libbb/sha1: shrink unrolled x86-64 code
function old new delta sha1_process_block64 3482 3481 -1 .rodata 108460 108412 -48 ------------------------------------------------------------------------------ (add/remove: 1/4 grow/shrink: 0/2 up/down: 0/-49) Total: -49 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
parent
c193cbd6df
commit
4923f74e58
@ -24,6 +24,7 @@ sha1_process_block64:
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# xmm0..xmm3: W[]
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# xmm4,xmm5: temps
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# xmm6: current round constant
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# xmm7: all round constants
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# -64(%rsp): area for passing RCONST + W[] from vector to integer units
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movl 80(%rdi), %eax # a = ctx->hash[0]
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@ -32,16 +33,17 @@ sha1_process_block64:
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movl 92(%rdi), %edx # d = ctx->hash[3]
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movl 96(%rdi), %ebp # e = ctx->hash[4]
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movaps rconst0x5A827999(%rip), %xmm6
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movaps sha1const(%rip), %xmm7
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pshufd $0x00, %xmm7, %xmm6
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# Load W[] to xmm registers, byteswapping on the fly.
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#
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# For iterations 0..15, we pass W[] in rsi,r8..r14
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# for use in RD1A's instead of spilling them to stack.
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# for use in RD1As instead of spilling them to stack.
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# We lose parallelized addition of RCONST, but LEA
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# can do two additions at once, so it's probably a wash.
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# can do two additions at once, so it is probably a wash.
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# (We use rsi instead of rN because this makes two
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# LEAs in two first RD1A's shorter by one byte).
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# LEAs in two first RD1As shorter by one byte).
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movq 4*0(%rdi), %rsi
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movq 4*2(%rdi), %r8
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bswapq %rsi
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@ -253,7 +255,7 @@ sha1_process_block64:
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roll $5, %edi # rotl32(a,5)
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addl %edi, %edx # e += rotl32(a,5)
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rorl $2, %eax # b = rotl32(b,30)
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movaps rconst0x6ED9EBA1(%rip), %xmm6
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pshufd $0x55, %xmm7, %xmm6
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# PREP %xmm1 %xmm2 %xmm3 %xmm0 -64+16*1(%rsp)
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movaps %xmm0, %xmm4
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psrldq $4, %xmm4 # rshift by 4 bytes: T1 = ([13],[14],[15],0)
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@ -614,7 +616,7 @@ sha1_process_block64:
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roll $5, %esi # rotl32(a,5)
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addl %esi, %edx # e += rotl32(a,5)
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rorl $2, %eax # b = rotl32(b,30)
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movaps rconst0x8F1BBCDC(%rip), %xmm6
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pshufd $0xaa, %xmm7, %xmm6
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# PREP %xmm2 %xmm3 %xmm0 %xmm1 -64+16*2(%rsp)
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movaps %xmm1, %xmm4
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psrldq $4, %xmm4 # rshift by 4 bytes: T1 = ([13],[14],[15],0)
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@ -1001,7 +1003,7 @@ sha1_process_block64:
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roll $5, %esi # rotl32(a,5)
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addl %esi, %edx # e += rotl32(a,5)
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rorl $2, %eax # b = rotl32(b,30)
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movaps rconst0xCA62C1D6(%rip), %xmm6
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pshufd $0xff, %xmm7, %xmm6
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# PREP %xmm3 %xmm0 %xmm1 %xmm2 -64+16*3(%rsp)
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movaps %xmm2, %xmm4
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psrldq $4, %xmm4 # rshift by 4 bytes: T1 = ([13],[14],[15],0)
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@ -1475,25 +1477,10 @@ sha1_process_block64:
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.section .rodata.cst16.sha1const, "aM", @progbits, 16
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.balign 16
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rconst0x5A827999:
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sha1const:
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.long 0x5A827999
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.long 0x5A827999
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.long 0x5A827999
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.long 0x5A827999
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rconst0x6ED9EBA1:
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.long 0x6ED9EBA1
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.long 0x6ED9EBA1
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.long 0x6ED9EBA1
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.long 0x6ED9EBA1
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rconst0x8F1BBCDC:
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.long 0x8F1BBCDC
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.long 0x8F1BBCDC
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.long 0x8F1BBCDC
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.long 0x8F1BBCDC
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rconst0xCA62C1D6:
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.long 0xCA62C1D6
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.long 0xCA62C1D6
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.long 0xCA62C1D6
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.long 0xCA62C1D6
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#endif
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@ -34,6 +34,7 @@ exec >hash_md5_sha_x86-64.S
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xmmT1="%xmm4"
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xmmT2="%xmm5"
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xmmRCONST="%xmm6"
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xmmALLRCONST="%xmm7"
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T=`printf '\t'`
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# SSE instructions are longer than 4 bytes on average.
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@ -125,6 +126,7 @@ sha1_process_block64:
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# xmm0..xmm3: W[]
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# xmm4,xmm5: temps
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# xmm6: current round constant
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# xmm7: all round constants
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# -64(%rsp): area for passing RCONST + W[] from vector to integer units
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movl 80(%rdi), %eax # a = ctx->hash[0]
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@ -133,16 +135,17 @@ sha1_process_block64:
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movl 92(%rdi), %edx # d = ctx->hash[3]
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movl 96(%rdi), %ebp # e = ctx->hash[4]
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movaps rconst0x5A827999(%rip), $xmmRCONST
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movaps sha1const(%rip), $xmmALLRCONST
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pshufd \$0x00, $xmmALLRCONST, $xmmRCONST
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# Load W[] to xmm registers, byteswapping on the fly.
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#
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# For iterations 0..15, we pass W[] in rsi,r8..r14
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# for use in RD1A's instead of spilling them to stack.
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# for use in RD1As instead of spilling them to stack.
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# We lose parallelized addition of RCONST, but LEA
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# can do two additions at once, so it's probably a wash.
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# can do two additions at once, so it is probably a wash.
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# (We use rsi instead of rN because this makes two
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# LEAs in two first RD1A's shorter by one byte).
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# LEAs in two first RD1As shorter by one byte).
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movq 4*0(%rdi), %rsi
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movq 4*2(%rdi), %r8
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bswapq %rsi
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@ -359,7 +362,7 @@ RD1A bx cx dx bp ax 4; RD1A ax bx cx dx bp 5; RD1A bp ax bx cx dx 6; RD1A dx
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a=`PREP %xmm0 %xmm1 %xmm2 %xmm3 "-64+16*0(%rsp)"`
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b=`RD1A cx dx bp ax bx 8; RD1A bx cx dx bp ax 9; RD1A ax bx cx dx bp 10; RD1A bp ax bx cx dx 11;`
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INTERLEAVE "$a" "$b"
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a=`echo " movaps rconst0x6ED9EBA1(%rip), $xmmRCONST"
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a=`echo " pshufd \\$0x55, $xmmALLRCONST, $xmmRCONST"
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PREP %xmm1 %xmm2 %xmm3 %xmm0 "-64+16*1(%rsp)"`
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b=`RD1A dx bp ax bx cx 12; RD1A cx dx bp ax bx 13; RD1A bx cx dx bp ax 14; RD1A ax bx cx dx bp 15;`
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INTERLEAVE "$a" "$b"
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@ -378,7 +381,7 @@ INTERLEAVE "$a" "$b"
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a=`PREP %xmm1 %xmm2 %xmm3 %xmm0 "-64+16*1(%rsp)"`
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b=`RD2 cx dx bp ax bx 28; RD2 bx cx dx bp ax 29; RD2 ax bx cx dx bp 30; RD2 bp ax bx cx dx 31;`
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INTERLEAVE "$a" "$b"
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a=`echo " movaps rconst0x8F1BBCDC(%rip), $xmmRCONST"
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a=`echo " pshufd \\$0xaa, $xmmALLRCONST, $xmmRCONST"
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PREP %xmm2 %xmm3 %xmm0 %xmm1 "-64+16*2(%rsp)"`
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b=`RD2 dx bp ax bx cx 32; RD2 cx dx bp ax bx 33; RD2 bx cx dx bp ax 34; RD2 ax bx cx dx bp 35;`
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INTERLEAVE "$a" "$b"
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@ -397,7 +400,7 @@ INTERLEAVE "$a" "$b"
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a=`PREP %xmm2 %xmm3 %xmm0 %xmm1 "-64+16*2(%rsp)"`
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b=`RD3 cx dx bp ax bx 48; RD3 bx cx dx bp ax 49; RD3 ax bx cx dx bp 50; RD3 bp ax bx cx dx 51;`
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INTERLEAVE "$a" "$b"
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a=`echo " movaps rconst0xCA62C1D6(%rip), $xmmRCONST"
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a=`echo " pshufd \\$0xff, $xmmALLRCONST, $xmmRCONST"
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PREP %xmm3 %xmm0 %xmm1 %xmm2 "-64+16*3(%rsp)"`
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b=`RD3 dx bp ax bx cx 52; RD3 cx dx bp ax bx 53; RD3 bx cx dx bp ax 54; RD3 ax bx cx dx bp 55;`
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INTERLEAVE "$a" "$b"
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@ -439,25 +442,10 @@ echo "
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.section .rodata.cst16.sha1const, \"aM\", @progbits, 16
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.balign 16
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rconst0x5A827999:
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sha1const:
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.long 0x5A827999
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.long 0x5A827999
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.long 0x5A827999
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.long 0x5A827999
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rconst0x6ED9EBA1:
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.long 0x6ED9EBA1
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.long 0x6ED9EBA1
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.long 0x6ED9EBA1
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.long 0x6ED9EBA1
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rconst0x8F1BBCDC:
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.long 0x8F1BBCDC
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.long 0x8F1BBCDC
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.long 0x8F1BBCDC
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.long 0x8F1BBCDC
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rconst0xCA62C1D6:
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.long 0xCA62C1D6
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.long 0xCA62C1D6
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.long 0xCA62C1D6
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.long 0xCA62C1D6
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#endif"
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