8bf15723ae
Summary: Value of __ARM_ARCH_ISA_THUMB isn't based on the actual compilation mode (-mthumb, -marm), it reflect's capability of given CPU. Due to this: •use tbumb and thumb2 insteand of __ARM_ARCH_ISA_THUMB •use '.thumb' directive consistently in all affected files •decorate all thumb functions using DEFINE_COMPILERRT_THUMB_FUNCTION() (This is based off Michal's patch https://reviews.llvm.org/D30938) Reviewers: dim, rengolin, compnerd, strejda Reviewed By: compnerd Subscribers: peter.smith, kubamracek, mgorny, javed.absar, kristof.beyls, jamesduley, aemerson, llvm-commits Differential Revision: https://reviews.llvm.org/D31220 llvm-svn: 310884
37 lines
843 B
ArmAsm
37 lines
843 B
ArmAsm
//===------- bswapsi2 - Implement bswapsi2 --------------------------------===//
|
|
//
|
|
// 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.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "../assembly.h"
|
|
|
|
.syntax unified
|
|
.text
|
|
DEFINE_CODE_STATE
|
|
|
|
//
|
|
// extern uint32_t __bswapsi2(uint32_t);
|
|
//
|
|
// Reverse all the bytes in a 32-bit integer.
|
|
//
|
|
.p2align 2
|
|
DEFINE_COMPILERRT_FUNCTION(__bswapsi2)
|
|
#if __ARM_ARCH < 6
|
|
// before armv6 does not have "rev" instruction
|
|
eor r1, r0, r0, ror #16
|
|
bic r1, r1, #0xff0000
|
|
mov r1, r1, lsr #8
|
|
eor r0, r1, r0, ror #8
|
|
#else
|
|
rev r0, r0
|
|
#endif
|
|
JMP(lr)
|
|
END_COMPILERRT_FUNCTION(__bswapsi2)
|
|
|
|
NO_EXEC_STACK_DIRECTIVE
|
|
|