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arm/translate-a64: add FP16 SCVTF/UCVFT to simd_two_reg_misc_fp16 

I've re-factored the handle_simd_intfp_conv helper to properly handle
half-precision as well as call plain conversion helpers when we are
not doing fixed point conversion.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180227143852.11175-21-alex.bennee@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Alex Bennée 2018-03-01 11:05:54 +00:00 committed by Peter Maydell
parent 7d4dd1a73a
commit 931931904c
3 changed files with 108 additions and 28 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
target/arm/helper.c
View File

@ -11302,8 +11302,10 @@ CONV_ITOF(vfp_##name##to##p, fsz, sign) \
CONV_FTOI(vfp_to##name##p, fsz, sign, ) \
CONV_FTOI(vfp_to##name##z##p, fsz, sign, _round_to_zero)
FLOAT_CONVS(si, h, 16, )
FLOAT_CONVS(si, s, 32, )
FLOAT_CONVS(si, d, 64, )
FLOAT_CONVS(ui, h, 16, u)
FLOAT_CONVS(ui, s, 32, u)
FLOAT_CONVS(ui, d, 64, u)
@ -11386,6 +11388,8 @@ VFP_CONV_FIX_A64(sq, s, 32, 64, int64)
VFP_CONV_FIX(uh, s, 32, 32, uint16)
VFP_CONV_FIX(ul, s, 32, 32, uint32)
VFP_CONV_FIX_A64(uq, s, 32, 64, uint64)
VFP_CONV_FIX_A64(sl, h, 16, 32, int32)
VFP_CONV_FIX_A64(ul, h, 16, 32, uint32)
#undef VFP_CONV_FIX
#undef VFP_CONV_FIX_FLOAT
#undef VFP_CONV_FLOAT_FIX_ROUND

10
target/arm/helper.h
View File

@ -120,17 +120,23 @@ DEF_HELPER_3(vfp_cmped, void, f64, f64, env)
DEF_HELPER_2(vfp_fcvtds, f64, f32, env)
DEF_HELPER_2(vfp_fcvtsd, f32, f64, env)
DEF_HELPER_2(vfp_uitoh, f16, i32, ptr)
DEF_HELPER_2(vfp_uitos, f32, i32, ptr)
DEF_HELPER_2(vfp_uitod, f64, i32, ptr)
DEF_HELPER_2(vfp_sitoh, f16, i32, ptr)
DEF_HELPER_2(vfp_sitos, f32, i32, ptr)
DEF_HELPER_2(vfp_sitod, f64, i32, ptr)
DEF_HELPER_2(vfp_touih, i32, f16, ptr)
DEF_HELPER_2(vfp_touis, i32, f32, ptr)
DEF_HELPER_2(vfp_touid, i32, f64, ptr)
DEF_HELPER_2(vfp_touizh, i32, f16, ptr)
DEF_HELPER_2(vfp_touizs, i32, f32, ptr)
DEF_HELPER_2(vfp_touizd, i32, f64, ptr)
DEF_HELPER_2(vfp_tosih, i32, f16, ptr)
DEF_HELPER_2(vfp_tosis, i32, f32, ptr)
DEF_HELPER_2(vfp_tosid, i32, f64, ptr)
DEF_HELPER_2(vfp_tosizh, i32, f16, ptr)
DEF_HELPER_2(vfp_tosizs, i32, f32, ptr)
DEF_HELPER_2(vfp_tosizd, i32, f64, ptr)
@ -142,6 +148,8 @@ DEF_HELPER_3(vfp_toshd_round_to_zero, i64, f64, i32, ptr)
DEF_HELPER_3(vfp_tosld_round_to_zero, i64, f64, i32, ptr)
DEF_HELPER_3(vfp_touhd_round_to_zero, i64, f64, i32, ptr)
DEF_HELPER_3(vfp_tould_round_to_zero, i64, f64, i32, ptr)
DEF_HELPER_3(vfp_toulh, i32, f16, i32, ptr)
DEF_HELPER_3(vfp_toslh, i32, f16, i32, ptr)
DEF_HELPER_3(vfp_toshs, i32, f32, i32, ptr)
DEF_HELPER_3(vfp_tosls, i32, f32, i32, ptr)
DEF_HELPER_3(vfp_tosqs, i64, f32, i32, ptr)
@ -166,6 +174,8 @@ DEF_HELPER_3(vfp_sqtod, f64, i64, i32, ptr)
DEF_HELPER_3(vfp_uhtod, f64, i64, i32, ptr)
DEF_HELPER_3(vfp_ultod, f64, i64, i32, ptr)
DEF_HELPER_3(vfp_uqtod, f64, i64, i32, ptr)
DEF_HELPER_3(vfp_sltoh, f16, i32, i32, ptr)
DEF_HELPER_3(vfp_ultoh, f16, i32, i32, ptr)
DEF_HELPER_FLAGS_2(set_rmode, TCG_CALL_NO_RWG, i32, i32, ptr)
DEF_HELPER_FLAGS_2(set_neon_rmode, TCG_CALL_NO_RWG, i32, i32, env)

122
target/arm/translate-a64.c
View File

@ -6902,23 +6902,28 @@ static void handle_simd_intfp_conv(DisasContext *s, int rd, int rn,
int elements, int is_signed,
int fracbits, int size)
{
bool is_double = size == 3 ? true : false;
TCGv_ptr tcg_fpst = get_fpstatus_ptr(false);
TCGv_i32 tcg_shift = tcg_const_i32(fracbits);
TCGv_i64 tcg_int = tcg_temp_new_i64();
TCGv_ptr tcg_fpst = get_fpstatus_ptr(size == MO_16);
TCGv_i32 tcg_shift = NULL;
TCGMemOp mop = size | (is_signed ? MO_SIGN : 0);
int pass;
for (pass = 0; pass < elements; pass++) {
read_vec_element(s, tcg_int, rn, pass, mop);
if (fracbits || size == MO_64) {
tcg_shift = tcg_const_i32(fracbits);
}
if (size == MO_64) {
TCGv_i64 tcg_int64 = tcg_temp_new_i64();
TCGv_i64 tcg_double = tcg_temp_new_i64();
for (pass = 0; pass < elements; pass++) {
read_vec_element(s, tcg_int64, rn, pass, mop);
if (is_double) {
TCGv_i64 tcg_double = tcg_temp_new_i64();
if (is_signed) {
gen_helper_vfp_sqtod(tcg_double, tcg_int,
gen_helper_vfp_sqtod(tcg_double, tcg_int64,
tcg_shift, tcg_fpst);
} else {
gen_helper_vfp_uqtod(tcg_double, tcg_int,
gen_helper_vfp_uqtod(tcg_double, tcg_int64,
tcg_shift, tcg_fpst);
}
if (elements == 1) {
@ -6926,28 +6931,72 @@ static void handle_simd_intfp_conv(DisasContext *s, int rd, int rn,
} else {
write_vec_element(s, tcg_double, rd, pass, MO_64);
}
tcg_temp_free_i64(tcg_double);
} else {
TCGv_i32 tcg_single = tcg_temp_new_i32();
if (is_signed) {
gen_helper_vfp_sqtos(tcg_single, tcg_int,
tcg_shift, tcg_fpst);
} else {
gen_helper_vfp_uqtos(tcg_single, tcg_int,
tcg_shift, tcg_fpst);
}
if (elements == 1) {
write_fp_sreg(s, rd, tcg_single);
} else {
write_vec_element_i32(s, tcg_single, rd, pass, MO_32);
}
tcg_temp_free_i32(tcg_single);
}
tcg_temp_free_i64(tcg_int64);
tcg_temp_free_i64(tcg_double);
} else {
TCGv_i32 tcg_int32 = tcg_temp_new_i32();
TCGv_i32 tcg_float = tcg_temp_new_i32();
for (pass = 0; pass < elements; pass++) {
read_vec_element_i32(s, tcg_int32, rn, pass, mop);
switch (size) {
case MO_32:
if (fracbits) {
if (is_signed) {
gen_helper_vfp_sltos(tcg_float, tcg_int32,
tcg_shift, tcg_fpst);
} else {
gen_helper_vfp_ultos(tcg_float, tcg_int32,
tcg_shift, tcg_fpst);
}
} else {
if (is_signed) {
gen_helper_vfp_sitos(tcg_float, tcg_int32, tcg_fpst);
} else {
gen_helper_vfp_uitos(tcg_float, tcg_int32, tcg_fpst);
}
}
break;
case MO_16:
if (fracbits) {
if (is_signed) {
gen_helper_vfp_sltoh(tcg_float, tcg_int32,
tcg_shift, tcg_fpst);
} else {
gen_helper_vfp_ultoh(tcg_float, tcg_int32,
tcg_shift, tcg_fpst);
}
} else {
if (is_signed) {
gen_helper_vfp_sitoh(tcg_float, tcg_int32, tcg_fpst);
} else {
gen_helper_vfp_uitoh(tcg_float, tcg_int32, tcg_fpst);
}
}
break;
default:
g_assert_not_reached();
}
if (elements == 1) {
write_fp_sreg(s, rd, tcg_float);
} else {
write_vec_element_i32(s, tcg_float, rd, pass, size);
}
}
tcg_temp_free_i32(tcg_int32);
tcg_temp_free_i32(tcg_float);
}
tcg_temp_free_i64(tcg_int);
tcg_temp_free_ptr(tcg_fpst);
tcg_temp_free_i32(tcg_shift);
if (tcg_shift) {
tcg_temp_free_i32(tcg_shift);
}
clear_vec_high(s, elements << size == 16, rd);
}
@ -11236,6 +11285,23 @@ static void disas_simd_two_reg_misc_fp16(DisasContext *s, uint32_t insn)
rn = extract32(insn, 5, 5);
switch (fpop) {
case 0x1d: /* SCVTF */
case 0x5d: /* UCVTF */
{
int elements;
if (is_scalar) {
elements = 1;
} else {
elements = (is_q ? 8 : 4);
}
if (!fp_access_check(s)) {
return;
}
handle_simd_intfp_conv(s, rd, rn, elements, !u, 0, MO_16);
return;
}
break;
case 0x2c: /* FCMGT (zero) */
case 0x2d: /* FCMEQ (zero) */