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 */
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