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-rw-r--r--arch/h8300/lib/udivsi3.S77
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diff --git a/arch/h8300/lib/udivsi3.S b/arch/h8300/lib/udivsi3.S
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index b810aba8e100..000000000000
--- a/arch/h8300/lib/udivsi3.S
+++ /dev/null
@@ -1,77 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#include "libgcc.h"
-
- ;; This function also computes the remainder and stores it in er3.
- .global __udivsi3
-__udivsi3:
- mov.w A1E,A1E ; denominator top word 0?
- bne DenHighNonZero
-
- ; do it the easy way, see page 107 in manual
- mov.w A0E,A2
- extu.l A2P
- divxu.w A1,A2P
- mov.w A2E,A0E
- divxu.w A1,A0P
- mov.w A0E,A3
- mov.w A2,A0E
- extu.l A3P
- rts
-
- ; er0 = er0 / er1
- ; er3 = er0 % er1
- ; trashes er1 er2
- ; expects er1 >= 2^16
-DenHighNonZero:
- mov.l er0,er3
- mov.l er1,er2
-#ifdef CONFIG_CPU_H8300H
-divmod_L21:
- shlr.l er0
- shlr.l er2 ; make divisor < 2^16
- mov.w e2,e2
- bne divmod_L21
-#else
- shlr.l #2,er2 ; make divisor < 2^16
- mov.w e2,e2
- beq divmod_L22A
-divmod_L21:
- shlr.l #2,er0
-divmod_L22:
- shlr.l #2,er2 ; make divisor < 2^16
- mov.w e2,e2
- bne divmod_L21
-divmod_L22A:
- rotxl.w r2
- bcs divmod_L23
- shlr.l er0
- bra divmod_L24
-divmod_L23:
- rotxr.w r2
- shlr.l #2,er0
-divmod_L24:
-#endif
- ;; At this point,
- ;; er0 contains shifted dividend
- ;; er1 contains divisor
- ;; er2 contains shifted divisor
- ;; er3 contains dividend, later remainder
- divxu.w r2,er0 ; r0 now contains the approximate quotient (AQ)
- extu.l er0
- beq divmod_L25
- subs #1,er0 ; er0 = AQ - 1
- mov.w e1,r2
- mulxu.w r0,er2 ; er2 = upper (AQ - 1) * divisor
- sub.w r2,e3 ; dividend - 65536 * er2
- mov.w r1,r2
- mulxu.w r0,er2 ; compute er3 = remainder (tentative)
- sub.l er2,er3 ; er3 = dividend - (AQ - 1) * divisor
-divmod_L25:
- cmp.l er1,er3 ; is divisor < remainder?
- blo divmod_L26
- adds #1,er0
- sub.l er1,er3 ; correct the remainder
-divmod_L26:
- rts
-
- .end