mirror of
https://gitlab.com/qemu-project/qemu
synced 2024-09-06 18:05:37 +00:00
tcg-ppc64: Fold constant call address into descriptor load
Eliminates one insn per call: : lis r2,4165 -: ori r2,r2,59616 -: ld r0,0(r2) +: ld r0,-5920(r2) : mtctr r0 -: ld r2,8(r2) +: ld r2,-5912(r2) : bctrl Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
parent
ad94e1a9db
commit
d40f3cb112
|
@ -713,16 +713,24 @@ static void tcg_out_call(TCGContext *s, tcg_target_long arg, int const_arg)
|
|||
tcg_out32(s, BCLR | BO_ALWAYS | LK);
|
||||
}
|
||||
#else
|
||||
int reg = arg;
|
||||
TCGReg reg = arg;
|
||||
int ofs = 0;
|
||||
|
||||
if (const_arg) {
|
||||
/* Fold the low bits of the constant into the addresses below. */
|
||||
ofs = (int16_t)arg;
|
||||
if (ofs + 8 < 0x8000) {
|
||||
arg -= ofs;
|
||||
} else {
|
||||
ofs = 0;
|
||||
}
|
||||
reg = TCG_REG_R2;
|
||||
tcg_out_movi(s, TCG_TYPE_I64, reg, arg);
|
||||
}
|
||||
|
||||
tcg_out32(s, LD | TAI(TCG_REG_R0, reg, 0));
|
||||
tcg_out32(s, LD | TAI(TCG_REG_R0, reg, ofs));
|
||||
tcg_out32(s, MTSPR | RA(TCG_REG_R0) | CTR);
|
||||
tcg_out32(s, LD | TAI(TCG_REG_R2, reg, 8));
|
||||
tcg_out32(s, LD | TAI(TCG_REG_R2, reg, ofs + 8));
|
||||
tcg_out32(s, BCCTR | BO_ALWAYS | LK);
|
||||
#endif
|
||||
}
|
||||
|
|
Loading…
Reference in a new issue