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sparc32: get rid of range exception table entries in checksum_32.S
trivial - we don't even look at instruction offsets in the handler Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
parent
df06c27ebd
commit
cfd5fa7021
1 changed files with 27 additions and 37 deletions
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@ -155,13 +155,6 @@ cpout: retl ! get outta here
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.text; \
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.align 4
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#define EXT(start,end) \
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.section __ex_table,ALLOC; \
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.align 4; \
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.word start, 0, end, cc_fault; \
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.text; \
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.align 4
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/* This aligned version executes typically in 8.5 superscalar cycles, this
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* is the best I can do. I say 8.5 because the final add will pair with
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* the next ldd in the main unrolled loop. Thus the pipe is always full.
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@ -169,20 +162,20 @@ cpout: retl ! get outta here
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* please check the fixup code below as well.
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*/
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#define CSUMCOPY_BIGCHUNK_ALIGNED(src, dst, sum, off, t0, t1, t2, t3, t4, t5, t6, t7) \
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ldd [src + off + 0x00], t0; \
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ldd [src + off + 0x08], t2; \
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EX(ldd [src + off + 0x00], t0); \
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EX(ldd [src + off + 0x08], t2); \
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addxcc t0, sum, sum; \
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ldd [src + off + 0x10], t4; \
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EX(ldd [src + off + 0x10], t4); \
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addxcc t1, sum, sum; \
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ldd [src + off + 0x18], t6; \
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EX(ldd [src + off + 0x18], t6); \
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addxcc t2, sum, sum; \
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std t0, [dst + off + 0x00]; \
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EX(std t0, [dst + off + 0x00]); \
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addxcc t3, sum, sum; \
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std t2, [dst + off + 0x08]; \
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EX(std t2, [dst + off + 0x08]); \
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addxcc t4, sum, sum; \
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std t4, [dst + off + 0x10]; \
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EX(std t4, [dst + off + 0x10]); \
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addxcc t5, sum, sum; \
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std t6, [dst + off + 0x18]; \
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EX(std t6, [dst + off + 0x18]); \
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addxcc t6, sum, sum; \
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addxcc t7, sum, sum;
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@ -191,39 +184,39 @@ cpout: retl ! get outta here
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* Viking MXCC into streaming mode. Ho hum...
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*/
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#define CSUMCOPY_BIGCHUNK(src, dst, sum, off, t0, t1, t2, t3, t4, t5, t6, t7) \
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ldd [src + off + 0x00], t0; \
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ldd [src + off + 0x08], t2; \
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ldd [src + off + 0x10], t4; \
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ldd [src + off + 0x18], t6; \
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st t0, [dst + off + 0x00]; \
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EX(ldd [src + off + 0x00], t0); \
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EX(ldd [src + off + 0x08], t2); \
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EX(ldd [src + off + 0x10], t4); \
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EX(ldd [src + off + 0x18], t6); \
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EX(st t0, [dst + off + 0x00]); \
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addxcc t0, sum, sum; \
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st t1, [dst + off + 0x04]; \
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EX(st t1, [dst + off + 0x04]); \
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addxcc t1, sum, sum; \
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st t2, [dst + off + 0x08]; \
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EX(st t2, [dst + off + 0x08]); \
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addxcc t2, sum, sum; \
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st t3, [dst + off + 0x0c]; \
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EX(st t3, [dst + off + 0x0c]); \
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addxcc t3, sum, sum; \
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st t4, [dst + off + 0x10]; \
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EX(st t4, [dst + off + 0x10]); \
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addxcc t4, sum, sum; \
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st t5, [dst + off + 0x14]; \
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EX(st t5, [dst + off + 0x14]); \
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addxcc t5, sum, sum; \
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st t6, [dst + off + 0x18]; \
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EX(st t6, [dst + off + 0x18]); \
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addxcc t6, sum, sum; \
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st t7, [dst + off + 0x1c]; \
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EX(st t7, [dst + off + 0x1c]); \
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addxcc t7, sum, sum;
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/* Yuck, 6 superscalar cycles... */
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#define CSUMCOPY_LASTCHUNK(src, dst, sum, off, t0, t1, t2, t3) \
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ldd [src - off - 0x08], t0; \
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ldd [src - off - 0x00], t2; \
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EX(ldd [src - off - 0x08], t0); \
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EX(ldd [src - off - 0x00], t2); \
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addxcc t0, sum, sum; \
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st t0, [dst - off - 0x08]; \
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EX(st t0, [dst - off - 0x08]); \
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addxcc t1, sum, sum; \
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st t1, [dst - off - 0x04]; \
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EX(st t1, [dst - off - 0x04]); \
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addxcc t2, sum, sum; \
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st t2, [dst - off - 0x00]; \
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EX(st t2, [dst - off - 0x00]); \
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addxcc t3, sum, sum; \
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st t3, [dst - off + 0x04];
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EX(st t3, [dst - off + 0x04]);
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/* Handle the end cruft code out of band for better cache patterns. */
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cc_end_cruft:
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@ -331,7 +324,6 @@ __csum_partial_copy_sparc_generic:
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CSUMCOPY_BIGCHUNK(%o0,%o1,%g7,0x20,%o4,%o5,%g2,%g3,%g4,%g5,%o2,%o3)
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CSUMCOPY_BIGCHUNK(%o0,%o1,%g7,0x40,%o4,%o5,%g2,%g3,%g4,%g5,%o2,%o3)
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CSUMCOPY_BIGCHUNK(%o0,%o1,%g7,0x60,%o4,%o5,%g2,%g3,%g4,%g5,%o2,%o3)
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10: EXT(5b, 10b) ! note for exception handling
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sub %g1, 128, %g1 ! detract from length
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addx %g0, %g7, %g7 ! add in last carry bit
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andcc %g1, 0xffffff80, %g0 ! more to csum?
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@ -356,8 +348,7 @@ cctbl: CSUMCOPY_LASTCHUNK(%o0,%o1,%g7,0x68,%g2,%g3,%g4,%g5)
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CSUMCOPY_LASTCHUNK(%o0,%o1,%g7,0x28,%g2,%g3,%g4,%g5)
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CSUMCOPY_LASTCHUNK(%o0,%o1,%g7,0x18,%g2,%g3,%g4,%g5)
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CSUMCOPY_LASTCHUNK(%o0,%o1,%g7,0x08,%g2,%g3,%g4,%g5)
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12: EXT(cctbl, 12b) ! note for exception table handling
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addx %g0, %g7, %g7
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12: addx %g0, %g7, %g7
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andcc %o3, 0xf, %g0 ! check for low bits set
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ccte: bne cc_end_cruft ! something left, handle it out of band
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andcc %o3, 8, %g0 ! begin checks for that code
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@ -367,7 +358,6 @@ ccdbl: CSUMCOPY_BIGCHUNK_ALIGNED(%o0,%o1,%g7,0x00,%o4,%o5,%g2,%g3,%g4,%g5,%o2,%o
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CSUMCOPY_BIGCHUNK_ALIGNED(%o0,%o1,%g7,0x20,%o4,%o5,%g2,%g3,%g4,%g5,%o2,%o3)
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CSUMCOPY_BIGCHUNK_ALIGNED(%o0,%o1,%g7,0x40,%o4,%o5,%g2,%g3,%g4,%g5,%o2,%o3)
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CSUMCOPY_BIGCHUNK_ALIGNED(%o0,%o1,%g7,0x60,%o4,%o5,%g2,%g3,%g4,%g5,%o2,%o3)
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11: EXT(ccdbl, 11b) ! note for exception table handling
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sub %g1, 128, %g1 ! detract from length
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addx %g0, %g7, %g7 ! add in last carry bit
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andcc %g1, 0xffffff80, %g0 ! more to csum?
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