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68k cores: fix bcd instructions

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passing flamewing's test now
This commit is contained in:
notaz 2017-09-20 23:37:58 +03:00
parent f6aa2456a4
commit c6e1e9779a
4 changed files with 263 additions and 211 deletions
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2
cpu/cyclone

@ -1 +1 @@
Subproject commit 66dda842eae01f47f5389b931ec9567fb0bbb6a1
Subproject commit b889883d36b2d247488c82d79d1eaab4dd41d236

280
cpu/fame/famec_opcodes.h
View file

@ -16936,18 +16936,20 @@ OPCODE(0x4800)
u32 adr, res;
u32 src, dst;
res = DREGu8((Opcode >> 0) & 7);
res = 0x9a - res - ((flag_X >> M68K_SR_X_SFT) & 1);
dst = DREGu8((Opcode >> 0) & 7);
res = -dst - ((flag_X >> M68K_SR_X_SFT) & 1);
if (res != 0x9a)
if (res != 0)
{
if ((res & 0x0f) == 0xa) res = (res & 0xf0) + 0x10;
res &= 0xFF;
DREGu8((Opcode >> 0) & 7) = res;
flag_V = res;
if (((res|dst) & 0x0f) == 0) res = (res & 0xf0) + 6;
res = (res + 0x9a) & 0xFF;
DREGu8((Opcode >> 0) & 7) = res;
flag_V &= ~res;
flag_NotZ |= res;
flag_X = flag_C = M68K_SR_C;
}
else flag_X = flag_C = 0;
else flag_V = flag_X = flag_C = 0;
flag_N = res;
RET(6)
}
@ -16960,18 +16962,20 @@ OPCODE(0x4810)
adr = AREG((Opcode >> 0) & 7);
PRE_IO
READ_BYTE_F(adr, res)
res = 0x9a - res - ((flag_X >> M68K_SR_X_SFT) & 1);
READ_BYTE_F(adr, dst)
res = -dst - ((flag_X >> M68K_SR_X_SFT) & 1);
if (res != 0x9a)
if (res != 0)
{
if ((res & 0x0f) == 0xa) res = (res & 0xf0) + 0x10;
res &= 0xFF;
WRITE_BYTE_F(adr, res)
flag_V = res;
if (((res|dst) & 0x0f) == 0) res = (res & 0xf0) + 6;
res = (res + 0x9a) & 0xFF;
WRITE_BYTE_F(adr, res)
flag_V &= ~res;
flag_NotZ |= res;
flag_X = flag_C = M68K_SR_C;
}
else flag_X = flag_C = 0;
else flag_V = flag_X = flag_C = 0;
flag_N = res;
POST_IO
RET(12)
@ -16986,18 +16990,20 @@ OPCODE(0x4818)
adr = AREG((Opcode >> 0) & 7);
AREG((Opcode >> 0) & 7) += 1;
PRE_IO
READ_BYTE_F(adr, res)
res = 0x9a - res - ((flag_X >> M68K_SR_X_SFT) & 1);
READ_BYTE_F(adr, dst)
res = -dst - ((flag_X >> M68K_SR_X_SFT) & 1);
if (res != 0x9a)
if (res != 0)
{
if ((res & 0x0f) == 0xa) res = (res & 0xf0) + 0x10;
res &= 0xFF;
WRITE_BYTE_F(adr, res)
flag_V = res;
if (((res|dst) & 0x0f) == 0) res = (res & 0xf0) + 6;
res = (res + 0x9a) & 0xFF;
WRITE_BYTE_F(adr, res)
flag_V &= ~res;
flag_NotZ |= res;
flag_X = flag_C = M68K_SR_C;
}
else flag_X = flag_C = 0;
else flag_V = flag_X = flag_C = 0;
flag_N = res;
POST_IO
RET(12)
@ -17012,18 +17018,20 @@ OPCODE(0x4820)
adr = AREG((Opcode >> 0) & 7) - 1;
AREG((Opcode >> 0) & 7) = adr;
PRE_IO
READ_BYTE_F(adr, res)
res = 0x9a - res - ((flag_X >> M68K_SR_X_SFT) & 1);
READ_BYTE_F(adr, dst)
res = -dst - ((flag_X >> M68K_SR_X_SFT) & 1);
if (res != 0x9a)
if (res != 0)
{
if ((res & 0x0f) == 0xa) res = (res & 0xf0) + 0x10;
res &= 0xFF;
WRITE_BYTE_F(adr, res)
flag_V = res;
if (((res|dst) & 0x0f) == 0) res = (res & 0xf0) + 6;
res = (res + 0x9a) & 0xFF;
WRITE_BYTE_F(adr, res)
flag_V &= ~res;
flag_NotZ |= res;
flag_X = flag_C = M68K_SR_C;
}
else flag_X = flag_C = 0;
else flag_V = flag_X = flag_C = 0;
flag_N = res;
POST_IO
RET(14)
@ -17038,18 +17046,20 @@ OPCODE(0x4828)
FETCH_SWORD(adr);
adr += AREG((Opcode >> 0) & 7);
PRE_IO
READ_BYTE_F(adr, res)
res = 0x9a - res - ((flag_X >> M68K_SR_X_SFT) & 1);
READ_BYTE_F(adr, dst)
res = -dst - ((flag_X >> M68K_SR_X_SFT) & 1);
if (res != 0x9a)
if (res != 0)
{
if ((res & 0x0f) == 0xa) res = (res & 0xf0) + 0x10;
res &= 0xFF;
WRITE_BYTE_F(adr, res)
flag_V = res;
if (((res|dst) & 0x0f) == 0) res = (res & 0xf0) + 6;
res = (res + 0x9a) & 0xFF;
WRITE_BYTE_F(adr, res)
flag_V &= ~res;
flag_NotZ |= res;
flag_X = flag_C = M68K_SR_C;
}
else flag_X = flag_C = 0;
else flag_V = flag_X = flag_C = 0;
flag_N = res;
POST_IO
RET(16)
@ -17064,18 +17074,20 @@ OPCODE(0x4830)
adr = AREG((Opcode >> 0) & 7);
DECODE_EXT_WORD
PRE_IO
READ_BYTE_F(adr, res)
res = 0x9a - res - ((flag_X >> M68K_SR_X_SFT) & 1);
READ_BYTE_F(adr, dst)
res = -dst - ((flag_X >> M68K_SR_X_SFT) & 1);
if (res != 0x9a)
if (res != 0)
{
if ((res & 0x0f) == 0xa) res = (res & 0xf0) + 0x10;
res &= 0xFF;
WRITE_BYTE_F(adr, res)
flag_V = res;
if (((res|dst) & 0x0f) == 0) res = (res & 0xf0) + 6;
res = (res + 0x9a) & 0xFF;
WRITE_BYTE_F(adr, res)
flag_V &= ~res;
flag_NotZ |= res;
flag_X = flag_C = M68K_SR_C;
}
else flag_X = flag_C = 0;
else flag_V = flag_X = flag_C = 0;
flag_N = res;
POST_IO
RET(18)
@ -17089,18 +17101,20 @@ OPCODE(0x4838)
FETCH_SWORD(adr);
PRE_IO
READ_BYTE_F(adr, res)
res = 0x9a - res - ((flag_X >> M68K_SR_X_SFT) & 1);
READ_BYTE_F(adr, dst)
res = -dst - ((flag_X >> M68K_SR_X_SFT) & 1);
if (res != 0x9a)
if (res != 0)
{
if ((res & 0x0f) == 0xa) res = (res & 0xf0) + 0x10;
res &= 0xFF;
WRITE_BYTE_F(adr, res)
flag_V = res;
if (((res|dst) & 0x0f) == 0) res = (res & 0xf0) + 6;
res = (res + 0x9a) & 0xFF;
WRITE_BYTE_F(adr, res)
flag_V &= ~res;
flag_NotZ |= res;
flag_X = flag_C = M68K_SR_C;
}
else flag_X = flag_C = 0;
else flag_V = flag_X = flag_C = 0;
flag_N = res;
POST_IO
RET(16)
@ -17114,18 +17128,20 @@ OPCODE(0x4839)
FETCH_LONG(adr);
PRE_IO
READ_BYTE_F(adr, res)
res = 0x9a - res - ((flag_X >> M68K_SR_X_SFT) & 1);
READ_BYTE_F(adr, dst)
res = -dst - ((flag_X >> M68K_SR_X_SFT) & 1);
if (res != 0x9a)
if (res != 0)
{
if ((res & 0x0f) == 0xa) res = (res & 0xf0) + 0x10;
res &= 0xFF;
WRITE_BYTE_F(adr, res)
flag_V = res;
if (((res|dst) & 0x0f) == 0) res = (res & 0xf0) + 6;
res = (res + 0x9a) & 0xFF;
WRITE_BYTE_F(adr, res)
flag_V &= ~res;
flag_NotZ |= res;
flag_X = flag_C = M68K_SR_C;
}
else flag_X = flag_C = 0;
else flag_V = flag_X = flag_C = 0;
flag_N = res;
POST_IO
RET(20)
@ -17140,18 +17156,20 @@ OPCODE(0x481F)
adr = AREG(7);
AREG(7) += 2;
PRE_IO
READ_BYTE_F(adr, res)
res = 0x9a - res - ((flag_X >> M68K_SR_X_SFT) & 1);
READ_BYTE_F(adr, dst)
res = -dst - ((flag_X >> M68K_SR_X_SFT) & 1);
if (res != 0x9a)
if (res != 0)
{
if ((res & 0x0f) == 0xa) res = (res & 0xf0) + 0x10;
res &= 0xFF;
WRITE_BYTE_F(adr, res)
flag_V = res;
if (((res|dst) & 0x0f) == 0) res = (res & 0xf0) + 6;
res = (res + 0x9a) & 0xFF;
WRITE_BYTE_F(adr, res)
flag_V &= ~res;
flag_NotZ |= res;
flag_X = flag_C = M68K_SR_C;
}
else flag_X = flag_C = 0;
else flag_V = flag_X = flag_C = 0;
flag_N = res;
POST_IO
RET(12)
@ -17166,18 +17184,20 @@ OPCODE(0x4827)
adr = AREG(7) - 2;
AREG(7) = adr;
PRE_IO
READ_BYTE_F(adr, res)
res = 0x9a - res - ((flag_X >> M68K_SR_X_SFT) & 1);
READ_BYTE_F(adr, dst)
res = -dst - ((flag_X >> M68K_SR_X_SFT) & 1);
if (res != 0x9a)
if (res != 0)
{
if ((res & 0x0f) == 0xa) res = (res & 0xf0) + 0x10;
res &= 0xFF;
WRITE_BYTE_F(adr, res)
flag_V = res;
if (((res|dst) & 0x0f) == 0) res = (res & 0xf0) + 6;
res = (res + 0x9a) & 0xFF;
WRITE_BYTE_F(adr, res)
flag_V &= ~res;
flag_NotZ |= res;
flag_X = flag_C = M68K_SR_C;
}
else flag_X = flag_C = 0;
else flag_V = flag_X = flag_C = 0;
flag_N = res;
POST_IO
RET(14)
@ -26933,19 +26953,19 @@ OPCODE(0x8100)
{
u32 adr, res;
u32 src, dst;
u32 corf = 0;
src = DREGu8((Opcode >> 0) & 7);
dst = DREGu8((Opcode >> 9) & 7);
res = (dst & 0xF) - (src & 0xF) - ((flag_X >> M68K_SR_X_SFT) & 1);
if (res > 9) res -= 6;
if (res > 0xF) corf = 6;
res += (dst & 0xF0) - (src & 0xF0);
if (res > 0x99)
{
res += 0xA0;
flag_X = flag_C = M68K_SR_C;
}
else flag_X = flag_C = 0;
flag_NotZ |= res & 0xFF;
flag_V = res;
flag_X = flag_C = (s32)res < (s32)corf ? M68K_SR_C : 0;
if (res > 0xff) res += 0xA0;
res = (res - corf) & 0xFF;
flag_V &= ~res;
flag_NotZ |= res;
flag_N = res;
DREGu8((Opcode >> 9) & 7) = res;
RET(6)
@ -26956,6 +26976,7 @@ OPCODE(0x8108)
{
u32 adr, res;
u32 src, dst;
u32 corf = 0;
adr = AREG((Opcode >> 0) & 7) - 1;
AREG((Opcode >> 0) & 7) = adr;
@ -26965,15 +26986,14 @@ OPCODE(0x8108)
AREG((Opcode >> 9) & 7) = adr;
READ_BYTE_F(adr, dst)
res = (dst & 0xF) - (src & 0xF) - ((flag_X >> M68K_SR_X_SFT) & 1);
if (res > 9) res -= 6;
if (res > 0xF) corf = 6;
res += (dst & 0xF0) - (src & 0xF0);
if (res > 0x99)
{
res += 0xA0;
flag_X = flag_C = M68K_SR_C;
}
else flag_X = flag_C = 0;
flag_NotZ |= res & 0xFF;
flag_V = res;
flag_X = flag_C = (s32)res < (s32)corf ? M68K_SR_C : 0;
if (res > 0xff) res += 0xA0;
res = (res - corf) & 0xFF;
flag_V &= ~res;
flag_NotZ |= res;
flag_N = res;
WRITE_BYTE_F(adr, res)
POST_IO
@ -26985,6 +27005,7 @@ OPCODE(0x810F)
{
u32 adr, res;
u32 src, dst;
u32 corf = 0;
adr = AREG(7) - 2;
AREG(7) = adr;
@ -26994,15 +27015,14 @@ OPCODE(0x810F)
AREG((Opcode >> 9) & 7) = adr;
READ_BYTE_F(adr, dst)
res = (dst & 0xF) - (src & 0xF) - ((flag_X >> M68K_SR_X_SFT) & 1);
if (res > 9) res -= 6;
if (res > 0xF) corf = 6;
res += (dst & 0xF0) - (src & 0xF0);
if (res > 0x99)
{
res += 0xA0;
flag_X = flag_C = M68K_SR_C;
}
else flag_X = flag_C = 0;
flag_NotZ |= res & 0xFF;
flag_V = res;
flag_X = flag_C = (s32)res < (s32)corf ? M68K_SR_C : 0;
if (res > 0xff) res += 0xA0;
res = (res - corf) & 0xFF;
flag_V &= ~res;
flag_NotZ |= res;
flag_N = res;
WRITE_BYTE_F(adr, res)
POST_IO
@ -27014,6 +27034,7 @@ OPCODE(0x8F08)
{
u32 adr, res;
u32 src, dst;
u32 corf = 0;
adr = AREG((Opcode >> 0) & 7) - 1;
AREG((Opcode >> 0) & 7) = adr;
@ -27023,15 +27044,14 @@ OPCODE(0x8F08)
AREG(7) = adr;
READ_BYTE_F(adr, dst)
res = (dst & 0xF) - (src & 0xF) - ((flag_X >> M68K_SR_X_SFT) & 1);
if (res > 9) res -= 6;
if (res > 0xF) corf = 6;
res += (dst & 0xF0) - (src & 0xF0);
if (res > 0x99)
{
res += 0xA0;
flag_X = flag_C = M68K_SR_C;
}
else flag_X = flag_C = 0;
flag_NotZ |= res & 0xFF;
flag_V = res;
flag_X = flag_C = (s32)res < (s32)corf ? M68K_SR_C : 0;
if (res > 0xff) res += 0xA0;
res = (res - corf) & 0xFF;
flag_V &= ~res;
flag_NotZ |= res;
flag_N = res;
WRITE_BYTE_F(adr, res)
POST_IO
@ -27043,6 +27063,7 @@ OPCODE(0x8F0F)
{
u32 adr, res;
u32 src, dst;
u32 corf = 0;
adr = AREG(7) - 2;
AREG(7) = adr;
@ -27052,15 +27073,14 @@ OPCODE(0x8F0F)
AREG(7) = adr;
READ_BYTE_F(adr, dst)
res = (dst & 0xF) - (src & 0xF) - ((flag_X >> M68K_SR_X_SFT) & 1);
if (res > 9) res -= 6;
if (res > 0xF) corf = 6;
res += (dst & 0xF0) - (src & 0xF0);
if (res > 0x99)
{
res += 0xA0;
flag_X = flag_C = M68K_SR_C;
}
else flag_X = flag_C = 0;
flag_NotZ |= res & 0xFF;
flag_V = res;
flag_X = flag_C = (s32)res < (s32)corf ? M68K_SR_C : 0;
if (res > 0xff) res += 0xA0;
res = (res - corf) & 0xFF;
flag_V &= ~res;
flag_NotZ |= res;
flag_N = res;
WRITE_BYTE_F(adr, res)
POST_IO
@ -34120,18 +34140,22 @@ OPCODE(0xC100)
{
u32 adr, res;
u32 src, dst;
u32 corf = 0;
src = DREGu8((Opcode >> 0) & 7);
dst = DREGu8((Opcode >> 9) & 7);
res = (dst & 0xF) + (src & 0xF) + ((flag_X >> M68K_SR_X_SFT) & 1);
if (res > 9) res += 6;
if (res > 9) corf = 6;
res += (dst & 0xF0) + (src & 0xF0);
if (res > 0x99)
flag_V = ~res;
res += corf;
if (res > 0x9F)
{
res -= 0xA0;
flag_X = flag_C = M68K_SR_C;
}
else flag_X = flag_C = 0;
flag_V &= res;
flag_NotZ |= res & 0xFF;
flag_N = res;
DREGu8((Opcode >> 9) & 7) = res;
@ -34143,6 +34167,7 @@ OPCODE(0xC108)
{
u32 adr, res;
u32 src, dst;
u32 corf = 0;
adr = AREG((Opcode >> 0) & 7) - 1;
AREG((Opcode >> 0) & 7) = adr;
@ -34152,14 +34177,17 @@ OPCODE(0xC108)
AREG((Opcode >> 9) & 7) = adr;
READ_BYTE_F(adr, dst)
res = (dst & 0xF) + (src & 0xF) + ((flag_X >> M68K_SR_X_SFT) & 1);
if (res > 9) res += 6;
if (res > 9) corf = 6;
res += (dst & 0xF0) + (src & 0xF0);
if (res > 0x99)
flag_V = ~res;
res += corf;
if (res > 0x9F)
{
res -= 0xA0;
flag_X = flag_C = M68K_SR_C;
}
else flag_X = flag_C = 0;
flag_V &= res;
flag_NotZ |= res & 0xFF;
flag_N = res;
WRITE_BYTE_F(adr, res)
@ -34172,6 +34200,7 @@ OPCODE(0xC10F)
{
u32 adr, res;
u32 src, dst;
u32 corf = 0;
adr = AREG(7) - 2;
AREG(7) = adr;
@ -34181,14 +34210,17 @@ OPCODE(0xC10F)
AREG((Opcode >> 9) & 7) = adr;
READ_BYTE_F(adr, dst)
res = (dst & 0xF) + (src & 0xF) + ((flag_X >> M68K_SR_X_SFT) & 1);
if (res > 9) res += 6;
if (res > 9) corf = 6;
res += (dst & 0xF0) + (src & 0xF0);
if (res > 0x99)
flag_V = ~res;
res += corf;
if (res > 0x9F)
{
res -= 0xA0;
flag_X = flag_C = M68K_SR_C;
}
else flag_X = flag_C = 0;
flag_V &= res;
flag_NotZ |= res & 0xFF;
flag_N = res;
WRITE_BYTE_F(adr, res)
@ -34201,6 +34233,7 @@ OPCODE(0xCF08)
{
u32 adr, res;
u32 src, dst;
u32 corf = 0;
adr = AREG((Opcode >> 0) & 7) - 1;
AREG((Opcode >> 0) & 7) = adr;
@ -34210,14 +34243,17 @@ OPCODE(0xCF08)
AREG(7) = adr;
READ_BYTE_F(adr, dst)
res = (dst & 0xF) + (src & 0xF) + ((flag_X >> M68K_SR_X_SFT) & 1);
if (res > 9) res += 6;
if (res > 9) corf = 6;
res += (dst & 0xF0) + (src & 0xF0);
if (res > 0x99)
flag_V = ~res;
res += corf;
if (res > 0x9F)
{
res -= 0xA0;
flag_X = flag_C = M68K_SR_C;
}
else flag_X = flag_C = 0;
flag_V &= res;
flag_NotZ |= res & 0xFF;
flag_N = res;
WRITE_BYTE_F(adr, res)
@ -34230,6 +34266,7 @@ OPCODE(0xCF0F)
{
u32 adr, res;
u32 src, dst;
u32 corf = 0;
adr = AREG(7) - 2;
AREG(7) = adr;
@ -34239,14 +34276,17 @@ OPCODE(0xCF0F)
AREG(7) = adr;
READ_BYTE_F(adr, dst)
res = (dst & 0xF) + (src & 0xF) + ((flag_X >> M68K_SR_X_SFT) & 1);
if (res > 9) res += 6;
if (res > 9) corf = 6;
res += (dst & 0xF0) + (src & 0xF0);
if (res > 0x99)
flag_V = ~res;
res += corf;
if (res > 0x9F)
{
res -= 0xA0;
flag_X = flag_C = M68K_SR_C;
}
else flag_X = flag_C = 0;
flag_V &= res;
flag_NotZ |= res & 0xFF;
flag_N = res;
WRITE_BYTE_F(adr, res)

190
cpu/musashi/m68k_in.c
View file

@ -918,13 +918,15 @@ M68KMAKE_OP(abcd, 8, rr, .)
uint src = DY;
uint dst = *r_dst;
uint res = LOW_NIBBLE(src) + LOW_NIBBLE(dst) + XFLAG_AS_1();
FLAG_V = ~res; /* Undefined V behavior */
uint corf = 0;
if(res > 9)
res += 6;
corf = 6;
res += HIGH_NIBBLE(src) + HIGH_NIBBLE(dst);
FLAG_X = FLAG_C = (res > 0x99) << 8;
FLAG_V = ~res; /* Undefined V behavior */
res += corf;
FLAG_X = FLAG_C = (res > 0x9f) << 8;
if(FLAG_C)
res -= 0xa0;
@ -944,13 +946,15 @@ M68KMAKE_OP(abcd, 8, mm, ax7)
uint ea = EA_A7_PD_8();
uint dst = m68ki_read_8(ea);
uint res = LOW_NIBBLE(src) + LOW_NIBBLE(dst) + XFLAG_AS_1();
FLAG_V = ~res; /* Undefined V behavior */
uint corf = 0;
if(res > 9)
res += 6;
corf = 6;
res += HIGH_NIBBLE(src) + HIGH_NIBBLE(dst);
FLAG_X = FLAG_C = (res > 0x99) << 8;
FLAG_V = ~res; /* Undefined V behavior */
res += corf;
FLAG_X = FLAG_C = (res > 0x9f) << 8;
if(FLAG_C)
res -= 0xa0;
@ -970,13 +974,15 @@ M68KMAKE_OP(abcd, 8, mm, ay7)
uint ea = EA_AX_PD_8();
uint dst = m68ki_read_8(ea);
uint res = LOW_NIBBLE(src) + LOW_NIBBLE(dst) + XFLAG_AS_1();
FLAG_V = ~res; /* Undefined V behavior */
uint corf = 0;
if(res > 9)
res += 6;
corf = 6;
res += HIGH_NIBBLE(src) + HIGH_NIBBLE(dst);
FLAG_X = FLAG_C = (res > 0x99) << 8;
FLAG_V = ~res; /* Undefined V behavior */
res += corf;
FLAG_X = FLAG_C = (res > 0x9f) << 8;
if(FLAG_C)
res -= 0xa0;
@ -996,13 +1002,15 @@ M68KMAKE_OP(abcd, 8, mm, axy7)
uint ea = EA_A7_PD_8();
uint dst = m68ki_read_8(ea);
uint res = LOW_NIBBLE(src) + LOW_NIBBLE(dst) + XFLAG_AS_1();
FLAG_V = ~res; /* Undefined V behavior */
uint corf = 0;
if(res > 9)
res += 6;
corf = 6;
res += HIGH_NIBBLE(src) + HIGH_NIBBLE(dst);
FLAG_X = FLAG_C = (res > 0x99) << 8;
FLAG_V = ~res; /* Undefined V behavior */
res += corf;
FLAG_X = FLAG_C = (res > 0x9f) << 8;
if(FLAG_C)
res -= 0xa0;
@ -1022,13 +1030,15 @@ M68KMAKE_OP(abcd, 8, mm, .)
uint ea = EA_AX_PD_8();
uint dst = m68ki_read_8(ea);
uint res = LOW_NIBBLE(src) + LOW_NIBBLE(dst) + XFLAG_AS_1();
FLAG_V = ~res; /* Undefined V behavior */
uint corf = 0;
if(res > 9)
res += 6;
corf = 6;
res += HIGH_NIBBLE(src) + HIGH_NIBBLE(dst);
FLAG_X = FLAG_C = (res > 0x99) << 8;
FLAG_V = ~res; /* Undefined V behavior */
res += corf;
FLAG_X = FLAG_C = (res > 0x9f) << 8;
if(FLAG_C)
res -= 0xa0;
@ -7794,19 +7804,19 @@ M68KMAKE_OP(mull, 32, ., .)
M68KMAKE_OP(nbcd, 8, ., d)
{
uint* r_dst = &DY;
uint dst = *r_dst;
uint res = MASK_OUT_ABOVE_8(0x9a - dst - XFLAG_AS_1());
uint dst = MASK_OUT_ABOVE_8(*r_dst);
uint res = -dst - XFLAG_AS_1();
if(res != 0x9a)
if(res != 0)
{
FLAG_V = ~res; /* Undefined V behavior */
FLAG_V = res; /* Undefined V behavior */
if((res & 0x0f) == 0xa)
res = (res & 0xf0) + 0x10;
if(((res|dst) & 0x0f) == 0)
res = (res & 0xf0) + 6;
res = MASK_OUT_ABOVE_8(res);
res = MASK_OUT_ABOVE_8(res + 0x9a);
FLAG_V &= res; /* Undefined V behavior part II */
FLAG_V &= ~res; /* Undefined V behavior part II */
*r_dst = MASK_OUT_BELOW_8(*r_dst) | res;
@ -7828,18 +7838,18 @@ M68KMAKE_OP(nbcd, 8, ., .)
{
uint ea = M68KMAKE_GET_EA_AY_8;
uint dst = m68ki_read_8(ea);
uint res = MASK_OUT_ABOVE_8(0x9a - dst - XFLAG_AS_1());
uint res = -dst - XFLAG_AS_1();
if(res != 0x9a)
if(res != 0)
{
FLAG_V = ~res; /* Undefined V behavior */
FLAG_V = res; /* Undefined V behavior */
if((res & 0x0f) == 0xa)
res = (res & 0xf0) + 0x10;
if(((res|dst) & 0x0f) == 0)
res = (res & 0xf0) + 6;
res = MASK_OUT_ABOVE_8(res);
res = MASK_OUT_ABOVE_8(res + 0x9a);
FLAG_V &= res; /* Undefined V behavior part II */
FLAG_V &= ~res; /* Undefined V behavior part II */
m68ki_write_8(ea, MASK_OUT_ABOVE_8(res));
@ -9359,26 +9369,26 @@ M68KMAKE_OP(sbcd, 8, rr, .)
uint src = DY;
uint dst = *r_dst;
uint res = LOW_NIBBLE(dst) - LOW_NIBBLE(src) - XFLAG_AS_1();
uint corf = 0;
// FLAG_V = ~res; /* Undefined V behavior */
FLAG_V = VFLAG_CLEAR; /* Undefined in Motorola's M68000PM/AD rev.1 and safer to assume cleared. */
if(res > 9)
res -= 6;
if(res > 0xf)
corf = 6;
res += HIGH_NIBBLE(dst) - HIGH_NIBBLE(src);
if(res > 0x99)
FLAG_V = res; /* Undefined V behavior */
if(res > 0xff)
{
res += 0xa0;
FLAG_X = FLAG_C = CFLAG_SET;
FLAG_N = NFLAG_SET; /* Undefined in Motorola's M68000PM/AD rev.1 and safer to follow carry. */
}
else if(res < corf)
FLAG_X = FLAG_C = CFLAG_SET;
else
FLAG_N = FLAG_X = FLAG_C = 0;
FLAG_X = FLAG_C = 0;
res = MASK_OUT_ABOVE_8(res);
res = MASK_OUT_ABOVE_8(res - corf);
// FLAG_V &= res; /* Undefined V behavior part II */
// FLAG_N = NFLAG_8(res); /* Undefined N behavior */
FLAG_V &= ~res; /* Undefined V behavior part II */
FLAG_N = NFLAG_8(res); /* Undefined N behavior */
FLAG_Z |= res;
*r_dst = MASK_OUT_BELOW_8(*r_dst) | res;
@ -9391,26 +9401,26 @@ M68KMAKE_OP(sbcd, 8, mm, ax7)
uint ea = EA_A7_PD_8();
uint dst = m68ki_read_8(ea);
uint res = LOW_NIBBLE(dst) - LOW_NIBBLE(src) - XFLAG_AS_1();
uint corf = 0;
// FLAG_V = ~res; /* Undefined V behavior */
FLAG_V = VFLAG_CLEAR; /* Undefined in Motorola's M68000PM/AD rev.1 and safer to return zero. */
if(res > 9)
res -= 6;
if(res > 0xf)
corf = 6;
res += HIGH_NIBBLE(dst) - HIGH_NIBBLE(src);
if(res > 0x99)
FLAG_V = res; /* Undefined V behavior */
if(res > 0xff)
{
res += 0xa0;
FLAG_X = FLAG_C = CFLAG_SET;
FLAG_N = NFLAG_SET; /* Undefined in Motorola's M68000PM/AD rev.1 and safer to follow carry. */
}
else if(res < corf)
FLAG_X = FLAG_C = CFLAG_SET;
else
FLAG_N = FLAG_X = FLAG_C = 0;
FLAG_X = FLAG_C = 0;
res = MASK_OUT_ABOVE_8(res);
res = MASK_OUT_ABOVE_8(res - corf);
// FLAG_V &= res; /* Undefined V behavior part II */
// FLAG_N = NFLAG_8(res); /* Undefined N behavior */
FLAG_V &= ~res; /* Undefined V behavior part II */
FLAG_N = NFLAG_8(res); /* Undefined N behavior */
FLAG_Z |= res;
m68ki_write_8(ea, res);
@ -9423,26 +9433,26 @@ M68KMAKE_OP(sbcd, 8, mm, ay7)
uint ea = EA_AX_PD_8();
uint dst = m68ki_read_8(ea);
uint res = LOW_NIBBLE(dst) - LOW_NIBBLE(src) - XFLAG_AS_1();
uint corf = 0;
// FLAG_V = ~res; /* Undefined V behavior */
FLAG_V = VFLAG_CLEAR; /* Undefined in Motorola's M68000PM/AD rev.1 and safer to return zero. */
if(res > 9)
res -= 6;
if(res > 0xf)
corf = 6;
res += HIGH_NIBBLE(dst) - HIGH_NIBBLE(src);
if(res > 0x99)
FLAG_V = res; /* Undefined V behavior */
if(res > 0xff)
{
res += 0xa0;
FLAG_X = FLAG_C = CFLAG_SET;
FLAG_N = NFLAG_SET; /* Undefined in Motorola's M68000PM/AD rev.1 and safer to follow carry. */
}
else if(res < corf)
FLAG_X = FLAG_C = CFLAG_SET;
else
FLAG_N = FLAG_X = FLAG_C = 0;
FLAG_X = FLAG_C = 0;
res = MASK_OUT_ABOVE_8(res);
res = MASK_OUT_ABOVE_8(res - corf);
// FLAG_V &= res; /* Undefined V behavior part II */
// FLAG_N = NFLAG_8(res); /* Undefined N behavior */
FLAG_V &= ~res; /* Undefined V behavior part II */
FLAG_N = NFLAG_8(res); /* Undefined N behavior */
FLAG_Z |= res;
m68ki_write_8(ea, res);
@ -9455,26 +9465,26 @@ M68KMAKE_OP(sbcd, 8, mm, axy7)
uint ea = EA_A7_PD_8();
uint dst = m68ki_read_8(ea);
uint res = LOW_NIBBLE(dst) - LOW_NIBBLE(src) - XFLAG_AS_1();
uint corf = 0;
// FLAG_V = ~res; /* Undefined V behavior */
FLAG_V = VFLAG_CLEAR; /* Undefined in Motorola's M68000PM/AD rev.1 and safer to return zero. */
if(res > 9)
res -= 6;
if(res > 0xf)
corf = 6;
res += HIGH_NIBBLE(dst) - HIGH_NIBBLE(src);
if(res > 0x99)
FLAG_V = res; /* Undefined V behavior */
if(res > 0xff)
{
res += 0xa0;
FLAG_X = FLAG_C = CFLAG_SET;
FLAG_N = NFLAG_SET; /* Undefined in Motorola's M68000PM/AD rev.1 and safer to follow carry. */
}
else if(res < corf)
FLAG_X = FLAG_C = CFLAG_SET;
else
FLAG_N = FLAG_X = FLAG_C = 0;
FLAG_X = FLAG_C = 0;
res = MASK_OUT_ABOVE_8(res);
res = MASK_OUT_ABOVE_8(res - corf);
// FLAG_V &= res; /* Undefined V behavior part II */
// FLAG_N = NFLAG_8(res); /* Undefined N behavior */
FLAG_V &= ~res; /* Undefined V behavior part II */
FLAG_N = NFLAG_8(res); /* Undefined N behavior */
FLAG_Z |= res;
m68ki_write_8(ea, res);
@ -9487,26 +9497,26 @@ M68KMAKE_OP(sbcd, 8, mm, .)
uint ea = EA_AX_PD_8();
uint dst = m68ki_read_8(ea);
uint res = LOW_NIBBLE(dst) - LOW_NIBBLE(src) - XFLAG_AS_1();
uint corf = 0;
// FLAG_V = ~res; /* Undefined V behavior */
FLAG_V = VFLAG_CLEAR; /* Undefined in Motorola's M68000PM/AD rev.1 and safer to return zero. */
if(res > 9)
res -= 6;
if(res > 0xf)
corf = 6;
res += HIGH_NIBBLE(dst) - HIGH_NIBBLE(src);
if(res > 0x99)
FLAG_V = res; /* Undefined V behavior */
if(res > 0xff)
{
res += 0xa0;
FLAG_X = FLAG_C = CFLAG_SET;
FLAG_N = NFLAG_SET; /* Undefined in Motorola's M68000PM/AD rev.1 and safer to follow carry. */
}
else if(res < corf)
FLAG_X = FLAG_C = CFLAG_SET;
else
FLAG_N = FLAG_X = FLAG_C = 0;
FLAG_X = FLAG_C = 0;
res = MASK_OUT_ABOVE_8(res);
res = MASK_OUT_ABOVE_8(res - corf);
// FLAG_V &= res; /* Undefined V behavior part II */
// FLAG_N = NFLAG_8(res); /* Undefined N behavior */
FLAG_V &= ~res; /* Undefined V behavior part II */
FLAG_N = NFLAG_8(res); /* Undefined N behavior */
FLAG_Z |= res;
m68ki_write_8(ea, res);