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| author | Weiming Zhao <weimingz@codeaurora.org> | 2016-12-07 19:14:29 +0000 |
|---|---|---|
| committer | Weiming Zhao <weimingz@codeaurora.org> | 2016-12-07 19:14:29 +0000 |
| commit | 0a274c59546a09f3bee5f54bd4ebeff5de712edf (patch) | |
| tree | 3c19db7231094760e6dc64c34bae42c719dfcf33 | |
| parent | f3ecc9a1a894aa3432c60f12f8d84bf9474a5be0 (diff) | |
| download | bcm5719-llvm-0a274c59546a09f3bee5f54bd4ebeff5de712edf.tar.gz bcm5719-llvm-0a274c59546a09f3bee5f54bd4ebeff5de712edf.zip | |
[builtin] Add Thumb1 implementation for idivsi3 and aeabi_idivmod
Summary:
For idivsi3, convert the Thumb2 only instruction to thumb1.
For aeabi_idivmod, using __divsi3.
Reviewers: rengolin, compnerd
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D27472
llvm-svn: 288960
| -rw-r--r-- | compiler-rt/lib/builtins/arm/aeabi_idivmod.S | 9 | ||||
| -rw-r--r-- | compiler-rt/lib/builtins/arm/divsi3.S | 20 |
2 files changed, 29 insertions, 0 deletions
diff --git a/compiler-rt/lib/builtins/arm/aeabi_idivmod.S b/compiler-rt/lib/builtins/arm/aeabi_idivmod.S index 8ad10189e8d..b43ea699058 100644 --- a/compiler-rt/lib/builtins/arm/aeabi_idivmod.S +++ b/compiler-rt/lib/builtins/arm/aeabi_idivmod.S @@ -22,6 +22,14 @@ .syntax unified .p2align 2 DEFINE_COMPILERRT_FUNCTION(__aeabi_idivmod) +#if __ARM_ARCH_ISA_THUMB == 1 + push {r0, r1, lr} + bl SYMBOL_NAME(__divsi3) + pop {r1, r2, r3} // now r0 = quot, r1 = num, r2 = denom + muls r2, r2, r0 // r2 = quot * denom + subs r1, r1, r2 + JMP (r3) +#else push { lr } sub sp, sp, #4 mov r2, sp @@ -34,6 +42,7 @@ DEFINE_COMPILERRT_FUNCTION(__aeabi_idivmod) ldr r1, [sp] add sp, sp, #4 pop { pc } +#endif // __ARM_ARCH_ISA_THUMB == 1 END_COMPILERRT_FUNCTION(__aeabi_idivmod) NO_EXEC_STACK_DIRECTIVE diff --git a/compiler-rt/lib/builtins/arm/divsi3.S b/compiler-rt/lib/builtins/arm/divsi3.S index 7e23ba4fc23..f066f60ad96 100644 --- a/compiler-rt/lib/builtins/arm/divsi3.S +++ b/compiler-rt/lib/builtins/arm/divsi3.S @@ -49,17 +49,37 @@ LOCAL_LABEL(divzero): #else ESTABLISH_FRAME // Set aside the sign of the quotient. +# if __ARM_ARCH_ISA_THUMB == 1 + movs r4, r0 + eors r4, r1 +# else eor r4, r0, r1 +# endif // Take absolute value of a and b via abs(x) = (x^(x >> 31)) - (x >> 31). +# if __ARM_ARCH_ISA_THUMB == 1 + asrs r2, r0, #31 + asrs r3, r1, #31 + eors r0, r2 + eors r1, r3 + subs r0, r0, r2 + subs r1, r1, r3 +# else eor r2, r0, r0, asr #31 eor r3, r1, r1, asr #31 sub r0, r2, r0, asr #31 sub r1, r3, r1, asr #31 +# endif // abs(a) / abs(b) bl SYMBOL_NAME(__udivsi3) // Apply sign of quotient to result and return. +# if __ARM_ARCH_ISA_THUMB == 1 + asrs r4, #31 + eors r0, r4 + subs r0, r0, r4 +# else eor r0, r0, r4, asr #31 sub r0, r0, r4, asr #31 +# endif CLEAR_FRAME_AND_RETURN #endif END_COMPILERRT_FUNCTION(__divsi3) |
