From b68a3ee82a8a34f7bae1d68d76f574e76a5535ef Mon Sep 17 00:00:00 2001 From: Johnny Chen Date: Fri, 2 Apr 2010 22:27:38 +0000 Subject: Second try of initial ARM/Thumb disassembler check-in. It consists of a tablgen backend (ARMDecoderEmitter) which emits the decoder functions for ARM and Thumb, and the disassembler core which invokes the decoder function and builds up the MCInst based on the decoded Opcode. Reviewed by Chris Latter and Bob Wilson. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100233 91177308-0d34-0410-b5e6-96231b3b80d8 --- include/llvm/Support/MathExtras.h | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'include/llvm/Support') diff --git a/include/llvm/Support/MathExtras.h b/include/llvm/Support/MathExtras.h index 9c5f32cd5f..f56241c579 100644 --- a/include/llvm/Support/MathExtras.h +++ b/include/llvm/Support/MathExtras.h @@ -457,6 +457,18 @@ inline int64_t abs64(int64_t x) { return (x < 0) ? -x : x; } +/// SignExtend32 - Sign extend B-bit number x to 32-bit int. +/// Usage int32_t r = SignExtend32<5>(x); +template inline int32_t SignExtend32(int32_t x) { + return (x << (32 - B)) >> (32 - B); +} + +/// SignExtend64 - Sign extend B-bit number x to 64-bit int. +/// Usage int64_t r = SignExtend64<5>(x); +template inline int64_t SignExtend64(int32_t x) { + return (x << (64 - B)) >> (64 - B); +} + } // End llvm namespace #endif -- cgit v1.2.3-18-g5258