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target/s390x: Implement load-and-zero-rightmost-byte insns 

Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Richard Henderson 2017-06-16 16:47:51 -07:00
parent 45aa9aa3b7
commit c2a5c1d718
2 changed files with 12 additions and 0 deletions
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5
target/s390x/insn-data.def
View File

@ -427,6 +427,11 @@
/* LOAD AND TRAP */
C(0xe39f, LAT, RXY_a, LAT, 0, m2_32u, r1, 0, lat, 0)
C(0xe385, LGAT, RXY_a, LAT, 0, a2, r1, 0, lgat, 0)
/* LOAD AND ZERO RIGHTMOST BYTE */
C(0xe3eb, LZRF, RXY_a, LZRB, 0, m2_32u, new, r1_32, lzrb, 0)
C(0xe32a, LZRG, RXY_a, LZRB, 0, m2_64, r1, 0, lzrb, 0)
/* LOAD LOGICAL AND ZERO RIGHTMOST BYTE */
C(0xe33a, LLZRGF, RXY_a, LZRB, 0, m2_32u, r1, 0, lzrb, 0)
/* LOAD BYTE */
C(0xb926, LBR, RRE, EI, 0, r2_8s, 0, r1_32, mov2, 0)
C(0xb906, LGBR, RRE, EI, 0, r2_8s, 0, r1, mov2, 0)

7
target/s390x/translate.c
View File

@ -2906,6 +2906,12 @@ static ExitStatus op_lurag(DisasContext *s, DisasOps *o)
}
#endif
static ExitStatus op_lzrb(DisasContext *s, DisasOps *o)
{
tcg_gen_andi_i64(o->out, o->in2, -256);
return NO_EXIT;
}
static ExitStatus op_mov2(DisasContext *s, DisasOps *o)
{
o->out = o->in2;
@ -5437,6 +5443,7 @@ enum DisasInsnEnum {
#define FAC_LPP S390_FEAT_SET_PROGRAM_PARAMETERS /* load-program-parameter */
#define FAC_DAT_ENH S390_FEAT_DAT_ENH
#define FAC_E2 S390_FEAT_EXTENDED_TRANSLATION_2
#define FAC_LZRB S390_FEAT_STFLE_53 /* load-and-zero-rightmost-byte */
static const DisasInsn insn_info[] = {
#include "insn-data.def"