sim: added cmds

[calu.git] / 3b_sim / ccpu.cpp

diff --git a/3b_sim/ccpu.cpp b/3b_sim/ccpu.cpp
index 00b84f6e6f6c24cfaa5b82ec53dc64c8a104271e..148fe8170198214c7b3af4d8034cf6de54094196 100644 (file)
--- a/3b_sim/ccpu.cpp
+++ b/3b_sim/ccpu.cpp
@@ -85,6 +85,11 @@ bool CCpu::conditionMet(short cond)
 
 }
 
+CDat CCpu::getNextPC() const
+{
+       return m_pc_next;
+}
+
 CDat CCpu::getCurPC() const
 {
        return m_pc;
@@ -95,6 +100,15 @@ void CCpu::setNextPC(CDat val)
        m_pc_next = val;
 }
 
+CDat CCpu::getFlags() const {
+       CDat psw = 0;
+       psw += (this->m_Z ? 1 : 0);
+       psw += (this->m_O ? 2 : 0);
+       psw += (this->m_C ? 4 : 0);
+       psw += (this->m_S ? 8 : 0);
+       return psw;
+}
+
 void CCpu::updateFlags(CDat val) {
        this->m_Z = (val == 0);
        this->m_S = ((val >> (BIT_LEN-1)) & 0x1);
@@ -102,6 +116,14 @@ void CCpu::updateFlags(CDat val) {
        this->m_O = false;
 }
 
+void CCpu::updateFlags(CDatd val, CDat a, CDat b) {
+       this->m_Z = (val == 0);
+       this->m_S = ((val >> (BIT_LEN-1)) & 0x1);
+       this->m_C = ((val >> (BIT_LEN)) & 0x1);
+       bool v = (((a ^ b) >> (BIT_LEN-1)) & 0x1) ? true : false;
+       this->m_O = (this->m_S != v);
+}
+
 void CCpu::updateFlags(bool z, bool o, bool c, bool s)
 {
        this->m_Z = z;