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softfloat: Implement the full set of comparisons for float16

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Implement them in softfloat and remove the local versions in riscv.

Signed-off-by: Kito Cheng <kito.cheng@sifive.com>
Signed-off-by: Chih-Min Chao <chihmin.chao@sifive.com>
Acked-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <1596102747-20226-2-git-send-email-chihmin.chao@sifive.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Kito Cheng 2020-07-30 02:52:22 -07:00 committed by Richard Henderson
parent ea1bb830cb
commit dd205025a0
2 changed files with 41 additions and 25 deletions
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41
include/fpu/softfloat.h
View File

@ -285,6 +285,47 @@ static inline float16 float16_set_sign(float16 a, int sign)
return make_float16((float16_val(a) & 0x7fff) | (sign << 15));
}
static inline bool float16_eq(float16 a, float16 b, float_status *s)
{
return float16_compare(a, b, s) == float_relation_equal;
}
static inline bool float16_le(float16 a, float16 b, float_status *s)
{
return float16_compare(a, b, s) <= float_relation_equal;
}
static inline bool float16_lt(float16 a, float16 b, float_status *s)
{
return float16_compare(a, b, s) < float_relation_equal;
}
static inline bool float16_unordered(float16 a, float16 b, float_status *s)
{
return float16_compare(a, b, s) == float_relation_unordered;
}
static inline bool float16_eq_quiet(float16 a, float16 b, float_status *s)
{
return float16_compare_quiet(a, b, s) == float_relation_equal;
}
static inline bool float16_le_quiet(float16 a, float16 b, float_status *s)
{
return float16_compare_quiet(a, b, s) <= float_relation_equal;
}
static inline bool float16_lt_quiet(float16 a, float16 b, float_status *s)
{
return float16_compare_quiet(a, b, s) < float_relation_equal;
}
static inline bool float16_unordered_quiet(float16 a, float16 b,
float_status *s)
{
return float16_compare_quiet(a, b, s) == float_relation_unordered;
}
#define float16_zero make_float16(0)
#define float16_half make_float16(0x3800)
#define float16_one make_float16(0x3c00)

25
target/riscv/vector_helper.c
View File

@ -3955,12 +3955,6 @@ void HELPER(NAME)(void *vd, void *v0, void *vs1, void *vs2, \
} \
}
static bool float16_eq_quiet(uint16_t a, uint16_t b, float_status *s)
{
FloatRelation compare = float16_compare_quiet(a, b, s);
return compare == float_relation_equal;
}
GEN_VEXT_CMP_VV_ENV(vmfeq_vv_h, uint16_t, H2, float16_eq_quiet)
GEN_VEXT_CMP_VV_ENV(vmfeq_vv_w, uint32_t, H4, float32_eq_quiet)
GEN_VEXT_CMP_VV_ENV(vmfeq_vv_d, uint64_t, H8, float64_eq_quiet)
@ -4017,12 +4011,6 @@ GEN_VEXT_CMP_VF(vmfne_vf_h, uint16_t, H2, vmfne16)
GEN_VEXT_CMP_VF(vmfne_vf_w, uint32_t, H4, vmfne32)
GEN_VEXT_CMP_VF(vmfne_vf_d, uint64_t, H8, vmfne64)
static bool float16_lt(uint16_t a, uint16_t b, float_status *s)
{
FloatRelation compare = float16_compare(a, b, s);
return compare == float_relation_less;
}
GEN_VEXT_CMP_VV_ENV(vmflt_vv_h, uint16_t, H2, float16_lt)
GEN_VEXT_CMP_VV_ENV(vmflt_vv_w, uint32_t, H4, float32_lt)
GEN_VEXT_CMP_VV_ENV(vmflt_vv_d, uint64_t, H8, float64_lt)
@ -4030,13 +4018,6 @@ GEN_VEXT_CMP_VF(vmflt_vf_h, uint16_t, H2, float16_lt)
GEN_VEXT_CMP_VF(vmflt_vf_w, uint32_t, H4, float32_lt)
GEN_VEXT_CMP_VF(vmflt_vf_d, uint64_t, H8, float64_lt)
static bool float16_le(uint16_t a, uint16_t b, float_status *s)
{
FloatRelation compare = float16_compare(a, b, s);
return compare == float_relation_less ||
compare == float_relation_equal;
}
GEN_VEXT_CMP_VV_ENV(vmfle_vv_h, uint16_t, H2, float16_le)
GEN_VEXT_CMP_VV_ENV(vmfle_vv_w, uint32_t, H4, float32_le)
GEN_VEXT_CMP_VV_ENV(vmfle_vv_d, uint64_t, H8, float64_le)
@ -4091,12 +4072,6 @@ GEN_VEXT_CMP_VF(vmfge_vf_h, uint16_t, H2, vmfge16)
GEN_VEXT_CMP_VF(vmfge_vf_w, uint32_t, H4, vmfge32)
GEN_VEXT_CMP_VF(vmfge_vf_d, uint64_t, H8, vmfge64)
static bool float16_unordered_quiet(uint16_t a, uint16_t b, float_status *s)
{
FloatRelation compare = float16_compare_quiet(a, b, s);
return compare == float_relation_unordered;
}
GEN_VEXT_CMP_VV_ENV(vmford_vv_h, uint16_t, H2, !float16_unordered_quiet)
GEN_VEXT_CMP_VV_ENV(vmford_vv_w, uint32_t, H4, !float32_unordered_quiet)
GEN_VEXT_CMP_VV_ENV(vmford_vv_d, uint64_t, H8, !float64_unordered_quiet)