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Added prefetch timing approximation for 286/386 CPUs, with configurable memory timing.

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This commit is contained in:
SarahW 2016-11-25 21:32:02 +00:00
commit 1b73963997
33 changed files with 1139 additions and 261 deletions
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35
src/x86_ops_ret.h
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@ -44,34 +44,56 @@
static int opRETF_a16(uint32_t fetchdat)
{
int cycles_old = cycles;
CPU_BLOCK_END();
RETF_a16(0);
PREFETCH_RUN(cycles_old-cycles, 1, -1, 2,0,0,0, 0);
PREFETCH_FLUSH();
return 0;
}
static int opRETF_a32(uint32_t fetchdat)
{
int cycles_old = cycles;
CPU_BLOCK_END();
RETF_a32(0);
PREFETCH_RUN(cycles_old-cycles, 1, -1, 0,2,0,0, 1);
PREFETCH_FLUSH();
return 0;
}
static int opRETF_a16_imm(uint32_t fetchdat)
{
int cycles_old = cycles;
uint16_t offset = getwordf();
CPU_BLOCK_END();
RETF_a16(offset);
PREFETCH_RUN(cycles_old-cycles, 3, -1, 2,0,0,0, 0);
PREFETCH_FLUSH();
return 0;
}
static int opRETF_a32_imm(uint32_t fetchdat)
{
int cycles_old = cycles;
uint16_t offset = getwordf();
CPU_BLOCK_END();
RETF_a32(offset);
PREFETCH_RUN(cycles_old-cycles, 3, -1, 0,2,0,0, 1);
PREFETCH_FLUSH();
return 0;
}
static int opIRET_286(uint32_t fetchdat)
{
int cycles_old = cycles;
if ((cr0 & 1) && (eflags & VM_FLAG) && (IOPL != 3))
{
x86gpf(NULL,0);
@ -107,11 +129,16 @@ static int opIRET_286(uint32_t fetchdat)
flags_extract();
nmi_enable = 1;
CPU_BLOCK_END();
PREFETCH_RUN(cycles_old-cycles, 1, -1, 2,0,0,0, 0);
PREFETCH_FLUSH();
return cpu_state.abrt;
}
static int opIRET(uint32_t fetchdat)
{
int cycles_old = cycles;
if ((cr0 & 1) && (eflags & VM_FLAG) && (IOPL != 3))
{
x86gpf(NULL,0);
@ -147,11 +174,16 @@ static int opIRET(uint32_t fetchdat)
flags_extract();
nmi_enable = 1;
CPU_BLOCK_END();
PREFETCH_RUN(cycles_old-cycles, 1, -1, 2,0,0,0, 0);
PREFETCH_FLUSH();
return cpu_state.abrt;
}
static int opIRETD(uint32_t fetchdat)
{
int cycles_old = cycles;
if ((cr0 & 1) && (eflags & VM_FLAG) && (IOPL != 3))
{
x86gpf(NULL,0);
@ -189,6 +221,9 @@ static int opIRETD(uint32_t fetchdat)
flags_extract();
nmi_enable = 1;
CPU_BLOCK_END();
PREFETCH_RUN(cycles_old-cycles, 1, -1, 0,2,0,0, 1);
PREFETCH_FLUSH();
return cpu_state.abrt;
}