From: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Date: Mon, 11 May 2020 19:05:27 +0000 (-0400)
Subject: pan/mdg: Use type size to determine alignment
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=1ff2cabe87601d95bf945339ee1b3ea4b4d8bc72;p=mesa.git

pan/mdg: Use type size to determine alignment

Generally, f16 needs to be aligned to 16-bit, f32 to 32-bit, ...

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5151>
---

diff --git a/src/panfrost/midgard/midgard_ra.c b/src/panfrost/midgard/midgard_ra.c
index 52f6f11f0a0..95fd30ec337 100644
--- a/src/panfrost/midgard/midgard_ra.c
+++ b/src/panfrost/midgard/midgard_ra.c
@@ -519,9 +519,11 @@ allocate_registers(compiler_context *ctx, bool *spilled)
                 int dest = ins->dest;
                 found_class[dest] = MAX2(found_class[dest], bytes);
 
-                /* XXX: Ensure swizzles align the right way with more LCRA constraints? */
-                if (ins->type == TAG_ALU_4 && size != 32)
-                        min_alignment[dest] = 3; /* (1 << 3) = 8 */
+                min_alignment[dest] =
+                        (size == 16) ? 1 : /* (1 << 1) = 2-byte */
+                        (size == 32) ? 2 : /* (1 << 2) = 4-byte */
+                        (size == 64) ? 3 : /* (1 << 3) = 8-byte */
+                        3; /* 8-bit todo */
 
                 if (ins->type == TAG_LOAD_STORE_4 && ins->load_64)
                         min_alignment[dest] = 3;