Merge pull request #4741 from pmatos/fninit_tests

asm_tests: Tests for fninit

unittests/32Bit_ASM/X87/DB_E3.asm

@@ -7,12 +7,16 @@
 }
 %endif
 
-mov eax, 0
-mov esp, 0xe0000008
+section .bss
+control: resb 2 ; Reserve space for the FPU control word
+
+section .text
+global _start
+_start:
 fninit
 
 ; Ensures that fnstcw after fninit sets the correct value
-fnstcw [esp]
-mov ax, word [esp]
+fnstcw [rel control]
+mov ax, word [rel control]
 
 hlt

unittests/ASM/X87/DB_E3.asm

@@ -0,0 +1,21 @@
+%ifdef CONFIG
+{
+  "RegData": {
+    "RAX": "0x037F"
+  }
+}
+%endif
+
+section .bss
+control: resb 2 ; Reserve space for the FPU control word
+
+section .text
+global _start
+_start:
+fninit
+
+; Ensures that fnstcw after fninit sets the correct value
+fnstcw [rel control]
+mov ax, word [rel control]
+
+hlt

unittests/ASM/X87_F64/DB_E3.asm

@@ -0,0 +1,22 @@
+%ifdef CONFIG
+{
+  "RegData": {
+    "RAX": "0x037F"
+  },
+  "Env": { "FEX_X87REDUCEDPRECISION" : "1" }
+}
+%endif
+
+section .bss
+control: resb 2 ; Reserve space for the FPU control word
+
+section .text
+global _start
+_start:
+fninit
+
+; Ensures that fnstcw after fninit sets the correct value
+fnstcw [rel control]
+mov ax, word [rel control]
+
+hlt