diff options
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_fs.cpp | 9 | ||||
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_vec4.cpp | 5 |
2 files changed, 14 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_fs.cpp b/src/mesa/drivers/dri/i965/brw_fs.cpp index c7c6accebf6..0f1300c1cc6 100644 --- a/src/mesa/drivers/dri/i965/brw_fs.cpp +++ b/src/mesa/drivers/dri/i965/brw_fs.cpp @@ -2325,6 +2325,15 @@ fs_visitor::opt_algebraic() break; } + /* a * -1.0 = -a */ + if (inst->src[1].is_negative_one()) { + inst->opcode = BRW_OPCODE_MOV; + inst->src[0].negate = !inst->src[0].negate; + inst->src[1] = reg_undef; + progress = true; + break; + } + /* a * 0.0 = 0.0 */ if (inst->src[1].is_zero()) { inst->opcode = BRW_OPCODE_MOV; diff --git a/src/mesa/drivers/dri/i965/brw_vec4.cpp b/src/mesa/drivers/dri/i965/brw_vec4.cpp index fda8552d841..58828c3f320 100644 --- a/src/mesa/drivers/dri/i965/brw_vec4.cpp +++ b/src/mesa/drivers/dri/i965/brw_vec4.cpp @@ -725,6 +725,11 @@ vec4_visitor::opt_algebraic() inst->opcode = BRW_OPCODE_MOV; inst->src[1] = src_reg(); progress = true; + } else if (inst->src[1].is_negative_one()) { + inst->opcode = BRW_OPCODE_MOV; + inst->src[0].negate = !inst->src[0].negate; + inst->src[1] = src_reg(); + progress = true; } break; case BRW_OPCODE_CMP: |