;
}
-/* Power op (**). Integer rhs has special handling. */
+/* Power op (**). Constant integer exponent has special handling. */
static void
gfc_conv_power_op (gfc_se * se, gfc_expr * expr)
{
int kind;
+ int ikind;
gfc_se lse;
gfc_se rse;
tree fndecl;
tree tmp;
- tree type;
gfc_init_se (&lse, se);
gfc_conv_expr_val (&lse, expr->op1);
gfc_conv_expr_val (&rse, expr->op2);
gfc_add_block_to_block (&se->pre, &rse.pre);
- type = TREE_TYPE (lse.expr);
+ if (expr->op2->ts.type == BT_INTEGER
+ && expr->op2->expr_type == EXPR_CONSTANT)
+ if (gfc_conv_cst_int_power (se, lse.expr, rse.expr))
+ return;
kind = expr->op1->ts.kind;
switch (expr->op2->ts.type)
{
case BT_INTEGER:
- /* Integer powers are expanded inline as multiplications. */
- gfc_conv_integer_power (se, lse.expr, rse.expr);
- return;
+ ikind = expr->op2->ts.kind;
+ switch (ikind)
+ {
+ case 1:
+ case 2:
+ rse.expr = convert (gfc_int4_type_node, rse.expr);
+ /* Fall through. */
+
+ case 4:
+ ikind = 0;
+ break;
+
+ case 8:
+ ikind = 1;
+ break;
+
+ default:
+ abort();
+ }
+ switch (kind)
+ {
+ case 1:
+ case 2:
+ if (expr->op1->ts.type == BT_INTEGER)
+ lse.expr = convert (gfc_int4_type_node, lse.expr);
+ else
+ abort ();
+ /* Fall through. */
+
+ case 4:
+ kind = 0;
+ break;
+
+ case 8:
+ kind = 1;
+ break;
+
+ default:
+ abort();
+ }
+
+ switch (expr->op1->ts.type)
+ {
+ case BT_INTEGER:
+ fndecl = gfor_fndecl_math_powi[kind][ikind].integer;
+ break;
+
+ case BT_REAL:
+ fndecl = gfor_fndecl_math_powi[kind][ikind].real;
+ break;
+
+ case BT_COMPLEX:
+ fndecl = gfor_fndecl_math_powi[kind][ikind].cmplx;
+ break;
+
+ default:
+ abort ();
+ }
+ break;
case BT_REAL:
switch (kind)
{
case 4:
- fndecl = gfor_fndecl_math_powf;
+ fndecl = built_in_decls[BUILT_IN_POWF];
break;
case 8:
- fndecl = gfor_fndecl_math_pow;
+ fndecl = built_in_decls[BUILT_IN_POW];
break;
default:
abort ();
tmp = gfc_chainon_list (NULL_TREE, lse.expr);
tmp = gfc_chainon_list (tmp, rse.expr);
- se->expr = gfc_build_function_call (fndecl, tmp);
+ se->expr = fold (gfc_build_function_call (fndecl, tmp));
}
/* Math functions. Many other math functions are handled in
trans-intrinsic.c. */
-extern GTY(()) tree gfor_fndecl_math_powf;
-extern GTY(()) tree gfor_fndecl_math_pow;
+
+typedef struct gfc_powdecl_list GTY(())
+{
+ tree integer;
+ tree real;
+ tree cmplx;
+}
+gfc_powdecl_list;
+
+extern GTY(()) gfc_powdecl_list gfor_fndecl_math_powi[3][2];
extern GTY(()) tree gfor_fndecl_math_cpowf;
extern GTY(()) tree gfor_fndecl_math_cpow;
extern GTY(()) tree gfor_fndecl_math_cabsf;
+2004-05-18 Paul Brook <paul@codesourcery.com>
+
+ * gfortran.fortran-torture/execute/power.f90: Test constant integers.
+
2004-05-18 Andrew Pinski <pinskia@physics.uc.edu>
* gcc.dg/tree-ssa/20040518-1.c: New test.
implicit none
real(kind=4) r, s, two
real(kind=8) :: q
- complex(kind=4) :: c
+ complex(kind=4) :: c, z
real, parameter :: del = 0.0001
- integer i
+ integer i, j
+
+ i = 2
+ j = i ** 10
+ if (abs (j - 1024) .gt. del) call abort
+ j = i ** (-10)
+ if (abs (j - 0) .gt. del) call abort
+ j = i ** 0
+ if (abs (j - 1) .gt. del) call abort
+ i = 1
+ j = i ** 10
+ if (abs (j - 1) .gt. del) call abort
+ j = i ** (-10)
+ if (abs (j - 1) .gt. del) call abort
+ j = i ** 0
+ if (abs (j - 1) .gt. del) call abort
+ i = -1
+ j = i ** 10
+ if (abs (j - 1) .gt. del) call abort
+ j = i ** (-10)
+ if (abs (j - 1) .gt. del) call abort
+ j = i ** 0
+ if (abs (j - 1) .gt. del) call abort
+ j = i ** 11
+ if (abs (j - (-1)) .gt. del) call abort
+ j = i ** (-11)
+ if (abs (j - (-1)) .gt. del) call abort
+
+ c = (2.0, 3.0)
+ z = c ** 2
+ if (abs(z - (-5.0, 12.0)) .gt. del) call abort
+ z = c ** 7
+ if (abs(z - (6554.0, 4449.0)) .gt. del) call abort
two = 2.0
2004-05-18 Paul Brook <paul@codesourcery.com>
+ * Makefile.am (i_pow_c): Set it. Add build rule.
+ (gfor_built_src): Use it.
+ (m4_files): add m4/pow.m4.
+ * Makefile.in: Regenerate.
+ * m4/pow.m4: New file.
+ * generated/pow_*.c: Regenerate.
+
+2004-05-18 Paul Brook <paul@codesourcery.com>
+
* Makefile.am: Remove references to types.m4.
* m4/iparm.m4: Merge with types.m4.
* m4/types.m4: Remove.
generated/set_exponent_r4.c \
generated/set_exponent_r8.c
+i_pow_c = \
+generated/pow_i4_i4.c \
+generated/pow_i8_i4.c \
+generated/pow_r4_i4.c \
+generated/pow_r8_i4.c \
+generated/pow_c4_i4.c \
+generated/pow_c8_i4.c \
+generated/pow_i4_i8.c \
+generated/pow_i8_i8.c \
+generated/pow_r4_i8.c \
+generated/pow_r8_i8.c \
+generated/pow_c4_i8.c \
+generated/pow_c8_i8.c
+
m4_files= m4/iparm.m4 m4/ifunction.m4 m4/iforeach.m4 m4/all.m4 \
m4/any.m4 m4/count.m4 m4/maxloc0.m4 m4/maxloc1.m4 m4/maxval.m4 \
m4/minloc0.m4 m4/minloc1.m4 m4/minval.m4 m4/product.m4 m4/sum.m4 \
m4/ctrig.m4 m4/cexp.m4 m4/chyp.m4 m4/mtype.m4 \
m4/specific.m4 m4/specific2.m4 m4/head.m4 m4/shape.m4 m4/reshape.m4 \
m4/transpose.m4 m4/eoshift1.m4 m4/eoshift3.m4 m4/exponent.m4 \
- m4/fraction.m4 m4/nearest.m4 m4/set_exponent.m4
+ m4/fraction.m4 m4/nearest.m4 m4/set_exponent.m4 m4/pow.m4
gfor_built_src= $(i_all_c) $(i_any_c) $(i_count_c) $(i_maxloc0_c) \
$(i_maxloc1_c) $(i_maxval_c) $(i_minloc0_c) $(i_minloc1_c) $(i_minval_c) \
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$(i_matmul_c) $(i_matmull_c) $(i_transpose_c) $(i_shape_c) $(i_eoshift1_c) \
$(i_eoshift3_c) $(i_cshift1_c) $(i_reshape_c) $(in_pack_c) $(in_unpack_c) \
- $(i_exponent_c) $(i_fraction_c) $(i_nearest_c) $(i_set_exponent_c)
+ $(i_exponent_c) $(i_fraction_c) $(i_nearest_c) $(i_set_exponent_c) \
+ $(i_pow_c)
# We only use these if libm doesn't contain complex math functions.
$(i_set_exponent_c): m4/set_exponent.m4 m4/mtype.m4
m4 -Dfile=$@ -I$(srcdir)/m4 set_exponent.m4 > $@
+$(i_pow_c): m4/pow.m4 $(I_M4_DEPS)
+ m4 -Dfile=$@ -I$(srcdir)/m4 pow.m4 > $@
+
$(gfor_math_trig_c): m4/ctrig.m4 m4/mtype.m4
m4 -Dfile=$@ -I$(srcdir)/m4 ctrig.m4 > $@
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-am__objects_30 = $(am__objects_2) $(am__objects_3) $(am__objects_4) \
+am__objects_30 = pow_i4_i4.lo pow_i8_i4.lo pow_r4_i4.lo pow_r8_i4.lo \
+ pow_c4_i4.lo pow_c8_i4.lo pow_i4_i8.lo pow_i8_i8.lo \
+ pow_r4_i8.lo pow_r8_i8.lo pow_c4_i8.lo pow_c8_i8.lo
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+am__objects_32 = backspace.lo close.lo endfile.lo format.lo inquire.lo \
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@AMDEP_TRUE@ ./$(DEPDIR)/pack_generic.Plo ./$(DEPDIR)/pause.Plo \
+@AMDEP_TRUE@ ./$(DEPDIR)/pow_c4_i4.Plo \
+@AMDEP_TRUE@ ./$(DEPDIR)/pow_c4_i8.Plo \
+@AMDEP_TRUE@ ./$(DEPDIR)/pow_c8_i4.Plo \
+@AMDEP_TRUE@ ./$(DEPDIR)/pow_c8_i8.Plo \
+@AMDEP_TRUE@ ./$(DEPDIR)/pow_i4_i4.Plo \
+@AMDEP_TRUE@ ./$(DEPDIR)/pow_i4_i8.Plo \
+@AMDEP_TRUE@ ./$(DEPDIR)/pow_i8_i4.Plo \
+@AMDEP_TRUE@ ./$(DEPDIR)/pow_i8_i8.Plo \
+@AMDEP_TRUE@ ./$(DEPDIR)/pow_r4_i4.Plo \
+@AMDEP_TRUE@ ./$(DEPDIR)/pow_r4_i8.Plo \
+@AMDEP_TRUE@ ./$(DEPDIR)/pow_r8_i4.Plo \
+@AMDEP_TRUE@ ./$(DEPDIR)/pow_r8_i8.Plo \
@AMDEP_TRUE@ ./$(DEPDIR)/product_c4.Plo \
@AMDEP_TRUE@ ./$(DEPDIR)/product_c8.Plo \
@AMDEP_TRUE@ ./$(DEPDIR)/product_i4.Plo \
generated/set_exponent_r4.c \
generated/set_exponent_r8.c
+i_pow_c = \
+generated/pow_i4_i4.c \
+generated/pow_i8_i4.c \
+generated/pow_r4_i4.c \
+generated/pow_r8_i4.c \
+generated/pow_c4_i4.c \
+generated/pow_c8_i4.c \
+generated/pow_i4_i8.c \
+generated/pow_i8_i8.c \
+generated/pow_r4_i8.c \
+generated/pow_r8_i8.c \
+generated/pow_c4_i8.c \
+generated/pow_c8_i8.c
+
m4_files = m4/iparm.m4 m4/ifunction.m4 m4/iforeach.m4 m4/all.m4 \
m4/any.m4 m4/count.m4 m4/maxloc0.m4 m4/maxloc1.m4 m4/maxval.m4 \
m4/minloc0.m4 m4/minloc1.m4 m4/minval.m4 m4/product.m4 m4/sum.m4 \
m4/ctrig.m4 m4/cexp.m4 m4/chyp.m4 m4/mtype.m4 \
m4/specific.m4 m4/specific2.m4 m4/head.m4 m4/shape.m4 m4/reshape.m4 \
m4/transpose.m4 m4/eoshift1.m4 m4/eoshift3.m4 m4/exponent.m4 \
- m4/fraction.m4 m4/nearest.m4 m4/set_exponent.m4
+ m4/fraction.m4 m4/nearest.m4 m4/set_exponent.m4 m4/pow.m4
gfor_built_src = $(i_all_c) $(i_any_c) $(i_count_c) $(i_maxloc0_c) \
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- $(i_exponent_c) $(i_fraction_c) $(i_nearest_c) $(i_set_exponent_c)
+ $(i_exponent_c) $(i_fraction_c) $(i_nearest_c) $(i_set_exponent_c) \
+ $(i_pow_c)
# We only use these if libm doesn't contain complex math functions.
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/open.Plo@am__quote@
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@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/pause.Plo@am__quote@
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@MAINTAINER_MODE_TRUE@$(i_set_exponent_c): m4/set_exponent.m4 m4/mtype.m4
@MAINTAINER_MODE_TRUE@ m4 -Dfile=$@ -I$(srcdir)/m4 set_exponent.m4 > $@
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--- /dev/null
+/* Support routines for the intrinsic power (**) operator.
+ Copyright 2004 Free Software Foundation, Inc.
+ Contributed by Paul Brook
+
+This file is part of the GNU Fortran 95 runtime library (libgfor).
+
+Libgfor is free software; you can redistribute it and/or
+modify it under the terms of the GNU Lesser General Public
+License as published by the Free Software Foundation; either
+version 2.1 of the License, or (at your option) any later version.
+
+Ligbfor is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public
+License along with libgfor; see the file COPYING.LIB. If not,
+write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
+
+#include "config.h"
+#include "libgfortran.h"
+
+/* Uuse Binary Method to calculate the powi. This is not an optimal but
+ a simple and reasonable arithmetic. See section 4.6.3, "Evaluation of
+ Powers" of Donald E. Knuth, "Seminumerical Algorithms", Vol. 2, "The Art
+ of Computer Programming", 3rd Edition, 1998. */
+
+GFC_COMPLEX_4
+prefix(pow_c4_i4) (GFC_COMPLEX_4 a, GFC_INTEGER_4 b)
+{
+ GFC_COMPLEX_4 pow, x;
+ GFC_INTEGER_4 n, u;
+
+ n = b;
+ x = a;
+ pow = 1;
+ if (n != 0)
+ {
+ if (n < 0)
+ {
+
+ n = -n;
+ x = pow / x;
+ }
+ u = n;
+ for (;;)
+ {
+ if (u & 1)
+ pow *= x;
+ u >>= 1;
+ if (u)
+ x *= x;
+ else
+ break;
+ }
+ }
+ return pow;
+}
--- /dev/null
+/* Support routines for the intrinsic power (**) operator.
+ Copyright 2004 Free Software Foundation, Inc.
+ Contributed by Paul Brook
+
+This file is part of the GNU Fortran 95 runtime library (libgfor).
+
+Libgfor is free software; you can redistribute it and/or
+modify it under the terms of the GNU Lesser General Public
+License as published by the Free Software Foundation; either
+version 2.1 of the License, or (at your option) any later version.
+
+Ligbfor is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public
+License along with libgfor; see the file COPYING.LIB. If not,
+write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
+
+#include "config.h"
+#include "libgfortran.h"
+
+/* Uuse Binary Method to calculate the powi. This is not an optimal but
+ a simple and reasonable arithmetic. See section 4.6.3, "Evaluation of
+ Powers" of Donald E. Knuth, "Seminumerical Algorithms", Vol. 2, "The Art
+ of Computer Programming", 3rd Edition, 1998. */
+
+GFC_COMPLEX_4
+prefix(pow_c4_i8) (GFC_COMPLEX_4 a, GFC_INTEGER_8 b)
+{
+ GFC_COMPLEX_4 pow, x;
+ GFC_INTEGER_8 n, u;
+
+ n = b;
+ x = a;
+ pow = 1;
+ if (n != 0)
+ {
+ if (n < 0)
+ {
+
+ n = -n;
+ x = pow / x;
+ }
+ u = n;
+ for (;;)
+ {
+ if (u & 1)
+ pow *= x;
+ u >>= 1;
+ if (u)
+ x *= x;
+ else
+ break;
+ }
+ }
+ return pow;
+}
--- /dev/null
+/* Support routines for the intrinsic power (**) operator.
+ Copyright 2004 Free Software Foundation, Inc.
+ Contributed by Paul Brook
+
+This file is part of the GNU Fortran 95 runtime library (libgfor).
+
+Libgfor is free software; you can redistribute it and/or
+modify it under the terms of the GNU Lesser General Public
+License as published by the Free Software Foundation; either
+version 2.1 of the License, or (at your option) any later version.
+
+Ligbfor is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public
+License along with libgfor; see the file COPYING.LIB. If not,
+write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
+
+#include "config.h"
+#include "libgfortran.h"
+
+/* Uuse Binary Method to calculate the powi. This is not an optimal but
+ a simple and reasonable arithmetic. See section 4.6.3, "Evaluation of
+ Powers" of Donald E. Knuth, "Seminumerical Algorithms", Vol. 2, "The Art
+ of Computer Programming", 3rd Edition, 1998. */
+
+GFC_COMPLEX_8
+prefix(pow_c8_i4) (GFC_COMPLEX_8 a, GFC_INTEGER_4 b)
+{
+ GFC_COMPLEX_8 pow, x;
+ GFC_INTEGER_4 n, u;
+
+ n = b;
+ x = a;
+ pow = 1;
+ if (n != 0)
+ {
+ if (n < 0)
+ {
+
+ n = -n;
+ x = pow / x;
+ }
+ u = n;
+ for (;;)
+ {
+ if (u & 1)
+ pow *= x;
+ u >>= 1;
+ if (u)
+ x *= x;
+ else
+ break;
+ }
+ }
+ return pow;
+}
--- /dev/null
+/* Support routines for the intrinsic power (**) operator.
+ Copyright 2004 Free Software Foundation, Inc.
+ Contributed by Paul Brook
+
+This file is part of the GNU Fortran 95 runtime library (libgfor).
+
+Libgfor is free software; you can redistribute it and/or
+modify it under the terms of the GNU Lesser General Public
+License as published by the Free Software Foundation; either
+version 2.1 of the License, or (at your option) any later version.
+
+Ligbfor is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public
+License along with libgfor; see the file COPYING.LIB. If not,
+write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
+
+#include "config.h"
+#include "libgfortran.h"
+
+/* Uuse Binary Method to calculate the powi. This is not an optimal but
+ a simple and reasonable arithmetic. See section 4.6.3, "Evaluation of
+ Powers" of Donald E. Knuth, "Seminumerical Algorithms", Vol. 2, "The Art
+ of Computer Programming", 3rd Edition, 1998. */
+
+GFC_COMPLEX_8
+prefix(pow_c8_i8) (GFC_COMPLEX_8 a, GFC_INTEGER_8 b)
+{
+ GFC_COMPLEX_8 pow, x;
+ GFC_INTEGER_8 n, u;
+
+ n = b;
+ x = a;
+ pow = 1;
+ if (n != 0)
+ {
+ if (n < 0)
+ {
+
+ n = -n;
+ x = pow / x;
+ }
+ u = n;
+ for (;;)
+ {
+ if (u & 1)
+ pow *= x;
+ u >>= 1;
+ if (u)
+ x *= x;
+ else
+ break;
+ }
+ }
+ return pow;
+}
--- /dev/null
+/* Support routines for the intrinsic power (**) operator.
+ Copyright 2004 Free Software Foundation, Inc.
+ Contributed by Paul Brook
+
+This file is part of the GNU Fortran 95 runtime library (libgfor).
+
+Libgfor is free software; you can redistribute it and/or
+modify it under the terms of the GNU Lesser General Public
+License as published by the Free Software Foundation; either
+version 2.1 of the License, or (at your option) any later version.
+
+Ligbfor is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public
+License along with libgfor; see the file COPYING.LIB. If not,
+write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
+
+#include "config.h"
+#include "libgfortran.h"
+
+/* Uuse Binary Method to calculate the powi. This is not an optimal but
+ a simple and reasonable arithmetic. See section 4.6.3, "Evaluation of
+ Powers" of Donald E. Knuth, "Seminumerical Algorithms", Vol. 2, "The Art
+ of Computer Programming", 3rd Edition, 1998. */
+
+GFC_INTEGER_4
+prefix(pow_i4_i4) (GFC_INTEGER_4 a, GFC_INTEGER_4 b)
+{
+ GFC_INTEGER_4 pow, x;
+ GFC_INTEGER_4 n, u;
+
+ n = b;
+ x = a;
+ pow = 1;
+ if (n != 0)
+ {
+ if (n < 0)
+ {
+ if (x == 1)
+ return 1;
+ if (x == -1)
+ return (n & 1) ? -1 : 1;
+ return (x == 0) ? 1 / x : 0;
+ }
+ u = n;
+ for (;;)
+ {
+ if (u & 1)
+ pow *= x;
+ u >>= 1;
+ if (u)
+ x *= x;
+ else
+ break;
+ }
+ }
+ return pow;
+}
--- /dev/null
+/* Support routines for the intrinsic power (**) operator.
+ Copyright 2004 Free Software Foundation, Inc.
+ Contributed by Paul Brook
+
+This file is part of the GNU Fortran 95 runtime library (libgfor).
+
+Libgfor is free software; you can redistribute it and/or
+modify it under the terms of the GNU Lesser General Public
+License as published by the Free Software Foundation; either
+version 2.1 of the License, or (at your option) any later version.
+
+Ligbfor is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public
+License along with libgfor; see the file COPYING.LIB. If not,
+write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
+
+#include "config.h"
+#include "libgfortran.h"
+
+/* Uuse Binary Method to calculate the powi. This is not an optimal but
+ a simple and reasonable arithmetic. See section 4.6.3, "Evaluation of
+ Powers" of Donald E. Knuth, "Seminumerical Algorithms", Vol. 2, "The Art
+ of Computer Programming", 3rd Edition, 1998. */
+
+GFC_INTEGER_4
+prefix(pow_i4_i8) (GFC_INTEGER_4 a, GFC_INTEGER_8 b)
+{
+ GFC_INTEGER_4 pow, x;
+ GFC_INTEGER_8 n, u;
+
+ n = b;
+ x = a;
+ pow = 1;
+ if (n != 0)
+ {
+ if (n < 0)
+ {
+ if (x == 1)
+ return 1;
+ if (x == -1)
+ return (n & 1) ? -1 : 1;
+ return (x == 0) ? 1 / x : 0;
+ }
+ u = n;
+ for (;;)
+ {
+ if (u & 1)
+ pow *= x;
+ u >>= 1;
+ if (u)
+ x *= x;
+ else
+ break;
+ }
+ }
+ return pow;
+}
--- /dev/null
+/* Support routines for the intrinsic power (**) operator.
+ Copyright 2004 Free Software Foundation, Inc.
+ Contributed by Paul Brook
+
+This file is part of the GNU Fortran 95 runtime library (libgfor).
+
+Libgfor is free software; you can redistribute it and/or
+modify it under the terms of the GNU Lesser General Public
+License as published by the Free Software Foundation; either
+version 2.1 of the License, or (at your option) any later version.
+
+Ligbfor is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public
+License along with libgfor; see the file COPYING.LIB. If not,
+write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
+
+#include "config.h"
+#include "libgfortran.h"
+
+/* Uuse Binary Method to calculate the powi. This is not an optimal but
+ a simple and reasonable arithmetic. See section 4.6.3, "Evaluation of
+ Powers" of Donald E. Knuth, "Seminumerical Algorithms", Vol. 2, "The Art
+ of Computer Programming", 3rd Edition, 1998. */
+
+GFC_INTEGER_8
+prefix(pow_i8_i4) (GFC_INTEGER_8 a, GFC_INTEGER_4 b)
+{
+ GFC_INTEGER_8 pow, x;
+ GFC_INTEGER_4 n, u;
+
+ n = b;
+ x = a;
+ pow = 1;
+ if (n != 0)
+ {
+ if (n < 0)
+ {
+ if (x == 1)
+ return 1;
+ if (x == -1)
+ return (n & 1) ? -1 : 1;
+ return (x == 0) ? 1 / x : 0;
+ }
+ u = n;
+ for (;;)
+ {
+ if (u & 1)
+ pow *= x;
+ u >>= 1;
+ if (u)
+ x *= x;
+ else
+ break;
+ }
+ }
+ return pow;
+}
--- /dev/null
+/* Support routines for the intrinsic power (**) operator.
+ Copyright 2004 Free Software Foundation, Inc.
+ Contributed by Paul Brook
+
+This file is part of the GNU Fortran 95 runtime library (libgfor).
+
+Libgfor is free software; you can redistribute it and/or
+modify it under the terms of the GNU Lesser General Public
+License as published by the Free Software Foundation; either
+version 2.1 of the License, or (at your option) any later version.
+
+Ligbfor is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public
+License along with libgfor; see the file COPYING.LIB. If not,
+write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
+
+#include "config.h"
+#include "libgfortran.h"
+
+/* Uuse Binary Method to calculate the powi. This is not an optimal but
+ a simple and reasonable arithmetic. See section 4.6.3, "Evaluation of
+ Powers" of Donald E. Knuth, "Seminumerical Algorithms", Vol. 2, "The Art
+ of Computer Programming", 3rd Edition, 1998. */
+
+GFC_INTEGER_8
+prefix(pow_i8_i8) (GFC_INTEGER_8 a, GFC_INTEGER_8 b)
+{
+ GFC_INTEGER_8 pow, x;
+ GFC_INTEGER_8 n, u;
+
+ n = b;
+ x = a;
+ pow = 1;
+ if (n != 0)
+ {
+ if (n < 0)
+ {
+ if (x == 1)
+ return 1;
+ if (x == -1)
+ return (n & 1) ? -1 : 1;
+ return (x == 0) ? 1 / x : 0;
+ }
+ u = n;
+ for (;;)
+ {
+ if (u & 1)
+ pow *= x;
+ u >>= 1;
+ if (u)
+ x *= x;
+ else
+ break;
+ }
+ }
+ return pow;
+}
--- /dev/null
+/* Support routines for the intrinsic power (**) operator.
+ Copyright 2004 Free Software Foundation, Inc.
+ Contributed by Paul Brook
+
+This file is part of the GNU Fortran 95 runtime library (libgfor).
+
+Libgfor is free software; you can redistribute it and/or
+modify it under the terms of the GNU Lesser General Public
+License as published by the Free Software Foundation; either
+version 2.1 of the License, or (at your option) any later version.
+
+Ligbfor is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public
+License along with libgfor; see the file COPYING.LIB. If not,
+write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
+
+#include "config.h"
+#include "libgfortran.h"
+
+/* Uuse Binary Method to calculate the powi. This is not an optimal but
+ a simple and reasonable arithmetic. See section 4.6.3, "Evaluation of
+ Powers" of Donald E. Knuth, "Seminumerical Algorithms", Vol. 2, "The Art
+ of Computer Programming", 3rd Edition, 1998. */
+
+GFC_REAL_4
+prefix(pow_r4_i4) (GFC_REAL_4 a, GFC_INTEGER_4 b)
+{
+ GFC_REAL_4 pow, x;
+ GFC_INTEGER_4 n, u;
+
+ n = b;
+ x = a;
+ pow = 1;
+ if (n != 0)
+ {
+ if (n < 0)
+ {
+
+ n = -n;
+ x = pow / x;
+ }
+ u = n;
+ for (;;)
+ {
+ if (u & 1)
+ pow *= x;
+ u >>= 1;
+ if (u)
+ x *= x;
+ else
+ break;
+ }
+ }
+ return pow;
+}
--- /dev/null
+/* Support routines for the intrinsic power (**) operator.
+ Copyright 2004 Free Software Foundation, Inc.
+ Contributed by Paul Brook
+
+This file is part of the GNU Fortran 95 runtime library (libgfor).
+
+Libgfor is free software; you can redistribute it and/or
+modify it under the terms of the GNU Lesser General Public
+License as published by the Free Software Foundation; either
+version 2.1 of the License, or (at your option) any later version.
+
+Ligbfor is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public
+License along with libgfor; see the file COPYING.LIB. If not,
+write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
+
+#include "config.h"
+#include "libgfortran.h"
+
+/* Uuse Binary Method to calculate the powi. This is not an optimal but
+ a simple and reasonable arithmetic. See section 4.6.3, "Evaluation of
+ Powers" of Donald E. Knuth, "Seminumerical Algorithms", Vol. 2, "The Art
+ of Computer Programming", 3rd Edition, 1998. */
+
+GFC_REAL_4
+prefix(pow_r4_i8) (GFC_REAL_4 a, GFC_INTEGER_8 b)
+{
+ GFC_REAL_4 pow, x;
+ GFC_INTEGER_8 n, u;
+
+ n = b;
+ x = a;
+ pow = 1;
+ if (n != 0)
+ {
+ if (n < 0)
+ {
+
+ n = -n;
+ x = pow / x;
+ }
+ u = n;
+ for (;;)
+ {
+ if (u & 1)
+ pow *= x;
+ u >>= 1;
+ if (u)
+ x *= x;
+ else
+ break;
+ }
+ }
+ return pow;
+}
--- /dev/null
+/* Support routines for the intrinsic power (**) operator.
+ Copyright 2004 Free Software Foundation, Inc.
+ Contributed by Paul Brook
+
+This file is part of the GNU Fortran 95 runtime library (libgfor).
+
+Libgfor is free software; you can redistribute it and/or
+modify it under the terms of the GNU Lesser General Public
+License as published by the Free Software Foundation; either
+version 2.1 of the License, or (at your option) any later version.
+
+Ligbfor is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public
+License along with libgfor; see the file COPYING.LIB. If not,
+write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
+
+#include "config.h"
+#include "libgfortran.h"
+
+/* Uuse Binary Method to calculate the powi. This is not an optimal but
+ a simple and reasonable arithmetic. See section 4.6.3, "Evaluation of
+ Powers" of Donald E. Knuth, "Seminumerical Algorithms", Vol. 2, "The Art
+ of Computer Programming", 3rd Edition, 1998. */
+
+GFC_REAL_8
+prefix(pow_r8_i4) (GFC_REAL_8 a, GFC_INTEGER_4 b)
+{
+ GFC_REAL_8 pow, x;
+ GFC_INTEGER_4 n, u;
+
+ n = b;
+ x = a;
+ pow = 1;
+ if (n != 0)
+ {
+ if (n < 0)
+ {
+
+ n = -n;
+ x = pow / x;
+ }
+ u = n;
+ for (;;)
+ {
+ if (u & 1)
+ pow *= x;
+ u >>= 1;
+ if (u)
+ x *= x;
+ else
+ break;
+ }
+ }
+ return pow;
+}
--- /dev/null
+/* Support routines for the intrinsic power (**) operator.
+ Copyright 2004 Free Software Foundation, Inc.
+ Contributed by Paul Brook
+
+This file is part of the GNU Fortran 95 runtime library (libgfor).
+
+Libgfor is free software; you can redistribute it and/or
+modify it under the terms of the GNU Lesser General Public
+License as published by the Free Software Foundation; either
+version 2.1 of the License, or (at your option) any later version.
+
+Ligbfor is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public
+License along with libgfor; see the file COPYING.LIB. If not,
+write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
+
+#include "config.h"
+#include "libgfortran.h"
+
+/* Uuse Binary Method to calculate the powi. This is not an optimal but
+ a simple and reasonable arithmetic. See section 4.6.3, "Evaluation of
+ Powers" of Donald E. Knuth, "Seminumerical Algorithms", Vol. 2, "The Art
+ of Computer Programming", 3rd Edition, 1998. */
+
+GFC_REAL_8
+prefix(pow_r8_i8) (GFC_REAL_8 a, GFC_INTEGER_8 b)
+{
+ GFC_REAL_8 pow, x;
+ GFC_INTEGER_8 n, u;
+
+ n = b;
+ x = a;
+ pow = 1;
+ if (n != 0)
+ {
+ if (n < 0)
+ {
+
+ n = -n;
+ x = pow / x;
+ }
+ u = n;
+ for (;;)
+ {
+ if (u & 1)
+ pow *= x;
+ u >>= 1;
+ if (u)
+ x *= x;
+ else
+ break;
+ }
+ }
+ return pow;
+}
--- /dev/null
+`/* Support routines for the intrinsic power (**) operator.
+ Copyright 2004 Free Software Foundation, Inc.
+ Contributed by Paul Brook
+
+This file is part of the GNU Fortran 95 runtime library (libgfor).
+
+Libgfor is free software; you can redistribute it and/or
+modify it under the terms of the GNU Lesser General Public
+License as published by the Free Software Foundation; either
+version 2.1 of the License, or (at your option) any later version.
+
+Ligbfor is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public
+License along with libgfor; see the file COPYING.LIB. If not,
+write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
+
+#include "config.h"
+#include "libgfortran.h"'
+include(iparm.m4)dnl
+
+/* Uuse Binary Method to calculate the powi. This is not an optimal but
+ a simple and reasonable arithmetic. See section 4.6.3, "Evaluation of
+ Powers" of Donald E. Knuth, "Seminumerical Algorithms", Vol. 2, "The Art
+ of Computer Programming", 3rd Edition, 1998. */
+
+rtype_name
+`prefix(pow_'rtype_code`_'atype_code) (rtype_name a, atype_name b)
+{
+ rtype_name pow, x;
+ atype_name n, u;
+
+ n = b;
+ x = a;
+ pow = 1;
+ if (n != 0)
+ {
+ if (n < 0)
+ {
+ifelse(rtype_letter,i,`dnl
+ if (x == 1)
+ return 1;
+ if (x == -1)
+ return (n & 1) ? -1 : 1;
+ return (x == 0) ? 1 / x : 0;
+',`
+ n = -n;
+ x = pow / x;
+')dnl
+ }
+ u = n;
+ for (;;)
+ {
+ if (u & 1)
+ pow *= x;
+ u >>= 1;
+ if (u)
+ x *= x;
+ else
+ break;
+ }
+ }
+ return pow;
+}
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