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ldexp.3Cg

NAME

ldexp - returns x times 2 rained to n

SYNOPSIS

   float  ldexp(float x, float n);
   float1 ldexp(float1 x, float1 n);
   float2 ldexp(float2 x, float2 n);
   float3 ldexp(float3 x, float3 n);
   float4 ldexp(float4 x, float4 n);
 
 
 

   half   ldexp(half x, half n);
   half1  ldexp(half1 x, half1 n);
   half2  ldexp(half2 x, half2 n);
   half3  ldexp(half3 x, half3 n);
   half4  ldexp(half4 x, half4 n);
 
 
 

   fixed  ldexp(fixed x, fixed n);
   fixed1 ldexp(fixed1 x, fixed1 n);
   fixed2 ldexp(fixed2 x, fixed2 n);
   fixed3 ldexp(fixed3 x, fixed3 n);
   fixed4 ldexp(fixed4 x, fixed4 n);
 
 
 

PARAMETERS

x

Vector or scalar.

n

Vector or scalar for power with which to raise 2.

DESCRIPTION

ldexp returns x times 2 raised to the power n.

REFERENCE IMPLEMENTATION

ldexp for float2 vectors x and n could be implemented as:

   float2 ldexp(float2 x, float2 n)
   {
     return x * exp2(n);
   }
 
 
 

PROFILE SUPPORT

ldexp is supported in all profiles but fp20.

SEE ALSO

exp2, modf, pow