diff options
Diffstat (limited to 'lib/arm/modsi3.S')
| -rw-r--r-- | lib/arm/modsi3.S | 50 |
1 files changed, 0 insertions, 50 deletions
diff --git a/lib/arm/modsi3.S b/lib/arm/modsi3.S deleted file mode 100644 index fe75b41b1331..000000000000 --- a/lib/arm/modsi3.S +++ /dev/null @@ -1,50 +0,0 @@ -/*===-- modsi3.S - 32-bit signed integer modulus --------------------------===// - * - * The LLVM Compiler Infrastructure - * - * This file is dual licensed under the MIT and the University of Illinois Open - * Source Licenses. See LICENSE.TXT for details. - * - *===----------------------------------------------------------------------===// - * - * This file implements the __modsi3 (32-bit signed integer modulus) function - * for the ARM architecture as a wrapper around the unsigned routine. - * - *===----------------------------------------------------------------------===*/ - -#include "../assembly.h" - -#define ESTABLISH_FRAME \ - push {r4, r7, lr} ;\ - add r7, sp, #4 -#define CLEAR_FRAME_AND_RETURN \ - pop {r4, r7, pc} - -.syntax unified -.align 3 -DEFINE_COMPILERRT_FUNCTION(__modsi3) -#if __ARM_ARCH_EXT_IDIV__ - tst r1, r1 - beq LOCAL_LABEL(divzero) - sdiv r2, r0, r1 - mls r0, r2, r1, r0 - bx lr -LOCAL_LABEL(divzero): - mov r0, #0 - bx lr -#else - ESTABLISH_FRAME - // Set aside the sign of the dividend. - mov r4, r0 - // Take absolute value of a and b via abs(x) = (x^(x >> 31)) - (x >> 31). - eor r2, r0, r0, asr #31 - eor r3, r1, r1, asr #31 - sub r0, r2, r0, asr #31 - sub r1, r3, r1, asr #31 - // abs(a) % abs(b) - bl SYMBOL_NAME(__umodsi3) - // Apply sign of dividend to result and return. - eor r0, r0, r4, asr #31 - sub r0, r0, r4, asr #31 - CLEAR_FRAME_AND_RETURN -#endif |