Mesa (master): radeonsi/nir: enable lowering of fpow

[Timothy Arceri]

Module: Mesa
Branch: master
Commit: 22430224fec31591432d4a3e65c6f457ba1c1653
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=22430224fec31591432d4a3e65c6f457ba1c1653

Author: Timothy Arceri <tarceri at itsqueeze.com>
Date:   Fri Feb 23 17:00:01 2018 +1100

radeonsi/nir: enable lowering of fpow

Lowering fpow in NIR rather than LLVM can be beneficial.

Polaris results:

Totals from affected shaders:
SGPRS: 124928 -> 124896 (-0.03 %)
VGPRS: 68616 -> 68332 (-0.41 %)
Spilled SGPRs: 394 -> 413 (4.82 %)
Spilled VGPRs: 0 -> 0 (0.00 %)
Private memory VGPRs: 0 -> 0 (0.00 %)
Scratch size: 0 -> 0 (0.00 %) dwords per thread
Code Size: 3668912 -> 3658368 (-0.29 %) bytes
LDS: 0 -> 0 (0.00 %) blocks
Max Waves: 18575 -> 18593 (0.10 %)
Wait states: 0 -> 0 (0.00 %)

Fixes: d6b753920677 "ac/nir: remove emission of nir_op_fpow"

Tested-by: Dieter Nützel <Dieter at nuetzel-hh.de>
Reviewed-by: Samuel Pitoiset <samuel.pitoiset at gmail.com>
Reviewed-by: Marek Olšák <marek.olsak at amd.com>

---

 src/gallium/drivers/radeonsi/si_get.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/gallium/drivers/radeonsi/si_get.c b/src/gallium/drivers/radeonsi/si_get.c
index 19426334fb..998ef8d268 100644
--- a/src/gallium/drivers/radeonsi/si_get.c
+++ b/src/gallium/drivers/radeonsi/si_get.c
@@ -496,6 +496,7 @@ static const struct nir_shader_compiler_options nir_options = {
 	.lower_scmp = true,
 	.lower_flrp32 = true,
 	.lower_flrp64 = true,
+	.lower_fpow = true,
 	.lower_fsat = true,
 	.lower_fdiv = true,
 	.lower_sub = true,