i965/disasm: Wrap opcode_desc look-up in a function.

The function takes a device info struct as argument in addition to the
opcode number in order to disambiguate between multiple opcode_desc
entries for different instructions with the same opcode number.

Reviewed-by: Iago Toral Quiroga <[email protected]> [v1]

[v2] mattst88: Put brw_opcode_desc() in brw_eu.c instead of moving it
               there in a later patch.
Reviewed-by: Kenneth Graunke <[email protected]> [v2]
[v3] mattst88: Return NULL if opcode >= ARRAY_SIZE(opcode_descs)
Reviewed-by: Matt Turner <[email protected]>

1 files changed, 16 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/i965/brw_eu.c b/src/mesa/drivers/dri/i965/brw_eu.c
index 6961a88c6a8..279e9571e1a 100644
--- a/src/mesa/drivers/dri/i965/brw_eu.c
+++ b/src/mesa/drivers/dri/i965/brw_eu.c
@@ -339,3 +339,19 @@ brw_disassemble(const struct brw_device_info *devinfo,
       brw_disassemble_inst(out, devinfo, insn, compacted);
    }
 }
+
+/* Return the matching opcode_desc for the specified opcode number and
+ * hardware generation, or NULL if the opcode is not supported by the device.
+ * XXX -- Actually check whether the opcode is supported.
+ */
+const struct opcode_desc *
+brw_opcode_desc(const struct brw_device_info *devinfo, enum opcode opcode)
+{
+   if (opcode >= ARRAY_SIZE(opcode_descs))
+      return NULL;
+
+   if (opcode_descs[opcode].name)
+      return &opcode_descs[opcode];
+   else
+      return NULL;
+}