archive/ruby
1
0
Fork 0
mirror of https://github.com/ruby/ruby.git synced 2025-09-17 09:33:59 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions 7

Port print_int, movsx. Implement putself.

Browse source
This commit is contained in:
Maxime Chevalier-Boisvert 2020-09-18 12:20:43 -04:00 • committed by Alan Wu
parent b8a3f2ed61
commit d1c9ca86c1
6 changed files with 127 additions and 31 deletions
Download patch file Download diff file Expand all files Collapse all files

67
ujit_asm.c
View file

@ -1163,6 +1163,73 @@ void mov(codeblock_t* cb, x86opnd_t dst, x86opnd_t src)
}
}
/// movsx - Move with sign extension (signed integers)
void movsx(codeblock_t* cb, x86opnd_t dst, x86opnd_t src)
{
assert (dst.type == OPND_REG);
assert (src.type == OPND_REG || src.type == OPND_MEM);
assert (src.num_bits < dst.num_bits);
//cb.writeASM("movsx", dst, src);
if (src.num_bits == 8)
{
cb_write_rm(cb, dst.num_bits == 16, dst.num_bits == 64, dst, src, 0xFF, 2, 0x0F, 0xBE);
}
else if (src.num_bits == 16)
{
cb_write_rm(cb, dst.num_bits == 16, dst.num_bits == 64, dst, src, 0xFF, 2, 0x0F, 0xBF);
}
else if (src.num_bits == 32)
{
cb_write_rm(cb, false, true, dst, src, 0xFF, 1, 0x63);
}
else
{
assert (false);
}
}
/*
/// movzx - Move with zero extension (unsigned values)
void movzx(codeblock_t* cb, x86opnd_t dst, x86opnd_t src)
{
cb.writeASM("movzx", dst, src);
size_t dstSize;
if (dst.isReg)
dstSize = dst.reg.size;
else
assert (false, "movzx dst must be a register");
size_t srcSize;
if (src.isReg)
srcSize = src.reg.size;
else if (src.isMem)
srcSize = src.mem.size;
else
assert (false);
assert (
srcSize < dstSize,
"movzx: srcSize >= dstSize"
);
if (srcSize is 8)
{
cb.writeRMInstr!('r', 0xFF, 0x0F, 0xB6)(dstSize is 16, dstSize is 64, dst, src);
}
else if (srcSize is 16)
{
cb.writeRMInstr!('r', 0xFF, 0x0F, 0xB7)(dstSize is 16, dstSize is 64, dst, src);
}
else
{
assert (false, "invalid src operand size for movxz");
}
}
*/
// neg - Integer negation (multiplication by -1)
void neg(codeblock_t* cb, x86opnd_t opnd)
{