maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity

[Builtins] Fix div0 error in udivsi3 

Summary: Need to save `lr` before bl to aeabi_div0

Reviewers: rengolin, compnerd

Reviewed By: compnerd

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D31716

llvm-svn: 299628
This commit is contained in:
Weiming Zhao 2017-04-06 06:13:39 +00:00
parent f7298b0ef0
commit fbe67da29b
1 changed files with 14 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
compiler-rt/lib/builtins/arm/udivsi3.S
View File

@ -37,7 +37,16 @@ DEFINE_COMPILERRT_FUNCTION(__udivsi3)
beq LOCAL_LABEL(divby0) beq LOCAL_LABEL(divby0)
udiv r0, r0, r1 udiv r0, r0, r1
bx lr bx lr
LOCAL_LABEL(divby0):
mov r0, #0
# ifdef __ARM_EABI__
b __aeabi_idiv0
# else # else
JMP(lr)
# endif
#else /* ! __ARM_ARCH_EXT_IDIV__ */
cmp r1, #1 cmp r1, #1
bcc LOCAL_LABEL(divby0) bcc LOCAL_LABEL(divby0)
#if __ARM_ARCH_ISA_THUMB == 1 #if __ARM_ARCH_ISA_THUMB == 1
@ -186,9 +195,12 @@ LOCAL_LABEL(skip_1):
LOCAL_LABEL(divby0): LOCAL_LABEL(divby0):
movs r0, #0 movs r0, #0
# if defined(__ARM_EABI__) # if defined(__ARM_EABI__)
push {r7, lr}
bl __aeabi_idiv0 // due to relocation limit, can't use b. bl __aeabi_idiv0 // due to relocation limit, can't use b.
# endif pop {r7, pc}
# else
JMP(lr) JMP(lr)
# endif
#if __ARM_ARCH_ISA_THUMB == 1 #if __ARM_ARCH_ISA_THUMB == 1
@ -252,16 +264,6 @@ LOCAL_LABEL(div0block):
JMP(lr) JMP(lr)
#endif /* __ARM_ARCH_EXT_IDIV__ */ #endif /* __ARM_ARCH_EXT_IDIV__ */
#if __ARM_ARCH_EXT_IDIV__
LOCAL_LABEL(divby0):
mov r0, #0
# ifdef __ARM_EABI__
b __aeabi_idiv0
# else
JMP(lr)
# endif
#endif
END_COMPILERRT_FUNCTION(__udivsi3) END_COMPILERRT_FUNCTION(__udivsi3)
NO_EXEC_STACK_DIRECTIVE NO_EXEC_STACK_DIRECTIVE