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target/loongarch: Add floating point comparison instruction translation

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This includes:
- FCMP.cond.{S/D}

Signed-off-by: Song Gao <gaosong@loongson.cn>
Signed-off-by: Xiaojuan Yang <yangxiaojuan@loongson.cn>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220606124333.2060567-12-yangxiaojuan@loongson.cn>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Song Gao 2022-06-06 20:43:01 +08:00 • committed by Richard Henderson
parent d578ca6cbb
commit 9b7410763a
6 changed files with 139 additions and 0 deletions
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60
target/loongarch/fpu_helper.c
View file

@ -401,3 +401,63 @@ uint64_t helper_fmuladd_d(CPULoongArchState *env, uint64_t fj,
update_fcsr0(env, GETPC());
return fd;
}
static uint64_t fcmp_common(CPULoongArchState *env, FloatRelation cmp,
uint32_t flags)
{
bool ret;
switch (cmp) {
case float_relation_less:
ret = (flags & FCMP_LT);
break;
case float_relation_equal:
ret = (flags & FCMP_EQ);
break;
case float_relation_greater:
ret = (flags & FCMP_GT);
break;
case float_relation_unordered:
ret = (flags & FCMP_UN);
break;
default:
g_assert_not_reached();
}
update_fcsr0(env, GETPC());
return ret;
}
/* fcmp_cXXX_s */
uint64_t helper_fcmp_c_s(CPULoongArchState *env, uint64_t fj,
uint64_t fk, uint32_t flags)
{
FloatRelation cmp = float32_compare_quiet((uint32_t)fj,
(uint32_t)fk, &env->fp_status);
return fcmp_common(env, cmp, flags);
}
/* fcmp_sXXX_s */
uint64_t helper_fcmp_s_s(CPULoongArchState *env, uint64_t fj,
uint64_t fk, uint32_t flags)
{
FloatRelation cmp = float32_compare((uint32_t)fj,
(uint32_t)fk, &env->fp_status);
return fcmp_common(env, cmp, flags);
}
/* fcmp_cXXX_d */
uint64_t helper_fcmp_c_d(CPULoongArchState *env, uint64_t fj,
uint64_t fk, uint32_t flags)
{
FloatRelation cmp = float64_compare_quiet(fj, fk, &env->fp_status);
return fcmp_common(env, cmp, flags);
}
/* fcmp_sXXX_d */
uint64_t helper_fcmp_s_d(CPULoongArchState *env, uint64_t fj,
uint64_t fk, uint32_t flags)
{
FloatRelation cmp = float64_compare(fj, fk, &env->fp_status);
return fcmp_common(env, cmp, flags);
}