diff options
Diffstat (limited to 'sysdeps/alpha/divl.S')
| -rw-r--r-- | sysdeps/alpha/divl.S | 22 |
1 files changed, 18 insertions, 4 deletions
diff --git a/sysdeps/alpha/divl.S b/sysdeps/alpha/divl.S index 90cd6862a7..408d66db00 100644 --- a/sysdeps/alpha/divl.S +++ b/sysdeps/alpha/divl.S @@ -22,7 +22,12 @@ 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 @@ -41,25 +46,34 @@ __divl: 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 |