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tcg/s390x: Generalize movcond implementation 

Generalize movcond to support pre-computed conditions, and the same
set of arguments at all times.  This will be assumed by a following
patch, which needs to reuse tgen_movcond_int.

Reviewed-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2022-02-24 00:24:05 +00:00
parent 5c837bbca6
commit 23d1394a6d
2 changed files with 41 additions and 14 deletions
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3
tcg/s390x/tcg-target-con-set.h
View File

@ -33,8 +33,7 @@ C_O1_I2(r, rZ, r)
C_O1_I2(v, v, r)
C_O1_I2(v, v, v)
C_O1_I3(v, v, v, v)
C_O1_I4(r, r, ri, r, 0)
C_O1_I4(r, r, ri, rI, 0)
C_O1_I4(r, r, ri, rI, r)
C_O2_I2(o, m, 0, r)
C_O2_I2(o, m, r, r)
C_O2_I3(o, m, 0, 1, r)

52
tcg/s390x/tcg-target.c.inc
View File

@ -1354,19 +1354,49 @@ static void tgen_setcond(TCGContext *s, TCGType type, TCGCond cond,
tcg_out_insn(s, RRFc, LOCGR, dest, TCG_TMP0, cc);
}
static void tgen_movcond_int(TCGContext *s, TCGType type, TCGReg dest,
TCGArg v3, int v3const, TCGReg v4,
int cc, int inv_cc)
{
TCGReg src;
if (v3const) {
if (dest == v4) {
if (HAVE_FACILITY(LOAD_ON_COND2)) {
/* Emit: if (cc) dest = v3. */
tcg_out_insn(s, RIEg, LOCGHI, dest, v3, cc);
return;
}
tcg_out_insn(s, RI, LGHI, TCG_TMP0, v3);
src = TCG_TMP0;
} else {
/* LGR+LOCGHI is larger than LGHI+LOCGR. */
tcg_out_insn(s, RI, LGHI, dest, v3);
cc = inv_cc;
src = v4;
}
} else {
if (dest == v4) {
src = v3;
} else {
tcg_out_mov(s, type, dest, v3);
cc = inv_cc;
src = v4;
}
}
/* Emit: if (cc) dest = src. */
tcg_out_insn(s, RRFc, LOCGR, dest, src, cc);
}
static void tgen_movcond(TCGContext *s, TCGType type, TCGCond c, TCGReg dest,
TCGReg c1, TCGArg c2, int c2const,
TCGArg v3, int v3const)
TCGArg v3, int v3const, TCGReg v4)
{
int cc, inv_cc;
cc = tgen_cmp2(s, type, c, c1, c2, c2const, false, &inv_cc);
if (v3const) {
tcg_out_insn(s, RIEg, LOCGHI, dest, v3, cc);
} else {
tcg_out_insn(s, RRFc, LOCGR, dest, v3, cc);
}
tgen_movcond_int(s, type, dest, v3, v3const, v4, cc, inv_cc);
}
static void tgen_clz(TCGContext *s, TCGReg dest, TCGReg a1,
@ -2225,7 +2255,7 @@ static inline void tcg_out_op(TCGContext *s, TCGOpcode opc,
break;
case INDEX_op_movcond_i32:
tgen_movcond(s, TCG_TYPE_I32, args[5], args[0], args[1],
args[2], const_args[2], args[3], const_args[3]);
args[2], const_args[2], args[3], const_args[3], args[4]);
break;
case INDEX_op_qemu_ld_i32:
@ -2509,7 +2539,7 @@ static inline void tcg_out_op(TCGContext *s, TCGOpcode opc,
break;
case INDEX_op_movcond_i64:
tgen_movcond(s, TCG_TYPE_I64, args[5], args[0], args[1],
args[2], const_args[2], args[3], const_args[3]);
args[2], const_args[2], args[3], const_args[3], args[4]);
break;
OP_32_64(deposit):
@ -3114,9 +3144,7 @@ static TCGConstraintSetIndex tcg_target_op_def(TCGOpcode op)
case INDEX_op_movcond_i32:
case INDEX_op_movcond_i64:
return (HAVE_FACILITY(LOAD_ON_COND2)
? C_O1_I4(r, r, ri, rI, 0)
: C_O1_I4(r, r, ri, r, 0));
return C_O1_I4(r, r, ri, rI, r);
case INDEX_op_div2_i32:
case INDEX_op_div2_i64: