Mesa (main): agx: Handle load_back_face_agx

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Module: Mesa
Branch: main
Commit: 0e2293a52b36ab9326e2b8540126b80179362473
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=0e2293a52b36ab9326e2b8540126b80179362473

Author: Alyssa Rosenzweig <alyssa at rosenzweig.io>
Date:   Sat Jun  5 15:05:26 2021 -0400

agx: Handle load_back_face_agx

Signed-off-by: Alyssa Rosenzweig <alyssa at rosenzweig.io>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/11199>

---

 src/asahi/compiler/agx_compile.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/asahi/compiler/agx_compile.c b/src/asahi/compiler/agx_compile.c
index 644b22ca587..e9796577af3 100644
--- a/src/asahi/compiler/agx_compile.c
+++ b/src/asahi/compiler/agx_compile.c
@@ -312,6 +312,9 @@ agx_emit_intrinsic(agx_builder *b, nir_intrinsic_instr *instr)
   case nir_intrinsic_load_kernel_input:
      return agx_emit_load_ubo(b, instr);
 
+  case nir_intrinsic_load_back_face_agx:
+     return agx_get_sr_to(b, dst, AGX_SR_BACKFACING);
+
   case nir_intrinsic_load_vertex_id:
      return agx_mov_to(b, dst, agx_abs(agx_register(10, AGX_SIZE_32))); /* TODO: RA */