pan/mdg: Add abs/neg/shift modifiers to IR

Rather than twiddling them into the ALU packed field.

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

src/panfrost/midgard/compiler.h

@@ -101,6 +101,21 @@ typedef struct midgard_instruction {
         nir_alu_type src_types[MIR_SRC_COUNT];
         nir_alu_type dest_type;
 
+        /* Modifiers, depending on type */
+        union {
+                struct {
+                        bool src_abs[MIR_SRC_COUNT];
+                        bool src_neg[MIR_SRC_COUNT];
+                };
+
+                struct {
+                        bool src_shift[MIR_SRC_COUNT];
+                };
+        };
+
+        /* Out of the union for csel (could maybe be fixed..) */
+        bool src_invert[MIR_SRC_COUNT];
+
         /* Special fields for an ALU instruction */
         midgard_reg_info registers;
 
@@ -130,9 +145,6 @@ typedef struct midgard_instruction {
 
         uint16_t mask;
 
-        /* For accepting ALU ops - invert the nth source */
-        bool src_invert[MIR_SRC_COUNT];
-
         /* Hint for the register allocator not to spill the destination written
          * from this instruction (because it is a spill/unspill node itself).
          * Bitmask of spilled classes */

src/panfrost/midgard/mir.c

@@ -444,6 +444,14 @@ mir_flip(midgard_instruction *ins)
         ins->src_types[0] = ins->src_types[1];
         ins->src_types[1] = temp;
 
+        temp = ins->src_abs[0];
+        ins->src_abs[0] = ins->src_abs[1];
+        ins->src_abs[1] = temp;
+
+        temp = ins->src_neg[0];
+        ins->src_neg[0] = ins->src_neg[1];
+        ins->src_neg[1] = temp;
+
         unsigned temp_swizzle[16];
         memcpy(temp_swizzle, ins->swizzle[0], sizeof(ins->swizzle[0]));
         memcpy(ins->swizzle[0], ins->swizzle[1], sizeof(ins->swizzle[0]));