etnaviv: Generate new sin/cos instructions on GC3000

Shaders using sin/cos instructions were not working on GC3000.

The reason for this turns out to be that these chips implement sin/cos
in a different way (but using the same opcodes):

- Need their input scaled by 1/pi instead of 2/pi.

- Output an x and y component, which need to be multiplied to
  get the result.

- tex_amode needs to be set to 1.

Add a new bit to the compiler specs and generate these instructions
as necessary.

CC: <[email protected]>
Signed-off-by: Wladimir J. van der Laan <[email protected]>
Acked-by: Christian Gmeiner <[email protected]>

1 files changed, 2 insertions, 0 deletions

diff --git a/src/gallium/drivers/etnaviv/etnaviv_screen.c b/src/gallium/drivers/etnaviv/etnaviv_screen.c
index 7c1609f5b72..57634201131 100644
--- a/src/gallium/drivers/etnaviv/etnaviv_screen.c
+++ b/src/gallium/drivers/etnaviv/etnaviv_screen.c
@@ -622,6 +622,8 @@ etna_get_specs(struct etna_screen *screen)
       screen->model >= 0x1000 || screen->model == 0x880;
    screen->specs.npot_tex_any_wrap =
       VIV_FEATURE(screen, chipMinorFeatures1, NON_POWER_OF_TWO);
+   screen->specs.has_new_sin_cos =
+      VIV_FEATURE(screen, chipMinorFeatures3, HAS_FAST_TRANSCENDENTALS);
 
    if (instruction_count > 256) { /* unified instruction memory? */
       screen->specs.vs_offset = 0xC000;