+2004-09-05 Richard Henderson <rth@redhat.com>
+
+ * sysdeps/alpha/div.S: Save and restore FPCR around fp operations.
+ * sysdeps/alpha/divl.S, sysdeps/alpha/divq.S, sysdeps/alpha/divqu.S,
+ sysdeps/alpha/ldiv.S, sysdeps/alpha/reml.S, sysdeps/alpha/remq.S,
+ sysdeps/alpha/remqu.S: Likewise.
+ * sysdeps/alpha/div_libc.h (FRAME): Increase to 64.
+
2004-09-05 Ulrich Drepper <drepper@redhat.com>
* nscd/cache.c (cache_add): Correctly log GETHOSTBYADDR and
#endif
beq $18, $divbyzero
+ excb
+ mf_fpcr $f10
_ITOFT2 $17, $f0, 0, $18, $f1, 8
cvtqt $f1, $f1
divt/c $f0, $f1, $f0
cvttq/c $f0, $f0
-
+ excb
+ mt_fpcr $f10
_FTOIT $f0, $0, 0
mull $0, $18, $1
/* In order to make the below work, all top-level divide routines must
use the same frame size. */
-#define FRAME 48
+#define FRAME 64
/* Code fragment to generate an integer divide-by-zero fault. When
building libc.so, we arrange for there to be one copy of this code
registers are t10 and t11, the result goes in t12. Only t12 and AT may
be clobbered.
- The FPU can handle all input values except zero. Whee! */
+ The FPU can handle all input values except zero. Whee!
+
+ The FPCR save/restore is due to the fact that the EV6 _will_ set FPCR_INE
+ for cvttq/c even without /sui being set. It will not, however, properly
+ raise the exception, so we don't have to worry about FPCR_INED being clear
+ and so dying by SIGFPE. */
#ifndef EXTEND
#define EXTEND(S,D) sextl S, D
cfi_def_cfa_offset (FRAME)
CALL_MCOUNT
stt $f0, 0(sp)
- stt $f1, 8(sp)
+ excb
beq Y, DIVBYZERO
+
+ stt $f1, 8(sp)
+ stt $f2, 16(sp)
cfi_rel_offset ($f0, 0)
cfi_rel_offset ($f1, 8)
+ cfi_rel_offset ($f2, 16)
+ mf_fpcr $f2
EXTEND (X, RV)
EXTEND (Y, AT)
- _ITOFT2 RV, $f0, 16, AT, $f1, 24
+ _ITOFT2 RV, $f0, 24, AT, $f1, 32
cvtqt $f0, $f0
cvtqt $f1, $f1
divt/c $f0, $f1, $f0
cvttq/c $f0, $f0
- _FTOIT $f0, RV, 16
+ excb
+ mt_fpcr $f2
+ _FTOIT $f0, RV, 24
ldt $f0, 0(sp)
ldt $f1, 8(sp)
+ ldt $f2, 16(sp)
lda sp, FRAME(sp)
cfi_restore ($f0)
cfi_restore ($f1)
+ cfi_restore ($f2)
cfi_def_cfa_offset (0)
sextl RV, RV
ret $31, (RA), 1
When the dividend is outside the range for which we can compute exact
results, we use the fp quotent as an estimate from which we begin refining
an exact integral value. This reduces the number of iterations in the
- shift-and-subtract loop significantly. */
+ shift-and-subtract loop significantly.
+
+ The FPCR save/restore is due to the fact that the EV6 _will_ set FPCR_INE
+ for cvttq/c even without /sui being set. It will not, however, properly
+ raise the exception, so we don't have to worry about FPCR_INED being clear
+ and so dying by SIGFPE. */
.text
.align 4
ready -- all the time in the world to figure out how we're
going to use the results. */
stt $f0, 0(sp)
- stt $f1, 8(sp)
+ excb
beq Y, DIVBYZERO
+
+ stt $f1, 8(sp)
+ stt $f3, 48(sp)
cfi_rel_offset ($f0, 0)
cfi_rel_offset ($f1, 8)
+ cfi_rel_offset ($f3, 48)
+ mf_fpcr $f3
_ITOFT2 X, $f0, 16, Y, $f1, 24
cvtqt $f0, $f0
/* If we get here, we're expecting exact results from the division.
Do nothing else besides convert and clean up. */
cvttq/c $f0, $f0
+ excb
+ mt_fpcr $f3
_FTOIT $f0, RV, 16
ldt $f0, 0(sp)
+ ldt $f3, 48(sp)
cfi_restore ($f1)
cfi_remember_state
cfi_restore ($f0)
+ cfi_restore ($f3)
cfi_def_cfa_offset (0)
lda sp, FRAME(sp)
ret $31, (RA), 1
cfi_rel_offset (t3, 0)
mulq Q, Y, QY
- unop
+ excb
stq t4, 8(sp)
- unop
+ mt_fpcr $f3
cfi_rel_offset (t4, 8)
subq QY, X, R
ldq t3, 0(sp)
ldq t4, 8(sp)
ldq t5, 40(sp)
+ ldt $f3, 48(sp)
lda sp, FRAME(sp)
cfi_remember_state
cfi_restore (t0)
cfi_restore (t3)
cfi_restore (t4)
cfi_restore (t5)
+ cfi_restore ($f3)
cfi_def_cfa_offset (0)
ret $31, (RA), 1
When the dividend is outside the range for which we can compute exact
results, we use the fp quotent as an estimate from which we begin refining
an exact integral value. This reduces the number of iterations in the
- shift-and-subtract loop significantly. */
+ shift-and-subtract loop significantly.
+
+ The FPCR save/restore is due to the fact that the EV6 _will_ set FPCR_INE
+ for cvttq/c even without /sui being set. It will not, however, properly
+ raise the exception, so we don't have to worry about FPCR_INED being clear
+ and so dying by SIGFPE. */
.text
.align 4
ready -- all the time in the world to figure out how we're
going to use the results. */
stt $f0, 0(sp)
- stt $f1, 8(sp)
+ excb
beq Y, DIVBYZERO
+
+ stt $f1, 8(sp)
+ stt $f3, 48(sp)
cfi_rel_offset ($f0, 0)
cfi_rel_offset ($f1, 8)
+ cfi_rel_offset ($f3, 48)
+ mf_fpcr $f3
_ITOFT2 X, $f0, 16, Y, $f1, 24
cvtqt $f0, $f0
divt/c $f0, $f1, $f0
/* Check to see if Y was mis-converted as signed value. */
- .align 4
ldt $f1, 8(sp)
- unop
- nop
blt Y, $y_is_neg
/* Check to see if X fit in the double as an exact value. */
/* If we get here, we're expecting exact results from the division.
Do nothing else besides convert and clean up. */
cvttq/c $f0, $f0
+ excb
+ mt_fpcr $f3
_FTOIT $f0, RV, 16
+
ldt $f0, 0(sp)
+ ldt $f3, 48(sp)
cfi_remember_state
cfi_restore ($f0)
cfi_restore ($f1)
+ cfi_restore ($f3)
cfi_def_cfa_offset (0)
lda sp, FRAME(sp)
ret $31, (RA), 1
.align 4
stq t4, 8(sp)
- unop
+ excb
ldt $f0, 0(sp)
- unop
+ mt_fpcr $f3
cfi_rel_offset (t4, 8)
cfi_restore ($f0)
ldq t2, 32(sp)
ldq t3, 40(sp)
+ ldt $f3, 48(sp)
lda sp, FRAME(sp)
cfi_remember_state
cfi_restore (t0)
cfi_restore (t2)
cfi_restore (t3)
cfi_restore (t4)
+ cfi_restore ($f3)
cfi_def_cfa_offset (0)
ret $31, (RA), 1
from the divide will be completely wrong. Fortunately, the
quotient must be either 0 or 1, so just compute it directly. */
cmpult Y, X, RV
+ excb
+ mt_fpcr $f3
ldt $f0, 0(sp)
+ ldt $f3, 48(sp)
lda sp, FRAME(sp)
cfi_restore ($f0)
+ cfi_restore ($f3)
cfi_def_cfa_offset (0)
ret $31, (RA), 1
#endif
beq Y, $divbyzero
+ excb
+ mf_fpcr $f10
_ITOFT2 X, $f0, 0, Y, $f1, 8
/* If we get here, we're expecting exact results from the division.
Do nothing else besides convert and clean up. */
cvttq/c $f0, $f0
+ excb
+ mt_fpcr $f10
_FTOIT $f0, $0, 0
$egress:
cvttq/c $f0, $f0
_FTOIT $f0, Q, 8
- .align 3
$fix_sign_in_ret2:
mulq Q, Y, QY
+ excb
+ mt_fpcr $f10
.align 4
subq QY, X, R
be clobbered.
The FPU can handle the division for all input values except zero.
- All we have to do is compute the remainder via multiply-and-subtract. */
+ All we have to do is compute the remainder via multiply-and-subtract.
+
+ The FPCR save/restore is due to the fact that the EV6 _will_ set FPCR_INE
+ for cvttq/c even without /sui being set. It will not, however, properly
+ raise the exception, so we don't have to worry about FPCR_INED being clear
+ and so dying by SIGFPE. */
#ifndef EXTEND
#define EXTEND(S,D) sextl S, D
cfi_def_cfa_offset (FRAME)
CALL_MCOUNT
stt $f0, 0(sp)
- stt $f1, 8(sp)
+ excb
beq Y, DIVBYZERO
+
+ stt $f1, 8(sp)
+ stt $f2, 16(sp)
cfi_rel_offset ($f0, 0)
cfi_rel_offset ($f1, 8)
+ cfi_rel_offset ($f2, 16)
+ mf_fpcr $f2
EXTEND (X, RV)
EXTEND (Y, AT)
- _ITOFT2 RV, $f0, 16, AT, $f1, 24
+ _ITOFT2 RV, $f0, 24, AT, $f1, 32
cvtqt $f0, $f0
cvtqt $f1, $f1
divt/c $f0, $f1, $f0
cvttq/c $f0, $f0
- _FTOIT $f0, RV, 16
+ excb
+ mt_fpcr $f2
+ _FTOIT $f0, RV, 24
ldt $f0, 0(sp)
mull RV, Y, RV
ldt $f1, 8(sp)
+ ldt $f2, 16(sp)
lda sp, FRAME(sp)
cfi_restore ($f0)
cfi_restore ($f1)
+ cfi_restore ($f2)
cfi_def_cfa_offset (0)
subl X, RV, RV
ret $31, (RA), 1
When the dividend is outside the range for which we can compute exact
results, we use the fp quotent as an estimate from which we begin refining
an exact integral value. This reduces the number of iterations in the
- shift-and-subtract loop significantly. */
+ shift-and-subtract loop significantly.
+
+ The FPCR save/restore is due to the fact that the EV6 _will_ set FPCR_INE
+ for cvttq/c even without /sui being set. It will not, however, properly
+ raise the exception, so we don't have to worry about FPCR_INED being clear
+ and so dying by SIGFPE. */
.text
.align 4
ready -- all the time in the world to figure out how we're
going to use the results. */
stt $f0, 0(sp)
- stt $f1, 8(sp)
+ excb
beq Y, DIVBYZERO
+
+ stt $f1, 8(sp)
+ stt $f3, 48(sp)
cfi_rel_offset ($f0, 0)
cfi_rel_offset ($f1, 8)
+ cfi_rel_offset ($f3, 48)
+ mf_fpcr $f3
_ITOFT2 X, $f0, 16, Y, $f1, 24
cvtqt $f0, $f0
/* If we get here, we're expecting exact results from the division.
Do nothing else besides convert, compute remainder, clean up. */
cvttq/c $f0, $f0
+ excb
+ mt_fpcr $f3
_FTOIT $f0, AT, 16
mulq AT, Y, AT
ldt $f0, 0(sp)
+ ldt $f3, 48(sp)
cfi_restore ($f1)
cfi_remember_state
cfi_restore ($f0)
+ cfi_restore ($f3)
cfi_def_cfa_offset (0)
lda sp, FRAME(sp)
subq X, AT, RV
cfi_rel_offset (t3, 0)
mulq Q, Y, QY
- unop
+ excb
stq t4, 8(sp)
- unop
+ mt_fpcr $f3
cfi_rel_offset (t4, 8)
subq QY, X, R
ldq t3, 0(sp)
ldq t4, 8(sp)
ldq t5, 40(sp)
+ ldt $f3, 48(sp)
lda sp, FRAME(sp)
cfi_remember_state
cfi_restore (t0)
cfi_restore (t3)
cfi_restore (t4)
cfi_restore (t5)
+ cfi_restore ($f3)
cfi_def_cfa_offset (0)
ret $31, (RA), 1
When the dividend is outside the range for which we can compute exact
results, we use the fp quotent as an estimate from which we begin refining
an exact integral value. This reduces the number of iterations in the
- shift-and-subtract loop significantly. */
+ shift-and-subtract loop significantly.
+
+ The FPCR save/restore is due to the fact that the EV6 _will_ set FPCR_INE
+ for cvttq/c even without /sui being set. It will not, however, properly
+ raise the exception, so we don't have to worry about FPCR_INED being clear
+ and so dying by SIGFPE. */
.text
.align 4
and Y, AT, AT
stt $f1, 8(sp)
+ excb
+ stt $f3, 48(sp)
beq AT, $powerof2
cfi_rel_offset ($f0, 0)
cfi_rel_offset ($f1, 8)
+ cfi_rel_offset ($f3, 48)
_ITOFT2 X, $f0, 16, Y, $f1, 24
+ mf_fpcr $f3
cvtqt $f0, $f0
cvtqt $f1, $f1
/* If we get here, we're expecting exact results from the division.
Do nothing else besides convert, compute remainder, clean up. */
cvttq/c $f0, $f0
+ excb
+ mt_fpcr $f3
_FTOIT $f0, AT, 16
mulq AT, Y, AT
ldt $f0, 0(sp)
+ ldt $f3, 48(sp)
lda sp, FRAME(sp)
cfi_remember_state
cfi_restore ($f0)
cfi_restore ($f1)
+ cfi_restore ($f3)
cfi_def_cfa_offset (0)
.align 4
.align 4
stq t4, 8(sp)
- unop
+ excb
ldt $f0, 0(sp)
- unop
+ mt_fpcr $f3
cfi_rel_offset (t4, 8)
cfi_restore ($f0)
ldq t2, 32(sp)
ldq t3, 40(sp)
+ ldt $f3, 48(sp)
lda sp, FRAME(sp)
cfi_remember_state
cfi_restore (t0)
cfi_restore (t2)
cfi_restore (t3)
cfi_restore (t4)
+ cfi_restore ($f3)
cfi_def_cfa_offset (0)
ret $31, (RA), 1
projects / thirdparty / glibc.git / commitdiff
