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target/arm: Convert SETEND

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Backports commit 48c04a5dfaf2c08e00b659a22c502ec098999cf1 from qemu
This commit is contained in:
Richard Henderson 2019-11-20 11:43:54 -05:00 committed by Lioncash
parent 55390520d6
commit 5a23a1f020
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GPG key ID: 4E3C3CC1031BA9C7
2 changed files with 18 additions and 9 deletions
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4
qemu/target/arm/a32-uncond.decode
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@ -24,6 +24,7 @@
&empty !extern
&i !extern imm
&setend E
# Branch with Link and Exchange
@ -50,3 +51,6 @@ DSB 1111 0101 0111 1111 1111 0000 0100 ----
DMB 1111 0101 0111 1111 1111 0000 0101 ----
ISB 1111 0101 0111 1111 1111 0000 0110 ----
SB 1111 0101 0111 1111 1111 0000 0111 0000
# Set Endianness
SETEND 1111 0001 0000 0001 0000 00 E:1 0 0000 0000 &setend

23
qemu/target/arm/translate.c
View file

@ -10579,6 +10579,19 @@ static bool trans_CPS(DisasContext *s, arg_CPS *a)
return true;
}
static bool trans_SETEND(DisasContext *s, arg_SETEND *a)
{
TCGContext *tcg_ctx = s->uc->tcg_ctx;
if (!ENABLE_ARCH_6) {
return false;
}
if (a->E != (s->be_data == MO_BE)) {
gen_helper_setend(tcg_ctx, tcg_ctx->cpu_env);
s->base.is_jmp = DISAS_UPDATE;
}
return true;
}
/*
* Legacy decoder.
*/
@ -10673,15 +10686,7 @@ static void disas_arm_insn(DisasContext *s, unsigned int insn)
return; /* v7MP: Unallocated memory hint: must NOP */
}
if ((insn & 0x0ffffdff) == 0x01010000) {
ARCH(6);
/* setend */
if (((insn >> 9) & 1) != !!(s->be_data == MO_BE)) {
gen_helper_setend(tcg_ctx, tcg_ctx->cpu_env);
s->base.is_jmp = DISAS_UPDATE;
}
return;
} else if ((insn & 0x0e000f00) == 0x0c000100) {
if ((insn & 0x0e000f00) == 0x0c000100) {
if (arm_dc_feature(s, ARM_FEATURE_IWMMXT)) {
/* iWMMXt register transfer. */
if (extract32(s->c15_cpar, 1, 1)) {