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Implemented pop, push and flag variations...

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This commit is contained in:
xolatile
2024-07-17 09:44:14 -04:00
parent ef1b244239
commit 913c9b88a8
4 changed files with 129 additions and 73 deletions
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69
source/assembler.c
View File

@ -8,7 +8,7 @@
#define IRREGULAR_BEGIN (INC)
#define IRREGULAR_END (IDIV)
#define SPECIAL_1_BEGIN (NOP)
#define SPECIAL_1_END (HLT)
#define SPECIAL_1_END (PUSHF)
#define SPECIAL_2_BEGIN (SYSENTER)
#define SPECIAL_2_END (CPUID)
#define JUMP_IF_BEGIN (JO)
@ -18,7 +18,7 @@
#define REGULAR_COUNT (REGULAR_END - REGULAR_BEGIN + 1) // 16
#define IRREGULAR_COUNT (IRREGULAR_END - IRREGULAR_BEGIN + 1) // 16
#define SPECIAL_1_COUNT (SPECIAL_1_END - SPECIAL_1_BEGIN + 1) // 6
#define SPECIAL_1_COUNT (SPECIAL_1_END - SPECIAL_1_BEGIN + 1) // 8
#define SPECIAL_2_COUNT (SPECIAL_2_END - SPECIAL_2_BEGIN + 1) // 6
#define JUMP_IF_COUNT (JUMP_IF_END - JUMP_IF_BEGIN + 1) // 16
#define MOVE_IF_COUNT (MOVE_IF_END - MOVE_IF_BEGIN + 1) // 16
@ -219,9 +219,9 @@ static void build_irregular (operation_index operation,
}
static void build_special_1 (operation_index operation) {
// nop, retn, retf, leave, lock, hlt
// nop, retn, retf, leave, lock, hlt, popf, pushf
const byte data [1 * SPECIAL_1_COUNT] = {
0x90, 0xc3, 0xcb, 0xc9, 0xf0, 0xf4
0x90, 0xc3, 0xcb, 0xc9, 0xf0, 0xf4, 0x9d, 0x9c
};
input (1, data [operation - SPECIAL_1_BEGIN]);
@ -328,9 +328,59 @@ static void build_move (size_index size,
static void build_call (type_index from,
next source) {
// call
input ((from == REG) && (upper ((form) source)), (byte) 0x41);
input (from == REL, (byte) 0xe8);
input (from == REG, (byte) 0xff);
input_at (from == REL, D32, source, (next) -(text_sector_size + 4));
input (from == REG, (byte) (0xd0 + 0x01 * (source & 0x07)));
}
/*
static void build_enter (type_index from,
next source) {
// enter
input ((from == REG) && (upper ((form) source)), (byte) 0x41);
input (from == REL, (byte) 0xe8);
input (from == REG, (byte) 0xff);
input_at (from == REL, D32, source, (next) -(text_sector_size + 4));
input (from == REG, (byte) (0xd0 + 0x01 * (source & 0x07)));
}
*/
static void build_pop (size_index size,
type_index to,
next destination) {
// pop
build_short_prefix (size == D16);
input ((to == REG) && (upper ((form) destination)), (byte) 0x41);
input (to == REG, (byte) (0x58 + 0x01 * (destination & 0x07)));
input (to == MEM, (byte) 0x8f);
input (to == MEM, (byte) 0x05);
input_at (to == MEM, D32, destination, 0);
}
static void build_push (size_index size,
type_index from,
next source) {
// push
build_short_prefix (size == D16);
input ((from == REG) && (upper ((form) source)), (byte) 0x41);
input (from == REG, (byte) (0x50 + 0x01 * (source & 0x07)));
input (from == MEM, (byte) 0xff);
input (from == MEM, (byte) 0x35);
input (from == IMM, (byte) 0x68 + 0x02 * (size == D8));
input_at (from == MEM, D32, source, 0);
input_by (from == IMM, size, source);
}
static void assemble_clean_up (void) {
@ -429,6 +479,14 @@ void assemble (next count,
} else if (array [index] == CALL) {
build_call (array [index + 1], array [index + 2]);
index += 2;
} else if (array [index] == POP) {
build_pop (array [index + 1], array [index + 2],
array [index + 3]);
index += 3;
} else if (array [index] == PUSH) {
build_push (array [index + 1], array [index + 2],
array [index + 3]);
index += 3;
} else {
return;
}
@ -438,8 +496,11 @@ void assemble (next count,
for (index = 0; index < empty_holes; ++index) {
next set = 0, get = empty_array [index];
memcpy (& set, & text_sector_byte [get], sizeof (set));
set += empty_store [empty_imbue [index]];
memcpy (& text_sector_byte [get], & set, sizeof (set));
}
}

2
source/assembler.h
View File

@ -29,7 +29,7 @@ typedef enum {
MUL, IMUL, DIV, IDIV,
/* */
NOP, RETN, RETF, LEAVE,
LOCK, HLT,
LOCK, HLT, POPF, PUSHF,
/* */
SYSENTER, SYSEXIT, SYSCALL, SYSRET,
PAUSE, CPUID,