From 62508856401e082486f2ff0dc80f17ac852f4882 Mon Sep 17 00:00:00 2001
From: Eric Engestrom <eric@igalia.com>
Date: Fri, 2 Feb 2024 11:16:22 +0000
Subject: [PATCH] panfrost: fix UB caused by shifting signed int too far

Fixes: 13d7ca13001064dc7114 ("pan/va: Optimize add with imm to ADD_IMM")
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/27437>
---
 src/panfrost/compiler/valhall/va_optimize.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/panfrost/compiler/valhall/va_optimize.c b/src/panfrost/compiler/valhall/va_optimize.c
index 46202e4d52d..f494bf7f6c4 100644
--- a/src/panfrost/compiler/valhall/va_optimize.c
+++ b/src/panfrost/compiler/valhall/va_optimize.c
@@ -106,9 +106,9 @@ va_fuse_add_imm(bi_instr *I)
    /* If the constant is negated, flip the sign bit */
    if (I->src[s].neg) {
       if (I->op == BI_OPCODE_FADD_IMM_F32)
-         I->index ^= (1 << 31);
+         I->index ^= (1u << 31);
       else if (I->op == BI_OPCODE_FADD_IMM_V2F16)
-         I->index ^= (1 << 31) | (1 << 15);
+         I->index ^= (1u << 31) | (1u << 15);
       else
          unreachable("unexpected .neg");
    }