990 extern float __attribute__((overloadable)) step(float edge, float v) {  in step()
993 extern float2 __attribute__((overloadable)) step(float2 edge, float2 v) {  in step()
999 extern float3 __attribute__((overloadable)) step(float3 edge, float3 v) {  in step()
1006 extern float4 __attribute__((overloadable)) step(float4 edge, float4 v) {  in step()
1014 extern float2 __attribute__((overloadable)) step(float2 edge, float v) {  in step()
1020 extern float3 __attribute__((overloadable)) step(float3 edge, float v) {  in step()
1027 extern float4 __attribute__((overloadable)) step(float4 edge, float v) {  in step()
1035 extern float2 __attribute__((overloadable)) step(float edge, float2 v) {  in step()
1041 extern float3 __attribute__((overloadable)) step(float edge, float3 v) {  in step()
1048 extern float4 __attribute__((overloadable)) step(float edge, float4 v) {  in step()
2191 extern half __attribute__((overloadable)) step(half edge, half v) {  in step()
2194 extern half2 __attribute__((overloadable)) step(half2 edge, half2 v) {  in step()
2200 extern half3 __attribute__((overloadable)) step(half3 edge, half3 v) {  in step()
2207 extern half4 __attribute__((overloadable)) step(half4 edge, half4 v) {  in step()
2215 extern half2 __attribute__((overloadable)) step(half2 edge, half v) {  in step()
2221 extern half3 __attribute__((overloadable)) step(half3 edge, half v) {  in step()
2228 extern half4 __attribute__((overloadable)) step(half4 edge, half v) {  in step()
2236 extern half2 __attribute__((overloadable)) step(half edge, half2 v) {  in step()
2242 extern half3 __attribute__((overloadable)) step(half edge, half3 v) {  in step()
2249 extern half4 __attribute__((overloadable)) step(half edge, half4 v) {  in step()