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| author | Torbjorn Granlund <tg@gmplib.org> | 2021-11-14 11:53:02 +0100 |
|---|---|---|
| committer | Torbjorn Granlund <tg@gmplib.org> | 2021-11-14 11:53:02 +0100 |
| commit | 798fa2a7893ee32e047e3fc265effda43f77c71c (patch) | |
| tree | e7944c0bc3a442e971b449726c54bd5fd30bcc39 /mpn | |
| parent | 486471055d6e6997ecf270722b2d637a5e426896 (diff) | |
| download | gmp-798fa2a7893ee32e047e3fc265effda43f77c71c.tar.gz | |
Optimise out annulled shift insn in loop.
Diffstat (limited to 'mpn')
| -rw-r--r-- | mpn/sparc64/gcd_11.asm | 17 |
1 files changed, 8 insertions, 9 deletions
diff --git a/mpn/sparc64/gcd_11.asm b/mpn/sparc64/gcd_11.asm index 5564751f0..2dd200d92 100644 --- a/mpn/sparc64/gcd_11.asm +++ b/mpn/sparc64/gcd_11.asm @@ -3,7 +3,8 @@ dnl SPARC64 mpn_gcd_11. dnl Based on the K7 gcd_1.asm, by Kevin Ryde. Rehacked for SPARC by Torbjörn dnl Granlund. -dnl Copyright 2000-2002, 2005, 2009, 2011-2013 Free Software Foundation, Inc. +dnl Copyright 2000-2002, 2005, 2009, 2011-2013, 2021 Free Software Foundation, +dnl Inc. dnl This file is part of the GNU MP Library. dnl @@ -60,8 +61,6 @@ define(`u0', `%o0') define(`v0', `%o1') ASM_START() - REGISTER(%g2,#scratch) - REGISTER(%g3,#scratch) PROLOGUE(mpn_gcd_11) LEA64(ctz_table, o5, g4) b L(odd) @@ -70,19 +69,19 @@ PROLOGUE(mpn_gcd_11) ALIGN(16) L(top): movcc %xcc, %o4, v0 C v = min(u,v) movcc %xcc, %o2, %o0 C u = |v - u] -L(mid): ldub [%o5+%g3], %g5 C - brz,a,pn %g3, L(shift_alot) C - srlx %o0, MAXSHIFT, %o0 - srlx %o0, %g5, %o4 C new u, odd +L(mid): ldub [%o5+%g1], %g5 C + brz,pn %g1, L(shift_alot) C + srlx %o0, %g5, %o4 C new u, odd L(odd): subcc v0, %o4, %o2 C v - u, set flags for branch and movcc sub %o4, v0, %o0 C u - v bnz,pt %xcc, L(top) C - and %o2, MASK, %g3 C extract low MAXSHIFT bits from (v-u) + and %o2, MASK, %g1 C extract low MAXSHIFT bits from (v-u) retl mov v0, %o0 L(shift_alot): + mov %o4, %o0 b L(mid) - and %o0, MASK, %g3 C + and %o4, MASK, %g1 C EPILOGUE() |