freedreno/ir3: fix GETLOD for negative LODs

Note: for output type U32, negative LOD is not sign extended from 16 bits

Signed-off-by: Jonathan Marek <jonathan@marek.ca>
Reviewed-by: Rob Clark <robclark@gmail.com>

diff --git a/src/freedreno/ir3/ir3_compiler_nir.c b/src/freedreno/ir3/ir3_compiler_nir.c
index 7061964be2095d3a1e674f14af196544698f20b0..38dad5c7e49d5b3849500055d5cdaa72773971f2 100644 (file)
--- a/src/freedreno/ir3/ir3_compiler_nir.c
+++ b/src/freedreno/ir3/ir3_compiler_nir.c
@@ -1918,7 +1918,7 @@ emit_tex(struct ir3_context *ctx, nir_tex_instr *tex)
        }
 
        if (opc == OPC_GETLOD)
-               type = TYPE_U32;
+               type = TYPE_S32;
 
        struct ir3_instruction *samp_tex;
 
@@ -1970,7 +1970,7 @@ emit_tex(struct ir3_context *ctx, nir_tex_instr *tex)
 
                compile_assert(ctx, tex->dest_type == nir_type_float);
                for (i = 0; i < 2; i++) {
-                       dst[i] = ir3_MUL_F(b, ir3_COV(b, dst[i], TYPE_U32, TYPE_F32), 0,
+                       dst[i] = ir3_MUL_F(b, ir3_COV(b, dst[i], TYPE_S32, TYPE_F32), 0,
                                                           factor, 0);
                }
        }