Loading crypto/bn/asm/bn-c64xplus.asm +3 −2 Original line number Diff line number Diff line Loading @@ -284,8 +284,9 @@ _bn_mul_comba4: .if 0 BNOP sploopNxM?,3 ;; Above mentioned m*2*(n+1)+10 does not apply in n=m=4 case, ;; because of read-after-write penalties, it's rather ;; n*2*(n+3)+10, or 66 cycles [plus various overheads]... ;; because of low-counter effect, when prologue phase finishes ;; before SPKERNEL instruction is reached. As result it's 25% ;; slower than expected... MVK 4,B0 ; N, RILC || MVK 4,A0 ; M, outer loop counter || MV ARG1,A5 ; copy ap Loading Loading
crypto/bn/asm/bn-c64xplus.asm +3 −2 Original line number Diff line number Diff line Loading @@ -284,8 +284,9 @@ _bn_mul_comba4: .if 0 BNOP sploopNxM?,3 ;; Above mentioned m*2*(n+1)+10 does not apply in n=m=4 case, ;; because of read-after-write penalties, it's rather ;; n*2*(n+3)+10, or 66 cycles [plus various overheads]... ;; because of low-counter effect, when prologue phase finishes ;; before SPKERNEL instruction is reached. As result it's 25% ;; slower than expected... MVK 4,B0 ; N, RILC || MVK 4,A0 ; M, outer loop counter || MV ARG1,A5 ; copy ap Loading
Rich Salz <rsalz@openssl.org>Rich Salz <rsalz@openssl.org>