From 94e7b59a75fc2ecc51a74196f6cd198546603b85 Mon Sep 17 00:00:00 2001 From: Matt Turner Date: Mon, 5 Jan 2015 13:51:03 -0800 Subject: [PATCH] i965: Convert CMP.GE -(abs)reg 0 -> CMP.Z reg 0. total instructions in shared programs: 5952059 -> 5951603 (-0.01%) instructions in affected programs: 138812 -> 138356 (-0.33%) GAINED: 1 LOST: 0 Reviewed-by: Kenneth Graunke --- src/mesa/drivers/dri/i965/brw_fs.cpp | 12 ++++++++++++ src/mesa/drivers/dri/i965/brw_vec4.cpp | 12 ++++++++++++ 2 files changed, 24 insertions(+) diff --git a/src/mesa/drivers/dri/i965/brw_fs.cpp b/src/mesa/drivers/dri/i965/brw_fs.cpp index 7280b6bac26..0ada5837cfd 100644 --- a/src/mesa/drivers/dri/i965/brw_fs.cpp +++ b/src/mesa/drivers/dri/i965/brw_fs.cpp @@ -2367,6 +2367,18 @@ fs_visitor::opt_algebraic() break; } break; + case BRW_OPCODE_CMP: + if (inst->conditional_mod == BRW_CONDITIONAL_GE && + inst->src[0].abs && + inst->src[0].negate && + inst->src[1].is_zero()) { + inst->src[0].abs = false; + inst->src[0].negate = false; + inst->conditional_mod = BRW_CONDITIONAL_Z; + progress = true; + break; + } + break; case BRW_OPCODE_SEL: if (inst->src[0].equals(inst->src[1])) { 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 0fac9495210..89881967dfd 100644 --- a/src/mesa/drivers/dri/i965/brw_vec4.cpp +++ b/src/mesa/drivers/dri/i965/brw_vec4.cpp @@ -693,6 +693,18 @@ vec4_visitor::opt_algebraic() progress = true; } break; + case BRW_OPCODE_CMP: + if (inst->conditional_mod == BRW_CONDITIONAL_GE && + inst->src[0].abs && + inst->src[0].negate && + inst->src[1].is_zero()) { + inst->src[0].abs = false; + inst->src[0].negate = false; + inst->conditional_mod = BRW_CONDITIONAL_Z; + progress = true; + break; + } + break; case SHADER_OPCODE_RCP: { vec4_instruction *prev = (vec4_instruction *)inst->prev; if (prev->opcode == SHADER_OPCODE_SQRT) { -- 2.30.2