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authorRichard Henderson <rth@twiddle.net>2013-08-20 16:50:38 -0700
committerRichard Henderson <rth@twiddle.net>2013-09-02 09:08:30 -0700
commitd5dad3be314dfec80ebb1c69266ae62edfea1850 (patch)
treee373d9f7324f8438a63e7706f4149169d6bbf884
parent357e3d8a297003f9d79f08e45a79a73eb2d12f5b (diff)
downloadqemu-arm-d5dad3be314dfec80ebb1c69266ae62edfea1850.tar.gz
tcg-i386: Adjust tcg_out_tlb_load for x32
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Richard Henderson <rth@twiddle.net>
-rw-r--r--tcg/i386/tcg-target.c41
1 files changed, 27 insertions, 14 deletions
diff --git a/tcg/i386/tcg-target.c b/tcg/i386/tcg-target.c
index 247c9d228a..cde134f60f 100644
--- a/tcg/i386/tcg-target.c
+++ b/tcg/i386/tcg-target.c
@@ -1085,33 +1085,46 @@ static inline void tcg_out_tlb_load(TCGContext *s, int addrlo_idx,
const int addrlo = args[addrlo_idx];
const int r0 = TCG_REG_L0;
const int r1 = TCG_REG_L1;
- TCGType type = TCG_TYPE_I32;
- int rexw = 0;
+ TCGType ttype = TCG_TYPE_I32;
+ TCGType htype = TCG_TYPE_I32;
+ int trexw = 0, hrexw = 0;
- if (TCG_TARGET_REG_BITS == 64 && TARGET_LONG_BITS == 64) {
- type = TCG_TYPE_I64;
- rexw = P_REXW;
+ if (TCG_TARGET_REG_BITS == 64) {
+ if (TARGET_LONG_BITS == 64) {
+ ttype = TCG_TYPE_I64;
+ trexw = P_REXW;
+ }
+ if (TCG_TYPE_PTR == TCG_TYPE_I64) {
+ htype = TCG_TYPE_I64;
+ hrexw = P_REXW;
+ }
}
- tcg_out_mov(s, type, r0, addrlo);
- tcg_out_mov(s, type, r1, addrlo);
+ tcg_out_mov(s, htype, r0, addrlo);
+ tcg_out_mov(s, ttype, r1, addrlo);
- tcg_out_shifti(s, SHIFT_SHR + rexw, r0,
+ tcg_out_shifti(s, SHIFT_SHR + hrexw, r0,
TARGET_PAGE_BITS - CPU_TLB_ENTRY_BITS);
- tgen_arithi(s, ARITH_AND + rexw, r1,
+ tgen_arithi(s, ARITH_AND + trexw, r1,
TARGET_PAGE_MASK | ((1 << s_bits) - 1), 0);
- tgen_arithi(s, ARITH_AND + rexw, r0,
+ tgen_arithi(s, ARITH_AND + hrexw, r0,
(CPU_TLB_SIZE - 1) << CPU_TLB_ENTRY_BITS, 0);
- tcg_out_modrm_sib_offset(s, OPC_LEA + P_REXW, r0, TCG_AREG0, r0, 0,
+ tcg_out_modrm_sib_offset(s, OPC_LEA + hrexw, r0, TCG_AREG0, r0, 0,
offsetof(CPUArchState, tlb_table[mem_index][0])
+ which);
/* cmp 0(r0), r1 */
- tcg_out_modrm_offset(s, OPC_CMP_GvEv + rexw, r1, r0, 0);
+ tcg_out_modrm_offset(s, OPC_CMP_GvEv + trexw, r1, r0, 0);
- tcg_out_mov(s, type, r1, addrlo);
+ /* Prepare for both the fast path add of the tlb addend, and the slow
+ path function argument setup. There are two cases worth note:
+ For 32-bit guest and x86_64 host, MOVL zero-extends the guest address
+ before the fastpath ADDQ below. For 64-bit guest and x32 host, MOVQ
+ copies the entire guest address for the slow path, while truncation
+ for the 32-bit host happens with the fastpath ADDL below. */
+ tcg_out_mov(s, ttype, r1, addrlo);
/* jne slow_path */
tcg_out_opc(s, OPC_JCC_long + JCC_JNE, 0, 0, 0);
@@ -1131,7 +1144,7 @@ static inline void tcg_out_tlb_load(TCGContext *s, int addrlo_idx,
/* TLB Hit. */
/* add addend(r0), r1 */
- tcg_out_modrm_offset(s, OPC_ADD_GvEv + P_REXW, r1, r0,
+ tcg_out_modrm_offset(s, OPC_ADD_GvEv + hrexw, r1, r0,
offsetof(CPUTLBEntry, addend) - which);
}
#elif defined(__x86_64__) && defined(__linux__)