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target/arm: Implement FMOV (immediate) for fp16

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All the hard work is already done by vfp_expand_imm, we just need to
make sure we pick up the correct size.

Backports commit 6ba28ddb9be37bdb67e3e38007a53ccbdcd010df from qemu
This commit is contained in:
Alex Bennée 2018-05-15 22:28:39 -04:00 committed by Lioncash
parent cd76e7aaaa
commit f8e1f71df9
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GPG key ID: 4E3C3CC1031BA9C7
1 changed files with 17 additions and 3 deletions
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20
qemu/target/arm/translate-a64.c
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@ -5779,11 +5779,25 @@ static void disas_fp_imm(DisasContext *s, uint32_t insn)
TCGContext *tcg_ctx = s->uc->tcg_ctx;
int rd = extract32(insn, 0, 5);
int imm8 = extract32(insn, 13, 8);
int is_double = extract32(insn, 22, 2);
int type = extract32(insn, 22, 2);
uint64_t imm;
TCGv_i64 tcg_res;
TCGMemOp sz;
if (is_double > 1) {
switch (type) {
case 0:
sz = MO_32;
break;
case 1:
sz = MO_64;
break;
case 3:
sz = MO_16;
if (arm_dc_feature(s, ARM_FEATURE_V8_FP16)) {
break;
}
/* fallthru */
default:
unallocated_encoding(s);
return;
}
@ -5792,7 +5806,7 @@ static void disas_fp_imm(DisasContext *s, uint32_t insn)
return;
}
imm = vfp_expand_imm(MO_32 + is_double, imm8);
imm = vfp_expand_imm(sz, imm8);
tcg_res = tcg_const_i64(tcg_ctx, imm);
write_fp_dreg(s, rd, tcg_res);