diff --git a/libs/vkd3d-shader/glsl.c b/libs/vkd3d-shader/glsl.c
index 5daeccb0..b1cac331 100644
--- a/libs/vkd3d-shader/glsl.c
+++ b/libs/vkd3d-shader/glsl.c
@@ -766,6 +766,9 @@ static void vkd3d_glsl_handle_instruction(struct vkd3d_glsl_generator *gen,
         case VKD3DSIH_RET:
             shader_glsl_ret(gen, ins);
             break;
+        case VKD3DSIH_ROUND_NI:
+            shader_glsl_intrinsic(gen, ins, "floor");
+            break;
         case VKD3DSIH_ROUND_PI:
             shader_glsl_intrinsic(gen, ins, "ceil");
             break;
diff --git a/tests/hlsl/floor.shader_test b/tests/hlsl/floor.shader_test
index 6717fe9e..96a8aca2 100644
--- a/tests/hlsl/floor.shader_test
+++ b/tests/hlsl/floor.shader_test
@@ -18,7 +18,7 @@ float4 main() : sv_target
 
 [test]
 uniform 0 float4 -0.5 6.5 7.5 3.4
-todo(glsl) draw quad
+draw quad
 probe (0, 0) rgba (-1.0, 6.0, 7.0, 3.0) 4
 
 [pixel shader]
@@ -34,7 +34,7 @@ float4 main() : sv_target
 
 [test]
 uniform 0 float4 -0.5 6.5 7.5 3.4
-todo(glsl) draw quad
+draw quad
 probe (0, 0) rgba (6.0, 7.0, -1.0, 3.0) 4
 
 
@@ -52,5 +52,5 @@ float4 main() : sv_target
 [test]
 if(sm<4)  uniform 0 float4 -1 6 7 3
 if(sm>=4) uniform 0 int4 -1 6 7 3
-todo(glsl) draw quad
+draw quad
 probe (0, 0) rgba (6.0, 7.0, -1.0, 3.0) 4