lima/ppir: Add fabs op

Signed-off-by: Andreas Baierl <ichgeh@imkreisrum.de>
Reviewed-by: Qiang Yu <yuq825@gmail.com>

src/gallium/drivers/lima/ir/pp/lower.c

@@ -400,6 +400,20 @@ static bool ppir_lower_trunc(ppir_block *block, ppir_node *node)
    return true;
 }
 
+static bool ppir_lower_abs(ppir_block *block, ppir_node *node)
+{
+   /* Turn it into a mov and set the absolute modifier */
+   ppir_alu_node *alu = ppir_node_to_alu(node);
+
+   assert(alu->num_src == 1);
+
+   alu->src[0].absolute = true;
+   alu->src[0].negate = false;
+   node->op = ppir_op_mov;
+
+   return true;
+}
+
 static bool ppir_lower_branch(ppir_block *block, ppir_node *node)
 {
    ppir_branch_node *branch = ppir_node_to_branch(node);
@@ -435,6 +449,7 @@ static bool ppir_lower_branch(ppir_block *block, ppir_node *node)
 }
 
 static bool (*ppir_lower_funcs[ppir_op_num])(ppir_block *, ppir_node *) = {
+   [ppir_op_abs] = ppir_lower_abs,
    [ppir_op_const] = ppir_lower_const,
    [ppir_op_dot2] = ppir_lower_dot,
    [ppir_op_dot3] = ppir_lower_dot,

src/gallium/drivers/lima/ir/pp/nir.c

@@ -119,6 +119,7 @@ static int nir_to_ppir_opcodes[nir_num_opcodes] = {
 
    [nir_op_mov] = ppir_op_mov,
    [nir_op_fmul] = ppir_op_mul,
+   [nir_op_fabs] = ppir_op_abs,
    [nir_op_fadd] = ppir_op_add,
    [nir_op_fdot2] = ppir_op_dot2,
    [nir_op_fdot3] = ppir_op_dot3,

src/gallium/drivers/lima/ir/pp/node.c

@@ -37,6 +37,9 @@ const ppir_op_info ppir_op_infos[] = {
          PPIR_INSTR_SLOT_END
       },
    },
+   [ppir_op_abs] = {
+      .name = "abs",
+   },
    [ppir_op_mul] = {
       .name = "mul",
       .slots = (int []) {

src/gallium/drivers/lima/ir/pp/ppir.h

@@ -32,6 +32,7 @@
 
 typedef enum {
    ppir_op_mov,
+   ppir_op_abs,
    ppir_op_add,
 
    ppir_op_ddx,