Mesa (master): svga: use the SVGA3D_DEVCAP_MAX_FRAGMENT_SHADER_INSTRUCTIONS query

[Brian Paul]

Module: Mesa
Branch: master
Commit: 43f46caf769b0a6d661850ce2fa64b6f4b085b9f
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=43f46caf769b0a6d661850ce2fa64b6f4b085b9f

Author: Brian Paul <brianp at vmware.com>
Date:   Mon Apr 25 17:12:50 2016 -0600

svga: use the SVGA3D_DEVCAP_MAX_FRAGMENT_SHADER_INSTRUCTIONS query

Instead of a hard-coded 512.  The query typically returns 65536 now.
Fall back to 512 if the query fails as we do for vertex shaders (which
should never happen).

Note that we don't actually enforce this limit in our shaders but it gets
reported via the glGetProgramivARB(GL_MAX_PROGRAM_INSTRUCTIONS_ARB) query.

Reviewed-by: Charmaine Lee <charmainel at vmware.com>

---

 src/gallium/drivers/svga/svga_screen.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/gallium/drivers/svga/svga_screen.c b/src/gallium/drivers/svga/svga_screen.c
index 69e625f..d1bf6a3 100644
--- a/src/gallium/drivers/svga/svga_screen.c
+++ b/src/gallium/drivers/svga/svga_screen.c
@@ -431,6 +431,9 @@ vgpu9_get_shader_param(struct pipe_screen *screen, unsigned shader,
       {
       case PIPE_SHADER_CAP_MAX_INSTRUCTIONS:
       case PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS:
+         return get_uint_cap(sws,
+                             SVGA3D_DEVCAP_MAX_FRAGMENT_SHADER_INSTRUCTIONS,
+                             512);
       case PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS:
       case PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS:
          return 512;