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Fix LDUH, LDSH, LDUHA, and LDSHA opcodes in the SPARC core

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This commit is contained in:
therealmogminer@gmail.com 2016-06-26 15:37:01 +02:00
parent 78df22b106
commit db2e134994
2 changed files with 8 additions and 2 deletions
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9
src/devices/cpu/sparc/mb86901.cpp
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@ -163,6 +163,7 @@ void mb86901_device::device_start()
state_add(SPARC_WIM, "WIM", m_wim).formatstr("%08X");
state_add(SPARC_TBR, "TBR", m_tbr).formatstr("%08X");
state_add(SPARC_Y, "Y", m_y).formatstr("%08X");
state_add(SPARC_ANNUL, "ANNUL", m_annul).formatstr("%d");
state_add(SPARC_ICC, "icc", m_icc).formatstr("%4s");
state_add(SPARC_CWP, "CWP", m_cwp).formatstr("%2d");
char regname[3] = "g0";
@ -365,7 +366,7 @@ UINT32 mb86901_device::read_sized_word(UINT8 asi, UINT32 address, int size)
}
else if (size == 2)
{
return m_program->read_word(address) << ((1 - (address & 1)) * 16);
return m_program->read_word(address) << ((2 - (address & 2)) * 8);
}
else
{
@ -392,7 +393,7 @@ void mb86901_device::write_sized_word(UINT8 asi, UINT32 address, UINT32 data, in
}
else if (size == 2)
{
m_program->write_word(address, data >> ((1 - (address & 1)) * 16));
m_program->write_word(address, data >> ((2 - (address & 2)) * 8));
}
else
{
@ -1953,9 +1954,13 @@ void mb86901_device::execute_load(UINT32 op)
else if ((address & 3) == 2) halfword = data & 0xffff;
if (LDSH || LDSHA)
{
word0 = (((INT32)halfword) << 16) >> 16;
}
else
{
word0 = halfword;
}
}
else
{

1
src/devices/cpu/sparc/sparc.h
View File

@ -248,6 +248,7 @@ enum
SPARC_TBR,
SPARC_Y,
SPARC_ANNUL,
SPARC_ICC,
SPARC_CWP,