Tue Jan 19 21:20:52 1999 Richard Henderson <rth@cygnus.com>
+ * recog.c (pop_operand): New function.
+ * recog.h (pop_operand): Declare it.
+ * genrecog.c (preds): Define it.
+
* expr.c (do_jump_for_compare): Handle conditional branch expanders
emitting multiple jump instructions.
* jump.c (condjump_label): New function.
{"nonmemory_operand", {CONST_INT, CONST_DOUBLE, CONST, SYMBOL_REF,
LABEL_REF, SUBREG, REG}},
{"push_operand", {MEM}},
+ {"pop_operand", {MEM}},
{"memory_operand", {SUBREG, MEM}},
{"indirect_operand", {SUBREG, MEM}},
{"comparison_operator", {EQ, NE, LE, LT, GE, GT, LEU, LTU, GEU, GTU}},
#endif
#endif
+#ifndef STACK_POP_CODE
+#ifdef STACK_GROWS_DOWNWARD
+#define STACK_POP_CODE POST_INC
+#else
+#define STACK_POP_CODE POST_DEC
+#endif
+#endif
+
static void validate_replace_rtx_1 PROTO((rtx *, rtx, rtx, rtx));
static rtx *find_single_use_1 PROTO((rtx, rtx *));
static rtx *find_constant_term_loc PROTO((rtx *));
return XEXP (op, 0) == stack_pointer_rtx;
}
+/* Return 1 if OP is a valid operand that stands for popping a
+ value of mode MODE off the stack.
+
+ The main use of this function is as a predicate in match_operand
+ expressions in the machine description. */
+
+int
+pop_operand (op, mode)
+ rtx op;
+ enum machine_mode mode;
+{
+ if (GET_CODE (op) != MEM)
+ return 0;
+
+ if (GET_MODE (op) != mode)
+ return 0;
+
+ op = XEXP (op, 0);
+
+ if (GET_CODE (op) != STACK_POP_CODE)
+ return 0;
+
+ return XEXP (op, 0) == stack_pointer_rtx;
+}
+
/* Return 1 if ADDR is a valid memory address for mode MODE. */
int
extern int nonimmediate_operand PROTO((rtx, enum machine_mode));
extern int nonmemory_operand PROTO((rtx, enum machine_mode));
extern int push_operand PROTO((rtx, enum machine_mode));
+extern int pop_operand PROTO((rtx, enum machine_mode));
extern int memory_operand PROTO((rtx, enum machine_mode));
extern int indirect_operand PROTO((rtx, enum machine_mode));
extern int mode_independent_operand PROTO((rtx, enum machine_mode));