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target/arm: Implement MVE VCVT between fp and integer 

Implement the MVE "VCVT (between floating-point and integer)" insn.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Peter Maydell 2021-09-01 09:02:38 +01:00
parent 2a4b939cf8
commit 2ec0dcf034
2 changed files with 39 additions and 0 deletions

7
target/arm/mve.decode
View File

@ -798,3 +798,10 @@ VCVT_UF_fixed 1111 1111 1 . ...... ... 0 11 . 0 01 . 1 ... 0 @vcvt
VCVT_FS_fixed 1110 1111 1 . ...... ... 0 11 . 1 01 . 1 ... 0 @vcvt
VCVT_FU_fixed 1111 1111 1 . ...... ... 0 11 . 1 01 . 1 ... 0 @vcvt
# VCVT between floating point and integer (halfprec and single);
# VCVT_<from><to>, S = signed int, U = unsigned int, F = float
VCVT_SF 1111 1111 1 . 11 .. 11 ... 0 011 00 1 . 0 ... 0 @1op
VCVT_UF 1111 1111 1 . 11 .. 11 ... 0 011 01 1 . 0 ... 0 @1op
VCVT_FS 1111 1111 1 . 11 .. 11 ... 0 011 10 1 . 0 ... 0 @1op
VCVT_FU 1111 1111 1 . 11 .. 11 ... 0 011 11 1 . 0 ... 0 @1op

32
target/arm/translate-mve.c
View File

@ -543,6 +543,38 @@ DO_1OP(VQNEG, vqneg)
DO_1OP(VMAXA, vmaxa)
DO_1OP(VMINA, vmina)
/*
* For simple float/int conversions we use the fixed-point
* conversion helpers with a zero shift count
*/
#define DO_VCVT(INSN, HFN, SFN) \
static void gen_##INSN##h(TCGv_ptr env, TCGv_ptr qd, TCGv_ptr qm) \
{ \
gen_helper_mve_##HFN(env, qd, qm, tcg_constant_i32(0)); \
} \
static void gen_##INSN##s(TCGv_ptr env, TCGv_ptr qd, TCGv_ptr qm) \
{ \
gen_helper_mve_##SFN(env, qd, qm, tcg_constant_i32(0)); \
} \
static bool trans_##INSN(DisasContext *s, arg_1op *a) \
{ \
static MVEGenOneOpFn * const fns[] = { \
NULL, \
gen_##INSN##h, \
gen_##INSN##s, \
NULL, \
}; \
if (!dc_isar_feature(aa32_mve_fp, s)) { \
return false; \
} \
return do_1op(s, a, fns[a->size]); \
}
DO_VCVT(VCVT_SF, vcvt_sh, vcvt_sf)
DO_VCVT(VCVT_UF, vcvt_uh, vcvt_uf)
DO_VCVT(VCVT_FS, vcvt_hs, vcvt_fs)
DO_VCVT(VCVT_FU, vcvt_hu, vcvt_fu)
/* Narrowing moves: only size 0 and 1 are valid */
#define DO_VMOVN(INSN, FN) \
static bool trans_##INSN(DisasContext *s, arg_1op *a) \