LIV2/WinUAE
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MUL.L <EA>,Dh-Dl: Dh should be updated last, Dh overwrites Dl if both are same register. Disassembly fixed (MULL.L -> MULS.L/MULU.L, DIV.L -> DIVS.L/DIVU.L)

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This commit is contained in:
Toni Wilen 2019-08-09 13:29:18 +03:00
parent e700848598
commit 2559e26974
2 changed files with 10 additions and 4 deletions
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4
disasm.cpp
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@ -1717,6 +1717,10 @@ void m68k_disasm_2 (TCHAR *buf, int bufsize, uaecptr pc, uaecptr *nextpc, int cn
TCHAR *p;
extra = get_word_debug(pc);
pc += 2;
if (extra & 0x0800) // signed/unsigned
instrname[3] = 'S';
else
instrname[3] = 'U';
pc = ShowEA(NULL, pc, opcode, dp->dreg, dp->dmode, dp->size, instrname, &seaddr2, safemode);
p = instrname + _tcslen(instrname);
if (extra & 0x0400)

10
newcpu_common.cpp
View File

@ -1059,19 +1059,20 @@ bool m68k_mull (uae_u32 opcode, uae_u32 src, uae_u16 extra)
SET_CFLG (0);
if (extra & 0x400) {
// 32 * 32 = 64
m68k_dreg (regs, extra & 7) = (uae_u32)(a >> 32);
m68k_dreg(regs, (extra >> 12) & 7) = (uae_u32)a;
m68k_dreg(regs, extra & 7) = (uae_u32)(a >> 32);
SET_ZFLG(a == 0);
SET_NFLG(a < 0);
} else {
// 32 * 32 = 32
uae_s32 b = (uae_s32)a;
m68k_dreg(regs, (extra >> 12) & 7) = (uae_u32)a;
if ((a & UVAL64(0xffffffff80000000)) != 0 && (a & UVAL64(0xffffffff80000000)) != UVAL64(0xffffffff80000000)) {
SET_VFLG(1);
}
SET_ZFLG(b == 0);
SET_NFLG(b < 0);
}
m68k_dreg (regs, (extra >> 12) & 7) = (uae_u32)a;
} else {
/* unsigned */
uae_u64 a = (uae_u64)(uae_u32)m68k_dreg (regs, (extra >> 12) & 7);
@ -1081,19 +1082,20 @@ bool m68k_mull (uae_u32 opcode, uae_u32 src, uae_u16 extra)
SET_CFLG (0);
if (extra & 0x400) {
// 32 * 32 = 64
m68k_dreg (regs, extra & 7) = (uae_u32)(a >> 32);
m68k_dreg(regs, (extra >> 12) & 7) = (uae_u32)a;
m68k_dreg(regs, extra & 7) = (uae_u32)(a >> 32);
SET_ZFLG(a == 0);
SET_NFLG(((uae_s64)a) < 0);
} else {
// 32 * 32 = 32
uae_s32 b = (uae_s32)a;
m68k_dreg(regs, (extra >> 12) & 7) = (uae_u32)a;
if ((a & UVAL64(0xffffffff00000000)) != 0) {
SET_VFLG(1);
}
SET_ZFLG(b == 0);
SET_NFLG(b < 0);
}
m68k_dreg (regs, (extra >> 12) & 7) = (uae_u32)a;
}
#else
if (extra & 0x800) {