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| author | Ian Romanick <ian.d.romanick@intel.com> | 2016-06-21 15:14:03 -0700 |
|---|---|---|
| committer | Ian Romanick <ian.d.romanick@intel.com> | 2016-07-19 12:19:29 -0700 |
| commit | de20086eed47e6bfe7c25835d72383114f99c7a9 (patch) | |
| tree | e39a73795c12c7694c544954f0dedd3002d9b532 /src/mesa/drivers/dri/i965/brw_vec4_generator.cpp | |
| parent | 26c7f04d4a55b694623a389a564c9516d91c0026 (diff) | |
| download | external_mesa3d-de20086eed47e6bfe7c25835d72383114f99c7a9.zip external_mesa3d-de20086eed47e6bfe7c25835d72383114f99c7a9.tar.gz external_mesa3d-de20086eed47e6bfe7c25835d72383114f99c7a9.tar.bz2 | |
i965: Use LZD to implement nir_op_ufind_msb
This uses one less instruction.
v2: Move emit_find_msb_using_lzd out of the visitor classes. Suggested
by Curro.
Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Diffstat (limited to 'src/mesa/drivers/dri/i965/brw_vec4_generator.cpp')
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_vec4_generator.cpp | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_vec4_generator.cpp b/src/mesa/drivers/dri/i965/brw_vec4_generator.cpp index 3878c4a..7ad4f86 100644 --- a/src/mesa/drivers/dri/i965/brw_vec4_generator.cpp +++ b/src/mesa/drivers/dri/i965/brw_vec4_generator.cpp @@ -1637,6 +1637,9 @@ generate_code(struct brw_codegen *p, /* FBL only supports UD type for dst. */ brw_FBL(p, retype(dst, BRW_REGISTER_TYPE_UD), src[0]); break; + case BRW_OPCODE_LZD: + brw_LZD(p, dst, src[0]); + break; case BRW_OPCODE_CBIT: assert(devinfo->gen >= 7); /* CBIT only supports UD type for dst. */ |