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| author | marius <marius@FreeBSD.org> | 2008-11-16 19:28:55 +0000 |
|---|---|---|
| committer | marius <marius@FreeBSD.org> | 2008-11-16 19:28:55 +0000 |
| commit | ed798111a5efa5c50eccfacde74756b43d858128 (patch) | |
| tree | 2fa192ea81750a86a8fa5c6ecc964042d89cd84a /sys/sparc64 | |
| parent | 39fb5ed1d3fd48f48e6c2a161f9058e1cde867a7 (diff) | |
| download | FreeBSD-src-ed798111a5efa5c50eccfacde74756b43d858128.zip FreeBSD-src-ed798111a5efa5c50eccfacde74756b43d858128.tar.gz | |
Micro-optimize spitfire_block_{copy,zero}():
- Predict the loop as taken as it's more likely that there's still
data to copy and memory to zero respectively.
- Don't waste the delay slot.
Diffstat (limited to 'sys/sparc64')
| -rw-r--r-- | sys/sparc64/sparc64/support.S | 13 |
1 files changed, 4 insertions, 9 deletions
diff --git a/sys/sparc64/sparc64/support.S b/sys/sparc64/sparc64/support.S index 5013dc6..a3f6501 100644 --- a/sys/sparc64/sparc64/support.S +++ b/sys/sparc64/sparc64/support.S @@ -647,7 +647,7 @@ ENTRY(spitfire_block_copy) stda %f32, [%o1] %asi add %o0, 64, %o0 sub %o2, 64, %o2 - ba %xcc, 2b + ba,pt %xcc, 2b add %o1, 64, %o1 3: membar #Sync @@ -655,10 +655,8 @@ ENTRY(spitfire_block_copy) stda %f16, [%o1] %asi membar #Sync - wr %g0, 0, %fprs - retl - nop + wr %g0, 0, %fprs END(spitfire_block_copy) /* @@ -704,14 +702,12 @@ ENTRY(spitfire_block_zero) stda %f0, [%o0 + 128] %asi stda %f0, [%o0 + 192] %asi sub %o1, 256, %o1 - brnz %o1, 1b + brnz,pt %o1, 1b add %o0, 256, %o0 membar #Sync - wr %g0, 0, %fprs - retl - nop + wr %g0, 0, %fprs END(spitfire_block_zero) .globl fpu_fault_end @@ -806,7 +802,6 @@ ENTRY(bintr) ENTRY(eintr) nop - /* * XXX including sys/gmon.h in genassym.c is not possible due to uintfptr_t * badness. |
