motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-04 00:03:54 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

target/arm: Implement fp16 for VCEQ, VCGE, VCGT comparisons

Browse source 
Convert the Neon floating-point vector comparison ops VCEQ,
VCGE and VCGT over to using a gvec helper and use this to
implement the fp16 case.

(We put the float16_ceq() etc functions above the DO_2OP()
macro definition because later when we convert the
compare-against-zero instructions we'll want their
definitions to be visible at that point in the source file.)

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20200828183354.27913-27-peter.maydell@linaro.org
This commit is contained in:
Peter Maydell 2020-08-28 19:33:35 +01:00
parent 2b70d8cd09
commit ad505db233
3 changed files with 56 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

44
target/arm/vec_helper.c
View file

@ -656,6 +656,41 @@ void HELPER(gvec_fcmlad)(void *vd, void *vn, void *vm,
clear_tail(d, opr_sz, simd_maxsz(desc));
}
/*
* Floating point comparisons producing an integer result (all 1s or all 0s).
* Note that EQ doesn't signal InvalidOp for QNaNs but GE and GT do.
* Softfloat routines return 0/1, which we convert to the 0/-1 Neon requires.
*/
static uint16_t float16_ceq(float16 op1, float16 op2, float_status *stat)
{
return -float16_eq_quiet(op1, op2, stat);
}
static uint32_t float32_ceq(float32 op1, float32 op2, float_status *stat)
{
return -float32_eq_quiet(op1, op2, stat);
}
static uint16_t float16_cge(float16 op1, float16 op2, float_status *stat)
{
return -float16_le(op2, op1, stat);
}
static uint32_t float32_cge(float32 op1, float32 op2, float_status *stat)
{
return -float32_le(op2, op1, stat);
}
static uint16_t float16_cgt(float16 op1, float16 op2, float_status *stat)
{
return -float16_lt(op2, op1, stat);
}
static uint32_t float32_cgt(float32 op1, float32 op2, float_status *stat)
{
return -float32_lt(op2, op1, stat);
}
#define DO_2OP(NAME, FUNC, TYPE) \
void HELPER(NAME)(void *vd, void *vn, void *stat, uint32_t desc) \
{ \
@ -747,6 +782,15 @@ DO_3OP(gvec_ftsmul_d, float64_ftsmul, float64)
DO_3OP(gvec_fabd_h, float16_abd, float16)
DO_3OP(gvec_fabd_s, float32_abd, float32)
DO_3OP(gvec_fceq_h, float16_ceq, float16)
DO_3OP(gvec_fceq_s, float32_ceq, float32)
DO_3OP(gvec_fcge_h, float16_cge, float16)
DO_3OP(gvec_fcge_s, float32_cge, float32)
DO_3OP(gvec_fcgt_h, float16_cgt, float16)
DO_3OP(gvec_fcgt_s, float32_cgt, float32)
#ifdef TARGET_AARCH64
DO_3OP(gvec_recps_h, helper_recpsf_f16, float16)