#include "status_w.h"
#include "control_w.h"
-
static void fnop(void)
{
}
static void fclex(void)
{
- partial_status &= ~(SW_Backward|SW_Summary|SW_Stack_Fault|SW_Precision|
- SW_Underflow|SW_Overflow|SW_Zero_Div|SW_Denorm_Op|
- SW_Invalid);
- no_ip_update = 1;
+ partial_status &=
+ ~(SW_Backward | SW_Summary | SW_Stack_Fault | SW_Precision |
+ SW_Underflow | SW_Overflow | SW_Zero_Div | SW_Denorm_Op |
+ SW_Invalid);
+ no_ip_update = 1;
}
/* Needs to be externally visible */
void finit(void)
{
- control_word = 0x037f;
- partial_status = 0;
- top = 0; /* We don't keep top in the status word internally. */
- fpu_tag_word = 0xffff;
- /* The behaviour is different from that detailed in
- Section 15.1.6 of the Intel manual */
- operand_address.offset = 0;
- operand_address.selector = 0;
- instruction_address.offset = 0;
- instruction_address.selector = 0;
- instruction_address.opcode = 0;
- no_ip_update = 1;
+ control_word = 0x037f;
+ partial_status = 0;
+ top = 0; /* We don't keep top in the status word internally. */
+ fpu_tag_word = 0xffff;
+ /* The behaviour is different from that detailed in
+ Section 15.1.6 of the Intel manual */
+ operand_address.offset = 0;
+ operand_address.selector = 0;
+ instruction_address.offset = 0;
+ instruction_address.selector = 0;
+ instruction_address.opcode = 0;
+ no_ip_update = 1;
}
/*
#define fsetpm fnop
static FUNC const finit_table[] = {
- feni, fdisi, fclex, finit,
- fsetpm, FPU_illegal, FPU_illegal, FPU_illegal
+ feni, fdisi, fclex, finit,
+ fsetpm, FPU_illegal, FPU_illegal, FPU_illegal
};
void finit_(void)
{
- (finit_table[FPU_rm])();
+ (finit_table[FPU_rm]) ();
}
-
static void fstsw_ax(void)
{
- *(short *) &FPU_EAX = status_word();
- no_ip_update = 1;
+ *(short *)&FPU_EAX = status_word();
+ no_ip_update = 1;
}
static FUNC const fstsw_table[] = {
- fstsw_ax, FPU_illegal, FPU_illegal, FPU_illegal,
- FPU_illegal, FPU_illegal, FPU_illegal, FPU_illegal
+ fstsw_ax, FPU_illegal, FPU_illegal, FPU_illegal,
+ FPU_illegal, FPU_illegal, FPU_illegal, FPU_illegal
};
void fstsw_(void)
{
- (fstsw_table[FPU_rm])();
+ (fstsw_table[FPU_rm]) ();
}
-
static FUNC const fp_nop_table[] = {
- fnop, FPU_illegal, FPU_illegal, FPU_illegal,
- FPU_illegal, FPU_illegal, FPU_illegal, FPU_illegal
+ fnop, FPU_illegal, FPU_illegal, FPU_illegal,
+ FPU_illegal, FPU_illegal, FPU_illegal, FPU_illegal
};
void fp_nop(void)
{
- (fp_nop_table[FPU_rm])();
+ (fp_nop_table[FPU_rm]) ();
}
-
void fld_i_(void)
{
- FPU_REG *st_new_ptr;
- int i;
- u_char tag;
-
- if ( STACK_OVERFLOW )
- { FPU_stack_overflow(); return; }
-
- /* fld st(i) */
- i = FPU_rm;
- if ( NOT_EMPTY(i) )
- {
- reg_copy(&st(i), st_new_ptr);
- tag = FPU_gettagi(i);
- push();
- FPU_settag0(tag);
- }
- else
- {
- if ( control_word & CW_Invalid )
- {
- /* The masked response */
- FPU_stack_underflow();
+ FPU_REG *st_new_ptr;
+ int i;
+ u_char tag;
+
+ if (STACK_OVERFLOW) {
+ FPU_stack_overflow();
+ return;
}
- else
- EXCEPTION(EX_StackUnder);
- }
-}
+ /* fld st(i) */
+ i = FPU_rm;
+ if (NOT_EMPTY(i)) {
+ reg_copy(&st(i), st_new_ptr);
+ tag = FPU_gettagi(i);
+ push();
+ FPU_settag0(tag);
+ } else {
+ if (control_word & CW_Invalid) {
+ /* The masked response */
+ FPU_stack_underflow();
+ } else
+ EXCEPTION(EX_StackUnder);
+ }
+}
void fxch_i(void)
{
- /* fxch st(i) */
- FPU_REG t;
- int i = FPU_rm;
- FPU_REG *st0_ptr = &st(0), *sti_ptr = &st(i);
- long tag_word = fpu_tag_word;
- int regnr = top & 7, regnri = ((regnr + i) & 7);
- u_char st0_tag = (tag_word >> (regnr*2)) & 3;
- u_char sti_tag = (tag_word >> (regnri*2)) & 3;
-
- if ( st0_tag == TAG_Empty )
- {
- if ( sti_tag == TAG_Empty )
- {
- FPU_stack_underflow();
- FPU_stack_underflow_i(i);
- return;
+ /* fxch st(i) */
+ FPU_REG t;
+ int i = FPU_rm;
+ FPU_REG *st0_ptr = &st(0), *sti_ptr = &st(i);
+ long tag_word = fpu_tag_word;
+ int regnr = top & 7, regnri = ((regnr + i) & 7);
+ u_char st0_tag = (tag_word >> (regnr * 2)) & 3;
+ u_char sti_tag = (tag_word >> (regnri * 2)) & 3;
+
+ if (st0_tag == TAG_Empty) {
+ if (sti_tag == TAG_Empty) {
+ FPU_stack_underflow();
+ FPU_stack_underflow_i(i);
+ return;
+ }
+ if (control_word & CW_Invalid) {
+ /* Masked response */
+ FPU_copy_to_reg0(sti_ptr, sti_tag);
+ }
+ FPU_stack_underflow_i(i);
+ return;
}
- if ( control_word & CW_Invalid )
- {
- /* Masked response */
- FPU_copy_to_reg0(sti_ptr, sti_tag);
+ if (sti_tag == TAG_Empty) {
+ if (control_word & CW_Invalid) {
+ /* Masked response */
+ FPU_copy_to_regi(st0_ptr, st0_tag, i);
+ }
+ FPU_stack_underflow();
+ return;
}
- FPU_stack_underflow_i(i);
- return;
- }
- if ( sti_tag == TAG_Empty )
- {
- if ( control_word & CW_Invalid )
- {
- /* Masked response */
- FPU_copy_to_regi(st0_ptr, st0_tag, i);
- }
- FPU_stack_underflow();
- return;
- }
- clear_C1();
-
- reg_copy(st0_ptr, &t);
- reg_copy(sti_ptr, st0_ptr);
- reg_copy(&t, sti_ptr);
-
- tag_word &= ~(3 << (regnr*2)) & ~(3 << (regnri*2));
- tag_word |= (sti_tag << (regnr*2)) | (st0_tag << (regnri*2));
- fpu_tag_word = tag_word;
-}
+ clear_C1();
+ reg_copy(st0_ptr, &t);
+ reg_copy(sti_ptr, st0_ptr);
+ reg_copy(&t, sti_ptr);
+
+ tag_word &= ~(3 << (regnr * 2)) & ~(3 << (regnri * 2));
+ tag_word |= (sti_tag << (regnr * 2)) | (st0_tag << (regnri * 2));
+ fpu_tag_word = tag_word;
+}
void ffree_(void)
{
- /* ffree st(i) */
- FPU_settagi(FPU_rm, TAG_Empty);
+ /* ffree st(i) */
+ FPU_settagi(FPU_rm, TAG_Empty);
}
-
void ffreep(void)
{
- /* ffree st(i) + pop - unofficial code */
- FPU_settagi(FPU_rm, TAG_Empty);
- FPU_pop();
+ /* ffree st(i) + pop - unofficial code */
+ FPU_settagi(FPU_rm, TAG_Empty);
+ FPU_pop();
}
-
void fst_i_(void)
{
- /* fst st(i) */
- FPU_copy_to_regi(&st(0), FPU_gettag0(), FPU_rm);
+ /* fst st(i) */
+ FPU_copy_to_regi(&st(0), FPU_gettag0(), FPU_rm);
}
-
void fstp_i(void)
{
- /* fstp st(i) */
- FPU_copy_to_regi(&st(0), FPU_gettag0(), FPU_rm);
- FPU_pop();
+ /* fstp st(i) */
+ FPU_copy_to_regi(&st(0), FPU_gettag0(), FPU_rm);
+ FPU_pop();
}
-
projects / linux-flexiantxendom0-3.2.10.git / blobdiff