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authorJuha-Pekka Heikkila <[email protected]>2014-03-28 15:28:32 +0200
committerMatt Turner <[email protected]>2014-04-16 22:46:45 -0700
commitda0c3b02e71c7552ba9324a01a73602094105fcc (patch)
tree2c824fff74dfc48f1a6a058eacfd797e770865d3
parent2dfbbeca50b95ccdd714d9baa4411c779f6a20d9 (diff)
i965/fs: Add support for the MAC instruction.
This allows us to generate the MAC (multiply-accumulate) instruction, which can be used to implement some expressions in fewer instructions than doing a series of MUL and ADDs. Reviewed-by: Kenneth Graunke <[email protected]> Reviewed-by: Matt Turner <[email protected]> Signed-off-by: Juha-Pekka Heikkila <[email protected]>
-rw-r--r--src/mesa/drivers/dri/i965/brw_fs.cpp1
-rw-r--r--src/mesa/drivers/dri/i965/brw_fs_generator.cpp3
2 files changed, 4 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_fs.cpp b/src/mesa/drivers/dri/i965/brw_fs.cpp
index 075857f7425..c550c412229 100644
--- a/src/mesa/drivers/dri/i965/brw_fs.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs.cpp
@@ -196,6 +196,7 @@ ALU3(MAD)
ALU2_ACC(ADDC)
ALU2_ACC(SUBB)
ALU2(SEL)
+ALU2(MAC)
/** Gen4 predicated IF. */
fs_inst *
diff --git a/src/mesa/drivers/dri/i965/brw_fs_generator.cpp b/src/mesa/drivers/dri/i965/brw_fs_generator.cpp
index 1cf35b40ad2..c6b4aae4087 100644
--- a/src/mesa/drivers/dri/i965/brw_fs_generator.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs_generator.cpp
@@ -1545,6 +1545,9 @@ fs_generator::generate_code(exec_list *instructions, FILE *dump_file)
assert(brw->gen >= 7);
brw_SUBB(p, dst, src[0], src[1]);
break;
+ case BRW_OPCODE_MAC:
+ brw_MAC(p, dst, src[0], src[1]);
+ break;
case BRW_OPCODE_BFE:
assert(brw->gen >= 7);