Sprinter/mame
2
0
Fork 0
mirror of https://github.com/holub/mame synced 2025-04-18 22:49:58 +03:00
Code Issues Actions Packages Projects Releases Wiki Activity

cpu/e132xs: Fixed some recompiler cycle counts:

Browse Source 
* Fixed double-counting bug in exception dispatch.
* Fixed unsigned comparison of signed values in MUL cycles calculation.
This commit is contained in:
Vas Crabb 2025-03-26 20:10:55 +11:00
parent 81a0a72bda
commit 3b7e214343
2 changed files with 16 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

36
src/devices/cpu/e132xs/e132xsdrc_ops.hxx
View File

@ -478,8 +478,6 @@ void hyperstone_device::generate_trap_exception_or_int(drcuml_block &block, uml:
const uint32_t clear_flags = T_MASK | M_MASK;
const uint32_t update_sr = FP_MASK | FL_MASK | set_flags | clear_flags;
UML_ADD(block, I7, I7, mem(&m_core->clock_cycles_2));
if ((TYPE != IS_INT) && (machine().debug_flags & DEBUG_FLAG_ENABLED))
{
UML_MOV(block, mem(&m_core->arg0), trapno); // let the debugger know
@ -3391,6 +3389,21 @@ void hyperstone_device::generate_mul(drcuml_block &block, compiler_state &compil
generate_load_operand(block, compiler, SRC_GLOBAL, src_code, uml::I0, uml::I1);
generate_load_operand(block, compiler, DST_GLOBAL, dst_code, uml::I1, uml::I6);
UML_MOV(block, I7, mem(&m_core->clock_cycles_3));
const int add_cycles = compiler.m_labelnum++;
const int set_cycles = compiler.m_labelnum++;
UML_CMP(block, I0, 0xffff8000);
UML_JMPc(block, uml::COND_L, add_cycles);
UML_CMP(block, I0, 0x00008000);
UML_JMPc(block, uml::COND_GE, add_cycles);
UML_CMP(block, I1, 0xffff8000);
UML_JMPc(block, uml::COND_L, add_cycles);
UML_CMP(block, I1, 0x00008000);
UML_JMPc(block, uml::COND_L, set_cycles);
UML_LABEL(block, add_cycles);
UML_ADD(block, I7, I7, mem(&m_core->clock_cycles_2));
UML_LABEL(block, set_cycles);
UML_MULU(block, I2, I3, I0, I1);
UML_AND(block, I4, DRC_SR, ~(Z_MASK | N_MASK));
@ -3404,25 +3417,6 @@ void hyperstone_device::generate_mul(drcuml_block &block, compiler_state &compil
UML_MOV(block, mem(&m_core->global_regs[dst_code]), I2);
else
UML_STORE(block, (void *)m_core->local_regs, I6, I2, SIZE_DWORD, SCALE_x4);
UML_MOV(block, I7, mem(&m_core->clock_cycles_3));
int add_cycles = compiler.m_labelnum++;
int done = compiler.m_labelnum++;
UML_CMP(block, I0, 0xffff8000);
UML_JMPc(block, uml::COND_B, add_cycles);
UML_CMP(block, I0, 0x8000);
UML_JMPc(block, uml::COND_AE, add_cycles);
UML_CMP(block, I1, 0xffff8000);
UML_JMPc(block, uml::COND_B, add_cycles);
UML_CMP(block, I1, 0x8000);
UML_JMPc(block, uml::COND_AE, add_cycles);
UML_JMP(block, done);
UML_LABEL(block, add_cycles);
UML_ADD(block, I7, I7, mem(&m_core->clock_cycles_2));
UML_LABEL(block, done);
// TODO: proper cycle counts
}

2
src/devices/cpu/e132xs/e132xsop.hxx
View File

@ -2190,7 +2190,7 @@ void hyperstone_device::hyperstone_mul()
(DST_GLOBAL ? m_core->global_regs : m_core->local_regs)[dst_code] = result;
if ((int32_t)sreg < -0x8000 || (int32_t) sreg > 0x7fff || (int32_t) dreg < -0x8000 || (int32_t) dreg > 0x7fff)
if ((int32_t(sreg) < -0x8000) || (int32_t(sreg) > 0x7fff) || (int32_t(dreg) < -0x8000) || (int32_t(dreg) > 0x7fff))
m_core->icount -= 5 << m_core->clck_scale;
else
m_core->icount -= 3 << m_core->clck_scale;