Mesa (master): nir: Add r600 specific sin and cos variants

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Module: Mesa
Branch: master
Commit: 318701b80399222457abd013bf797d744675ef58
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=318701b80399222457abd013bf797d744675ef58

Author: Gert Wollny <gert.wollny at collabora.com>
Date:   Wed Mar 10 09:43:48 2021 +0100

nir: Add r600 specific sin and cos variants

r600 expect the input values to be normalited by divinding by 2 *PI, so
add an opcode to be able to lower this in nir.

Signed-off-by: Gert Wollny <gert.wollny at collabora.com>
Reviewed-by: Kristian H. Kristensen <hoegsberg at gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9452>

---

 src/compiler/nir/nir_opcodes.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/compiler/nir/nir_opcodes.py b/src/compiler/nir/nir_opcodes.py
index e9514e1bce2..6966eeda4be 100644
--- a/src/compiler/nir/nir_opcodes.py
+++ b/src/compiler/nir/nir_opcodes.py
@@ -1233,6 +1233,12 @@ unop_horiz("cube_r600", 4, tfloat32, 3, tfloat32, """
    }
 """)
 
+# r600 specific sin and cos
+# these trigeometric functions need some lowering because the supported
+# input values are expected to be normalized by dividing by (2 * pi)
+unop("fsin_r600", tfloat32, "sinf(6.2831853 * src0)")
+unop("fcos_r600", tfloat32, "cosf(6.2831853 * src0)")
+
 # 24b multiply into 32b result (with sign extension)
 binop("imul24", tint32, _2src_commutative + associative,
       "(((int32_t)src0 << 8) >> 8) * (((int32_t)src1 << 8) >> 8)")