From 56ac25918aea37a3c2c52f99fc285f2475be9128 Mon Sep 17 00:00:00 2001 From: Matt Turner Date: Fri, 21 Nov 2014 12:20:53 -0800 Subject: [PATCH] i965: Don't overwrite the math function with conditional mod. Ben was asking about the undocumented restriction that the math instruction cannot use the dependency control hints. I went to reconfirm and disabled the is_math() check in opt_set_dependency_control() and saw that the disassembled math instructions with dependency hints had a bogus math function. We were mistakenly overwriting it by setting an empty conditional mod. Unfortunately, this wasn't the cause of the aforementioned problem (I reproduced it). This bug is benign, since we don't set dependeny hints on math instructions -- but maybe some day. Reviewed-by: Kenneth Graunke --- src/mesa/drivers/dri/i965/brw_fs_generator.cpp | 3 ++- src/mesa/drivers/dri/i965/brw_vec4_generator.cpp | 3 ++- 2 files changed, 4 insertions(+), 2 deletions(-) diff --git a/src/mesa/drivers/dri/i965/brw_fs_generator.cpp b/src/mesa/drivers/dri/i965/brw_fs_generator.cpp index 4af9cbe83cb..06b0f347ae4 100644 --- a/src/mesa/drivers/dri/i965/brw_fs_generator.cpp +++ b/src/mesa/drivers/dri/i965/brw_fs_generator.cpp @@ -2010,7 +2010,8 @@ fs_generator::generate_code(const cfg_t *cfg, int dispatch_width) brw_inst *last = &p->store[last_insn_offset / 16]; - brw_inst_set_cond_modifier(brw, last, inst->conditional_mod); + if (inst->conditional_mod) + brw_inst_set_cond_modifier(brw, last, inst->conditional_mod); brw_inst_set_no_dd_clear(brw, last, inst->no_dd_clear); brw_inst_set_no_dd_check(brw, last, inst->no_dd_check); } diff --git a/src/mesa/drivers/dri/i965/brw_vec4_generator.cpp b/src/mesa/drivers/dri/i965/brw_vec4_generator.cpp index d027fda85de..6a70a2f3839 100644 --- a/src/mesa/drivers/dri/i965/brw_vec4_generator.cpp +++ b/src/mesa/drivers/dri/i965/brw_vec4_generator.cpp @@ -1509,7 +1509,8 @@ vec4_generator::generate_code(const cfg_t *cfg) brw_inst *last = &p->store[pre_emit_nr_insn]; - brw_inst_set_cond_modifier(brw, last, inst->conditional_mod); + if (inst->conditional_mod) + brw_inst_set_cond_modifier(brw, last, inst->conditional_mod); brw_inst_set_no_dd_clear(brw, last, inst->no_dd_clear); brw_inst_set_no_dd_check(brw, last, inst->no_dd_check); } -- 2.30.2