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target-unicore32: Use mul*2 for do_mult

Browse Source 
Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This commit is contained in:
Richard Henderson 2013-02-19 23:52:24 -08:00 committed by Blue Swirl
parent 1d3b708491
commit d1f8cd8391
1 changed files with 10 additions and 71 deletions
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81
target-unicore32/translate.c
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@ -267,37 +267,6 @@ static void gen_exception(int excp)
dead_tmp(tmp);
}
/* FIXME: Most targets have native widening multiplication.
It would be good to use that instead of a full wide multiply. */
/* 32x32->64 multiply. Marks inputs as dead. */
static TCGv_i64 gen_mulu_i64_i32(TCGv a, TCGv b)
{
TCGv_i64 tmp1 = tcg_temp_new_i64();
TCGv_i64 tmp2 = tcg_temp_new_i64();
tcg_gen_extu_i32_i64(tmp1, a);
dead_tmp(a);
tcg_gen_extu_i32_i64(tmp2, b);
dead_tmp(b);
tcg_gen_mul_i64(tmp1, tmp1, tmp2);
tcg_temp_free_i64(tmp2);
return tmp1;
}
static TCGv_i64 gen_muls_i64_i32(TCGv a, TCGv b)
{
TCGv_i64 tmp1 = tcg_temp_new_i64();
TCGv_i64 tmp2 = tcg_temp_new_i64();
tcg_gen_ext_i32_i64(tmp1, a);
dead_tmp(a);
tcg_gen_ext_i32_i64(tmp2, b);
dead_tmp(b);
tcg_gen_mul_i64(tmp1, tmp1, tmp2);
tcg_temp_free_i64(tmp2);
return tmp1;
}
#define gen_set_CF(var) tcg_gen_st_i32(var, cpu_env, offsetof(CPUUniCore32State, CF))
/* Set CF to the top bit of var. */
@ -1219,38 +1188,6 @@ static void disas_coproc_insn(CPUUniCore32State *env, DisasContext *s,
}
}
/* Store a 64-bit value to a register pair. Clobbers val. */
static void gen_storeq_reg(DisasContext *s, int rlow, int rhigh, TCGv_i64 val)
{
TCGv tmp;
tmp = new_tmp();
tcg_gen_trunc_i64_i32(tmp, val);
store_reg(s, rlow, tmp);
tmp = new_tmp();
tcg_gen_shri_i64(val, val, 32);
tcg_gen_trunc_i64_i32(tmp, val);
store_reg(s, rhigh, tmp);
}
/* load and add a 64-bit value from a register pair. */
static void gen_addq(DisasContext *s, TCGv_i64 val, int rlow, int rhigh)
{
TCGv_i64 tmp;
TCGv tmpl;
TCGv tmph;
/* Load 64-bit value rd:rn. */
tmpl = load_reg(s, rlow);
tmph = load_reg(s, rhigh);
tmp = tcg_temp_new_i64();
tcg_gen_concat_i32_i64(tmp, tmpl, tmph);
dead_tmp(tmpl);
dead_tmp(tmph);
tcg_gen_add_i64(val, val, tmp);
tcg_temp_free_i64(tmp);
}
/* data processing instructions */
static void do_datap(CPUUniCore32State *env, DisasContext *s, uint32_t insn)
{
@ -1445,24 +1382,26 @@ static void do_datap(CPUUniCore32State *env, DisasContext *s, uint32_t insn)
/* multiply */
static void do_mult(CPUUniCore32State *env, DisasContext *s, uint32_t insn)
{
TCGv tmp;
TCGv tmp2;
TCGv_i64 tmp64;
TCGv tmp, tmp2, tmp3, tmp4;
if (UCOP_SET(27)) {
/* 64 bit mul */
tmp = load_reg(s, UCOP_REG_M);
tmp2 = load_reg(s, UCOP_REG_N);
if (UCOP_SET(26)) {
tmp64 = gen_muls_i64_i32(tmp, tmp2);
tcg_gen_muls2_i32(tmp, tmp2, tmp, tmp2);
} else {
tmp64 = gen_mulu_i64_i32(tmp, tmp2);
tcg_gen_mulu2_i32(tmp, tmp2, tmp, tmp2);
}
if (UCOP_SET(25)) { /* mult accumulate */
gen_addq(s, tmp64, UCOP_REG_LO, UCOP_REG_HI);
tmp3 = load_reg(s, UCOP_REG_LO);
tmp4 = load_reg(s, UCOP_REG_HI);
tcg_gen_add2_i32(tmp, tmp2, tmp, tmp2, tmp3, tmp4);
dead_tmp(tmp3);
dead_tmp(tmp4);
}
gen_storeq_reg(s, UCOP_REG_LO, UCOP_REG_HI, tmp64);
tcg_temp_free_i64(tmp64);
store_reg(s, UCOP_REG_LO, tmp);
store_reg(s, UCOP_REG_HI, tmp2);
} else {
/* 32 bit mul */
tmp = load_reg(s, UCOP_REG_M);