nir: Add fclamp_pos opcode

Corresponds to the .pos modifier on all Mali GPUs (lima and panfrost).

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Acked-by: Jason Ekstrand <jason@jlekstrand.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5102>

diff --git a/src/compiler/nir/nir_opcodes.py b/src/compiler/nir/nir_opcodes.py
index dd70640..03f00d1 100644 (file)
--- a/src/compiler/nir/nir_opcodes.py
+++ b/src/compiler/nir/nir_opcodes.py
@@ -201,6 +201,7 @@ unop("iabs", tint, "(src0 < 0) ? -src0 : src0")
 unop("fabs", tfloat, "fabs(src0)")
 unop("fsat", tfloat, ("fmin(fmax(src0, 0.0), 1.0)"))
 unop("fsat_signed", tfloat, ("fmin(fmax(src0, -1.0), 1.0)"))
+unop("fclamp_pos", tfloat, ("fmax(src0, 0.0)"))
 unop("frcp", tfloat, "bit_size == 64 ? 1.0 / src0 : 1.0f / src0")
 unop("frsq", tfloat, "bit_size == 64 ? 1.0 / sqrt(src0) : 1.0f / sqrtf(src0)")
 unop("fsqrt", tfloat, "bit_size == 64 ? sqrt(src0) : sqrtf(src0)")