Author: kp Date: Wed Jul 1 19:12:47 2020 New Revision: 362852 URL: https://svnweb.freebsd.org/changeset/base/362852
Log: riscv locore.S: load constant prior to loop A very minor micro-optimization; t0 is not clobbered between the loop top and bottom and there appear to be no other branches to this label. Submitted by: Nathaniel Filardo <nw...@cl.cam.ac.uk> Reviewed by: mhorne Differential Revision: https://reviews.freebsd.org/D25524 Modified: head/sys/riscv/riscv/locore.S Modified: head/sys/riscv/riscv/locore.S ============================================================================== --- head/sys/riscv/riscv/locore.S Wed Jul 1 19:11:02 2020 (r362851) +++ head/sys/riscv/riscv/locore.S Wed Jul 1 19:12:47 2020 (r362852) @@ -139,8 +139,8 @@ pagetables: li t2, 512 /* Build 512 entries */ add t3, t4, t2 li t5, 0 -1: li t0, (PTE_KERN | PTE_X) +1: slli t2, t4, PTE_PPN1_S /* << PTE_PPN1_S */ or t5, t0, t2 sd t5, (s1) /* Store PTE entry to position */ _______________________________________________ svn-src-all@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
