diff --git a/src/gallium/auxiliary/tgsi/tgsi_exec.c b/src/gallium/auxiliary/tgsi/tgsi_exec.c
index e0ff9476cb2..83f0b1b0134 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_exec.c
+++ b/src/gallium/auxiliary/tgsi/tgsi_exec.c
@@ -378,6 +378,16 @@ micro_dfrac(union tgsi_double_channel *dst,
    dst->d[3] = src->d[3] - floor(src->d[3]);
 }
 
+static void
+micro_dflr(union tgsi_double_channel *dst,
+           const union tgsi_double_channel *src)
+{
+   dst->d[0] = floor(src->d[0]);
+   dst->d[1] = floor(src->d[1]);
+   dst->d[2] = floor(src->d[2]);
+   dst->d[3] = floor(src->d[3]);
+}
+
 static void
 micro_dldexp(union tgsi_double_channel *dst,
              const union tgsi_double_channel *src0,
@@ -6110,6 +6120,10 @@ exec_instruction(
       exec_double_unary(mach, inst, micro_dfrac);
       break;
 
+   case TGSI_OPCODE_DFLR:
+      exec_double_unary(mach, inst, micro_dflr);
+      break;
+
    case TGSI_OPCODE_DLDEXP:
       exec_dldexp(mach, inst);
       break;