diff options
| author | Marek Olšák <[email protected]> | 2015-10-20 18:26:02 +0200 |
|---|---|---|
| committer | Marek Olšák <[email protected]> | 2015-10-20 18:27:11 +0200 |
| commit | 814f31457e9ae83d4f1e39236f704721b279b73d (patch) | |
| tree | d0677bba9f0815050c77e9edbaae8844bcac6d1b /src/gallium/drivers/r600/r600_pipe.c | |
| parent | 921feb8782bdc3c459922858bee6d55919467436 (diff) | |
gallium: add PIPE_SHADER_CAP_MAX_UNROLL_ITERATIONS_HINT
This avoids a serious r600g bug leading to a GPU hang.
The chances this bug will get fixed are pretty low now.
I deeply regret listening to others and not pushing this patch, leaving
other users with a GPU-crashing driver. Yes, it should be fixed
in the compiler and it's ugly, but users couldn't care less about that.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=86720
Cc: 11.0 10.6 <[email protected]>
Reviewed-by: Brian Paul <[email protected]>
Diffstat (limited to 'src/gallium/drivers/r600/r600_pipe.c')
| -rw-r--r-- | src/gallium/drivers/r600/r600_pipe.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/gallium/drivers/r600/r600_pipe.c b/src/gallium/drivers/r600/r600_pipe.c index 75de553be2b..9a97de9965e 100644 --- a/src/gallium/drivers/r600/r600_pipe.c +++ b/src/gallium/drivers/r600/r600_pipe.c @@ -511,6 +511,12 @@ static int r600_get_shader_param(struct pipe_screen* pscreen, unsigned shader, e case PIPE_SHADER_CAP_TGSI_DFRACEXP_DLDEXP_SUPPORTED: case PIPE_SHADER_CAP_TGSI_FMA_SUPPORTED: return 0; + case PIPE_SHADER_CAP_MAX_UNROLL_ITERATIONS_HINT: + /* due to a bug in the shader compiler, some loops hang + * if they are not unrolled, see: + * https://bugs.freedesktop.org/show_bug.cgi?id=86720 + */ + return 255; } return 0; } |