don't generate random tests for fstsw (some flags are not implemented)

gen/x86_table.js

@@ -258,7 +258,7 @@ const encodings = [
     { opcode: 0xDD, e: 1, fixed_g: 4, custom: 0, is_fpu: 1, task_switch_test: 1, os: 1, skip_mem: 1 }, // frstor
     { opcode: 0xDD, e: 1, fixed_g: 5, custom: 1, is_fpu: 1, task_switch_test: 1, os: 1, },
     { opcode: 0xDD, e: 1, fixed_g: 6, custom: 0, is_fpu: 1, task_switch_test: 1, os: 1, skip_mem: 1 }, // fsave
-    { opcode: 0xDD, e: 1, fixed_g: 7, custom: 0, is_fpu: 1, task_switch_test: 1, os: 1, },
+    { opcode: 0xDD, e: 1, fixed_g: 7, custom: 0, is_fpu: 1, task_switch_test: 1, os: 1, skip_mem: 1 }, // fstsw (denormal flag)
 
     { opcode: 0xDE, e: 1, fixed_g: 0, custom: 1, is_fpu: 1, task_switch_test: 1, },
     { opcode: 0xDE, e: 1, fixed_g: 1, custom: 1, is_fpu: 1, task_switch_test: 1, },
@@ -273,7 +273,7 @@ const encodings = [
     { opcode: 0xDF, e: 1, fixed_g: 1, custom: 1, is_fpu: 1, task_switch_test: 1 }, // fisttp (sse3)
     { opcode: 0xDF, e: 1, fixed_g: 2, custom: 1, is_fpu: 1, task_switch_test: 1 },
     { opcode: 0xDF, e: 1, fixed_g: 3, custom: 1, is_fpu: 1, task_switch_test: 1 },
-    { opcode: 0xDF, e: 1, fixed_g: 4, custom: 1, is_fpu: 1, task_switch_test: 1, skip_mem: 1 }, // unimplemented: Binary Coded Decimals
+    { opcode: 0xDF, e: 1, fixed_g: 4, custom: 1, is_fpu: 1, task_switch_test: 1, skip: 1 }, // unimplemented: Binary Coded Decimals / fsts (denormal flag)
     { opcode: 0xDF, e: 1, fixed_g: 5, custom: 1, is_fpu: 1, task_switch_test: 1 },
     { opcode: 0xDF, e: 1, fixed_g: 6, custom: 1, is_fpu: 1, task_switch_test: 1 },
     { opcode: 0xDF, e: 1, fixed_g: 7, custom: 1, is_fpu: 1, task_switch_test: 1 },

tests/nasm/fstsw.asm

@@ -0,0 +1,10 @@
+global _start
+
+%include "header.inc"
+
+    mov eax, 12345678h
+    fstsw ax
+    push 87654321h
+    fstsw [esp]
+
+%include "footer.inc"