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| author | Aurelien Jarno <aurelien@aurel32.net> | 2012-10-19 23:48:13 +0200 |
|---|---|---|
| committer | Aurelien Jarno <aurelien@aurel32.net> | 2012-10-30 00:34:48 +0100 |
| commit | 3585317f6fdff0e3ae082f88afb2784d815a07e2 (patch) | |
| tree | 3b67c9df344e044ae35fbdbdf693cd55c158e613 /tcg | |
| parent | d26a8caea3f160782841efb87b5e8bea606b512b (diff) | |
| download | qemu-3585317f6fdff0e3ae082f88afb2784d815a07e2.zip qemu-3585317f6fdff0e3ae082f88afb2784d815a07e2.tar.gz qemu-3585317f6fdff0e3ae082f88afb2784d815a07e2.tar.bz2 | |
tcg/mips: use MUL instead of MULT on MIPS32 and above
MIPS32 and later instruction sets have a multiplication instruction
directly operating on GPRs. It only produces a 32-bit result but
it is exactly what is needed by QEMU.
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Diffstat (limited to 'tcg')
| -rw-r--r-- | tcg/mips/tcg-target.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/tcg/mips/tcg-target.c b/tcg/mips/tcg-target.c index 7e4013e..ae2b274 100644 --- a/tcg/mips/tcg-target.c +++ b/tcg/mips/tcg-target.c @@ -323,6 +323,9 @@ enum { OPC_BLTZ = OPC_REGIMM | (0x00 << 16), OPC_BGEZ = OPC_REGIMM | (0x01 << 16), + OPC_SPECIAL2 = 0x1c << 26, + OPC_MUL = OPC_SPECIAL2 | 0x002, + OPC_SPECIAL3 = 0x1f << 26, OPC_INS = OPC_SPECIAL3 | 0x004, OPC_WSBH = OPC_SPECIAL3 | 0x0a0, @@ -1403,8 +1406,12 @@ static inline void tcg_out_op(TCGContext *s, TCGOpcode opc, tcg_out_mov(s, TCG_TYPE_I32, args[0], TCG_REG_AT); break; case INDEX_op_mul_i32: +#if defined(__mips_isa_rev) && (__mips_isa_rev >= 1) + tcg_out_opc_reg(s, OPC_MUL, args[0], args[1], args[2]); +#else tcg_out_opc_reg(s, OPC_MULT, 0, args[1], args[2]); tcg_out_opc_reg(s, OPC_MFLO, args[0], 0, 0); +#endif break; case INDEX_op_mulu2_i32: tcg_out_opc_reg(s, OPC_MULTU, 0, args[2], args[3]); |