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Merged the two versions of x86_flags.h into one.

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OBattler
2020-07-15 03:22:28 +02:00
parent c24a24c1cb
commit 39726915d3
2 changed files with 195 additions and 568 deletions
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526
src/codegen/x86_flags.h
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@@ -1,526 +0,0 @@
/* Copyright holders: Sarah Walker
see COPYING for more details
*/
extern int tempc;
enum
{
FLAGS_UNKNOWN,
FLAGS_ZN8,
FLAGS_ZN16,
FLAGS_ZN32,
FLAGS_ADD8,
FLAGS_ADD16,
FLAGS_ADD32,
FLAGS_SUB8,
FLAGS_SUB16,
FLAGS_SUB32,
FLAGS_SHL8,
FLAGS_SHL16,
FLAGS_SHL32,
FLAGS_SHR8,
FLAGS_SHR16,
FLAGS_SHR32,
FLAGS_SAR8,
FLAGS_SAR16,
FLAGS_SAR32,
FLAGS_INC8,
FLAGS_INC16,
FLAGS_INC32,
FLAGS_DEC8,
FLAGS_DEC16,
FLAGS_DEC32
};
static __inline int ZF_SET()
{
switch (cpu_state.flags_op)
{
case FLAGS_ZN8:
case FLAGS_ZN16:
case FLAGS_ZN32:
case FLAGS_ADD8:
case FLAGS_ADD16:
case FLAGS_ADD32:
case FLAGS_SUB8:
case FLAGS_SUB16:
case FLAGS_SUB32:
case FLAGS_SHL8:
case FLAGS_SHL16:
case FLAGS_SHL32:
case FLAGS_SHR8:
case FLAGS_SHR16:
case FLAGS_SHR32:
case FLAGS_SAR8:
case FLAGS_SAR16:
case FLAGS_SAR32:
case FLAGS_INC8:
case FLAGS_INC16:
case FLAGS_INC32:
case FLAGS_DEC8:
case FLAGS_DEC16:
case FLAGS_DEC32:
return !cpu_state.flags_res;
case FLAGS_UNKNOWN:
return cpu_state.flags & Z_FLAG;
default:
return 0;
}
}
static __inline int NF_SET()
{
switch (cpu_state.flags_op)
{
case FLAGS_ZN8:
case FLAGS_ADD8:
case FLAGS_SUB8:
case FLAGS_SHL8:
case FLAGS_SHR8:
case FLAGS_SAR8:
case FLAGS_INC8:
case FLAGS_DEC8:
return cpu_state.flags_res & 0x80;
case FLAGS_ZN16:
case FLAGS_ADD16:
case FLAGS_SUB16:
case FLAGS_SHL16:
case FLAGS_SHR16:
case FLAGS_SAR16:
case FLAGS_INC16:
case FLAGS_DEC16:
return cpu_state.flags_res & 0x8000;
case FLAGS_ZN32:
case FLAGS_ADD32:
case FLAGS_SUB32:
case FLAGS_SHL32:
case FLAGS_SHR32:
case FLAGS_SAR32:
case FLAGS_INC32:
case FLAGS_DEC32:
return cpu_state.flags_res & 0x80000000;
case FLAGS_UNKNOWN:
return cpu_state.flags & N_FLAG;
default:
return 0;
}
}
static __inline int PF_SET()
{
switch (cpu_state.flags_op)
{
case FLAGS_ZN8:
case FLAGS_ZN16:
case FLAGS_ZN32:
case FLAGS_ADD8:
case FLAGS_ADD16:
case FLAGS_ADD32:
case FLAGS_SUB8:
case FLAGS_SUB16:
case FLAGS_SUB32:
case FLAGS_SHL8:
case FLAGS_SHL16:
case FLAGS_SHL32:
case FLAGS_SHR8:
case FLAGS_SHR16:
case FLAGS_SHR32:
case FLAGS_SAR8:
case FLAGS_SAR16:
case FLAGS_SAR32:
case FLAGS_INC8:
case FLAGS_INC16:
case FLAGS_INC32:
case FLAGS_DEC8:
case FLAGS_DEC16:
case FLAGS_DEC32:
return znptable8[cpu_state.flags_res & 0xff] & P_FLAG;
case FLAGS_UNKNOWN:
return cpu_state.flags & P_FLAG;
default:
return 0;
}
}
static __inline int VF_SET()
{
switch (cpu_state.flags_op)
{
case FLAGS_ZN8:
case FLAGS_ZN16:
case FLAGS_ZN32:
case FLAGS_SAR8:
case FLAGS_SAR16:
case FLAGS_SAR32:
return 0;
case FLAGS_ADD8:
case FLAGS_INC8:
return !((cpu_state.flags_op1 ^ cpu_state.flags_op2) & 0x80) && ((cpu_state.flags_op1 ^ cpu_state.flags_res) & 0x80);
case FLAGS_ADD16:
case FLAGS_INC16:
return !((cpu_state.flags_op1 ^ cpu_state.flags_op2) & 0x8000) && ((cpu_state.flags_op1 ^ cpu_state.flags_res) & 0x8000);
case FLAGS_ADD32:
case FLAGS_INC32:
return !((cpu_state.flags_op1 ^ cpu_state.flags_op2) & 0x80000000) && ((cpu_state.flags_op1 ^ cpu_state.flags_res) & 0x80000000);
case FLAGS_SUB8:
case FLAGS_DEC8:
return ((cpu_state.flags_op1 ^ cpu_state.flags_op2) & (cpu_state.flags_op1 ^ cpu_state.flags_res) & 0x80);
case FLAGS_SUB16:
case FLAGS_DEC16:
return ((cpu_state.flags_op1 ^ cpu_state.flags_op2) & (cpu_state.flags_op1 ^ cpu_state.flags_res) & 0x8000);
case FLAGS_SUB32:
case FLAGS_DEC32:
return ((cpu_state.flags_op1 ^ cpu_state.flags_op2) & (cpu_state.flags_op1 ^ cpu_state.flags_res) & 0x80000000);
case FLAGS_SHL8:
return (((cpu_state.flags_op1 << cpu_state.flags_op2) ^ (cpu_state.flags_op1 << (cpu_state.flags_op2 - 1))) & 0x80);
case FLAGS_SHL16:
return (((cpu_state.flags_op1 << cpu_state.flags_op2) ^ (cpu_state.flags_op1 << (cpu_state.flags_op2 - 1))) & 0x8000);
case FLAGS_SHL32:
return (((cpu_state.flags_op1 << cpu_state.flags_op2) ^ (cpu_state.flags_op1 << (cpu_state.flags_op2 - 1))) & 0x80000000);
case FLAGS_SHR8:
return ((cpu_state.flags_op2 == 1) && (cpu_state.flags_op1 & 0x80));
case FLAGS_SHR16:
return ((cpu_state.flags_op2 == 1) && (cpu_state.flags_op1 & 0x8000));
case FLAGS_SHR32:
return ((cpu_state.flags_op2 == 1) && (cpu_state.flags_op1 & 0x80000000));
case FLAGS_UNKNOWN:
return cpu_state.flags & V_FLAG;
default:
return 0;
}
}
static __inline int AF_SET()
{
switch (cpu_state.flags_op)
{
case FLAGS_ZN8:
case FLAGS_ZN16:
case FLAGS_ZN32:
case FLAGS_SHL8:
case FLAGS_SHL16:
case FLAGS_SHL32:
case FLAGS_SHR8:
case FLAGS_SHR16:
case FLAGS_SHR32:
case FLAGS_SAR8:
case FLAGS_SAR16:
case FLAGS_SAR32:
return 0;
case FLAGS_ADD8:
case FLAGS_ADD16:
case FLAGS_ADD32:
case FLAGS_INC8:
case FLAGS_INC16:
case FLAGS_INC32:
return ((cpu_state.flags_op1 & 0xF) + (cpu_state.flags_op2 & 0xF)) & 0x10;
case FLAGS_SUB8:
case FLAGS_SUB16:
case FLAGS_SUB32:
case FLAGS_DEC8:
case FLAGS_DEC16:
case FLAGS_DEC32:
return ((cpu_state.flags_op1 & 0xF) - (cpu_state.flags_op2 & 0xF)) & 0x10;
case FLAGS_UNKNOWN:
return cpu_state.flags & A_FLAG;
default:
return 0;
}
}
static __inline int CF_SET()
{
switch (cpu_state.flags_op)
{
case FLAGS_ADD8:
return (cpu_state.flags_op1 + cpu_state.flags_op2) & 0x100;
case FLAGS_ADD16:
return (cpu_state.flags_op1 + cpu_state.flags_op2) & 0x10000;
case FLAGS_ADD32:
return (cpu_state.flags_res < cpu_state.flags_op1);
case FLAGS_SUB8:
case FLAGS_SUB16:
case FLAGS_SUB32:
return (cpu_state.flags_op1 < cpu_state.flags_op2);
case FLAGS_SHL8:
return (cpu_state.flags_op1 << (cpu_state.flags_op2 - 1)) & 0x80;
case FLAGS_SHL16:
return (cpu_state.flags_op1 << (cpu_state.flags_op2 - 1)) & 0x8000;
case FLAGS_SHL32:
return (cpu_state.flags_op1 << (cpu_state.flags_op2 - 1)) & 0x80000000;
case FLAGS_SHR8:
case FLAGS_SHR16:
case FLAGS_SHR32:
return (cpu_state.flags_op1 >> (cpu_state.flags_op2 - 1)) & 1;
case FLAGS_SAR8:
return ((int8_t)cpu_state.flags_op1 >> (cpu_state.flags_op2 - 1)) & 1;
case FLAGS_SAR16:
return ((int16_t)cpu_state.flags_op1 >> (cpu_state.flags_op2 - 1)) & 1;
case FLAGS_SAR32:
return ((int32_t)cpu_state.flags_op1 >> (cpu_state.flags_op2 - 1)) & 1;
case FLAGS_ZN8:
case FLAGS_ZN16:
case FLAGS_ZN32:
return 0;
case FLAGS_DEC8:
case FLAGS_DEC16:
case FLAGS_DEC32:
case FLAGS_INC8:
case FLAGS_INC16:
case FLAGS_INC32:
case FLAGS_UNKNOWN:
return cpu_state.flags & C_FLAG;
default:
return 0;
}
}
static __inline void flags_rebuild()
{
if (cpu_state.flags_op != FLAGS_UNKNOWN)
{
uint16_t tempf = 0;
if (CF_SET()) tempf |= C_FLAG;
if (PF_SET()) tempf |= P_FLAG;
if (AF_SET()) tempf |= A_FLAG;
if (ZF_SET()) tempf |= Z_FLAG;
if (NF_SET()) tempf |= N_FLAG;
if (VF_SET()) tempf |= V_FLAG;
cpu_state.flags = (cpu_state.flags & ~0x8d5) | tempf;
cpu_state.flags_op = FLAGS_UNKNOWN;
}
}
static __inline void flags_extract()
{
cpu_state.flags_op = FLAGS_UNKNOWN;
}
static __inline void flags_rebuild_c()
{
if (cpu_state.flags_op != FLAGS_UNKNOWN)
{
if (CF_SET())
cpu_state.flags |= C_FLAG;
else
cpu_state.flags &= ~C_FLAG;
}
}
static __inline void setznp8(uint8_t val)
{
cpu_state.flags_op = FLAGS_ZN8;
cpu_state.flags_res = val;
}
static __inline void setznp16(uint16_t val)
{
cpu_state.flags_op = FLAGS_ZN16;
cpu_state.flags_res = val;
}
static __inline void setznp32(uint32_t val)
{
cpu_state.flags_op = FLAGS_ZN32;
cpu_state.flags_res = val;
}
#define set_flags_shift(op, orig, shift, res) \
cpu_state.flags_op = op; \
cpu_state.flags_res = res; \
cpu_state.flags_op1 = orig; \
cpu_state.flags_op2 = shift;
static __inline void setadd8(uint8_t a, uint8_t b)
{
cpu_state.flags_op1 = a;
cpu_state.flags_op2 = b;
cpu_state.flags_res = (a + b) & 0xff;
cpu_state.flags_op = FLAGS_ADD8;
}
static __inline void setadd16(uint16_t a, uint16_t b)
{
cpu_state.flags_op1 = a;
cpu_state.flags_op2 = b;
cpu_state.flags_res = (a + b) & 0xffff;
cpu_state.flags_op = FLAGS_ADD16;
}
static __inline void setadd32(uint32_t a, uint32_t b)
{
cpu_state.flags_op1 = a;
cpu_state.flags_op2 = b;
cpu_state.flags_res = a + b;
cpu_state.flags_op = FLAGS_ADD32;
}
static __inline void setadd8nc(uint8_t a, uint8_t b)
{
flags_rebuild_c();
cpu_state.flags_op1 = a;
cpu_state.flags_op2 = b;
cpu_state.flags_res = (a + b) & 0xff;
cpu_state.flags_op = FLAGS_INC8;
}
static __inline void setadd16nc(uint16_t a, uint16_t b)
{
flags_rebuild_c();
cpu_state.flags_op1 = a;
cpu_state.flags_op2 = b;
cpu_state.flags_res = (a + b) & 0xffff;
cpu_state.flags_op = FLAGS_INC16;
}
static __inline void setadd32nc(uint32_t a, uint32_t b)
{
flags_rebuild_c();
cpu_state.flags_op1 = a;
cpu_state.flags_op2 = b;
cpu_state.flags_res = a + b;
cpu_state.flags_op = FLAGS_INC32;
}
static __inline void setsub8(uint8_t a, uint8_t b)
{
cpu_state.flags_op1 = a;
cpu_state.flags_op2 = b;
cpu_state.flags_res = (a - b) & 0xff;
cpu_state.flags_op = FLAGS_SUB8;
}
static __inline void setsub16(uint16_t a, uint16_t b)
{
cpu_state.flags_op1 = a;
cpu_state.flags_op2 = b;
cpu_state.flags_res = (a - b) & 0xffff;
cpu_state.flags_op = FLAGS_SUB16;
}
static __inline void setsub32(uint32_t a, uint32_t b)
{
cpu_state.flags_op1 = a;
cpu_state.flags_op2 = b;
cpu_state.flags_res = a - b;
cpu_state.flags_op = FLAGS_SUB32;
}
static __inline void setsub8nc(uint8_t a, uint8_t b)
{
flags_rebuild_c();
cpu_state.flags_op1 = a;
cpu_state.flags_op2 = b;
cpu_state.flags_res = (a - b) & 0xff;
cpu_state.flags_op = FLAGS_DEC8;
}
static __inline void setsub16nc(uint16_t a, uint16_t b)
{
flags_rebuild_c();
cpu_state.flags_op1 = a;
cpu_state.flags_op2 = b;
cpu_state.flags_res = (a - b) & 0xffff;
cpu_state.flags_op = FLAGS_DEC16;
}
static __inline void setsub32nc(uint32_t a, uint32_t b)
{
flags_rebuild_c();
cpu_state.flags_op1 = a;
cpu_state.flags_op2 = b;
cpu_state.flags_res = a - b;
cpu_state.flags_op = FLAGS_DEC32;
}
static __inline void setadc8(uint8_t a, uint8_t b)
{
uint16_t c=(uint16_t)a+(uint16_t)b+tempc;
cpu_state.flags_op = FLAGS_UNKNOWN;
cpu_state.flags&=~0x8D5;
cpu_state.flags|=znptable8[c&0xFF];
if (c&0x100) cpu_state.flags|=C_FLAG;
if (!((a^b)&0x80)&&((a^c)&0x80)) cpu_state.flags|=V_FLAG;
if (((a&0xF)+(b&0xF))&0x10) cpu_state.flags|=A_FLAG;
}
static __inline void setadc16(uint16_t a, uint16_t b)
{
uint32_t c=(uint32_t)a+(uint32_t)b+tempc;
cpu_state.flags_op = FLAGS_UNKNOWN;
cpu_state.flags&=~0x8D5;
cpu_state.flags|=znptable16[c&0xFFFF];
if (c&0x10000) cpu_state.flags|=C_FLAG;
if (!((a^b)&0x8000)&&((a^c)&0x8000)) cpu_state.flags|=V_FLAG;
if (((a&0xF)+(b&0xF))&0x10) cpu_state.flags|=A_FLAG;
}
static __inline void setadc32(uint32_t a, uint32_t b)
{
uint32_t c=(uint32_t)a+(uint32_t)b+tempc;
cpu_state.flags_op = FLAGS_UNKNOWN;
cpu_state.flags&=~0x8D5;
cpu_state.flags|=((c&0x80000000)?N_FLAG:((!c)?Z_FLAG:0));
cpu_state.flags|=(znptable8[c&0xFF]&P_FLAG);
if ((c<a) || (c==a && tempc)) cpu_state.flags|=C_FLAG;
if (!((a^b)&0x80000000)&&((a^c)&0x80000000)) cpu_state.flags|=V_FLAG;
if (((a&0xF)+(b&0xF)+tempc)&0x10) cpu_state.flags|=A_FLAG;
}
static __inline void setsbc8(uint8_t a, uint8_t b)
{
uint16_t c=(uint16_t)a-(((uint16_t)b)+tempc);
cpu_state.flags_op = FLAGS_UNKNOWN;
cpu_state.flags&=~0x8D5;
cpu_state.flags|=znptable8[c&0xFF];
if (c&0x100) cpu_state.flags|=C_FLAG;
if ((a^b)&(a^c)&0x80) cpu_state.flags|=V_FLAG;
if (((a&0xF)-(b&0xF))&0x10) cpu_state.flags|=A_FLAG;
}
static __inline void setsbc16(uint16_t a, uint16_t b)
{
uint32_t c=(uint32_t)a-(((uint32_t)b)+tempc);
cpu_state.flags_op = FLAGS_UNKNOWN;
cpu_state.flags&=~0x8D5;
cpu_state.flags|=(znptable16[c&0xFFFF]&~4);
cpu_state.flags|=(znptable8[c&0xFF]&4);
if (c&0x10000) cpu_state.flags|=C_FLAG;
if ((a^b)&(a^c)&0x8000) cpu_state.flags|=V_FLAG;
if (((a&0xF)-(b&0xF))&0x10) cpu_state.flags|=A_FLAG;
}
static __inline void setsbc32(uint32_t a, uint32_t b)
{
uint32_t c=(uint32_t)a-(((uint32_t)b)+tempc);
cpu_state.flags_op = FLAGS_UNKNOWN;
cpu_state.flags&=~0x8D5;
cpu_state.flags|=((c&0x80000000)?N_FLAG:((!c)?Z_FLAG:0));
cpu_state.flags|=(znptable8[c&0xFF]&P_FLAG);
if ((c>a) || (c==a && tempc)) cpu_state.flags|=C_FLAG;
if ((a^b)&(a^c)&0x80000000) cpu_state.flags|=V_FLAG;
if (((a&0xF)-((b&0xF)+tempc))&0x10) cpu_state.flags|=A_FLAG;
}
extern void cpu_386_flags_extract();
extern void cpu_386_flags_rebuild();