6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-12-23 15:29:51 +00:00
Code Issues Projects Releases Wiki Activity

Attempt to make the bit-twiddling readable resulted in the binary value being

Browse Source 
overwritten.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121337 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling 2010-12-09 00:44:33 +00:00
parent 09aa3f0ef3
commit 797b7aab35
1 changed files with 10 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
lib/Target/ARM/ARMAsmBackend.cpp
View File

@ -152,10 +152,11 @@ static unsigned adjustFixupValue(unsigned Kind, uint64_t Value) {
// Note that the halfwords are stored high first, low second; so we need // Note that the halfwords are stored high first, low second; so we need
// to transpose the fixup value here to map properly. // to transpose the fixup value here to map properly.
unsigned isNeg = (int64_t(Value) < 0) ? 1 : 0; unsigned isNeg = (int64_t(Value) < 0) ? 1 : 0;
uint32_t Binary = 0x3fffff & ((Value - 4) >> 1); uint32_t Binary = 0;
Binary = (Binary & 0x7ff) << 16; // Low imm11 value. Value = 0x3fffff & ((Value - 4) >> 1);
Binary |= (Binary & 0x1ffc00) >> 11; // High imm10 value. Binary = (Value & 0x7ff) << 16; // Low imm11 value.
Binary |= isNeg << 10; // Sign bit. Binary |= (Value & 0x1ffc00) >> 11; // High imm10 value.
Binary |= isNeg << 10; // Sign bit.
return Binary; return Binary;
} }
case ARM::fixup_arm_thumb_blx: { case ARM::fixup_arm_thumb_blx: {
@ -169,10 +170,11 @@ static unsigned adjustFixupValue(unsigned Kind, uint64_t Value) {
// Note that the halfwords are stored high first, low second; so we need // Note that the halfwords are stored high first, low second; so we need
// to transpose the fixup value here to map properly. // to transpose the fixup value here to map properly.
unsigned isNeg = (int64_t(Value) < 0) ? 1 : 0; unsigned isNeg = (int64_t(Value) < 0) ? 1 : 0;
uint32_t Binary = 0xfffff & ((Value - 2) >> 2); uint32_t Binary = 0;
Binary = (Binary & 0x3ff) << 17; // Low imm10L value. Value = 0xfffff & ((Value - 2) >> 2);
Binary |= (Binary & 0xffc00) >> 10; // High imm10H value. Binary = (Value & 0x3ff) << 17; // Low imm10L value.
Binary |= isNeg << 10; // Sign bit. Binary |= (Value & 0xffc00) >> 10; // High imm10H value.
Binary |= isNeg << 10; // Sign bit.
return Binary; return Binary;
} }
case ARM::fixup_arm_thumb_cp: case ARM::fixup_arm_thumb_cp: