glsl: Fix undefined shifts.

Shifting into the sign bit is undefined, as is shifting by 32.

Reviewed-by: Jordan Justen <[email protected]>
Reviewed-by: Ian Romanick <[email protected]>

1 files changed, 3 insertions, 3 deletions

diff --git a/src/glsl/nir/nir_opcodes.py b/src/glsl/nir/nir_opcodes.py
index 855095f1f35..d7ba0b62375 100644
--- a/src/glsl/nir/nir_opcodes.py
+++ b/src/glsl/nir/nir_opcodes.py
@@ -516,7 +516,7 @@ int bits = src0, offset = src1;
 if (offset < 0 || bits < 0 || offset + bits > 32)
    dst = 0; /* undefined per the spec */
 else
-   dst = ((1 << bits)- 1) << offset;
+   dst = ((1ull << bits) - 1) << offset;
 """)
 
 opcode("ldexp", 0, tfloat, [0, 0], [tfloat, tint], "", """
@@ -578,7 +578,7 @@ if (bits == 0) {
 } else if (bits < 0 || offset < 0 || offset + bits > 32) {
    dst = 0; /* undefined per the spec */
 } else {
-   dst = (base >> offset) & ((1 << bits) - 1);
+   dst = (base >> offset) & ((1ull << bits) - 1);
 }
 """)
 opcode("ibitfield_extract", 0, tint,
@@ -618,7 +618,7 @@ if (bits == 0) {
 } else if (offset < 0 || bits < 0 || bits + offset > 32) {
    dst = 0;
 } else {
-   unsigned mask = ((1 << bits) - 1) << offset;
+   unsigned mask = ((1ull << bits) - 1) << offset;
    dst = (base & ~mask) | ((insert << bits) & mask);
 }
 """)