[Mesa-dev] [PATCH 6/6] st/mesa: lower DFRACEXP/DLDEXP when they are not supported

[Ilia Mirkin]

Signed-off-by: Ilia Mirkin <imirkin at alum.mit.edu>
---
 src/mesa/state_tracker/st_glsl_to_tgsi.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
index e170217..4d91ca6 100644
--- a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
+++ b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
@@ -5775,6 +5775,9 @@ st_link_shader(struct gl_context *ctx, struct gl_shader_program *prog)
       bool have_dround = pscreen->get_shader_param(
             pscreen, ptarget,
             PIPE_SHADER_CAP_TGSI_DROUND_SUPPORTED);
+      bool have_dfrexp = pscreen->get_shader_param(
+            pscreen, ptarget,
+            PIPE_SHADER_CAP_TGSI_DFRACEXP_DLDEXP_SUPPORTED);
 
       /* If there are forms of indirect addressing that the driver
        * cannot handle, perform the lowering pass.
@@ -5812,6 +5815,7 @@ st_link_shader(struct gl_context *ctx, struct gl_shader_program *prog)
                          EXP_TO_EXP2 |
                          LOG_TO_LOG2 |
                          LDEXP_TO_ARITH |
+                         (have_dfrexp ? 0 : DFREXP_DLDEXP_TO_ARITH) |
                          CARRY_TO_ARITH |
                          BORROW_TO_ARITH |
                          (have_dround ? 0 : DOPS_TO_DFRAC) |
-- 
2.0.5