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arm/translate-a64: add FP16 F[A]C[EQ/GE/GT] to simd_three_reg_same_fp16 

These use the generic float16_compare functionality which in turn uses
the common float_compare code from the softfloat re-factor.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180227143852.11175-11-alex.bennee@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Alex Bennée 2018-03-01 11:05:49 +00:00 committed by Peter Maydell
parent 372087348d
commit d32adeae1a
3 changed files with 69 additions and 0 deletions
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49
target/arm/helper-a64.c
View File

@ -594,3 +594,52 @@ ADVSIMD_HALFOP(min)
ADVSIMD_HALFOP(max)
ADVSIMD_HALFOP(minnum)
ADVSIMD_HALFOP(maxnum)
/*
* Floating point comparisons produce an integer result. Softfloat
* routines return float_relation types which we convert to the 0/-1
* Neon requires.
*/
#define ADVSIMD_CMPRES(test) (test) ? 0xffff : 0
uint32_t HELPER(advsimd_ceq_f16)(float16 a, float16 b, void *fpstp)
{
float_status *fpst = fpstp;
int compare = float16_compare_quiet(a, b, fpst);
return ADVSIMD_CMPRES(compare == float_relation_equal);
}
uint32_t HELPER(advsimd_cge_f16)(float16 a, float16 b, void *fpstp)
{
float_status *fpst = fpstp;
int compare = float16_compare(a, b, fpst);
return ADVSIMD_CMPRES(compare == float_relation_greater ||
compare == float_relation_equal);
}
uint32_t HELPER(advsimd_cgt_f16)(float16 a, float16 b, void *fpstp)
{
float_status *fpst = fpstp;
int compare = float16_compare(a, b, fpst);
return ADVSIMD_CMPRES(compare == float_relation_greater);
}
uint32_t HELPER(advsimd_acge_f16)(float16 a, float16 b, void *fpstp)
{
float_status *fpst = fpstp;
float16 f0 = float16_abs(a);
float16 f1 = float16_abs(b);
int compare = float16_compare(f0, f1, fpst);
return ADVSIMD_CMPRES(compare == float_relation_greater ||
compare == float_relation_equal);
}
uint32_t HELPER(advsimd_acgt_f16)(float16 a, float16 b, void *fpstp)
{
float_status *fpst = fpstp;
float16 f0 = float16_abs(a);
float16 f1 = float16_abs(b);
int compare = float16_compare(f0, f1, fpst);
return ADVSIMD_CMPRES(compare == float_relation_greater);
}

5
target/arm/helper-a64.h
View File

@ -56,3 +56,8 @@ DEF_HELPER_3(advsimd_addh, f16, f16, f16, ptr)
DEF_HELPER_3(advsimd_subh, f16, f16, f16, ptr)
DEF_HELPER_3(advsimd_mulh, f16, f16, f16, ptr)
DEF_HELPER_3(advsimd_divh, f16, f16, f16, ptr)
DEF_HELPER_3(advsimd_ceq_f16, i32, f16, f16, ptr)
DEF_HELPER_3(advsimd_cge_f16, i32, f16, f16, ptr)
DEF_HELPER_3(advsimd_cgt_f16, i32, f16, f16, ptr)
DEF_HELPER_3(advsimd_acge_f16, i32, f16, f16, ptr)
DEF_HELPER_3(advsimd_acgt_f16, i32, f16, f16, ptr)

15
target/arm/translate-a64.c
View File

@ -10289,6 +10289,9 @@ static void disas_simd_three_reg_same_fp16(DisasContext *s, uint32_t insn)
case 0x2: /* FADD */
gen_helper_advsimd_addh(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x4: /* FCMEQ */
gen_helper_advsimd_ceq_f16(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x6: /* FMAX */
gen_helper_advsimd_maxh(tcg_res, tcg_op1, tcg_op2, fpst);
break;
@ -10304,6 +10307,12 @@ static void disas_simd_three_reg_same_fp16(DisasContext *s, uint32_t insn)
case 0x13: /* FMUL */
gen_helper_advsimd_mulh(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x14: /* FCMGE */
gen_helper_advsimd_cge_f16(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x15: /* FACGE */
gen_helper_advsimd_acge_f16(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x17: /* FDIV */
gen_helper_advsimd_divh(tcg_res, tcg_op1, tcg_op2, fpst);
break;
@ -10311,6 +10320,12 @@ static void disas_simd_three_reg_same_fp16(DisasContext *s, uint32_t insn)
gen_helper_advsimd_subh(tcg_res, tcg_op1, tcg_op2, fpst);
tcg_gen_andi_i32(tcg_res, tcg_res, 0x7fff);
break;
case 0x1c: /* FCMGT */
gen_helper_advsimd_cgt_f16(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x1d: /* FACGT */
gen_helper_advsimd_acgt_f16(tcg_res, tcg_op1, tcg_op2, fpst);
break;
default:
fprintf(stderr, "%s: insn %#04x, fpop %#2x @ %#" PRIx64 "\n",
__func__, insn, fpopcode, s->pc);