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-rw-r--r--src/video_core/host_shaders/astc_decoder.comp13
1 files changed, 8 insertions, 5 deletions
diff --git a/src/video_core/host_shaders/astc_decoder.comp b/src/video_core/host_shaders/astc_decoder.comp
index 4277b0756..f65e1d1b9 100644
--- a/src/video_core/host_shaders/astc_decoder.comp
+++ b/src/video_core/host_shaders/astc_decoder.comp
@@ -349,14 +349,17 @@ uint ExtractBits(uvec4 payload, int offset, int bits) {
if (bits <= 0) {
return 0;
}
- int last_offset = offset + bits - 1;
- int shifted_offset = offset >> 5;
+ if (bits > 32) {
+ return 0;
+ }
+ const int last_offset = offset + bits - 1;
+ const int shifted_offset = offset >> 5;
if ((last_offset >> 5) == shifted_offset) {
return bitfieldExtract(payload[shifted_offset], offset & 31, bits);
}
- int first_bits = 32 - (offset & 31);
- int result_first = int(bitfieldExtract(payload[shifted_offset], offset & 31, first_bits));
- int result_second = int(bitfieldExtract(payload[shifted_offset + 1], 0, bits - first_bits));
+ const int first_bits = 32 - (offset & 31);
+ const int result_first = int(bitfieldExtract(payload[shifted_offset], offset & 31, first_bits));
+ const int result_second = int(bitfieldExtract(payload[shifted_offset + 1], 0, bits - first_bits));
return result_first | (result_second << first_bits);
}