From 3585317f6fdff0e3ae082f88afb2784d815a07e2 Mon Sep 17 00:00:00 2001 From: Aurelien Jarno Date: Fri, 19 Oct 2012 23:48:13 +0200 Subject: [PATCH] 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 Signed-off-by: Aurelien Jarno --- tcg/mips/tcg-target.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/tcg/mips/tcg-target.c b/tcg/mips/tcg-target.c index 7e4013e1e6..ae2b274d85 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]); -- GitLab