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Implement immediate IMUL operands (#13)

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* Implement immediate IMUL operands

Implement PUSH segment underflow behaviour on SP = 1 values for 8018x

* Limit bit-shifts and rotates to 31 on Intel 8018x

* NEC/8018x ENTER/LEAVE instructions

* NEC/8018x bound checking instruction
This commit is contained in:
Cacodemon345
2022-09-07 18:50:30 +06:00
committed by GitHub
parent 2b0dff2ec6
commit 7b29c30819
2 changed files with 76 additions and 1 deletions
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2
src/cpu/cpu.c
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@@ -373,7 +373,7 @@ cpu_set(void)
unmask_a20_in_smm = 0;
CPUID = cpu_s->cpuid_model;
is8086 = (cpu_s->cpu_type > CPU_8088) && !(cpu_s->cpu_type == CPU_V20) && !(cpu_s->cpu_type == CPU_V30);
is8086 = (cpu_s->cpu_type > CPU_8088) && !(cpu_s->cpu_type == CPU_V20);
is_nec = (cpu_s->cpu_type == CPU_V20) || (cpu_s->cpu_type == CPU_V30);
is186 = (cpu_s->cpu_type == CPU_186) || (cpu_s->cpu_type == CPU_188) || (cpu_s->cpu_type == CPU_V20) || (cpu_s->cpu_type == CPU_V30);
is286 = (cpu_s->cpu_type >= CPU_286);