Gabe Black has uploaded this change for review. (
https://gem5-review.googlesource.com/c/public/gem5/+/41354 )
Change subject: arch-x86: Use popCount from bitfields.hh.
......................................................................
arch-x86: Use popCount from bitfields.hh.
Use popCount from bitfields.hh rather than call __builtin_popcountl
directly. That will ensure the instruction works whether or not that
builtin is available.
Change-Id: I947b35bb832b768936b489a58ee324adb8a90b5e
---
M src/arch/x86/isa/microops/regop.isa
1 file changed, 1 insertion(+), 4 deletions(-)
diff --git a/src/arch/x86/isa/microops/regop.isa
b/src/arch/x86/isa/microops/regop.isa
index 570c084..63a1683 100644
--- a/src/arch/x86/isa/microops/regop.isa
+++ b/src/arch/x86/isa/microops/regop.isa
@@ -1766,10 +1766,7 @@
'''
class Popcnt(RegOp):
- code = '''
- DestReg =
- merge(DestReg, __builtin_popcountl(psrc1), dataSize);
- '''
+ code = 'DestReg = merge(DestReg, popCount(psrc1), dataSize);'
flag_code = '''
ccFlagBits = ccFlagBits & ~(SFBit | AFBit | ZFBit | PFBit);
if (findZero(dataSize * 8, SrcReg1)) {
--
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Gerrit-Project: public/gem5
Gerrit-Branch: develop
Gerrit-Change-Id: I947b35bb832b768936b489a58ee324adb8a90b5e
Gerrit-Change-Number: 41354
Gerrit-PatchSet: 1
Gerrit-Owner: Gabe Black <[email protected]>
Gerrit-MessageType: newchange
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