From b13162c5bfe2d5df51bd7fce450719a49228d77a Mon Sep 17 00:00:00 2001
From: Paulo Matos <pmatos@igalia.com>
Date: Wed, 30 Jul 2025 10:44:57 +0200
Subject: [PATCH] asm_tests: Division by zero does not set IE flag

---
 unittests/32Bit_ASM/X87/D8_F0_2.asm   | 18 ++++++++++++++++++
 unittests/ASM/X87/D8_F0_2.asm         | 17 +++++++++++++++++
 unittests/ASM/X87_F64/D8_F0_2_F64.asm | 18 ++++++++++++++++++
 3 files changed, 53 insertions(+)
 create mode 100644 unittests/32Bit_ASM/X87/D8_F0_2.asm
 create mode 100644 unittests/ASM/X87/D8_F0_2.asm
 create mode 100644 unittests/ASM/X87_F64/D8_F0_2_F64.asm

diff --git a/unittests/32Bit_ASM/X87/D8_F0_2.asm b/unittests/32Bit_ASM/X87/D8_F0_2.asm
new file mode 100644
index 000000000..af32cd1ce
--- /dev/null
+++ b/unittests/32Bit_ASM/X87/D8_F0_2.asm
@@ -0,0 +1,18 @@
+%ifdef CONFIG
+{
+  "RegData": {
+    "RAX":  "0"
+  },
+  "Mode": "32BIT"
+}
+%endif
+
+; Tests that a division by zero does not set the IE flag
+finit
+fldz
+fld1
+fdiv st0, st1
+
+fnstsw ax
+and eax, 1
+hlt
diff --git a/unittests/ASM/X87/D8_F0_2.asm b/unittests/ASM/X87/D8_F0_2.asm
new file mode 100644
index 000000000..5c10fbbee
--- /dev/null
+++ b/unittests/ASM/X87/D8_F0_2.asm
@@ -0,0 +1,17 @@
+%ifdef CONFIG
+{
+  "RegData": {
+    "RAX":  "0"
+  }
+}
+%endif
+
+; Tests that a division by zero does not set the IE flag
+finit
+fldz
+fld1
+fdiv st0, st1
+
+fnstsw ax
+and rax, 1
+hlt
diff --git a/unittests/ASM/X87_F64/D8_F0_2_F64.asm b/unittests/ASM/X87_F64/D8_F0_2_F64.asm
new file mode 100644
index 000000000..318ebe82a
--- /dev/null
+++ b/unittests/ASM/X87_F64/D8_F0_2_F64.asm
@@ -0,0 +1,18 @@
+%ifdef CONFIG
+{
+  "RegData": {
+    "RAX":  "0"
+  },
+  "Env": { "FEX_X87REDUCEDPRECISION" : "1" }
+}
+%endif
+
+; Tests that a division by zero does not set the IE flag
+finit
+fldz
+fld1
+fdiv st0, st1
+
+fnstsw ax
+and rax, 1
+hlt