mirror of https://github.com/bochs-emu/Bochs
bit.cc speedup (small)
This commit is contained in:
Stanislav Shwartsman
parent
6d65c2701a
commit
1e0db62984
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@ -1,5 +1,5 @@
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/////////////////////////////////////////////////////////////////////////
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// $Id: bit.cc,v 1.37 2007-11-18 18:24:45 sshwarts Exp $
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// $Id: bit.cc,v 1.38 2007-11-18 20:21:34 sshwarts Exp $
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/////////////////////////////////////////////////////////////////////////
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//
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// Copyright (C) 2001 MandrakeSoft S.A.
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@ -36,12 +36,7 @@
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void BX_CPU_C::SETO_Eb(bxInstruction_c *i)
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{
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Bit8u result_8;
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if (get_OF())
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result_8 = 1;
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else
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result_8 = 0;
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Bit8u result_8 = getB_OF();
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/* now write result back to destination */
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if (i->modC0()) {
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@ -54,12 +49,7 @@ void BX_CPU_C::SETO_Eb(bxInstruction_c *i)
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void BX_CPU_C::SETNO_Eb(bxInstruction_c *i)
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{
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Bit8u result_8;
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if (get_OF()==0)
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result_8 = 1;
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else
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result_8 = 0;
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Bit8u result_8 = !getB_OF();
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/* now write result back to destination */
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if (i->modC0()) {
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@ -72,12 +62,7 @@ void BX_CPU_C::SETNO_Eb(bxInstruction_c *i)
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void BX_CPU_C::SETB_Eb(bxInstruction_c *i)
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{
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Bit8u result_8;
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if (get_CF())
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result_8 = 1;
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else
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result_8 = 0;
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Bit8u result_8 = getB_CF();
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/* now write result back to destination */
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if (i->modC0()) {
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@ -90,12 +75,7 @@ void BX_CPU_C::SETB_Eb(bxInstruction_c *i)
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void BX_CPU_C::SETNB_Eb(bxInstruction_c *i)
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{
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Bit8u result_8;
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if (get_CF()==0)
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result_8 = 1;
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else
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result_8 = 0;
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Bit8u result_8 = !getB_CF();
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/* now write result back to destination */
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if (i->modC0()) {
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@ -108,12 +88,7 @@ void BX_CPU_C::SETNB_Eb(bxInstruction_c *i)
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void BX_CPU_C::SETZ_Eb(bxInstruction_c *i)
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{
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Bit8u result_8;
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if (get_ZF())
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result_8 = 1;
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else
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result_8 = 0;
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Bit8u result_8 = getB_ZF();
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/* now write result back to destination */
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if (i->modC0()) {
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@ -126,12 +101,7 @@ void BX_CPU_C::SETZ_Eb(bxInstruction_c *i)
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void BX_CPU_C::SETNZ_Eb(bxInstruction_c *i)
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{
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Bit8u result_8;
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if (get_ZF()==0)
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result_8 = 1;
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else
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result_8 = 0;
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Bit8u result_8 = !getB_ZF();
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/* now write result back to destination */
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if (i->modC0()) {
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@ -144,12 +114,7 @@ void BX_CPU_C::SETNZ_Eb(bxInstruction_c *i)
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void BX_CPU_C::SETBE_Eb(bxInstruction_c *i)
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{
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Bit8u result_8;
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if (get_CF() || get_ZF())
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result_8 = 1;
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else
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result_8 = 0;
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Bit8u result_8 = (getB_CF() | getB_ZF());
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/* now write result back to destination */
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if (i->modC0()) {
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@ -162,12 +127,7 @@ void BX_CPU_C::SETBE_Eb(bxInstruction_c *i)
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void BX_CPU_C::SETNBE_Eb(bxInstruction_c *i)
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{
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Bit8u result_8;
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if ((get_CF()==0) && (get_ZF()==0))
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result_8 = 1;
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else
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result_8 = 0;
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Bit8u result_8 = !(getB_CF() | getB_ZF());
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/* now write result back to destination */
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if (i->modC0()) {
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@ -180,12 +140,7 @@ void BX_CPU_C::SETNBE_Eb(bxInstruction_c *i)
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void BX_CPU_C::SETS_Eb(bxInstruction_c *i)
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{
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Bit8u result_8;
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if (get_SF())
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result_8 = 1;
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else
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result_8 = 0;
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Bit8u result_8 = getB_SF();
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/* now write result back to destination */
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if (i->modC0()) {
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@ -198,12 +153,7 @@ void BX_CPU_C::SETS_Eb(bxInstruction_c *i)
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void BX_CPU_C::SETNS_Eb(bxInstruction_c *i)
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{
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Bit8u result_8;
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if (get_SF()==0)
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result_8 = 1;
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else
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result_8 = 0;
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Bit8u result_8 = !getB_SF();
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/* now write result back to destination */
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if (i->modC0()) {
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@ -216,12 +166,7 @@ void BX_CPU_C::SETNS_Eb(bxInstruction_c *i)
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void BX_CPU_C::SETP_Eb(bxInstruction_c *i)
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{
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Bit8u result_8;
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if (get_PF())
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result_8 = 1;
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else
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result_8 = 0;
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Bit8u result_8 = getB_PF();
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/* now write result back to destination */
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if (i->modC0()) {
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@ -234,12 +179,7 @@ void BX_CPU_C::SETP_Eb(bxInstruction_c *i)
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void BX_CPU_C::SETNP_Eb(bxInstruction_c *i)
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{
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Bit8u result_8;
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if (get_PF() == 0)
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result_8 = 1;
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else
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result_8 = 0;
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Bit8u result_8 = !getB_PF();
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/* now write result back to destination */
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if (i->modC0()) {
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@ -552,7 +492,7 @@ void BX_CPU_C::BSWAP_RRX(bxInstruction_c *i)
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BX_WRITE_64BIT_REG(i->opcodeReg(), val64);
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}
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#endif // #if BX_SUPPORT_X86_64
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#endif
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void BX_CPU_C::BT_EwGwM(bxInstruction_c *i)
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{
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@ -1,5 +1,5 @@
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/////////////////////////////////////////////////////////////////////////
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// $Id: fetchdecode64.cc,v 1.139 2007-11-18 19:46:14 sshwarts Exp $
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// $Id: fetchdecode64.cc,v 1.140 2007-11-18 20:21:34 sshwarts Exp $
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/////////////////////////////////////////////////////////////////////////
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//
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// Copyright (C) 2001 MandrakeSoft S.A.
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@ -3514,9 +3514,9 @@ fetch_b1:
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instruction->assertOs32();
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offset = 512*2;
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}
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if (rex_prefix & 0x4) rex_r = 8;
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if (rex_prefix & 0x2) rex_x = 8;
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if (rex_prefix & 0x1) rex_b = 8;
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rex_r = ((rex_prefix & 0x4) << 1);
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rex_x = ((rex_prefix & 0x2) << 2);
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rex_b = ((rex_prefix & 0x1) << 3);
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}
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// handle 2-byte escape
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