The bcopy_page() and bzero_page() functions now call mcount() if
GPROF and PROFILE_ASM are defined. Register usage has been changed to avoid using r11. This means we have one less register to save during this function.
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@ -1,4 +1,4 @@
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/* $NetBSD: bcopy_page.S,v 1.2 1996/06/03 21:21:31 mark Exp $ */
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/* $NetBSD: bcopy_page.S,v 1.3 1996/10/15 01:52:01 mark Exp $ */
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/*
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/*
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* Copyright (c) 1995 Scott Stevens
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* Copyright (c) 1995 Scott Stevens
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@ -38,79 +38,103 @@
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* Created : 08/04/95
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* Created : 08/04/95
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*/
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*/
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ip .req r12
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sp .req r13
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lr .req r14
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pc .req r15
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#include <machine/param.h>
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#include <machine/param.h>
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/* TODO:
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/*
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* bcopy_page(src, dest)
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*
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*
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* Use r2 as the counter so that r3-r10 can be used instead of r4-r11
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* Optimised copy page routine.
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* This means r11 will not need to be pushed on the stack.
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*
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*/
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* On entry:
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* r0 - src address
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/* bcopy_page(src, dest)
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* r1 - dest address
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* r0 - src
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*
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* r1 - dest
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* Requires:
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* number of bytes (NBPG) is a multiple of 512
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* number of bytes per page (NBPG) is a multiple of 512
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*/
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*/
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.global _bcopy_page
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.global _bcopy_page
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_bcopy_page:
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_bcopy_page:
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mov r3, #(NBPG >> 9)
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stmfd sp!, {r4-r10, lr}
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STMFD r13!, {r4-r11, r14}
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#if defined(GPROF) && defined(PROFILE_ASM)
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mov ip, lr
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bl mcount
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#endif
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mov r2, #(NBPG >> 9)
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loopcopy:
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loopcopy:
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ldmia r0!, {r4-r11}
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ldmia r0!, {r3-r10}
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stmia r1!, {r4-r11}
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stmia r1!, {r3-r10}
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ldmia r0!, {r4-r11}
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ldmia r0!, {r3-r10}
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stmia r1!, {r4-r11}
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stmia r1!, {r3-r10}
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ldmia r0!, {r4-r11}
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ldmia r0!, {r3-r10}
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stmia r1!, {r4-r11}
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stmia r1!, {r3-r10}
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ldmia r0!, {r4-r11}
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ldmia r0!, {r3-r10}
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stmia r1!, {r4-r11}
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stmia r1!, {r3-r10}
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ldmia r0!, {r4-r11}
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ldmia r0!, {r3-r10}
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stmia r1!, {r4-r11}
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stmia r1!, {r3-r10}
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ldmia r0!, {r4-r11}
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ldmia r0!, {r3-r10}
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stmia r1!, {r4-r11}
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stmia r1!, {r3-r10}
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ldmia r0!, {r4-r11}
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ldmia r0!, {r3-r10}
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stmia r1!, {r4-r11}
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stmia r1!, {r3-r10}
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ldmia r0!, {r4-r11}
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ldmia r0!, {r3-r10}
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stmia r1!, {r4-r11}
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stmia r1!, {r3-r10}
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ldmia r0!, {r4-r11}
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ldmia r0!, {r3-r10}
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stmia r1!, {r4-r11}
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stmia r1!, {r3-r10}
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ldmia r0!, {r4-r11}
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ldmia r0!, {r3-r10}
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stmia r1!, {r4-r11}
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stmia r1!, {r3-r10}
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ldmia r0!, {r4-r11}
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ldmia r0!, {r3-r10}
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stmia r1!, {r4-r11}
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stmia r1!, {r3-r10}
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ldmia r0!, {r4-r11}
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ldmia r0!, {r3-r10}
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stmia r1!, {r4-r11}
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stmia r1!, {r3-r10}
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ldmia r0!, {r4-r11}
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ldmia r0!, {r3-r10}
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stmia r1!, {r4-r11}
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stmia r1!, {r3-r10}
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ldmia r0!, {r4-r11}
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ldmia r0!, {r3-r10}
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stmia r1!, {r4-r11}
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stmia r1!, {r3-r10}
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ldmia r0!, {r4-r11}
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ldmia r0!, {r3-r10}
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stmia r1!, {r4-r11}
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stmia r1!, {r3-r10}
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ldmia r0!, {r4-r11}
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ldmia r0!, {r3-r10}
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stmia r1!, {r4-r11}
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stmia r1!, {r3-r10}
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subs r3, r3, #1
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subs r2, r2, #1
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bgt loopcopy
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bne loopcopy
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ldmfd r13!, {r4-r11, r15}
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ldmfd sp!, {r4-r10, pc}
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/* bzero_page(dest)
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/*
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* r0 - dest
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* bzero_page(dest)
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* number of bytes is a multiple of 512
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*
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* Optimised zero page routine.
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*
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* On entry:
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* r0 - dest address
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*
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* Requires:
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* number of bytes per page (NBPG) is a multiple of 512
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*/
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*/
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.global _bzero_page
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.global _bzero_page
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_bzero_page:
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_bzero_page:
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mov r3, #(NBPG >> 9)
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stmfd sp!, {r4-r10, lr}
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stmfd r13!, {r4-r11, r14}
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#if defined(GPROF) && defined(PROFILE_ASM)
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mov ip, lr
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bl mcount
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#endif
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mov r2, #(NBPG >> 9)
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mov r3, #0
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mov r4, #0
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mov r4, #0
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mov r5, #0
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mov r5, #0
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mov r6, #0
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mov r6, #0
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@ -118,30 +142,29 @@ _bzero_page:
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mov r8, #0
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mov r8, #0
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mov r9, #0
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mov r9, #0
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mov r10, #0
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mov r10, #0
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mov r11, #0
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loopzero:
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loopzero:
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stmia r0!, {r4-r11}
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stmia r0!, {r3-r10}
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stmia r0!, {r4-r11}
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stmia r0!, {r3-r10}
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stmia r0!, {r4-r11}
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stmia r0!, {r3-r10}
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stmia r0!, {r4-r11}
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stmia r0!, {r3-r10}
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stmia r0!, {r4-r11}
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stmia r0!, {r3-r10}
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stmia r0!, {r4-r11}
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stmia r0!, {r3-r10}
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stmia r0!, {r4-r11}
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stmia r0!, {r3-r10}
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stmia r0!, {r4-r11}
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stmia r0!, {r3-r10}
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stmia r0!, {r4-r11}
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stmia r0!, {r3-r10}
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stmia r0!, {r4-r11}
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stmia r0!, {r3-r10}
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stmia r0!, {r4-r11}
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stmia r0!, {r3-r10}
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stmia r0!, {r4-r11}
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stmia r0!, {r3-r10}
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stmia r0!, {r4-r11}
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stmia r0!, {r3-r10}
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stmia r0!, {r4-r11}
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stmia r0!, {r3-r10}
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stmia r0!, {r4-r11}
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stmia r0!, {r3-r10}
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stmia r0!, {r4-r11}
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stmia r0!, {r3-r10}
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subs r3, r3, #1
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subs r2, r2, #1
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bgt loopzero
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bne loopzero
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ldmfd r13!, {r4-r11, r15}
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ldmfd sp!, {r4-r10, pc}
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