From 121f30005ff3000ef7f401ba21e171577c1db4e5 Mon Sep 17 00:00:00 2001
From: SoroushIMG <soroush.kashani@imgtec.com>
Date: Thu, 29 Sep 2022 14:59:06 +0100
Subject: [PATCH] nir: track whether a loop contains soft fp64 ops

Reviewed-by: Mike Blumenkrantz <michael.blumenkrantz@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/18863>
---
 src/compiler/nir/nir.h              | 3 +++
 src/compiler/nir/nir_loop_analyze.c | 4 +++-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/compiler/nir/nir.h b/src/compiler/nir/nir.h
index 0d3222b5d1e..06987a8eeee 100644
--- a/src/compiler/nir/nir.h
+++ b/src/compiler/nir/nir.h
@@ -2871,6 +2871,9 @@ typedef struct {
    /* Estimated cost (in number of instructions) of the loop */
    unsigned instr_cost;
 
+   /* Contains fp64 ops that will be lowered */
+   bool has_soft_fp64;
+
    /* Guessed trip count based on array indexing */
    unsigned guessed_trip_count;
 
diff --git a/src/compiler/nir/nir_loop_analyze.c b/src/compiler/nir/nir_loop_analyze.c
index 8e0b72e6d71..309cf580db9 100644
--- a/src/compiler/nir/nir_loop_analyze.c
+++ b/src/compiler/nir/nir_loop_analyze.c
@@ -216,8 +216,10 @@ instr_cost(loop_info_state *state, nir_instr *instr,
          cost *= 20;
 
       /* If it's full software, it's even more expensive */
-      if (options->lower_doubles_options & nir_lower_fp64_full_software)
+      if (options->lower_doubles_options & nir_lower_fp64_full_software) {
          cost *= 100;
+         state->loop->info->has_soft_fp64 = true;
+      }
 
       return cost;
    } else {