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Commit d1eef45d authored by Avi Kivity's avatar Avi Kivity
Browse files

KVM: x86 emulator: simplify emulate_1op() 



emulate_1op() is always called with the same parameters.  Simplify
by passing just the emulation context.

Signed-off-by: default avatarAvi Kivity <avi@redhat.com>
Signed-off-by: default avatarMarcelo Tosatti <mtosatti@redhat.com>
parent 29053a60

arch/x86/kvm/emulate.c

+13 −13
Original line number Diff line number Diff line
@@ -298,7 +298,7 @@ struct gprefix { 
		}							\

	} while (0)



#define __emulate_1op(_op, _dst, _eflags, _suffix)			\

#define __emulate_1op(ctxt, _op, _suffix)				\

	do {								\

		unsigned long _tmp;					\

									\
@@ -306,19 +306,19 @@ struct gprefix { 
			_PRE_EFLAGS("0", "3", "2")			\

			_op _suffix " %1; "				\

			_POST_EFLAGS("0", "3", "2")			\

			: "=m" (_eflags), "+m" ((_dst).val),		\

			: "=m" ((ctxt)->eflags), "+m" ((ctxt)->dst.val), \

			  "=&r" (_tmp)					\

			: "i" (EFLAGS_MASK));				\

	} while (0)



/* Instruction has only one explicit operand (no source operand). */

#define emulate_1op(_op, _dst, _eflags)                                    \

#define emulate_1op(ctxt, _op)						\

	do {								\

		switch ((_dst).bytes) {				        \

		case 1:	__emulate_1op(_op, _dst, _eflags, "b"); break;	\

		case 2:	__emulate_1op(_op, _dst, _eflags, "w"); break;	\

		case 4:	__emulate_1op(_op, _dst, _eflags, "l"); break;	\

		case 8:	ON64(__emulate_1op(_op, _dst, _eflags, "q")); break; \

		switch ((ctxt)->dst.bytes) {				\

		case 1:	__emulate_1op(ctxt, _op, "b"); break;		\

		case 2:	__emulate_1op(ctxt, _op, "w"); break;		\

		case 4:	__emulate_1op(ctxt, _op, "l"); break;		\

		case 8:	ON64(__emulate_1op(ctxt, _op, "q")); break;	\

		}							\

	} while (0)
@@ -1715,7 +1715,7 @@ static int em_grp3(struct x86_emulate_ctxt *ctxt) 
		ctxt->dst.val = ~ctxt->dst.val;

		break;

	case 3:	/* neg */

		emulate_1op("neg", ctxt->dst, ctxt->eflags);

		emulate_1op(ctxt, "neg");

		break;

	case 4: /* mul */

		emulate_1op_rax_rdx("mul", ctxt->src, *rax, *rdx, ctxt->eflags);
@@ -1745,10 +1745,10 @@ static int em_grp45(struct x86_emulate_ctxt *ctxt) 


	switch (ctxt->modrm_reg) {

	case 0:	/* inc */

		emulate_1op("inc", ctxt->dst, ctxt->eflags);

		emulate_1op(ctxt, "inc");

		break;

	case 1:	/* dec */

		emulate_1op("dec", ctxt->dst, ctxt->eflags);

		emulate_1op(ctxt, "dec");

		break;

	case 2: /* call near abs */ {

		long int old_eip;
@@ -3849,10 +3849,10 @@ int x86_emulate_insn(struct x86_emulate_ctxt *ctxt) 
		rc = emulate_pop_sreg(ctxt, VCPU_SREG_DS);

		break;

	case 0x40 ... 0x47: /* inc r16/r32 */

		emulate_1op("inc", ctxt->dst, ctxt->eflags);

		emulate_1op(ctxt, "inc");

		break;

	case 0x48 ... 0x4f: /* dec r16/r32 */

		emulate_1op("dec", ctxt->dst, ctxt->eflags);

		emulate_1op(ctxt, "dec");

		break;

	case 0x63:		/* movsxd */

		if (ctxt->mode != X86EMUL_MODE_PROT64)