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authorRichard Henderson <rth@redhat.com>2004-09-06 02:01:35 +0000
committerRichard Henderson <rth@redhat.com>2004-09-06 02:01:35 +0000
commitfebcd83655138bcb01b2680e170e6773a1ec813c (patch)
tree28ede43c995a57e82b29bd5fc3fef7112d5a4c20 /sysdeps/alpha/reml.S
parent42d86dd6c0a12373cb1d10b49f7ad2fb6488d364 (diff)
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* 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 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.
Diffstat (limited to 'sysdeps/alpha/reml.S')
-rw-r--r--sysdeps/alpha/reml.S22
1 files changed, 18 insertions, 4 deletions
diff --git a/sysdeps/alpha/reml.S b/sysdeps/alpha/reml.S
index 1bbb978..bfc3be5 100644
--- a/sysdeps/alpha/reml.S
+++ b/sysdeps/alpha/reml.S
@@ -24,7 +24,12 @@
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
@@ -43,26 +48,35 @@ __reml:
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