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Support memory operands to push

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Max Bernstein 2021-02-25 23:22:01 -08:00 • committed by Alan Wu
parent 799d248e31
commit 3a365afaf5
3 changed files with 19 additions and 9 deletions
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21
ujit_asm.c
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@ -1452,17 +1452,22 @@ void popfq(codeblock_t* cb)
cb_write_bytes(cb, 2, 0x48, 0x9D);
}
/// push - Push a register on the stack
void push(codeblock_t* cb, x86opnd_t reg)
/// push - Push an operand on the stack
void push(codeblock_t* cb, x86opnd_t opnd)
{
assert (reg.num_bits == 64);
assert (opnd.num_bits == 64);
//cb.writeASM("push", reg);
//cb.writeASM("push", opnd);
if (rex_needed(reg))
cb_write_rex(cb, false, 0, 0, reg.as.reg.reg_no);
cb_write_opcode(cb, 0x50, reg);
if (opnd.type == OPND_REG) {
if (rex_needed(opnd))
cb_write_rex(cb, false, 0, 0, opnd.as.reg.reg_no);
cb_write_opcode(cb, 0x50, opnd);
} else if (opnd.type == OPND_MEM) {
cb_write_rm(cb, false, false, NO_OPND, opnd, 6, 1, 0xFF);
} else {
assert(false && "unexpected operand type");
}
}
/// pushfq - Push the flags register (64-bit)

2
ujit_asm.h
View file

@ -367,7 +367,7 @@ void not(codeblock_t* cb, x86opnd_t opnd);
void or(codeblock_t* cb, x86opnd_t opnd0, x86opnd_t opnd1);
void pop(codeblock_t* cb, x86opnd_t reg);
void popfq(codeblock_t* cb);
void push(codeblock_t* cb, x86opnd_t reg);
void push(codeblock_t* cb, x86opnd_t opnd);
void pushfq(codeblock_t* cb);
void ret(codeblock_t* cb);
void sal(codeblock_t* cb, x86opnd_t opnd0, x86opnd_t opnd1);

5
ujit_asm_tests.c
View file

@ -284,6 +284,11 @@ void run_tests()
cb_set_pos(cb, 0); push(cb, RAX); check_bytes(cb, "50");
cb_set_pos(cb, 0); push(cb, RBX); check_bytes(cb, "53");
cb_set_pos(cb, 0); push(cb, R12); check_bytes(cb, "4154");
cb_set_pos(cb, 0); push(cb, mem_opnd(64, RAX, 0)); check_bytes(cb, "FF30");
cb_set_pos(cb, 0); push(cb, mem_opnd(64, R8, 0)); check_bytes(cb, "41FF30");
cb_set_pos(cb, 0); push(cb, mem_opnd(64, R8, 3)); check_bytes(cb, "41FF7003");
cb_set_pos(cb, 0); push(cb, mem_opnd_sib(64, RAX, RCX, 8, 3)); check_bytes(cb, "FF74C803");
cb_set_pos(cb, 0); push(cb, mem_opnd_sib(64, R8, RCX, 8, 3)); check_bytes(cb, "41FF74C803");
// ret
cb_set_pos(cb, 0); ret(cb); check_bytes(cb, "C3");