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target/sparc: optimize gen_op_mulscc() using deposit op 

Suggested-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20170718045540.16322-9-f4bug@amsat.org>
Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Philippe Mathieu-Daudé 2017-07-18 01:55:38 -03:00 committed by Richard Henderson
parent 0b1183e315
commit 08d64e0db0
1 changed files with 1 additions and 4 deletions
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5
target/sparc/translate.c
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@ -632,11 +632,8 @@ static inline void gen_op_mulscc(TCGv dst, TCGv src1, TCGv src2)
// b2 = T0 & 1;
// env->y = (b2 << 31) | (env->y >> 1);
tcg_gen_andi_tl(r_temp, cpu_cc_src, 0x1);
tcg_gen_shli_tl(r_temp, r_temp, 31);
tcg_gen_extract_tl(t0, cpu_y, 1, 31);
tcg_gen_or_tl(t0, t0, r_temp);
tcg_gen_andi_tl(cpu_y, t0, 0xffffffff);
tcg_gen_deposit_tl(cpu_y, t0, cpu_cc_src, 31, 1);
// b1 = N ^ V;
gen_mov_reg_N(t0, cpu_psr);