os-k-team/kvisc
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stuff

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julianb0 2019-05-15 21:56:42 +02:00
parent 64167a74c2
commit 2ac01c5ae3
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6 changed files with 6 additions and 147 deletions
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4
instr/INSTRS
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@ -1,5 +1,5 @@
# The OS/K Team licences this file to you under the MIT license.
# See the LICENCE file in the project root for more information.
# See the LICENSE file in the project root for more information.
add r r
add r i
@ -19,7 +19,7 @@ sub m m
mul r
mul i
rax = hi(rax * %0)
rdx = hi(rax * %0)
rax = lo(rax * %0)
div r

2
instr/instrs.c
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@ -1,5 +1,5 @@
// The OS/K Team licences this file to you under the MIT license.
// See the LICENCE file in the project root for more information.
// See the LICENSE file in the project root for more information.
#include "instrs.h"

2
instr/instrs.h
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@ -1,5 +1,5 @@
// The OS/K Team licences this file to you under the MIT license.
// See the LICENCE file in the project root for more information.
// See the LICENSE file in the project root for more information.
#include "arch.h"

2
instr/instrs.py
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@ -1,7 +1,7 @@
#!/usr/bin/python
# The OS/K Team licences this file to you under the MIT license.
# See the LICENCE file in the project root for more information.
# See the LICENSE file in the project root for more information.
fi = open("instr/INSTRS")
hd = open("instr/arch_i.h", "w")

141
instrs.c
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@ -1,141 +0,0 @@
// The OS/K Team licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
#include "arch.h"
void i_add(ctx_t *ctx, acc_t *p1, acc_t *p2)
{
if (p1->type != A_REG) {
_except(ctx, E_ILL, "ADD into IMM");
}
if (p1->mem || p2->mem) {
_except(ctx, E_IMP, "Memory access");
}
ctx->r[p1->val].val += p2->type >= A_IMM16 ? p2->val
: ctx->r[p2->val].val;
}
void i_sub(ctx_t *ctx, acc_t *p1, acc_t *p2)
{
if (p1->type != A_REG) {
_except(ctx, E_ILL, "SUB into IMM");
}
if (p1->mem || p2->mem) {
_except(ctx, E_IMP, "Memory access");
}
ctx->r[p1->val].val -= p2->type >= A_IMM16 ? p2->val
: ctx->r[p2->val].val;
}
void i_mul(ctx_t *ctx, acc_t *p1, acc_t *p2)
{
if (p1->mem) {
_except(ctx, E_IMP, "Memory access");
}
// Adapted from www.codeproject.com/Tips/618570/UInt-Multiplication-Squaring
ulong u = p1->type >= A_IMM16 ? p1->val : ctx->r[p1->val].val;
ulong v = ctx->r[RAX].val;
ulong u1 = u & 0xffffffff;
ulong v1 = v & 0xffffffff;
ulong t = (u1 * v1);
ulong w3 = (t & 0xffffffff);
ulong k = (t >> 32);
u >>= 32;
t = (u * v1) + k;
k = (t & 0xffffffff);
ulong w1 = (t >> 32);
v >>= 32;
t = (u1 * v) + k;
k = (t >> 32);
ctx->r[RDX].val = (u * v) + w1 + k;
ctx->r[RAX].val = (t << 32) + w3;
}
void i_div(ctx_t *ctx, acc_t *p1, acc_t *p2)
{
if (p1->mem) {
_except(ctx, E_IMP, "Memory access");
}
ulong val = p1->type >= A_IMM16 ? p1->val : ctx->r[p1->val].val;
ctx->r[RDX].val = ctx->r[RAX].val % val;
ctx->r[RAX].val = ctx->r[RAX].val / val;
}
void i_inc(ctx_t *ctx, acc_t *p1, acc_t *p2)
{
if (p1->type != A_REG) {
_except(ctx, E_ILL, "INC on an IMM");
}
if (p1->mem) {
_except(ctx, E_IMP, "Memory access");
}
ctx->r[p1->val].val++;
}
void i_dec(ctx_t *ctx, acc_t *p1, acc_t *p2)
{
if (p1->type != A_REG) {
_except(ctx, E_ILL, "DEC on an IMM");
}
if (p1->mem) {
_except(ctx, E_IMP, "Memory access");
}
ctx->r[p1->val].val--;
}
void i_mov(ctx_t *ctx, acc_t *p1, acc_t *p2)
{
if (p1->type != A_REG) {
_except(ctx, E_ILL, "MOV into IMM");
}
if (p1->mem || p2->mem) {
_except(ctx, E_IMP, "Memory access");
}
ctx->r[p1->val].val = p2->type >= A_IMM16 ? p2->val
: ctx->r[p2->val].val;
}
void i_xchg(ctx_t *ctx, acc_t *p1, acc_t *p2)
{
if (p1->type != A_REG || p2->type != A_REG) {
_except(ctx, E_ILL, "XCHG of IMM(s)");
}
if (p1->mem || p2->mem) {
_except(ctx, E_IMP, "Memory access");
}
ulong temp = ctx->r[p1->val].val;
ctx->r[p1->val].val = ctx->r[p2->val].val;
ctx->r[p2->val].val = temp;
}
instr_t arch_i[NINSTRS] =
{
[I_ADD] = { "ADD", 2, i_add },
[I_SUB] = { "SUB", 2, i_sub },
[I_MUL] = { "MUL", 1, i_mul },
[I_DIV] = { "DIV", 1, i_div },
[I_INC] = { "INC", 1, i_inc },
[I_DEC] = { "DEC", 1, i_dec },
[I_MOV] = { "MOV", 2, i_mov },
[I_XCHG] = { "XCHG", 2, i_xchg },
};

2
karch/main.c
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@ -1,5 +1,5 @@
// The OS/K Team licences this file to you under the MIT license.
// See the LICENCE file in the project root for more information.
// See the LICENSE file in the project root for more information.
#include "arch.h"