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Restore the debug register operation on 486+

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But put it behind a compile-time option due to performance hits
Also add the DE flag to CPUID on supported CPUs
This commit is contained in:
Alexander Babikov
2024-01-15 06:22:38 +05:00
parent d182f4c553
commit a07ffdecab
12 changed files with 531 additions and 37 deletions
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12
src/cpu/x86_ops_flag.h
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@@ -178,6 +178,9 @@ opPOPF_186(uint32_t fetchdat)
else
cpu_state.flags = (cpu_state.flags & 0x3200) | (tempw & 0x4dd5) | 2;
flags_extract();
#ifdef USE_DEBUG_REGS_486
rf_flag_no_clear = 1;
#endif
CLOCK_CYCLES(5);
PREFETCH_RUN(5, 1, -1, 1, 0, 0, 0, 0);
@@ -211,6 +214,9 @@ opPOPF_286(uint32_t fetchdat)
else
cpu_state.flags = (cpu_state.flags & 0x3200) | (tempw & 0x4dd5) | 2;
flags_extract();
#ifdef USE_DEBUG_REGS_486
rf_flag_no_clear = 1;
#endif
CLOCK_CYCLES(5);
PREFETCH_RUN(5, 1, -1, 1, 0, 0, 0, 0);
@@ -264,6 +270,9 @@ opPOPF(uint32_t fetchdat)
cpu_state.flags = (cpu_state.flags & 0x3200) | (tempw & 0x4dd5) | 2;
}
flags_extract();
#ifdef USE_DEBUG_REGS_486
rf_flag_no_clear = 1;
#endif
CLOCK_CYCLES(5);
PREFETCH_RUN(5, 1, -1, 1, 0, 0, 0, 0);
@@ -307,6 +316,9 @@ opPOPFD(uint32_t fetchdat)
cpu_state.eflags = (templ >> 16) & 3;
flags_extract();
#ifdef USE_DEBUG_REGS_486
rf_flag_no_clear = 1;
#endif
CLOCK_CYCLES(5);
PREFETCH_RUN(5, 1, -1, 0, 1, 0, 0, 0);