NAME
    trunc - returns largest integer not greater than a scalar or each vector
    component.

SYNOPSIS
      float  trunc(float x);
      float1 trunc(float1 x);
      float2 trunc(float2 x);
      float3 trunc(float3 x);
      float4 trunc(float4 x);
 
      half   trunc(half x);
      half1  trunc(half1 x);
      half2  trunc(half2 x);
      half3  trunc(half3 x);
      half4  trunc(half4 x);
 
      fixed  trunc(fixed x);
      fixed1 trunc(fixed1 x);
      fixed2 trunc(fixed2 x);
      fixed3 trunc(fixed3 x);
      fixed4 trunc(fixed4 x);

PARAMETERS
    x       Vector or scalar which to truncate.

DESCRIPTION
    Returns the integral value nearest to but no larger in magnitude than x.

REFERENCE IMPLEMENTATION
    trunc for a float3 vector could be implemented like this.

      float3 trunc(float3 v)
      {
        float3 rv;
        int i;

        for (i=0; i<3; i++) {
          float x = v[i];

          rv[i] = x < 0 ? -floor(-x) : floor(x);
        }
        return rv;
      }

PROFILE SUPPORT
    trunc is supported in all profiles except fp20.

SEE ALSO
    the ceil manpage, the floor manpage, the round manpage

