[kvm-commits] KVM: x86 emulator: Implement emulation of instruction: inc & dec

[Avi Kivity]

repository: /home/avi/kvm/linux-2.6
branch: master
commit d8a0c28def19005173b0e4edcaa120b865eaac6d
Author: Nitin A Kamble <[EMAIL PROTECTED]>
Date:   Fri Oct 12 17:40:33 2007 -0700

    KVM: x86 emulator: Implement emulation of instruction: inc & dec
    
    Instructions:
        inc r16/r32 (opcode 0x40-0x47)
        dec r16/r32 (opcode 0x48-0x4f)
    
    Signed-off-by: Nitin A Kamble <[EMAIL PROTECTED]>
    Signed-off-by: Avi Kivity <[EMAIL PROTECTED]>

diff --git a/drivers/kvm/x86_emulate.c b/drivers/kvm/x86_emulate.c
index e974ace..5aada55 100644
--- a/drivers/kvm/x86_emulate.c
+++ b/drivers/kvm/x86_emulate.c
@@ -96,8 +96,12 @@ static u8 opcode_table[256] = {
        ByteOp | DstMem | SrcReg | ModRM, DstMem | SrcReg | ModRM,
        ByteOp | DstReg | SrcMem | ModRM, DstReg | SrcMem | ModRM,
        0, 0, 0, 0,
-       /* 0x40 - 0x4F */
-       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+       /* 0x40 - 0x47 */
+       ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
+       ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
+       /* 0x48 - 0x4F */
+       ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
+       ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
        /* 0x50 - 0x57 */
        ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
        ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
@@ -1372,6 +1376,18 @@ special_insn:
        if (c->twobyte)
                goto twobyte_special_insn;
        switch (c->b) {
+       case 0x40 ... 0x47: /* inc r16/r32 */
+               c->dst.bytes = c->op_bytes;
+               c->dst.ptr = (unsigned long *)&c->regs[c->b & 0x7];
+               c->dst.val = *c->dst.ptr;
+               emulate_1op("inc", c->dst, ctxt->eflags);
+               break;
+       case 0x48 ... 0x4f: /* dec r16/r32 */
+               c->dst.bytes = c->op_bytes;
+               c->dst.ptr = (unsigned long *)&c->regs[c->b & 0x7];
+               c->dst.val = *c->dst.ptr;
+               emulate_1op("dec", c->dst, ctxt->eflags);
+               break;
        case 0x50 ... 0x57:  /* push reg */
                if (c->op_bytes == 2)
                        c->src.val = (u16) c->regs[c->b & 0x7];

-------------------------------------------------------------------------
This SF.net email is sponsored by: Splunk Inc.
Still grepping through log files to find problems?  Stop.
Now Search log events and configuration files using AJAX and a browser.
Download your FREE copy of Splunk now >> http://get.splunk.com/
_______________________________________________
kvm-commits mailing list
kvm-commits@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/kvm-commits