mirrors/qemu
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

RISC-V: Replace __builtin_popcount with ctpop8 in PLIC

Browse Source 
The mode variable only uses the lower 4-bits (M,H,S,U) so
replace the GCC specific __builtin_popcount with ctpop8.

Cc: Palmer Dabbelt <palmer@sifive.com>
Cc: Sagar Karandikar <sagark@eecs.berkeley.edu>
Cc: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Cc: Alistair Francis <Alistair.Francis@wdc.com>
Signed-off-by: Michael Clark <mjc@sifive.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
This commit is contained in:
Michael Clark 2019-03-16 01:20:11 +00:00 committed by Palmer Dabbelt
parent aad5ac2311
commit 244df42133
No known key found for this signature in database
GPG Key ID: EF4CA1502CCBAB41
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
hw/riscv/sifive_plic.c
View File

@ -383,7 +383,7 @@ static void parse_hart_config(SiFivePLICState *plic)
p = plic->hart_config; p = plic->hart_config;
while ((c = *p++)) { while ((c = *p++)) {
if (c == ',') { if (c == ',') {
addrid += __builtin_popcount(modes); addrid += ctpop8(modes);
modes = 0; modes = 0;
hartid++; hartid++;
} else { } else {
@ -397,7 +397,7 @@ static void parse_hart_config(SiFivePLICState *plic)
} }
} }
if (modes) { if (modes) {
addrid += __builtin_popcount(modes); addrid += ctpop8(modes);
} }
hartid++; hartid++;