From: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Date: Thu, 14 May 2020 21:59:52 +0000 (-0400)
Subject: panfrost: Un/pack RGB10_A2_UINT
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=e24e248b84a2fbcc70cc1ee5c598e5a942effbce;p=mesa.git

panfrost: Un/pack RGB10_A2_UINT

It's different. Because forget me.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5265>
---

diff --git a/src/panfrost/util/pan_lower_framebuffer.c b/src/panfrost/util/pan_lower_framebuffer.c
index f8887519cbc..c0239c751b3 100644
--- a/src/panfrost/util/pan_lower_framebuffer.c
+++ b/src/panfrost/util/pan_lower_framebuffer.c
@@ -387,6 +387,35 @@ pan_unpack_unorm_1010102(nir_builder *b, nir_ssa_def *packed)
         return nir_f2f16(b, nir_fmul(b, nir_u2f32(b, nir_vec(b, chans, 4)), scale));
 }
 
+/* On the other hand, the pure int RGB10_A2 is identical to the spec */
+
+static nir_ssa_def *
+pan_pack_uint_1010102(nir_builder *b, nir_ssa_def *v)
+{
+        nir_ssa_def *shift = nir_ishl(b, nir_u2u32(b, v),
+                        nir_imm_ivec4(b, 0, 10, 20, 30));
+
+        nir_ssa_def *p = nir_ior(b,
+                        nir_ior(b, nir_channel(b, shift, 0), nir_channel(b, shift, 1)),
+                        nir_ior(b, nir_channel(b, shift, 2), nir_channel(b, shift, 3)));
+
+        return pan_replicate_4(b, p);
+}
+
+static nir_ssa_def *
+pan_unpack_uint_1010102(nir_builder *b, nir_ssa_def *packed)
+{
+        nir_ssa_def *chan = nir_channel(b, packed, 0);
+
+        nir_ssa_def *shift = nir_ushr(b, pan_replicate_4(b, chan),
+                        nir_imm_ivec4(b, 0, 10, 20, 30));
+
+        nir_ssa_def *mask = nir_iand(b, shift,
+                        nir_imm_ivec4(b, 0x3ff, 0x3ff, 0x3ff, 0x3));
+
+        return nir_u2u16(b, mask);
+}
+
 /* Generic dispatches for un/pack regardless of format */
 
 static bool
@@ -442,6 +471,8 @@ pan_unpack(nir_builder *b,
                 return pan_unpack_unorm_565(b, packed);
         case PIPE_FORMAT_R10G10B10A2_UNORM:
                 return pan_unpack_unorm_1010102(b, packed);
+        case PIPE_FORMAT_R10G10B10A2_UINT:
+                return pan_unpack_uint_1010102(b, packed);
         default:
                 break;
         }
@@ -487,6 +518,8 @@ pan_pack(nir_builder *b,
                 return pan_pack_unorm_565(b, unpacked);
         case PIPE_FORMAT_R10G10B10A2_UNORM:
                 return pan_pack_unorm_1010102(b, unpacked);
+        case PIPE_FORMAT_R10G10B10A2_UINT:
+                return pan_pack_uint_1010102(b, unpacked);
         default:
                 break;
         }