45 instructions

store_src_rg                   coords = src.rg
init_lane_masks                CondMask = LoopMask = RetMask = true
splat_4_constants              x = 0x3F800000 (1.0)
store_loop_mask                $0 = LoopMask
jump                           jump +12 (label 1 at #17)
label                          label 0x00000002
copy_slot_unmasked             $1 = x(0)
add_imm_float                  $1 += 0xBE800000 (-0.25)
copy_slot_masked               x(0) = Mask($1)
store_condition_mask           $1 = CondMask
copy_slot_unmasked             $2 = x(0)
cmple_imm_float                $2 = lessThanEqual($2, 0)
merge_condition_mask           CondMask = $1 & $2
branch_if_all_lanes_active     branch_if_all_lanes_active +9 (label 0 at #23)
mask_off_loop_mask             LoopMask &= ~(CondMask & LoopMask & RetMask)
load_condition_mask            CondMask = $1
label                          label 0x00000001
copy_slot_unmasked             $1 = x(3)
cmpeq_imm_float                $1 = equal($1, 0x3F800000 (1.0))
merge_loop_mask                LoopMask &= $1
stack_rewind
branch_if_any_lanes_active     branch_if_any_lanes_active -16 (label 2 at #6)
label                          label 0
load_loop_mask                 LoopMask = $0
store_loop_mask                $0 = LoopMask
jump                           jump +15 (label 4 at #41)
label                          label 0x00000005
copy_constant                  $4 = 0
copy_slot_unmasked             $1 = x(2)
add_imm_float                  $1 += 0xBE800000 (-0.25)
copy_slot_masked               x(2) = Mask($1)
store_condition_mask           $1 = CondMask
copy_slot_unmasked             $2 = x(3)
cmpeq_imm_float                $2 = equal($2, 0x3F800000 (1.0))
merge_condition_mask           CondMask = $1 & $2
continue_op                    $4 |= Mask(0xFFFFFFFF); LoopMask &= ~(CondMask & LoopMask & RetMask)
load_condition_mask            CondMask = $1
copy_constant                  $1 = 0
copy_slot_masked               x(1) = Mask($1)
reenable_loop_mask             LoopMask |= $4
label                          label 0x00000004
copy_constant                  $1 = 0
copy_slot_unmasked             $2 = x(2)
cmplt_float                    $1 = lessThan($1, $2)
merge_loop_mask                LoopMask &= $1
stack_rewind
branch_if_any_lanes_active     branch_if_any_lanes_active -20 (label 5 at #27)
label                          label 0x00000003
load_loop_mask                 LoopMask = $0
copy_4_slots_unmasked          $0..3 = x
load_src                       src.rgba = $0..3