nir: Pull some of intel's image load/store format conversion to nir_format.h

I needed the same functions for v3d.  Note that the color value in the
Intel lowering has already been cut down to image.chans num_components.

v2: Drop the half float one, since it was a 1-liner after cleanup.

Reviewed-by: Jason Ekstrand <[email protected]>

1 files changed, 2 insertions, 18 deletions

diff --git a/src/intel/compiler/brw_nir_lower_image_load_store.c b/src/intel/compiler/brw_nir_lower_image_load_store.c
index 1a7671b74b1..269dbf8e283 100644
--- a/src/intel/compiler/brw_nir_lower_image_load_store.c
+++ b/src/intel/compiler/brw_nir_lower_image_load_store.c
@@ -555,27 +555,11 @@ convert_color_for_store(nir_builder *b, const struct gen_device_info *devinfo,
       break;
 
    case ISL_UINT:
-      if (image.bits[0] < 32) {
-         nir_const_value max;
-         for (unsigned i = 0; i < image.chans; i++) {
-            assert(image.bits[i] < 32);
-            max.u32[i] = (1u << image.bits[i]) - 1;
-         }
-         color = nir_umin(b, color, nir_build_imm(b, image.chans, 32, max));
-      }
+      color = nir_format_clamp_uint(b, color, image.bits);
       break;
 
    case ISL_SINT:
-      if (image.bits[0] < 32) {
-         nir_const_value min, max;
-         for (unsigned i = 0; i < image.chans; i++) {
-            assert(image.bits[i] < 32);
-            max.i32[i] = (1 << (image.bits[i] - 1)) - 1;
-            min.i32[i] = -(1 << (image.bits[i] - 1));
-         }
-         color = nir_imin(b, color, nir_build_imm(b, image.chans, 32, max));
-         color = nir_imax(b, color, nir_build_imm(b, image.chans, 32, min));
-      }
+      color = nir_format_clamp_sint(b, color, image.bits);
       break;
 
    default: