+TCGLabel *gen_new_label(void);
+
+/**
+ * label_arg
+ * @l: label
+ *
+ * Encode a label for storage in the TCG opcode stream.
+ */
+
+static inline TCGArg label_arg(TCGLabel *l)
+{
+ return (uintptr_t)l;
+}
+
+/**
+ * arg_label
+ * @i: value
+ *
+ * The opposite of label_arg. Retrieve a label from the
+ * encoding of the TCG opcode stream.
+ */
+
+static inline TCGLabel *arg_label(TCGArg i)
+{
+ return (TCGLabel *)(uintptr_t)i;
+}
+
+/**
+ * tcg_ptr_byte_diff
+ * @a, @b: addresses to be differenced
+ *
+ * There are many places within the TCG backends where we need a byte
+ * difference between two pointers. While this can be accomplished
+ * with local casting, it's easy to get wrong -- especially if one is
+ * concerned with the signedness of the result.
+ *
+ * This version relies on GCC's void pointer arithmetic to get the
+ * correct result.
+ */
+
+static inline ptrdiff_t tcg_ptr_byte_diff(void *a, void *b)
+{
+ return a - b;
+}
+
+/**
+ * tcg_pcrel_diff
+ * @s: the tcg context
+ * @target: address of the target
+ *
+ * Produce a pc-relative difference, from the current code_ptr
+ * to the destination address.
+ */
+
+static inline ptrdiff_t tcg_pcrel_diff(TCGContext *s, void *target)
+{
+ return tcg_ptr_byte_diff(target, s->code_ptr);
+}
+
+/**
+ * tcg_current_code_size
+ * @s: the tcg context
+ *
+ * Compute the current code size within the translation block.
+ * This is used to fill in qemu's data structures for goto_tb.
+ */
+
+static inline size_t tcg_current_code_size(TCGContext *s)
+{
+ return tcg_ptr_byte_diff(s->code_ptr, s->code_buf);
+}
+
+/* Combine the TCGMemOp and mmu_idx parameters into a single value. */
+typedef uint32_t TCGMemOpIdx;
+
+/**
+ * make_memop_idx
+ * @op: memory operation
+ * @idx: mmu index
+ *
+ * Encode these values into a single parameter.
+ */
+static inline TCGMemOpIdx make_memop_idx(TCGMemOp op, unsigned idx)
+{
+ tcg_debug_assert(idx <= 15);
+ return (op << 4) | idx;
+}
+
+/**
+ * get_memop
+ * @oi: combined op/idx parameter
+ *
+ * Extract the memory operation from the combined value.
+ */
+static inline TCGMemOp get_memop(TCGMemOpIdx oi)
+{
+ return oi >> 4;
+}
+
+/**
+ * get_mmuidx
+ * @oi: combined op/idx parameter
+ *
+ * Extract the mmu index from the combined value.
+ */
+static inline unsigned get_mmuidx(TCGMemOpIdx oi)
+{
+ return oi & 15;
+}
+
projects / qemu.git / blobdiff