From c982c3d232b62ea702a77e6e125707ee974fcf00 Mon Sep 17 00:00:00 2001
From: Markus Multrus <markus.multrus@iis.fraunhofer.de>
Date: Wed, 8 Oct 2025 11:42:43 +0200
Subject: [PATCH] first version of script to detect FLP assembled instructions
 in the executable

---
 scripts/find_fp_insn.sh | 93 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 93 insertions(+)
 create mode 100755 scripts/find_fp_insn.sh

diff --git a/scripts/find_fp_insn.sh b/scripts/find_fp_insn.sh
new file mode 100755
index 0000000000..fe0090a55e
--- /dev/null
+++ b/scripts/find_fp_insn.sh
@@ -0,0 +1,93 @@
+#!/usr/bin/env bash
+
+#
+#   (C) 2022-2025 IVAS codec Public Collaboration with portions copyright Dolby International AB, Ericsson AB,
+#   Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V., Huawei Technologies Co. LTD.,
+#   Koninklijke Philips N.V., Nippon Telegraph and Telephone Corporation, Nokia Technologies Oy, Orange,
+#   Panasonic Holdings Corporation, Qualcomm Technologies, Inc., VoiceAge Corporation, and other
+#   contributors to this repository. All Rights Reserved.
+#
+#   This software is protected by copyright law and by international treaties.
+#   The IVAS codec Public Collaboration consisting of Dolby International AB, Ericsson AB,
+#   Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V., Huawei Technologies Co. LTD.,
+#   Koninklijke Philips N.V., Nippon Telegraph and Telephone Corporation, Nokia Technologies Oy, Orange,
+#   Panasonic Holdings Corporation, Qualcomm Technologies, Inc., VoiceAge Corporation, and other
+#   contributors to this repository retain full ownership rights in their respective contributions in
+#   the software. This notice grants no license of any kind, including but not limited to patent
+#   license, nor is any license granted by implication, estoppel or otherwise.
+#
+#   Contributors are required to enter into the IVAS codec Public Collaboration agreement before making
+#   contributions.
+#
+#   This software is provided "AS IS", without any express or implied warranties. The software is in the
+#   development stage. It is intended exclusively for experts who have experience with such software and
+#   solely for the purpose of inspection. All implied warranties of non-infringement, merchantability
+#   and fitness for a particular purpose are hereby disclaimed and excluded.
+#
+#   Any dispute, controversy or claim arising under or in relation to providing this software shall be
+#   submitted to and settled by the final, binding jurisdiction of the courts of Munich, Germany in
+#   accordance with the laws of the Federal Republic of Germany excluding its conflict of law rules and
+#   the United Nations Convention on Contracts on the International Sales of Goods.
+#
+
+# fp_insn_finder.sh
+# Usage: ./find_fp_insn.sh <executable>
+# disassembles executable, lists common floating-point instructions
+
+set -euo pipefail
+
+if [ $# -ne 1 ]; then
+  echo "Usage: $0 <executable>"
+  echo "Find floating-point instructions in an executable based on assembler instructions"
+  echo "Pre-requisites: Perl or gawk"
+  exit 1
+fi
+
+EXE="$1"
+if [ ! -x "$EXE" ]; then
+  echo "Error: '$EXE' is no executable"
+  exit 2
+fi
+
+perl_avail=0
+# check, whether we have perl installed
+if command -v perl >/dev/null 2>&1; then
+  perl_avail=1
+fi
+
+gawk_avail=0
+awk_option=""
+# check, whether we have awk (POSIX) or gawk (GNU) on the system
+if command -v gawk >/dev/null 2>&1; then
+    gawk_avail=1
+    awk_option="--posix"
+fi
+
+
+if [ $perl_avail -ne 0 ]; then
+
+    objdump -d -Mintel "$EXE" \
+    | perl -nE '
+    # Regex for floating-point instructions
+    our $fp = qr/\b(?:fadd|fsub|fmul|fdiv|fld|fst|movss|movsd|addss|addsd|subss|subsd|mulss|mulsd|divss|divsd)\b/;
+    if    (/^[0-9a-f]+ <([^>]+)>:/) { $func = $1 }
+    elsif (/$fp/)                   { say "$func: $_" }
+    '
+
+else
+
+    objdump -d -Mintel "$EXE" |
+    awk ${awk_option} '
+    /^[0-9a-f]+ </ {
+        # Extract function names
+        sub(/^[0-9a-f]+ </, "")
+        sub(/>:.*$/, "")
+        func = $0
+        next
+    }
+    /(^|[^[:alnum:]_])(fadd|fsub|fmul|fdiv|fld|fst|movss|movsd|addss|addsd|subss|subsd|mulss|mulsd|divss|divsd)($|[^[:alnum:]_])/ {
+        print func ": " $0
+    }
+    '
+
+fi
-- 
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