Add tests for fstenv/fldenv/fld [m80]

gen/x86_table.js

@@ -285,7 +285,7 @@ const encodings = [
     { opcode: 0xD9, e: 1, fixed_g: 1, custom: 1, is_fpu: 1, task_switch_test: 1, },
     { opcode: 0xD9, e: 1, fixed_g: 2, custom: 1, is_fpu: 1, task_switch_test: 1, },
     { opcode: 0xD9, e: 1, fixed_g: 3, custom: 1, is_fpu: 1, task_switch_test: 1, },
-    { opcode: 0xD9, e: 1, fixed_g: 4, custom: 1, is_fpu: 1, task_switch_test: 1, only_reg: 1 }, // fldenv
+    { opcode: 0xD9, e: 1, fixed_g: 4, custom: 1, is_fpu: 1, task_switch_test: 1, },
     { opcode: 0xD9, e: 1, fixed_g: 5, custom: 1, is_fpu: 1, task_switch_test: 1, },
     { opcode: 0xD9, e: 1, fixed_g: 6, custom: 1, is_fpu: 1, task_switch_test: 1, skip: 1, }, // fstenv (mem), fprem (reg)
     { opcode: 0xD9, e: 1, fixed_g: 7, custom: 1, is_fpu: 1, task_switch_test: 1, only_mem: 1, }, // fprem
@@ -304,7 +304,7 @@ const encodings = [
     { opcode: 0xDB, e: 1, fixed_g: 2, custom: 2, is_fpu: 1, task_switch_test: 1, },
     { opcode: 0xDB, e: 1, fixed_g: 3, custom: 2, is_fpu: 1, task_switch_test: 1, },
     { opcode: 0xDB, e: 1, fixed_g: 4, custom: 0, is_fpu: 1, task_switch_test: 1, },
-    { opcode: 0xDB, e: 1, fixed_g: 5, custom: 1, is_fpu: 1, task_switch_test: 1, only_reg: 1, }, // XXX: skipped: Seems to page fault or so
+    { opcode: 0xDB, e: 1, fixed_g: 5, custom: 1, is_fpu: 1, task_switch_test: 1, },
     { opcode: 0xDB, e: 1, fixed_g: 6, custom: 0, is_fpu: 1, task_switch_test: 1, },
     { opcode: 0xDB, e: 1, fixed_g: 7, custom: 0, is_fpu: 1, task_switch_test: 1, },
 

tests/nasm/fpu_m80.asm

@@ -0,0 +1,13 @@
+global _start
+
+section .data
+	align 16
+
+%include "header.inc"
+
+    push 1
+    push 0
+    push 0
+    fld tword [esp-8]
+
+%include "footer.inc"

tests/nasm/fstenv.asm

@@ -0,0 +1,16 @@
+global _start
+
+section .data
+	align 16
+
+%include "header.inc"
+
+    fstenv [esp]
+
+    ; zero undefined fields
+    mov word [esp + 0 + 2], 0
+    mov word [esp + 4 + 2], 0
+    mov word [esp + 8 + 2], 0
+    mov word [esp + 24 + 2], 0
+
+%include "footer.inc"