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mb86233: refine the patch to only do fp-type flag setting on fp operations [Ryan Holtz]

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This commit is contained in:
Olivier Galibert 2021-07-09 21:19:05 +02:00
parent 03d1877680
commit 04ad41cb66
2 changed files with 33 additions and 27 deletions
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57
src/devices/cpu/mb86233/mb86233.cpp
View File

@ -277,7 +277,12 @@ void mb86233_device::testdz()
m_st &= ~F_SGD;
}
void mb86233_device::stset_set_sz(u32 val)
void mb86233_device::stset_set_sz_int(u32 val)
{
m_alu_stset = val ? (val & 0x80000000 ? F_SGD : 0) : F_ZRD;
}
void mb86233_device::stset_set_sz_fp(u32 val)
{
m_alu_stset = (val & 0x7fffffff) ? (val & 0x80000000 ? F_SGD : 0) : F_ZRD;
}
@ -291,7 +296,7 @@ void mb86233_device::alu_pre(u32 alu)
// andd
m_alu_stmask = F_ZRD|F_SGD|F_CPD|F_OVD|F_DVZD;
m_alu_r1 = m_d & m_a;
stset_set_sz(m_alu_r1);
stset_set_sz_int(m_alu_r1);
break;
}
@ -299,15 +304,15 @@ void mb86233_device::alu_pre(u32 alu)
// orad
m_alu_stmask = F_ZRD|F_SGD|F_CPD|F_OVD|F_DVZD;
m_alu_r1 = m_d | m_a;
stset_set_sz(m_alu_r1);
stset_set_sz_int(m_alu_r1);
break;
}
case 0x03: {
// eord
m_alu_stmask = F_ZRD|F_SGD|F_CPD|F_OVD|F_DVZD;
m_alu_r1 = m_d ^ m_a;
stset_set_sz(m_alu_r1);
m_alu_r1 = m_d ^ m_a;
stset_set_sz_int(m_alu_r1);
break;
}
@ -315,7 +320,7 @@ void mb86233_device::alu_pre(u32 alu)
// notd
m_alu_stmask = F_ZRD|F_SGD|F_CPD|F_OVD|F_DVZD;
m_alu_r1 = ~m_d;
stset_set_sz(m_alu_r1);
stset_set_sz_int(m_alu_r1);
break;
}
@ -323,7 +328,7 @@ void mb86233_device::alu_pre(u32 alu)
// fcpd
m_alu_stmask = F_ZRD|F_SGD|F_CPD|F_OVD|F_DVZD;
u32 r = f2u(u2f(m_d) - u2f(m_a));
stset_set_sz(r);
stset_set_sz_fp(r);
break;
}
@ -331,7 +336,7 @@ void mb86233_device::alu_pre(u32 alu)
// fmad
m_alu_stmask = F_ZRD|F_SGD|F_CPD|F_OVD|F_DVZD;
m_alu_r1 = f2u(u2f(m_d) + u2f(m_a));
stset_set_sz(m_alu_r1);
stset_set_sz_fp(m_alu_r1);
break;
}
@ -339,7 +344,7 @@ void mb86233_device::alu_pre(u32 alu)
// fsbd
m_alu_stmask = F_ZRD|F_SGD|F_CPD|F_OVD|F_DVZD;
m_alu_r1 = f2u(u2f(m_d) - u2f(m_a));
stset_set_sz(m_alu_r1);
stset_set_sz_fp(m_alu_r1);
break;
}
@ -356,7 +361,7 @@ void mb86233_device::alu_pre(u32 alu)
m_alu_stmask = F_ZRD|F_SGD|F_CPD|F_OVD|F_DVZD;
m_alu_r1 = f2u(u2f(m_d) + u2f(m_p));
m_alu_r2 = f2u(u2f(m_a) * u2f(m_b));
stset_set_sz(m_alu_r1);
stset_set_sz_fp(m_alu_r1);
break;
}
@ -365,7 +370,7 @@ void mb86233_device::alu_pre(u32 alu)
m_alu_stmask = F_ZRD|F_SGD|F_CPD|F_OVD|F_DVZD;
m_alu_r1 = f2u(u2f(m_d) - u2f(m_p));
m_alu_r2 = f2u(u2f(m_a) * u2f(m_b));
stset_set_sz(m_alu_r1);
stset_set_sz_fp(m_alu_r1);
break;
}
@ -373,7 +378,7 @@ void mb86233_device::alu_pre(u32 alu)
// fabd
m_alu_stmask = F_ZRD|F_SGD|F_CPD|F_OVD|F_DVZD;
m_alu_r1 = m_d & 0x7fffffff;
stset_set_sz(m_alu_r1);
stset_set_sz_fp(m_alu_r1);
break;
}
@ -381,7 +386,7 @@ void mb86233_device::alu_pre(u32 alu)
// fsmd
m_alu_stmask = F_ZRD|F_SGD|F_CPD|F_OVD|F_DVZD;
m_alu_r1 = f2u(u2f(m_d) + u2f(m_p));
stset_set_sz(m_alu_r1);
stset_set_sz_fp(m_alu_r1);
break;
}
@ -390,7 +395,7 @@ void mb86233_device::alu_pre(u32 alu)
m_alu_stmask = F_ZRD|F_SGD|F_CPD|F_OVD|F_DVZD;
m_alu_r1 = m_p;
m_alu_r2 = f2u(u2f(m_a) * u2f(m_b));
stset_set_sz(m_alu_r1);
stset_set_sz_fp(m_alu_r1);
break;
}
@ -398,7 +403,7 @@ void mb86233_device::alu_pre(u32 alu)
// cxfd
m_alu_stmask = F_ZRD|F_SGD|F_CPD|F_OVD|F_DVZD;
m_alu_r1 = f2u(s32(m_d));
stset_set_sz(m_alu_r1);
stset_set_sz_int(m_alu_r1);
break;
}
@ -411,7 +416,7 @@ void mb86233_device::alu_pre(u32 alu)
case 2: m_alu_r1 = s32(floorf(u2f(m_d))); break;
case 3: m_alu_r1 = s32(u2f(m_d)); break;
}
stset_set_sz(m_alu_r1);
stset_set_sz_int(m_alu_r1);
break;
}
@ -419,7 +424,7 @@ void mb86233_device::alu_pre(u32 alu)
// fdvd
m_alu_stmask = F_ZRD|F_SGD|F_CPD|F_OVD|F_DVZD;
m_alu_r1 = f2u(u2f(m_d) / u2f(m_a));
stset_set_sz(m_alu_r1);
stset_set_sz_fp(m_alu_r1);
break;
}
@ -427,7 +432,7 @@ void mb86233_device::alu_pre(u32 alu)
// fned
m_alu_stmask = F_ZRD|F_SGD|F_CPD|F_OVD|F_DVZD;
m_alu_r1 = m_d ? m_d ^ 0x80000000 : 0;
stset_set_sz(m_alu_r1);
stset_set_sz_fp(m_alu_r1);
break;
}
@ -435,7 +440,7 @@ void mb86233_device::alu_pre(u32 alu)
// d = b + a
m_alu_stmask = F_ZRD|F_SGD|F_CPD|F_OVD|F_DVZD;
m_alu_r1 = f2u(u2f(m_b) + u2f(m_a));
stset_set_sz(m_alu_r1);
stset_set_sz_fp(m_alu_r1);
break;
}
@ -443,7 +448,7 @@ void mb86233_device::alu_pre(u32 alu)
// d = b - a
m_alu_stmask = F_ZRD|F_SGD|F_CPD|F_OVD|F_DVZD;
m_alu_r1 = f2u(u2f(m_b) - u2f(m_a));
stset_set_sz(m_alu_r1);
stset_set_sz_fp(m_alu_r1);
break;
}
@ -451,7 +456,7 @@ void mb86233_device::alu_pre(u32 alu)
// lsrd
m_alu_stmask = F_ZRD|F_SGD|F_CPD|F_OVD|F_DVZD;
m_alu_r1 = m_d >> m_sft;
stset_set_sz(m_alu_r1);
stset_set_sz_int(m_alu_r1);
break;
}
@ -459,7 +464,7 @@ void mb86233_device::alu_pre(u32 alu)
// lsld
m_alu_stmask = F_ZRD|F_SGD|F_CPD|F_OVD|F_DVZD;
m_alu_r1 = m_d << m_sft;
stset_set_sz(m_alu_r1);
stset_set_sz_int(m_alu_r1);
break;
}
@ -467,7 +472,7 @@ void mb86233_device::alu_pre(u32 alu)
// asrd
m_alu_stmask = F_ZRD|F_SGD|F_CPD|F_OVD|F_DVZD;
m_alu_r1 = s32(m_d) >> m_sft;
stset_set_sz(m_alu_r1);
stset_set_sz_int(m_alu_r1);
break;
}
@ -475,7 +480,7 @@ void mb86233_device::alu_pre(u32 alu)
// asld
m_alu_stmask = F_ZRD|F_SGD|F_CPD|F_OVD|F_DVZD;
m_alu_r1 = s32(m_d) << m_sft;
stset_set_sz(m_alu_r1);
stset_set_sz_int(m_alu_r1);
break;
}
@ -483,7 +488,7 @@ void mb86233_device::alu_pre(u32 alu)
// addd
m_alu_stmask = F_ZRD|F_SGD|F_CPD|F_OVD|F_DVZD;
m_alu_r1 = m_d + m_a;
stset_set_sz(m_alu_r1);
stset_set_sz_int(m_alu_r1);
break;
}
@ -491,7 +496,7 @@ void mb86233_device::alu_pre(u32 alu)
// subd
m_alu_stmask = F_ZRD|F_SGD|F_CPD|F_OVD|F_DVZD;
m_alu_r1 = m_d - m_a;
stset_set_sz(m_alu_r1);
stset_set_sz_int(m_alu_r1);
break;
}

3
src/devices/cpu/mb86233/mb86233.h
View File

@ -120,7 +120,8 @@ private:
void ea_post_1(u32 r);
void pcs_push();
void pcs_pop();
inline void stset_set_sz(u32 val);
inline void stset_set_sz_int(u32 val);
inline void stset_set_sz_fp(u32 val);
u32 read_reg(u32 r);
void write_reg(u32 r, u32 v);