Mesa (master): intel/debug: Add a debug flag to force software fp64

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Module: Mesa
Branch: master
Commit: fa4824c1db949bfd5a4f21436c81089892c6110c
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=fa4824c1db949bfd5a4f21436c81089892c6110c

Author: Jason Ekstrand <jason.ekstrand at intel.com>
Date:   Sun Mar  3 10:10:46 2019 -0600

intel/debug: Add a debug flag to force software fp64

Reviewed-by: Matt Turner <mattst88 at gmail.com>
Reviewed-by: Jordan Justen <jordan.l.justen at intel.com>
Reviewed-by: Kenneth Graunke <kenneth at whitecape.org>

---

 src/intel/common/gen_debug.c      | 1 +
 src/intel/common/gen_debug.h      | 3 ++-
 src/intel/compiler/brw_compiler.c | 2 +-
 3 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/intel/common/gen_debug.c b/src/intel/common/gen_debug.c
index a978f2f5818..49af1163314 100644
--- a/src/intel/common/gen_debug.c
+++ b/src/intel/common/gen_debug.c
@@ -85,6 +85,7 @@ static const struct debug_control debug_control[] = {
    { "nohiz",       DEBUG_NO_HIZ },
    { "color",       DEBUG_COLOR },
    { "reemit",      DEBUG_REEMIT },
+   { "soft64",      DEBUG_SOFT64 },
    { NULL,    0 }
 };
 
diff --git a/src/intel/common/gen_debug.h b/src/intel/common/gen_debug.h
index 72d7ca20a39..e4dabc67f8d 100644
--- a/src/intel/common/gen_debug.h
+++ b/src/intel/common/gen_debug.h
@@ -83,6 +83,7 @@ extern uint64_t INTEL_DEBUG;
 #define DEBUG_NO_HIZ              (1ull << 39)
 #define DEBUG_COLOR               (1ull << 40)
 #define DEBUG_REEMIT              (1ull << 41)
+#define DEBUG_SOFT64              (1ull << 42)
 
 /* These flags are not compatible with the disk shader cache */
 #define DEBUG_DISK_CACHE_DISABLE_MASK DEBUG_SHADER_TIME
@@ -90,7 +91,7 @@ extern uint64_t INTEL_DEBUG;
 /* These flags may affect program generation */
 #define DEBUG_DISK_CACHE_MASK \
    (DEBUG_NO16 | DEBUG_NO_DUAL_OBJECT_GS | DEBUG_NO8 |  DEBUG_SPILL_FS | \
-   DEBUG_SPILL_VEC4 | DEBUG_NO_COMPACTION | DEBUG_DO32)
+   DEBUG_SPILL_VEC4 | DEBUG_NO_COMPACTION | DEBUG_DO32 | DEBUG_SOFT64)
 
 #ifdef HAVE_ANDROID_PLATFORM
 #define LOG_TAG "INTEL-MESA"
diff --git a/src/intel/compiler/brw_compiler.c b/src/intel/compiler/brw_compiler.c
index 28793b1f0e6..4101f99d992 100644
--- a/src/intel/compiler/brw_compiler.c
+++ b/src/intel/compiler/brw_compiler.c
@@ -159,7 +159,7 @@ brw_compiler_create(void *mem_ctx, const struct gen_device_info *devinfo)
       nir_lower_dround_even |
       nir_lower_dmod;
 
-   if (!devinfo->has_64bit_types) {
+   if (!devinfo->has_64bit_types || (INTEL_DEBUG & DEBUG_SOFT64)) {
       int64_options |= nir_lower_mov64 |
                        nir_lower_icmp64 |
                        nir_lower_iadd64 |