From: Mohammed Gamal <m.gamal...@gmail.com>
Signed-off-by: Mohammed Gamal <m.gamal...@gmail.com>
Signed-off-by: Avi Kivity <a...@redhat.com>
diff --git a/x86/realmode.c b/x86/realmode.c
index 3d8aed4..35f6a16 100644
--- a/x86/realmode.c
+++ b/x86/realmode.c
@@ -1104,6 +1104,96 @@ void test_mul()
print_serial("mul Test 3: PASS\n");
}
+void test_div()
+{
+ struct regs inregs = { 0 }, outregs;
+
+ MK_INSN(div8, "mov $257, %ax\n\t"
+ "mov $2, %cl\n\t"
+ "div %cl\n\t");
+
+ MK_INSN(div16, "mov $512, %ax\n\t"
+ "mov $5, %cx\n\t"
+ "div %cx\n\t");
+
+ MK_INSN(div32, "mov $512, %eax\n\t"
+ "mov $5, %ecx\n\t"
+ "div %ecx\n\t");
+
+ exec_in_big_real_mode(&inregs, &outregs,
+ insn_div8,
+ insn_div8_end - insn_div8);
+
+ if (!regs_equal(&inregs, &outregs, R_AX | R_CX | R_DX) || outregs.eax
!= 384)
+ print_serial("div Test 1: FAIL\n");
+ else
+ print_serial("div Test 1: PASS\n");
+
+ exec_in_big_real_mode(&inregs, &outregs,
+ insn_div16,
+ insn_div16_end - insn_div16);
+
+ if (!regs_equal(&inregs, &outregs, R_AX | R_CX | R_DX) || outregs.eax
!= 102 ||
+ outregs.edx != 2)
+ print_serial("div Test 2: FAIL\n");
+ else
+ print_serial("div Test 2: PASS\n");
+
+ exec_in_big_real_mode(&inregs, &outregs,
+ insn_div32,
+ insn_div32_end - insn_div32);
+
+ if (!regs_equal(&inregs, &outregs, R_AX | R_CX | R_DX) || outregs.eax
!= 102 ||
+ outregs.edx != 2)
+ print_serial("div Test 3: FAIL\n");
+ else
+ print_serial("div Test 3: PASS\n");
+}
+
+void test_idiv()
+{
+ struct regs inregs = { 0 }, outregs;
+
+ MK_INSN(idiv8, "mov $256, %ax\n\t"
+ "mov $-2, %cl\n\t"
+ "idiv %cl\n\t");
+
+ MK_INSN(idiv16, "mov $512, %ax\n\t"
+ "mov $-2, %cx\n\t"
+ "idiv %cx\n\t");
+
+ MK_INSN(idiv32, "mov $512, %eax\n\t"
+ "mov $-2, %ecx\n\t"
+ "idiv %ecx\n\t");
+
+ exec_in_big_real_mode(&inregs, &outregs,
+ insn_idiv8,
+ insn_idiv8_end - insn_idiv8);
+
+ if (!regs_equal(&inregs, &outregs, R_AX | R_CX | R_DX) || outregs.eax
!= (u8)-128)
+ print_serial("idiv Test 1: FAIL\n");
+ else
+ print_serial("idiv Test 1: PASS\n");
+
+ exec_in_big_real_mode(&inregs, &outregs,
+ insn_idiv16,
+ insn_idiv16_end - insn_idiv16);
+
+ if (!regs_equal(&inregs, &outregs, R_AX | R_CX | R_DX) || outregs.eax
!= (u16)-256)
+ print_serial("idiv Test 2: FAIL\n");
+ else
+ print_serial("idiv Test 2: PASS\n");
+
+ exec_in_big_real_mode(&inregs, &outregs,
+ insn_idiv32,
+ insn_idiv32_end - insn_idiv32);
+
+ if (!regs_equal(&inregs, &outregs, R_AX | R_CX | R_DX) || outregs.eax
!= (u32)-256)
+ print_serial("idiv Test 3: FAIL\n");
+ else
+ print_serial("idiv Test 3: PASS\n");
+}
+
void realmode_start(void)
{
test_null();
@@ -1129,6 +1219,8 @@ void realmode_start(void)
test_int();
test_imul();
test_mul();
+ test_div();
+ test_idiv();
exit(0);
}
--
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