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target/arm: Convert PLI, PLD, PLDW

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Backports commit beb595f657d615856fee904f1e0f74f5e1e299a3 from qemu
This commit is contained in:
Richard Henderson 2019-11-20 11:45:32 -05:00 committed by Lioncash
parent 5a23a1f020
commit 4593c67444
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GPG key ID: 4E3C3CC1031BA9C7
2 changed files with 30 additions and 17 deletions
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10
qemu/target/arm/a32-uncond.decode
View file

@ -54,3 +54,13 @@ SB 1111 0101 0111 1111 1111 0000 0111 0000
# Set Endianness
SETEND 1111 0001 0000 0001 0000 00 E:1 0 0000 0000 &setend
# Preload instructions
PLD 1111 0101 -101 ---- 1111 ---- ---- ---- # (imm, lit) 5te
PLDW 1111 0101 -001 ---- 1111 ---- ---- ---- # (imm, lit) 7mp
PLI 1111 0100 -101 ---- 1111 ---- ---- ---- # (imm, lit) 7
PLD 1111 0111 -101 ---- 1111 ----- -- 0 ---- # (register) 5te
PLDW 1111 0111 -001 ---- 1111 ----- -- 0 ---- # (register) 7mp
PLI 1111 0110 -101 ---- 1111 ----- -- 0 ---- # (register) 7

37
qemu/target/arm/translate.c
View file

@ -10592,6 +10592,26 @@ static bool trans_SETEND(DisasContext *s, arg_SETEND *a)
return true;
}
/*
* Preload instructions
* All are nops, contingent on the appropriate arch level.
*/
static bool trans_PLD(DisasContext *s, arg_PLD *a)
{
return ENABLE_ARCH_5TE;
}
static bool trans_PLDW(DisasContext *s, arg_PLD *a)
{
return arm_dc_feature(s, ARM_FEATURE_V7MP);
}
static bool trans_PLI(DisasContext *s, arg_PLD *a)
{
return ENABLE_ARCH_7;
}
/*
* Legacy decoder.
*/
@ -10661,23 +10681,6 @@ static void disas_arm_insn(DisasContext *s, unsigned int insn)
}
return;
}
if (((insn & 0x0f30f000) == 0x0510f000) ||
((insn & 0x0f30f010) == 0x0710f000)) {
if ((insn & (1 << 22)) == 0) {
/* PLDW; v7MP */
if (!arm_dc_feature(s, ARM_FEATURE_V7MP)) {
goto illegal_op;
}
}
/* Otherwise PLD; v5TE+ */
ARCH(5TE);
return;
}
if (((insn & 0x0f70f000) == 0x0450f000) ||
((insn & 0x0f70f010) == 0x0650f000)) {
ARCH(7);
return; /* PLI; V7 */
}
if (((insn & 0x0f700000) == 0x04100000) ||
((insn & 0x0f700010) == 0x06100000)) {
if (!arm_dc_feature(s, ARM_FEATURE_V7MP)) {