pan/mdg: refactor emit_alu_bundle

This refactor prepares emit_alu_bundle() for the next commit that
reconstructs branch instructions right before emission.
It also simplifies the code since the previous control flow was only
better when we had the prepacked fields in midgard_instruction.

Signed-off-by: Italo Nicola <italonicola@collabora.com>
Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5933>

diff --git a/src/panfrost/midgard/midgard_emit.c b/src/panfrost/midgard/midgard_emit.c
index 826b2741f7a7bbe6703e149779aee3c10b30f000..a5fdc05051bcb7309642bf81f090e867679edd22 100644 (file)
--- a/src/panfrost/midgard/midgard_emit.c
+++ b/src/panfrost/midgard/midgard_emit.c
@@ -617,40 +617,30 @@ emit_alu_bundle(compiler_context *ctx,
         for (unsigned i = 0; i < bundle->instruction_count; ++i) {
                 midgard_instruction *ins = bundle->instructions[i];
 
-                /* Where is this body */
-                unsigned size = 0;
-                void *source = NULL;
-
-                midgard_vector_alu source_alu;
-
-                /* In case we demote to a scalar */
-                midgard_scalar_alu scalarized;
-
                 if (!ins->compact_branch) {
                         mir_lower_inverts(ins);
                         mir_lower_roundmode(ins);
                 }
 
                 if (ins->unit & UNITS_ANY_VECTOR) {
-                        source_alu = vector_alu_from_instr(ins);
-                        mir_pack_mask_alu(ins, &source_alu);
-                        mir_pack_vector_srcs(ins, &source_alu);
-                        size = sizeof(midgard_vector_alu);
-                        source = &source_alu;
+                        midgard_vector_alu source = vector_alu_from_instr(ins);
+                        mir_pack_mask_alu(ins, &source);
+                        mir_pack_vector_srcs(ins, &source);
+                        unsigned size = sizeof(source);
+                        memcpy(util_dynarray_grow_bytes(emission, size, 1), &source, size);
                 } else if (ins->unit == ALU_ENAB_BR_COMPACT) {
-                        size = sizeof(midgard_branch_cond);
-                        source = &ins->br_compact;
+                        uint16_t source = ins->br_compact;
+                        unsigned size = sizeof(source);
+                        memcpy(util_dynarray_grow_bytes(emission, size, 1), &source, size);
                 } else if (ins->compact_branch) { /* misnomer */
-                        size = sizeof(midgard_branch_extended);
-                        source = &ins->branch_extended;
+                        midgard_branch_extended source = ins->branch_extended;
+                        unsigned size = sizeof(source);
+                        memcpy(util_dynarray_grow_bytes(emission, size, 1), &source, size);
                 } else {
-                        size = sizeof(midgard_scalar_alu);
-                        source_alu = vector_alu_from_instr(ins);
-                        scalarized = vector_to_scalar_alu(source_alu, ins);
-                        source = &scalarized;
+                        midgard_scalar_alu source = vector_to_scalar_alu(vector_alu_from_instr(ins), ins);
+                        unsigned size = sizeof(source);
+                        memcpy(util_dynarray_grow_bytes(emission, size, 1), &source, size);
                 }
-
-                memcpy(util_dynarray_grow_bytes(emission, size, 1), source, size);
         }
 
         /* Emit padding (all zero) */