diff options
Diffstat (limited to 'sysdeps/alpha/remqu.S')
| -rw-r--r-- | sysdeps/alpha/remqu.S | 21 |
1 files changed, 18 insertions, 3 deletions
diff --git a/sysdeps/alpha/remqu.S b/sysdeps/alpha/remqu.S index f8deebbbc1..bfa78dff57 100644 --- a/sysdeps/alpha/remqu.S +++ b/sysdeps/alpha/remqu.S @@ -33,7 +33,12 @@ 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 @@ -57,11 +62,15 @@ __remqu: 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 @@ -79,14 +88,18 @@ __remqu: /* 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 @@ -144,9 +157,9 @@ $x_big: .align 4 stq t4, 8(sp) - unop + excb ldt $f0, 0(sp) - unop + mt_fpcr $f3 cfi_rel_offset (t4, 8) cfi_restore ($f0) @@ -168,6 +181,7 @@ $q_low_ret: ldq t2, 32(sp) ldq t3, 40(sp) + ldt $f3, 48(sp) lda sp, FRAME(sp) cfi_remember_state cfi_restore (t0) @@ -175,6 +189,7 @@ $q_low_ret: cfi_restore (t2) cfi_restore (t3) cfi_restore (t4) + cfi_restore ($f3) cfi_def_cfa_offset (0) ret $31, (RA), 1 |