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| author | Richard Henderson <richard.henderson@linaro.org> | 2021-06-13 14:15:41 -0400 |
|---|---|---|
| committer | Richard Henderson <richard.henderson@linaro.org> | 2021-06-29 10:04:57 -0700 |
| commit | 1619ee9e93ed8f7bbbae61b946c56bd34713d4ac (patch) | |
| tree | d7105912ffb1d761e3348a0e422e3c80c8cf1d88 /tcg/s390 | |
| parent | 780b573fcec68bd35878e886bea418c2b74f1fe5 (diff) | |
| download | qemu-1619ee9e93ed8f7bbbae61b946c56bd34713d4ac.zip qemu-1619ee9e93ed8f7bbbae61b946c56bd34713d4ac.tar.gz qemu-1619ee9e93ed8f7bbbae61b946c56bd34713d4ac.tar.bz2 | |
tcg/s390: Support bswap flags
For INDEX_op_bswap16_i64, use 64-bit instructions so that we can
easily provide the extension to 64-bits. Drop the special case,
previously used, where the input is already zero-extended -- the
minor code size savings is not worth the complication.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Diffstat (limited to 'tcg/s390')
| -rw-r--r-- | tcg/s390/tcg-target.c.inc | 34 |
1 files changed, 28 insertions, 6 deletions
diff --git a/tcg/s390/tcg-target.c.inc b/tcg/s390/tcg-target.c.inc index 5fe073f..b82cf19 100644 --- a/tcg/s390/tcg-target.c.inc +++ b/tcg/s390/tcg-target.c.inc @@ -1951,15 +1951,37 @@ static inline void tcg_out_op(TCGContext *s, TCGOpcode opc, tgen_ext16u(s, TCG_TYPE_I32, args[0], args[1]); break; - OP_32_64(bswap16): - /* The TCG bswap definition requires bits 0-47 already be zero. - Thus we don't need the G-type insns to implement bswap16_i64. */ - tcg_out_insn(s, RRE, LRVR, args[0], args[1]); - tcg_out_sh32(s, RS_SRL, args[0], TCG_REG_NONE, 16); + case INDEX_op_bswap16_i32: + a0 = args[0], a1 = args[1], a2 = args[2]; + tcg_out_insn(s, RRE, LRVR, a0, a1); + if (a2 & TCG_BSWAP_OS) { + tcg_out_sh32(s, RS_SRA, a0, TCG_REG_NONE, 16); + } else { + tcg_out_sh32(s, RS_SRL, a0, TCG_REG_NONE, 16); + } + break; + case INDEX_op_bswap16_i64: + a0 = args[0], a1 = args[1], a2 = args[2]; + tcg_out_insn(s, RRE, LRVGR, a0, a1); + if (a2 & TCG_BSWAP_OS) { + tcg_out_sh64(s, RSY_SRAG, a0, a0, TCG_REG_NONE, 48); + } else { + tcg_out_sh64(s, RSY_SRLG, a0, a0, TCG_REG_NONE, 48); + } break; - OP_32_64(bswap32): + + case INDEX_op_bswap32_i32: tcg_out_insn(s, RRE, LRVR, args[0], args[1]); break; + case INDEX_op_bswap32_i64: + a0 = args[0], a1 = args[1], a2 = args[2]; + tcg_out_insn(s, RRE, LRVR, a0, a1); + if (a2 & TCG_BSWAP_OS) { + tgen_ext32s(s, a0, a0); + } else if ((a2 & (TCG_BSWAP_IZ | TCG_BSWAP_OZ)) == TCG_BSWAP_OZ) { + tgen_ext32u(s, a0, a0); + } + break; case INDEX_op_add2_i32: if (const_args[4]) { |