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drcbex64: some more micro-optimization (nw)

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This commit is contained in:
Ville Linde 2016-05-12 16:14:18 +03:00
parent 392ceebfad
commit c68fc7294c
1 changed files with 26 additions and 14 deletions
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40
src/devices/cpu/drcbex64.cpp
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@ -4725,22 +4725,24 @@ void drcbe_x64::op_muls(x86code *&dst, const instruction &inst)
// 32-bit destination with memory/immediate or register/immediate
if (!compute_hi && !src1p.is_immediate() && src2p.is_immediate())
{
int dstreg = dstp.is_int_register() ? dstp.ireg() : REG_EAX;
if (src1p.is_memory())
emit_imul_r32_m32_imm(dst, REG_EAX, MABS(src1p.memory()), src2p.immediate()); // imul eax,[src1p],src2p
emit_imul_r32_m32_imm(dst, dstreg, MABS(src1p.memory()), src2p.immediate()); // imul dstreg,[src1p],src2p
else if (src1p.is_int_register())
emit_imul_r32_r32_imm(dst, REG_EAX, src1p.ireg(), src2p.immediate()); // imul eax,src1p,src2p
emit_mov_p32_r32(dst, dstp, REG_EAX); // mov dstp,eax
emit_imul_r32_r32_imm(dst, dstreg, src1p.ireg(), src2p.immediate()); // imul dstreg,src1p,src2p
emit_mov_p32_r32(dst, dstp, dstreg); // mov dstp,eax
}
// 32-bit destination, general case
else if (!compute_hi)
{
emit_mov_r32_p32(dst, REG_EAX, src1p); // mov eax,src1p
int dstreg = dstp.is_int_register() ? dstp.ireg() : REG_EAX;
emit_mov_r32_p32(dst, dstreg, src1p); // mov dstreg,src1p
if (src2p.is_memory())
emit_imul_r32_m32(dst, REG_EAX, MABS(src2p.memory())); // imul eax,[src2p]
emit_imul_r32_m32(dst, dstreg, MABS(src2p.memory())); // imul dstreg,[src2p]
else if (src2p.is_int_register())
emit_imul_r32_r32(dst, REG_EAX, src2p.ireg()); // imul eax,src2p
emit_mov_p32_r32(dst, dstp, REG_EAX); // mov dstp,eax
emit_imul_r32_r32(dst, dstreg, src2p.ireg()); // imul dstreg,src2p
emit_mov_p32_r32(dst, dstp, dstreg); // mov dstp,dstreg
}
// 64-bit destination, general case
@ -4803,22 +4805,24 @@ void drcbe_x64::op_muls(x86code *&dst, const instruction &inst)
// 64-bit destination with memory/immediate or register/immediate
if (!compute_hi && !src1p.is_immediate() && src2p.is_immediate() && short_immediate(src2p.immediate()))
{
int dstreg = dstp.is_int_register() ? dstp.ireg() : REG_RAX;
if (src1p.is_memory())
emit_imul_r64_m64_imm(dst, REG_RAX, MABS(src1p.memory()), src2p.immediate());// imul rax,[src1p],src2p
emit_imul_r64_m64_imm(dst, dstreg, MABS(src1p.memory()), src2p.immediate());// imul dstreg,[src1p],src2p
else if (src1p.is_int_register())
emit_imul_r64_r64_imm(dst, REG_RAX, src1p.ireg(), src2p.immediate()); // imul rax,src1p,src2p
emit_mov_p64_r64(dst, dstp, REG_RAX); // mov dstp,rax
emit_imul_r64_r64_imm(dst, dstreg, src1p.ireg(), src2p.immediate()); // imul rax,src1p,src2p
emit_mov_p64_r64(dst, dstp, dstreg); // mov dstp,rax
}
// 64-bit destination, general case
else if (!compute_hi)
{
emit_mov_r64_p64(dst, REG_RAX, src1p); // mov rax,src1p
int dstreg = dstp.is_int_register() ? dstp.ireg() : REG_RAX;
emit_mov_r64_p64(dst, dstreg, src1p); // mov dstreg,src1p
if (src2p.is_memory())
emit_imul_r64_m64(dst, REG_RAX, MABS(src2p.memory())); // imul rax,[src2p]
emit_imul_r64_m64(dst, dstreg, MABS(src2p.memory())); // imul dstreg,[src2p]
else if (src2p.is_int_register())
emit_imul_r64_r64(dst, REG_RAX, src2p.ireg()); // imul rax,src2p
emit_mov_p64_r64(dst, dstp, REG_RAX); // mov dstp,rax
emit_imul_r64_r64(dst, dstreg, src2p.ireg()); // imul dstreg,src2p
emit_mov_p64_r64(dst, dstp, dstreg); // mov dstp,dstreg
}
// 128-bit destination, general case
@ -5259,6 +5263,10 @@ void drcbe_x64::op_xor(x86code *&dst, const instruction &inst)
else if (dstp.is_memory() && dstp == src2p)
emit_xor_m32_p32(dst, MABS(dstp.memory()), src1p, inst); // xor [dstp],src1p
// dstp == src1p register
else if (dstp.is_int_register() && dstp == src1p)
emit_xor_r32_p32(dst, dstp.ireg(), src2p, inst); // xor dstp,src2p
// general case
else
{
@ -5279,6 +5287,10 @@ void drcbe_x64::op_xor(x86code *&dst, const instruction &inst)
else if (dstp.is_memory() && dstp == src2p)
emit_xor_m64_p64(dst, MABS(dstp.memory()), src1p, inst); // xor [dstp],src1p
// dstp == src1p register
else if (dstp.is_int_register() && dstp == src1p)
emit_xor_r64_p64(dst, dstp.ireg(), src2p, inst); // xor dstp,src2p
// general case
else
{