1 files changed, 7 insertions, 7 deletions

diff --git a/src/gallium/drivers/swr/swr_clear.cpp b/src/gallium/drivers/swr/swr_clear.cpp
index f59179f0711..53f4e02d452 100644
--- a/src/gallium/drivers/swr/swr_clear.cpp
+++ b/src/gallium/drivers/swr/swr_clear.cpp
@@ -35,7 +35,7 @@ swr_clear(struct pipe_context *pipe,
    struct pipe_framebuffer_state *fb = &ctx->framebuffer;
 
    UINT clearMask = 0;
-   int layers = 0;
+   unsigned layers = 0;
 
    if (!swr_check_render_cond(pipe))
       return;
@@ -47,20 +47,20 @@ swr_clear(struct pipe_context *pipe,
          if (fb->cbufs[i] && (buffers & (PIPE_CLEAR_COLOR0 << i))) {
             clearMask |= (SWR_ATTACHMENT_COLOR0_BIT << i);
             layers = std::max(layers, fb->cbufs[i]->u.tex.last_layer -
-                                      fb->cbufs[i]->u.tex.first_layer + 1);
+                                      fb->cbufs[i]->u.tex.first_layer + 1u);
          }
    }
 
    if (buffers & PIPE_CLEAR_DEPTH && fb->zsbuf) {
       clearMask |= SWR_ATTACHMENT_DEPTH_BIT;
       layers = std::max(layers, fb->zsbuf->u.tex.last_layer -
-                                fb->zsbuf->u.tex.first_layer + 1);
+                                fb->zsbuf->u.tex.first_layer + 1u);
    }
 
    if (buffers & PIPE_CLEAR_STENCIL && fb->zsbuf) {
       clearMask |= SWR_ATTACHMENT_STENCIL_BIT;
       layers = std::max(layers, fb->zsbuf->u.tex.last_layer -
-                                fb->zsbuf->u.tex.first_layer + 1);
+                                fb->zsbuf->u.tex.first_layer + 1u);
    }
 
 #if 0 // XXX HACK, override clear color alpha. On ubuntu, clears are
@@ -68,7 +68,7 @@ swr_clear(struct pipe_context *pipe,
    ((union pipe_color_union *)color)->f[3] = 1.0; /* cast off your const'd-ness */
 #endif
 
-   for (int i = 0; i < layers; ++i) {
+   for (unsigned i = 0; i < layers; ++i) {
       swr_update_draw_context(ctx);
       SwrClearRenderTarget(ctx->swrContext, clearMask, i,
                            color->f, depth, stencil,
@@ -76,11 +76,11 @@ swr_clear(struct pipe_context *pipe,
 
       // Mask out the attachments that are out of layers.
       if (fb->zsbuf &&
-          fb->zsbuf->u.tex.last_layer - fb->zsbuf->u.tex.first_layer <= i)
+          (fb->zsbuf->u.tex.last_layer <= fb->zsbuf->u.tex.first_layer + i))
          clearMask &= ~(SWR_ATTACHMENT_DEPTH_BIT | SWR_ATTACHMENT_STENCIL_BIT);
       for (unsigned c = 0; c < fb->nr_cbufs; ++c) {
          const struct pipe_surface *sf = fb->cbufs[c];
-         if (sf && sf->u.tex.last_layer - sf->u.tex.first_layer <= i)
+         if (sf && (sf->u.tex.last_layer <= sf->u.tex.first_layer + i))
             clearMask &= ~(SWR_ATTACHMENT_COLOR0_BIT << c);
       }
    }