yuzu/unicorn
1
0
Fork 0
mirror of https://github.com/yuzu-emu/unicorn.git synced 2024-12-23 15:05:37 +00:00
Code Issues Packages Projects Releases Wiki Activity

arm/translate-a64: add FP16 FMOV to simd_mod_imm

Browse source 
Only one half-precision instruction has been added to this group.

Backports commit 70b4e6a445715519ae55179dc54f6e961ab30c27 from qemu
This commit is contained in:
Alex Bennée 2018-03-08 22:48:26 -05:00 committed by Lioncash
parent b117df18df
commit 8bbabd7eb3
No known key found for this signature in database
GPG key ID: 4E3C3CC1031BA9C7
1 changed files with 25 additions and 10 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

35
qemu/target/arm/translate-a64.c
View file

@ -6350,6 +6350,8 @@ static void disas_simd_copy(DisasContext *s, uint32_t insn)
* MVNI - move inverted (shifted) imm into register
* ORR - bitwise OR of (shifted) imm with register
* BIC - bitwise clear of (shifted) imm with register
* With ARMv8.2 we also have:
* FMOV half-precision
*/
static void disas_simd_mod_imm(DisasContext *s, uint32_t insn)
{
@ -6365,8 +6367,11 @@ static void disas_simd_mod_imm(DisasContext *s, uint32_t insn)
uint64_t imm = 0;
if (o2 != 0 || ((cmode == 0xf) && is_neg && !is_q)) {
unallocated_encoding(s);
return;
/* Check for FMOV (vector, immediate) - half-precision */
if (!(arm_dc_feature(s, ARM_FEATURE_V8_FP16) && o2 && cmode == 0xf)) {
unallocated_encoding(s);
return;
}
}
if (!fp_access_check(s)) {
@ -6424,19 +6429,29 @@ static void disas_simd_mod_imm(DisasContext *s, uint32_t insn)
imm |= 0x4000000000000000ULL;
}
} else {
imm = (abcdefgh & 0x3f) << 19;
if (abcdefgh & 0x80) {
imm |= 0x80000000;
}
if (abcdefgh & 0x40) {
imm |= 0x3e000000;
if (o2) {
/* FMOV (vector, immediate) - half-precision */
imm = vfp_expand_imm(MO_16, abcdefgh);
/* now duplicate across the lanes */
imm = bitfield_replicate(imm, 16);
} else {
imm |= 0x40000000;
imm = (abcdefgh & 0x3f) << 19;
if (abcdefgh & 0x80) {
imm |= 0x80000000;
}
if (abcdefgh & 0x40) {
imm |= 0x3e000000;
} else {
imm |= 0x40000000;
}
imm |= (imm << 32);
}
imm |= (imm << 32);
}
}
break;
default:
fprintf(stderr, "%s: cmode_3_1: %x\n", __func__, cmode_3_1);
g_assert_not_reached();
}
if (cmode_3_1 != 7 && is_neg) {