From 317dbf4613ebf56ca14ee70c1ad6e620ad7942c2 Mon Sep 17 00:00:00 2001 From: Eric Anholt Date: Mon, 11 Oct 2010 13:38:38 -0700 Subject: [PATCH] i965: Don't compute-to-MRF in gen6 math instructions. --- src/mesa/drivers/dri/i965/brw_fs.cpp | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/src/mesa/drivers/dri/i965/brw_fs.cpp b/src/mesa/drivers/dri/i965/brw_fs.cpp index 0f1f4fa26ef..0353bb54e72 100644 --- a/src/mesa/drivers/dri/i965/brw_fs.cpp +++ b/src/mesa/drivers/dri/i965/brw_fs.cpp @@ -2616,6 +2616,22 @@ fs_visitor::compute_to_mrf() if (scan_inst->mlen) break; + if (intel->gen >= 6) { + /* gen6 math instructions must have the destination be + * GRF, so no compute-to-MRF for them. + */ + if (scan_inst->opcode == FS_OPCODE_RCP || + scan_inst->opcode == FS_OPCODE_RSQ || + scan_inst->opcode == FS_OPCODE_SQRT || + scan_inst->opcode == FS_OPCODE_EXP2 || + scan_inst->opcode == FS_OPCODE_LOG2 || + scan_inst->opcode == FS_OPCODE_SIN || + scan_inst->opcode == FS_OPCODE_COS || + scan_inst->opcode == FS_OPCODE_POW) { + break; + } + } + if (scan_inst->dst.reg_offset == inst->src[0].reg_offset) { /* Found the creator of our MRF's source value. */ found = true; -- 2.30.2