UserspaceEmulator: Raise an error on FPU stack underflow

Accessing an unset part of the FPU stack should not be a simple warning, but should trigger the FPU exception mechanism.
Author: https://github.com/Hendiadyoin1 Commit: 83f50a1507 Pull-request: https://github.com/SerenityOS/serenity/pull/8946 Reviewed-by: https://github.com/Dexesttp Reviewed-by: https://github.com/awesomekling Reviewed-by: https://github.com/kleinesfilmroellchen ✅
2025-10-02 06:09:51 +00:00 · 2021-07-23 14:22:19 +02:00 · 2021-07-23 14:22:19 +02:00 · 83f50a1507 · 2024-07-18 01:25:38 +09:00
commit 83f50a1507
parent 0d6d780183
3 changed files with 6 additions and 15 deletions
--- a/Userland/DevTools/UserspaceEmulator/SoftCPU.h
+++ b/Userland/DevTools/UserspaceEmulator/SoftCPU.h
@ -267,7 +267,7 @@ public:
    ValueWithShadow<u8> dl() const { return const_gpr8(X86::RegisterDL); }
    ValueWithShadow<u8> dh() const { return const_gpr8(X86::RegisterDH); }

-    long double fpu_get(u8 index) const { return m_fpu.fpu_get(index); }
+    long double fpu_get(u8 index) { return m_fpu.fpu_get(index); }
    long double fpu_pop() { return m_fpu.fpu_pop(); }
    MMX mmx_get(u8 index) const { return m_fpu.mmx_get(index); };