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tcg: Add INDEX_op_qemu_{ld,st}_i128

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Add opcodes for backend support for 128-bit memory operations.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2022-11-07 10:42:56 +11:00
parent 7b88010719
commit 12fde9bcdb
15 changed files with 108 additions and 11 deletions
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69
tcg/tcg-op.c
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@ -3205,7 +3205,7 @@ static void canonicalize_memop_i128_as_i64(MemOp ret[2], MemOp orig)
void tcg_gen_qemu_ld_i128(TCGv_i128 val, TCGv addr, TCGArg idx, MemOp memop)
{
MemOpIdx oi = make_memop_idx(memop, idx);
const MemOpIdx oi = make_memop_idx(memop, idx);
tcg_debug_assert((memop & MO_SIZE) == MO_128);
tcg_debug_assert((memop & MO_SIGN) == 0);
@ -3213,9 +3213,36 @@ void tcg_gen_qemu_ld_i128(TCGv_i128 val, TCGv addr, TCGArg idx, MemOp memop)
tcg_gen_req_mo(TCG_MO_LD_LD | TCG_MO_ST_LD);
addr = plugin_prep_mem_callbacks(addr);
/* TODO: allow the tcg backend to see the whole operation. */
/* TODO: For now, force 32-bit hosts to use the helper. */
if (TCG_TARGET_HAS_qemu_ldst_i128 && TCG_TARGET_REG_BITS == 64) {
TCGv_i64 lo, hi;
TCGArg addr_arg;
MemOpIdx adj_oi;
bool need_bswap = false;
if (use_two_i64_for_i128(memop)) {
if ((memop & MO_BSWAP) && !tcg_target_has_memory_bswap(memop)) {
lo = TCGV128_HIGH(val);
hi = TCGV128_LOW(val);
adj_oi = make_memop_idx(memop & ~MO_BSWAP, idx);
need_bswap = true;
} else {
lo = TCGV128_LOW(val);
hi = TCGV128_HIGH(val);
adj_oi = oi;
}
#if TARGET_LONG_BITS == 32
addr_arg = tcgv_i32_arg(addr);
#else
addr_arg = tcgv_i64_arg(addr);
#endif
tcg_gen_op4ii_i64(INDEX_op_qemu_ld_i128, lo, hi, addr_arg, adj_oi);
if (need_bswap) {
tcg_gen_bswap64_i64(lo, lo);
tcg_gen_bswap64_i64(hi, hi);
}
} else if (use_two_i64_for_i128(memop)) {
MemOp mop[2];
TCGv addr_p8;
TCGv_i64 x, y;
@ -3258,7 +3285,7 @@ void tcg_gen_qemu_ld_i128(TCGv_i128 val, TCGv addr, TCGArg idx, MemOp memop)
void tcg_gen_qemu_st_i128(TCGv_i128 val, TCGv addr, TCGArg idx, MemOp memop)
{
MemOpIdx oi = make_memop_idx(memop, idx);
const MemOpIdx oi = make_memop_idx(memop, idx);
tcg_debug_assert((memop & MO_SIZE) == MO_128);
tcg_debug_assert((memop & MO_SIGN) == 0);
@ -3266,9 +3293,39 @@ void tcg_gen_qemu_st_i128(TCGv_i128 val, TCGv addr, TCGArg idx, MemOp memop)
tcg_gen_req_mo(TCG_MO_ST_LD | TCG_MO_ST_ST);
addr = plugin_prep_mem_callbacks(addr);
/* TODO: allow the tcg backend to see the whole operation. */
/* TODO: For now, force 32-bit hosts to use the helper. */
if (use_two_i64_for_i128(memop)) {
if (TCG_TARGET_HAS_qemu_ldst_i128 && TCG_TARGET_REG_BITS == 64) {
TCGv_i64 lo, hi;
TCGArg addr_arg;
MemOpIdx adj_oi;
bool need_bswap = false;
if ((memop & MO_BSWAP) && !tcg_target_has_memory_bswap(memop)) {
lo = tcg_temp_new_i64();
hi = tcg_temp_new_i64();
tcg_gen_bswap64_i64(lo, TCGV128_HIGH(val));
tcg_gen_bswap64_i64(hi, TCGV128_LOW(val));
adj_oi = make_memop_idx(memop & ~MO_BSWAP, idx);
need_bswap = true;
} else {
lo = TCGV128_LOW(val);
hi = TCGV128_HIGH(val);
adj_oi = oi;
}
#if TARGET_LONG_BITS == 32
addr_arg = tcgv_i32_arg(addr);
#else
addr_arg = tcgv_i64_arg(addr);
#endif
tcg_gen_op4ii_i64(INDEX_op_qemu_st_i128, lo, hi, addr_arg, adj_oi);
if (need_bswap) {
tcg_temp_free_i64(lo);
tcg_temp_free_i64(hi);
}
} else if (use_two_i64_for_i128(memop)) {
MemOp mop[2];
TCGv addr_p8;
TCGv_i64 x, y;