diff options
author | Andy Polyakov <appro@openssl.org> | 2002-12-14 20:42:05 +0000 |
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committer | Andy Polyakov <appro@openssl.org> | 2002-12-14 20:42:05 +0000 |
commit | 2f98abbcb6cfd6ffcf45d5587286f1f849184594 (patch) | |
tree | 890a6915ae4da1afd9ef397b6ead8ac5e8ab37e7 /crypto/bn/asm/x86_64-gcc.c | |
parent | 270fa8aedae8595f9c95a03f019b69cffc31baee (diff) |
x86_64 performance patch.
Diffstat (limited to 'crypto/bn/asm/x86_64-gcc.c')
-rw-r--r-- | crypto/bn/asm/x86_64-gcc.c | 575 |
1 files changed, 575 insertions, 0 deletions
diff --git a/crypto/bn/asm/x86_64-gcc.c b/crypto/bn/asm/x86_64-gcc.c new file mode 100644 index 0000000000..b97b394661 --- /dev/null +++ b/crypto/bn/asm/x86_64-gcc.c @@ -0,0 +1,575 @@ +/* + * x86_64 BIGNUM accelerator version 0.1, December 2002. + * + * Implemented by Andy Polyakov <appro@fy.chalmers.se> for the OpenSSL + * project. + * + * Rights for redistribution and usage in source and binary forms are + * granted according to the OpenSSL license. Warranty of any kind is + * disclaimed. + * + * Q. Version 0.1? It doesn't sound like Andy, he used to assign real + * versions, like 1.0... + * A. Well, that's because this code is basically a quick-n-dirty + * proof-of-concept hack. As you can see it's implemented with + * inline assembler, which means that you're bound to GCC and that + * there must be a room for fine-tuning. + * + * Q. Why inline assembler? + * A. x86_64 features own ABI I'm not familiar with. Which is why + * I decided to let the compiler take care of subroutine + * prologue/epilogue as well as register allocation. + * + * Q. How much faster does it get? + * A. Unfortunately people sitting on x86_64 hardware are prohibited + * to disclose the performance numbers, so they (SuSE labs to be + * specific) wouldn't tell me. However! Very similar coding technique + * (reaching out for 128-bit result from 64x64-bit multiplication) + * results in >3 times performance improvement on MIPS and I see no + * reason why gain on x86_64 would be so much different:-) + */ + +#define BN_ULONG unsigned long + +/* + * "m"(a), "+m"(r) is the way to favor DirectPath µ-code; + * "g"(0) let the compiler to decide where does it + * want to keep the value of zero; + */ +#define mul_add(r,a,word,carry) do { \ + register BN_ULONG high,low; \ + asm ("mulq %3" \ + : "=a"(low),"=d"(high) \ + : "a"(word),"m"(a) \ + : "cc"); \ + asm ("addq %2,%0; adcq %3,%1" \ + : "+r"(carry),"+d"(high)\ + : "a"(low),"g"(0) \ + : "cc"); \ + asm ("addq %2,%0; adcq %3,%1" \ + : "+m"(r),"+d"(high) \ + : "r"(carry),"g"(0) \ + : "cc"); \ + carry=high; \ + } while (0) + +#define mul(r,a,word,carry) do { \ + register BN_ULONG high,low; \ + asm ("mulq %3" \ + : "=a"(low),"=d"(high) \ + : "a"(word),"g"(a) \ + : "cc"); \ + asm ("addq %2,%0; adcq %3,%1" \ + : "+r"(carry),"+d"(high)\ + : "a"(low),"g"(0) \ + : "cc"); \ + (r)=carry, carry=high; \ + } while (0) + +#define sqr(r0,r1,a) \ + asm ("mulq %2" \ + : "=a"(r0),"=d"(r1) \ + : "a"(a) \ + : "cc"); + +BN_ULONG bn_mul_add_words(BN_ULONG *rp, BN_ULONG *ap, int num, BN_ULONG w) + { + BN_ULONG c1=0; + + if (num <= 0) return(c1); + + while (num&~3) + { + mul_add(rp[0],ap[0],w,c1); + mul_add(rp[1],ap[1],w,c1); + mul_add(rp[2],ap[2],w,c1); + mul_add(rp[3],ap[3],w,c1); + ap+=4; rp+=4; num-=4; + } + if (num) + { + mul_add(rp[0],ap[0],w,c1); if (--num==0) return c1; + mul_add(rp[1],ap[1],w,c1); if (--num==0) return c1; + mul_add(rp[2],ap[2],w,c1); return c1; + } + + return(c1); + } + +BN_ULONG bn_mul_words(BN_ULONG *rp, BN_ULONG *ap, int num, BN_ULONG w) + { + BN_ULONG c1=0; + + if (num <= 0) return(c1); + + while (num&~3) + { + mul(rp[0],ap[0],w,c1); + mul(rp[1],ap[1],w,c1); + mul(rp[2],ap[2],w,c1); + mul(rp[3],ap[3],w,c1); + ap+=4; rp+=4; num-=4; + } + if (num) + { + mul(rp[0],ap[0],w,c1); if (--num == 0) return c1; + mul(rp[1],ap[1],w,c1); if (--num == 0) return c1; + mul(rp[2],ap[2],w,c1); + } + return(c1); + } + +void bn_sqr_words(BN_ULONG *r, BN_ULONG *a, int n) + { + if (n <= 0) return; + + while (n&~3) + { + sqr(r[0],r[1],a[0]); + sqr(r[2],r[3],a[1]); + sqr(r[4],r[5],a[2]); + sqr(r[6],r[7],a[3]); + a+=4; r+=8; n-=4; + } + if (n) + { + sqr(r[0],r[1],a[0]); if (--n == 0) return; + sqr(r[2],r[3],a[1]); if (--n == 0) return; + sqr(r[4],r[5],a[2]); + } + } + +BN_ULONG bn_div_words(BN_ULONG h, BN_ULONG l, BN_ULONG d) +{ BN_ULONG ret,waste; + + asm ("divq %3" + : "=a"(ret),"=d"(waste) + : "a"(l),"d"(h),"g"(d) + : "cc"); + + return ret; +} + +BN_ULONG bn_add_words (BN_ULONG *rp, BN_ULONG *ap, BN_ULONG *bp,int n) +{ BN_ULONG ret,i; + + if (n <= 0) return 0; + + asm ( + " subq %2,%2 \n" + ".align 16 \n" + "1: movq (%4,%2,8),%0 \n" + " adcq (%5,%2,8),%0 \n" + " movq %0,(%3,%2,8) \n" + " leaq 1(%2),%2 \n" + " loop 1b \n" + " sbbq %0,%0 \n" + : "+a"(ret),"+c"(n),"+r"(i) + : "r"(rp),"r"(ap),"r"(bp) + : "cc" + ); + + return ret&1; +} + +#ifndef SIMICS +BN_ULONG bn_sub_words (BN_ULONG *rp, BN_ULONG *ap, BN_ULONG *bp,int n) +{ BN_ULONG ret,i; + + if (n <= 0) return 0; + + asm ( + " subq %2,%2 \n" + ".align 16 \n" + "1: movq (%4,%2,8),%0 \n" + " sbbq (%5,%2,8),%0 \n" + " movq %0,(%3,%2,8) \n" + " leaq 1(%2),%2 \n" + " loop 1b \n" + " sbbq %0,%0 \n" + : "+a"(ret),"+c"(n),"+r"(i) + : "r"(rp),"r"(ap),"r"(bp) + : "cc" + ); + + return ret&1; +} +#else +/* Simics 1.4<7 has buggy sbbq:-( */ +#define BN_MASK2 0xffffffffffffffffL +BN_ULONG bn_sub_words(BN_ULONG *r, BN_ULONG *a, BN_ULONG *b, int n) + { + BN_ULONG t1,t2; + int c=0; + + if (n <= 0) return((BN_ULONG)0); + + for (;;) + { + t1=a[0]; t2=b[0]; + r[0]=(t1-t2-c)&BN_MASK2; + if (t1 != t2) c=(t1 < t2); + if (--n <= 0) break; + + t1=a[1]; t2=b[1]; + r[1]=(t1-t2-c)&BN_MASK2; + if (t1 != t2) c=(t1 < t2); + if (--n <= 0) break; + + t1=a[2]; t2=b[2]; + r[2]=(t1-t2-c)&BN_MASK2; + if (t1 != t2) c=(t1 < t2); + if (--n <= 0) break; + + t1=a[3]; t2=b[3]; + r[3]=(t1-t2-c)&BN_MASK2; + if (t1 != t2) c=(t1 < t2); + if (--n <= 0) break; + + a+=4; + b+=4; + r+=4; + } + return(c); + } +#endif + +/* mul_add_c(a,b,c0,c1,c2) -- c+=a*b for three word number c=(c2,c1,c0) */ +/* mul_add_c2(a,b,c0,c1,c2) -- c+=2*a*b for three word number c=(c2,c1,c0) */ +/* sqr_add_c(a,i,c0,c1,c2) -- c+=a[i]^2 for three word number c=(c2,c1,c0) */ +/* sqr_add_c2(a,i,c0,c1,c2) -- c+=2*a[i]*a[j] for three word number c=(c2,c1,c0) */ + +#if 0 +/* original macros are kept for reference purposes */ +#define mul_add_c(a,b,c0,c1,c2) { \ + BN_ULONG ta=(a),tb=(b); \ + t1 = ta * tb; \ + t2 = BN_UMULT_HIGH(ta,tb); \ + c0 += t1; t2 += (c0<t1)?1:0; \ + c1 += t2; c2 += (c1<t2)?1:0; \ + } + +#define mul_add_c2(a,b,c0,c1,c2) { \ + BN_ULONG ta=(a),tb=(b),t0; \ + t1 = BN_UMULT_HIGH(ta,tb); \ + t0 = ta * tb; \ + t2 = t1+t1; c2 += (t2<t1)?1:0; \ + t1 = t0+t0; t2 += (t1<t0)?1:0; \ + c0 += t1; t2 += (c0<t1)?1:0; \ + c1 += t2; c2 += (c1<t2)?1:0; \ + } +#else +#define mul_add_c(a,b,c0,c1,c2) do { \ + asm ("mulq %3" \ + : "=a"(t1),"=d"(t2) \ + : "a"(a),"m"(b) \ + : "cc"); \ + asm ("addq %2,%0; adcq %3,%1" \ + : "+r"(c0),"+d"(t2) \ + : "a"(t1),"g"(0) \ + : "cc"); \ + asm ("addq %2,%0; adcq %3,%1" \ + : "+r"(c1),"+r"(c2) \ + : "d"(t2),"g"(0) \ + : "cc"); \ + } while (0) + +#define sqr_add_c(a,i,c0,c1,c2) do { \ + asm ("mulq %2" \ + : "=a"(t1),"=d"(t2) \ + : "a"(a[i]) \ + : "cc"); \ + asm ("addq %2,%0; adcq %3,%1" \ + : "+r"(c0),"+d"(t2) \ + : "a"(t1),"g"(0) \ + : "cc"); \ + asm ("addq %2,%0; adcq %3,%1" \ + : "+r"(c1),"+r"(c2) \ + : "d"(t2),"g"(0) \ + : "cc"); \ + } while (0) + +#define mul_add_c2(a,b,c0,c1,c2) do { \ + asm ("mulq %3" \ + : "=a"(t1),"=d"(t2) \ + : "a"(a),"m"(b) \ + : "cc"); \ + asm ("addq %0,%0; adcq %2,%1" \ + : "+d"(t2),"+r"(c2) \ + : "g"(0) \ + : "cc"); \ + asm ("addq %0,%0; adcq %2,%1" \ + : "+a"(t1),"+d"(t2) \ + : "g"(0) \ + : "cc"); \ + asm ("addq %2,%0; adcq %3,%1" \ + : "+r"(c0),"+d"(t2) \ + : "a"(t1),"g"(0) \ + : "cc"); \ + asm ("addq %2,%0; adcq %3,%1" \ + : "+r"(c1),"+r"(c2) \ + : "d"(t2),"g"(0) \ + : "cc"); \ + } while (0) +#endif + +#define sqr_add_c2(a,i,j,c0,c1,c2) \ + mul_add_c2((a)[i],(a)[j],c0,c1,c2) + +void bn_mul_comba8(BN_ULONG *r, BN_ULONG *a, BN_ULONG *b) + { + BN_ULONG bl,bh; + BN_ULONG t1,t2; + BN_ULONG c1,c2,c3; + + c1=0; + c2=0; + c3=0; + mul_add_c(a[0],b[0],c1,c2,c3); + r[0]=c1; + c1=0; + mul_add_c(a[0],b[1],c2,c3,c1); + mul_add_c(a[1],b[0],c2,c3,c1); + r[1]=c2; + c2=0; + mul_add_c(a[2],b[0],c3,c1,c2); + mul_add_c(a[1],b[1],c3,c1,c2); + mul_add_c(a[0],b[2],c3,c1,c2); + r[2]=c3; + c3=0; + mul_add_c(a[0],b[3],c1,c2,c3); + mul_add_c(a[1],b[2],c1,c2,c3); + mul_add_c(a[2],b[1],c1,c2,c3); + mul_add_c(a[3],b[0],c1,c2,c3); + r[3]=c1; + c1=0; + mul_add_c(a[4],b[0],c2,c3,c1); + mul_add_c(a[3],b[1],c2,c3,c1); + mul_add_c(a[2],b[2],c2,c3,c1); + mul_add_c(a[1],b[3],c2,c3,c1); + mul_add_c(a[0],b[4],c2,c3,c1); + r[4]=c2; + c2=0; + mul_add_c(a[0],b[5],c3,c1,c2); + mul_add_c(a[1],b[4],c3,c1,c2); + mul_add_c(a[2],b[3],c3,c1,c2); + mul_add_c(a[3],b[2],c3,c1,c2); + mul_add_c(a[4],b[1],c3,c1,c2); + mul_add_c(a[5],b[0],c3,c1,c2); + r[5]=c3; + c3=0; + mul_add_c(a[6],b[0],c1,c2,c3); + mul_add_c(a[5],b[1],c1,c2,c3); + mul_add_c(a[4],b[2],c1,c2,c3); + mul_add_c(a[3],b[3],c1,c2,c3); + mul_add_c(a[2],b[4],c1,c2,c3); + mul_add_c(a[1],b[5],c1,c2,c3); + mul_add_c(a[0],b[6],c1,c2,c3); + r[6]=c1; + c1=0; + mul_add_c(a[0],b[7],c2,c3,c1); + mul_add_c(a[1],b[6],c2,c3,c1); + mul_add_c(a[2],b[5],c2,c3,c1); + mul_add_c(a[3],b[4],c2,c3,c1); + mul_add_c(a[4],b[3],c2,c3,c1); + mul_add_c(a[5],b[2],c2,c3,c1); + mul_add_c(a[6],b[1],c2,c3,c1); + mul_add_c(a[7],b[0],c2,c3,c1); + r[7]=c2; + c2=0; + mul_add_c(a[7],b[1],c3,c1,c2); + mul_add_c(a[6],b[2],c3,c1,c2); + mul_add_c(a[5],b[3],c3,c1,c2); + mul_add_c(a[4],b[4],c3,c1,c2); + mul_add_c(a[3],b[5],c3,c1,c2); + mul_add_c(a[2],b[6],c3,c1,c2); + mul_add_c(a[1],b[7],c3,c1,c2); + r[8]=c3; + c3=0; + mul_add_c(a[2],b[7],c1,c2,c3); + mul_add_c(a[3],b[6],c1,c2,c3); + mul_add_c(a[4],b[5],c1,c2,c3); + mul_add_c(a[5],b[4],c1,c2,c3); + mul_add_c(a[6],b[3],c1,c2,c3); + mul_add_c(a[7],b[2],c1,c2,c3); + r[9]=c1; + c1=0; + mul_add_c(a[7],b[3],c2,c3,c1); + mul_add_c(a[6],b[4],c2,c3,c1); + mul_add_c(a[5],b[5],c2,c3,c1); + mul_add_c(a[4],b[6],c2,c3,c1); + mul_add_c(a[3],b[7],c2,c3,c1); + r[10]=c2; + c2=0; + mul_add_c(a[4],b[7],c3,c1,c2); + mul_add_c(a[5],b[6],c3,c1,c2); + mul_add_c(a[6],b[5],c3,c1,c2); + mul_add_c(a[7],b[4],c3,c1,c2); + r[11]=c3; + c3=0; + mul_add_c(a[7],b[5],c1,c2,c3); + mul_add_c(a[6],b[6],c1,c2,c3); + mul_add_c(a[5],b[7],c1,c2,c3); + r[12]=c1; + c1=0; + mul_add_c(a[6],b[7],c2,c3,c1); + mul_add_c(a[7],b[6],c2,c3,c1); + r[13]=c2; + c2=0; + mul_add_c(a[7],b[7],c3,c1,c2); + r[14]=c3; + r[15]=c1; + } + +void bn_mul_comba4(BN_ULONG *r, BN_ULONG *a, BN_ULONG *b) + { + BN_ULONG bl,bh; + BN_ULONG t1,t2; + BN_ULONG c1,c2,c3; + + c1=0; + c2=0; + c3=0; + mul_add_c(a[0],b[0],c1,c2,c3); + r[0]=c1; + c1=0; + mul_add_c(a[0],b[1],c2,c3,c1); + mul_add_c(a[1],b[0],c2,c3,c1); + r[1]=c2; + c2=0; + mul_add_c(a[2],b[0],c3,c1,c2); + mul_add_c(a[1],b[1],c3,c1,c2); + mul_add_c(a[0],b[2],c3,c1,c2); + r[2]=c3; + c3=0; + mul_add_c(a[0],b[3],c1,c2,c3); + mul_add_c(a[1],b[2],c1,c2,c3); + mul_add_c(a[2],b[1],c1,c2,c3); + mul_add_c(a[3],b[0],c1,c2,c3); + r[3]=c1; + c1=0; + mul_add_c(a[3],b[1],c2,c3,c1); + mul_add_c(a[2],b[2],c2,c3,c1); + mul_add_c(a[1],b[3],c2,c3,c1); + r[4]=c2; + c2=0; + mul_add_c(a[2],b[3],c3,c1,c2); + mul_add_c(a[3],b[2],c3,c1,c2); + r[5]=c3; + c3=0; + mul_add_c(a[3],b[3],c1,c2,c3); + r[6]=c1; + r[7]=c2; + } + +void bn_sqr_comba8(BN_ULONG *r, BN_ULONG *a) + { + BN_ULONG bl,bh; + BN_ULONG t1,t2; + BN_ULONG c1,c2,c3; + + c1=0; + c2=0; + c3=0; + sqr_add_c(a,0,c1,c2,c3); + r[0]=c1; + c1=0; + sqr_add_c2(a,1,0,c2,c3,c1); + r[1]=c2; + c2=0; + sqr_add_c(a,1,c3,c1,c2); + sqr_add_c2(a,2,0,c3,c1,c2); + r[2]=c3; + c3=0; + sqr_add_c2(a,3,0,c1,c2,c3); + sqr_add_c2(a,2,1,c1,c2,c3); + r[3]=c1; + c1=0; + sqr_add_c(a,2,c2,c3,c1); + sqr_add_c2(a,3,1,c2,c3,c1); + sqr_add_c2(a,4,0,c2,c3,c1); + r[4]=c2; + c2=0; + sqr_add_c2(a,5,0,c3,c1,c2); + sqr_add_c2(a,4,1,c3,c1,c2); + sqr_add_c2(a,3,2,c3,c1,c2); + r[5]=c3; + c3=0; + sqr_add_c(a,3,c1,c2,c3); + sqr_add_c2(a,4,2,c1,c2,c3); + sqr_add_c2(a,5,1,c1,c2,c3); + sqr_add_c2(a,6,0,c1,c2,c3); + r[6]=c1; + c1=0; + sqr_add_c2(a,7,0,c2,c3,c1); + sqr_add_c2(a,6,1,c2,c3,c1); + sqr_add_c2(a,5,2,c2,c3,c1); + sqr_add_c2(a,4,3,c2,c3,c1); + r[7]=c2; + c2=0; + sqr_add_c(a,4,c3,c1,c2); + sqr_add_c2(a,5,3,c3,c1,c2); + sqr_add_c2(a,6,2,c3,c1,c2); + sqr_add_c2(a,7,1,c3,c1,c2); + r[8]=c3; + c3=0; + sqr_add_c2(a,7,2,c1,c2,c3); + sqr_add_c2(a,6,3,c1,c2,c3); + sqr_add_c2(a,5,4,c1,c2,c3); + r[9]=c1; + c1=0; + sqr_add_c(a,5,c2,c3,c1); + sqr_add_c2(a,6,4,c2,c3,c1); + sqr_add_c2(a,7,3,c2,c3,c1); + r[10]=c2; + c2=0; + sqr_add_c2(a,7,4,c3,c1,c2); + sqr_add_c2(a,6,5,c3,c1,c2); + r[11]=c3; + c3=0; + sqr_add_c(a,6,c1,c2,c3); + sqr_add_c2(a,7,5,c1,c2,c3); + r[12]=c1; + c1=0; + sqr_add_c2(a,7,6,c2,c3,c1); + r[13]=c2; + c2=0; + sqr_add_c(a,7,c3,c1,c2); + r[14]=c3; + r[15]=c1; + } + +void bn_sqr_comba4(BN_ULONG *r, BN_ULONG *a) + { + BN_ULONG bl,bh; + BN_ULONG t1,t2; + BN_ULONG c1,c2,c3; + + c1=0; + c2=0; + c3=0; + sqr_add_c(a,0,c1,c2,c3); + r[0]=c1; + c1=0; + sqr_add_c2(a,1,0,c2,c3,c1); + r[1]=c2; + c2=0; + sqr_add_c(a,1,c3,c1,c2); + sqr_add_c2(a,2,0,c3,c1,c2); + r[2]=c3; + c3=0; + sqr_add_c2(a,3,0,c1,c2,c3); + sqr_add_c2(a,2,1,c1,c2,c3); + r[3]=c1; + c1=0; + sqr_add_c(a,2,c2,c3,c1); + sqr_add_c2(a,3,1,c2,c3,c1); + r[4]=c2; + c2=0; + sqr_add_c2(a,3,2,c3,c1,c2); + r[5]=c3; + c3=0; + sqr_add_c(a,3,c1,c2,c3); + r[6]=c1; + r[7]=c2; + } |