Hi, Xiantao and Anthony
>+void getfpreg(unsigned long regnum, struct ia64_fpreg *fpval,
>+ struct kvm_pt_regs *regs)
>+{
>+ /* Take floating register rotation into consideration*/
>+ if (regnum >= IA64_FIRST_ROTATING_FR)
>+ regnum = IA64_FIRST_ROTATING_FR + fph_index(regs,
>regnum);
>+#define CASE_FIXED_FP(reg) \
>+ case (reg) : \
>+ ia64_stf_spill(fpval, reg); \
>+ break
>+
>+ switch (regnum) {
>+ CASE_FIXED_FP(0);
>+ CASE_FIXED_FP(1);
>+ CASE_FIXED_FP(2);
>+ CASE_FIXED_FP(3);
>+ CASE_FIXED_FP(4);
>+ CASE_FIXED_FP(5);
>+
>+ CASE_FIXED_FP(6);
>+ CASE_FIXED_FP(7);
>+ CASE_FIXED_FP(8);
>+ CASE_FIXED_FP(9);
>+ CASE_FIXED_FP(10);
>+ CASE_FIXED_FP(11);
>+
Is this correct ? Though I don't know why xen do so.
In the case of Xen, the above parts are;
#define CASE_SAVED_FP(reg) \
case reg: \
fpval->u.bits[0] = regs->f##reg.u.bits[0]; \
fpval->u.bits[1] = regs->f##reg.u.bits[1]; \
break
CASE_SAVED_FP(6);
CASE_SAVED_FP(7);
CASE_SAVED_FP(8);
CASE_SAVED_FP(9);
CASE_SAVED_FP(10);
CASE_SAVED_FP(11);
>+void setfpreg(unsigned long regnum, struct ia64_fpreg *fpval,
>+ struct kvm_pt_regs *regs)
>+{
>+ /* Take floating register rotation into consideration*/
>+ if (regnum >= IA64_FIRST_ROTATING_FR)
>+ regnum = IA64_FIRST_ROTATING_FR + fph_index(regs,
>regnum);
>+
>+#define CASE_FIXED_FP(reg) \
>+ case (reg) : \
>+ ia64_ldf_fill(reg, fpval); \
>+ break
>+
>+ switch (regnum) {
>+ CASE_FIXED_FP(2);
>+ CASE_FIXED_FP(3);
>+ CASE_FIXED_FP(4);
>+ CASE_FIXED_FP(5);
>+
>+ CASE_FIXED_FP(6);
>+ CASE_FIXED_FP(7);
>+ CASE_FIXED_FP(8);
>+ CASE_FIXED_FP(9);
>+ CASE_FIXED_FP(10);
>+ CASE_FIXED_FP(11);
>+
ditto.
#define CASE_RESTORED_FP(reg) \
case reg: \
regs->f##reg.u.bits[0] = fpval->u.bits[0]; \
regs->f##reg.u.bits[1] = fpval->u.bits[1] ; \
break
CASE_RESTORED_FP(6);
CASE_RESTORED_FP(7);
CASE_RESTORED_FP(8);
CASE_RESTORED_FP(9);
CASE_RESTORED_FP(10);
CASE_RESTORED_FP(11);
Best Regards,
Akio Takebe
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