Mesa (master): panfrost: Explicitly convert to 32-bit for logic-ops

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Module: Mesa
Branch: master
Commit: 3e4a0c2bca32fcf9f13363fa0c54b6a9b70c086b
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=3e4a0c2bca32fcf9f13363fa0c54b6a9b70c086b

Author: Alyssa Rosenzweig <alyssa.rosenzweig at collabora.com>
Date:   Mon Jun  1 20:34:34 2020 -0400

panfrost: Explicitly convert to 32-bit for logic-ops

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig at collabora.com>
Reported-by: Icecream95 <ixn at keemail.me>
Fixes: 19b4e586f62 ("panfrost: Switch to pan_lower_framebuffer")
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5289>

---

 src/gallium/drivers/panfrost/nir/nir_lower_blend.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/src/gallium/drivers/panfrost/nir/nir_lower_blend.c b/src/gallium/drivers/panfrost/nir/nir_lower_blend.c
index f46f635da48..13cef5d6e14 100644
--- a/src/gallium/drivers/panfrost/nir/nir_lower_blend.c
+++ b/src/gallium/drivers/panfrost/nir/nir_lower_blend.c
@@ -215,6 +215,11 @@ nir_blend_logicop(
    const struct util_format_description *format_desc =
       util_format_description(options.format);
 
+   if (options.half) {
+      src = nir_f2f32(b, src);
+      dst = nir_f2f32(b, dst);
+   }
+
    assert(src->num_components <= 4);
    assert(dst->num_components <= 4);
 
@@ -235,7 +240,12 @@ nir_blend_logicop(
        out = nir_iand(b, out, nir_build_imm(b, 4, 32, mask));
    }
 
-   return nir_format_unorm_to_float(b, out, bits);
+   out = nir_format_unorm_to_float(b, out, bits);
+
+   if (options.half)
+      out = nir_f2f16(b, out);
+
+   return out;
 }
 
 /* Given a blend state, the source color, and the destination color,