Commit a9c7d27b authored by Richard Henderson's avatar Richard Henderson
Browse files

tcg-sparc: Improve tcg_out_movi 



If bits 31:13 are zero, reduce the insn count by one.

Signed-off-by: default avatarRichard Henderson <rth@twiddle.net>
parent 1d0a6068

tcg/sparc/tcg-target.c

+31 −21
Original line number Diff line number Diff line
@@ -384,37 +384,47 @@ static inline void tcg_out_movi_imm13(TCGContext *s, int ret, uint32_t arg) 
    tcg_out_arithi(s, ret, TCG_REG_G0, arg, ARITH_OR);

}



static inline void tcg_out_movi_imm32(TCGContext *s, int ret, uint32_t arg)

static void tcg_out_movi(TCGContext *s, TCGType type,

                         TCGReg ret, tcg_target_long arg)

{

    if (check_fit_tl(arg, 13))

    tcg_target_long hi, lo;



    /* A 13-bit constant sign-extended to 64-bits.  */

    if (check_fit_tl(arg, 13)) {

        tcg_out_movi_imm13(s, ret, arg);

    else {

        return;

    }



    /* A 32-bit constant, or 32-bit zero-extended to 64-bits.  */

    if (TCG_TARGET_REG_BITS == 32

        || type == TCG_TYPE_I32

        || (arg & ~0xffffffffu) == 0) {

        tcg_out_sethi(s, ret, arg);

        if (arg & 0x3ff)

        if (arg & 0x3ff) {

            tcg_out_arithi(s, ret, ret, arg & 0x3ff, ARITH_OR);

        }

        return;

    }



static inline void tcg_out_movi(TCGContext *s, TCGType type,

                                TCGReg ret, tcg_target_long arg)

{

    /* All 32-bit constants, as well as 64-bit constants with

       no high bits set go through movi_imm32.  */

    if (TCG_TARGET_REG_BITS == 32

        || type == TCG_TYPE_I32

        || (arg & ~(tcg_target_long)0xffffffff) == 0) {

        tcg_out_movi_imm32(s, ret, arg);

    } else if (check_fit_tl(arg, 13)) {

        /* A 13-bit constant sign-extended to 64-bits.  */

        tcg_out_movi_imm13(s, ret, arg);

    } else if (check_fit_tl(arg, 32)) {

    /* A 32-bit constant sign-extended to 64-bits.  */

    if (check_fit_tl(arg, 32)) {

        tcg_out_sethi(s, ret, ~arg);

        tcg_out_arithi(s, ret, ret, (arg & 0x3ff) | -0x400, ARITH_XOR);

        return;

    }



    /* A 64-bit constant decomposed into 2 32-bit pieces.  */

    lo = (int32_t)arg;

    if (check_fit_tl(lo, 13)) {

        hi = (arg - lo) >> 31 >> 1;

        tcg_out_movi(s, TCG_TYPE_I32, ret, hi);

        tcg_out_arithi(s, ret, ret, 32, SHIFT_SLLX);

        tcg_out_arithi(s, ret, ret, lo, ARITH_ADD);

    } else {

        tcg_out_movi_imm32(s, ret, arg >> (TCG_TARGET_REG_BITS / 2));

        hi = arg >> 31 >> 1;

        tcg_out_movi(s, TCG_TYPE_I32, ret, hi);

        tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_T2, lo);

        tcg_out_arithi(s, ret, ret, 32, SHIFT_SLLX);

        tcg_out_movi_imm32(s, TCG_REG_T2, arg);

        tcg_out_arith(s, ret, ret, TCG_REG_T2, ARITH_OR);

    }

}