pan/midgard: Fix backwards blend color load

The source and destination were incorrectly flipped in the move, but
some details of our internal regalloc made this function anyway. Now
that we're changing the regalloc, we need to fix this to avoid
regressing blend shaders.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>

diff --git a/src/panfrost/midgard/midgard_compile.c b/src/panfrost/midgard/midgard_compile.c
index f07fd1b..3b17d8d 100644 (file)
--- a/src/panfrost/midgard/midgard_compile.c
+++ b/src/panfrost/midgard/midgard_compile.c
@@ -1322,7 +1322,7 @@ emit_intrinsic(compiler_context *ctx, nir_intrinsic_instr *instr)
                         /* For blend shaders, load the input color, which is
                          * preloaded to r0 */
 
-                        midgard_instruction move = v_mov(reg, blank_alu_src, SSA_FIXED_REGISTER(0));
+                        midgard_instruction move = v_mov(SSA_FIXED_REGISTER(0), blank_alu_src, reg);
                         emit_mir_instruction(ctx, move);
                 }  else if (ctx->stage == MESA_SHADER_VERTEX) {
                         midgard_instruction ins = m_ld_attr_32(reg, offset);