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tcg/i386: Propagate is64 to tcg_out_qemu_ld_slow_path

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This helps preserve the invariant that all TCG_TYPE_I32 values
are stored zero-extended in the 64-bit host registers.

Backports commit 3dbc8c61de4e0d0a2afe0897cda7ab28cd37a164 from qemu
This commit is contained in:
Richard Henderson 2018-12-18 05:36:57 -05:00 committed by Lioncash
parent bdd6118105
commit 4e882a95f3
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GPG key ID: 4E3C3CC1031BA9C7
1 changed files with 8 additions and 5 deletions
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13
qemu/tcg/i386/tcg-target.inc.c
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@ -1797,7 +1797,8 @@ static inline void tcg_out_tlb_load(TCGContext *s, TCGReg addrlo, TCGReg addrhi,
* Record the context of a call to the out of line helper code for the slow path
* for a load or store, so that we can later generate the correct helper code
*/
static void add_qemu_ldst_label(TCGContext *s, bool is_ld, TCGMemOpIdx oi,
static void add_qemu_ldst_label(TCGContext *s, bool is_ld, bool is_64,
TCGMemOpIdx oi,
TCGReg datalo, TCGReg datahi,
TCGReg addrlo, TCGReg addrhi,
tcg_insn_unit *raddr,
@ -1807,6 +1808,7 @@ static void add_qemu_ldst_label(TCGContext *s, bool is_ld, TCGMemOpIdx oi,
label->is_ld = is_ld;
label->oi = oi;
label->type = is_64 ? TCG_TYPE_I64 : TCG_TYPE_I32;
label->datalo_reg = datalo;
label->datahi_reg = datahi;
label->addrlo_reg = addrlo;
@ -1827,6 +1829,7 @@ static void tcg_out_qemu_ld_slow_path(TCGContext *s, TCGLabelQemuLdst *l)
TCGMemOp opc = get_memop(oi);
TCGReg data_reg;
tcg_insn_unit **label_ptr = &l->label_ptr[0];
int rexw = (l->type == TCG_TYPE_I64 ? P_REXW : 0);
/* resolve label address */
tcg_patch32(label_ptr[0], s->code_ptr - label_ptr[0] - 4);
@ -1865,10 +1868,10 @@ static void tcg_out_qemu_ld_slow_path(TCGContext *s, TCGLabelQemuLdst *l)
data_reg = l->datalo_reg;
switch (opc & MO_SSIZE) {
case MO_SB:
tcg_out_ext8s(s, data_reg, TCG_REG_EAX, P_REXW);
tcg_out_ext8s(s, data_reg, TCG_REG_EAX, rexw);
break;
case MO_SW:
tcg_out_ext16s(s, data_reg, TCG_REG_EAX, P_REXW);
tcg_out_ext16s(s, data_reg, TCG_REG_EAX, rexw);
break;
#if TCG_TARGET_REG_BITS == 64
case MO_SL:
@ -2117,7 +2120,7 @@ static void tcg_out_qemu_ld(TCGContext *s, const TCGArg *args, bool is64)
tcg_out_qemu_ld_direct(s, datalo, datahi, TCG_REG_L1, -1, 0, 0, is64, opc);
/* Record the current context of a load into ldst label */
add_qemu_ldst_label(s, true, oi, datalo, datahi, addrlo, addrhi,
add_qemu_ldst_label(s, true, is64, oi, datalo, datahi, addrlo, addrhi,
s->code_ptr, label_ptr);
#else
{
@ -2257,7 +2260,7 @@ static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args, bool is64)
tcg_out_qemu_st_direct(s, datalo, datahi, TCG_REG_L1, 0, 0, opc);
/* Record the current context of a store into ldst label */
add_qemu_ldst_label(s, false, oi, datalo, datahi, addrlo, addrhi,
add_qemu_ldst_label(s, false, is64, oi, datalo, datahi, addrlo, addrhi,
s->code_ptr, label_ptr);
#else
{