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| author | Uros Bizjak <ubizjak@gmail.com> | 2019-04-01 15:58:37 +0700 |
|---|---|---|
| committer | Richard Henderson <richard.henderson@linaro.org> | 2019-04-01 16:00:37 +0700 |
| commit | 993e3107af67edefcfc79a62ae55f7b98aa5151e (patch) | |
| tree | 449aa8a58d1397aeb3d39b7fb106f0821ef1ef85 | |
| parent | d5ecee822e72a2fd156338ab2be2f2e70a1da55a (diff) | |
| download | glibc-993e3107af67edefcfc79a62ae55f7b98aa5151e.tar.gz glibc-993e3107af67edefcfc79a62ae55f7b98aa5151e.tar.xz glibc-993e3107af67edefcfc79a62ae55f7b98aa5151e.zip | |
alpha: Improve sysdeps/alpha/divqu.S and sysdeps/alpha/remqu.S
* sysdeps/alpha/divqu.S (__divqu): Move save of $f0 and excb after conditional branch to DIVBYZERO. Fix unwind info. * sysdeps/alpha/remqu.S (__remqu): Move saves of $f0, $f1, $f2 and excb after conditional branch to $powerof2. Add missing unop instructions and .align directives and reorder instructions to match __divqu. Signed-off-by: Uroš Bizjak <ubizjak@gmail.com>
| -rw-r--r-- | ChangeLog | 9 | ||||
| -rw-r--r-- | sysdeps/alpha/divqu.S | 7 | ||||
| -rw-r--r-- | sysdeps/alpha/remqu.S | 12 |
3 files changed, 20 insertions, 8 deletions
diff --git a/ChangeLog b/ChangeLog index 54b90015ad..a514308225 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,12 @@ +2019-04-01 Uros Bizjak <ubizjak@gmail.com> + + * sysdeps/alpha/divqu.S (__divqu): Move save of $f0 and excb after + conditional branch to DIVBYZERO. Fix unwind info. + * sysdeps/alpha/remqu.S (__remqu): Move saves of $f0, $f1, $f2 and + excb after conditional branch to $powerof2. Add missing unop + instructions and .align directives and reorder instructions to + match __divqu. + 2019-04-01 Richard Henderson <rth@twiddle.net> * sysdeps/unix/sysv/linux/alpha/kernel-features.h (__NR_shmat): diff --git a/sysdeps/alpha/divqu.S b/sysdeps/alpha/divqu.S index f5cedd0716..3165374b6d 100644 --- a/sysdeps/alpha/divqu.S +++ b/sysdeps/alpha/divqu.S @@ -56,10 +56,10 @@ __divqu: that's done, we have at least 22 cycles until its results are ready -- all the time in the world to figure out how we're going to use the results. */ - stt $f0, 0(sp) - excb beq Y, DIVBYZERO + stt $f0, 0(sp) + excb stt $f1, 8(sp) stt $f3, 48(sp) cfi_rel_offset ($f0, 0) @@ -70,6 +70,7 @@ __divqu: _ITOFT2 X, $f0, 16, Y, $f1, 24 cvtqt $f0, $f0 cvtqt $f1, $f1 + blt X, $x_is_neg divt/c $f0, $f1, $f0 @@ -90,12 +91,12 @@ __divqu: 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) - lda sp, FRAME(sp) ret $31, (RA), 1 .align 4 diff --git a/sysdeps/alpha/remqu.S b/sysdeps/alpha/remqu.S index a240ee9735..3b6a62dd88 100644 --- a/sysdeps/alpha/remqu.S +++ b/sysdeps/alpha/remqu.S @@ -57,19 +57,19 @@ __remqu: ready -- all the time in the world to figure out how we're going to use the results. */ subq Y, 1, AT - stt $f0, 0(sp) and Y, AT, AT + beq AT, $powerof2 - stt $f1, 8(sp) + stt $f0, 0(sp) excb + stt $f1, 8(sp) stt $f3, 48(sp) - beq AT, $powerof2 cfi_rel_offset ($f0, 0) cfi_rel_offset ($f1, 8) cfi_rel_offset ($f3, 48) + mf_fpcr $f3 _ITOFT2 X, $f0, 16, Y, $f1, 24 - mf_fpcr $f3 cvtqt $f0, $f0 cvtqt $f1, $f1 @@ -116,11 +116,13 @@ $x_is_neg: cfi_rel_offset ($f2, 24) _ITOFS AT, $f2, 16 + .align 4 addt $f0, $f2, $f0 + unop divt/c $f0, $f1, $f0 + unop /* Ok, we've now the divide issued. Continue with other checks. */ - .align 4 ldt $f1, 8(sp) unop ldt $f2, 24(sp) |