Message ID | 20210112093950.17530-13-frank.chang@sifive.com (mailing list archive) |
---|---|
State | New, archived |
Headers | show |
Series | support vector extension v1.0 | expand |
On Tue, Jan 12, 2021 at 1:46 AM <frank.chang@sifive.com> wrote: > > From: Frank Chang <frank.chang@sifive.com> > > Introduce the concepts of fractional LMUL for RVV 1.0. > In RVV 1.0, LMUL bits are contiguous in vtype register. > > Signed-off-by: Frank Chang <frank.chang@sifive.com> > Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Alistair > --- > target/riscv/cpu.h | 17 +++++++++-------- > target/riscv/translate.c | 16 ++++++++++++++-- > target/riscv/vector_helper.c | 16 ++++++++++++++-- > 3 files changed, 37 insertions(+), 12 deletions(-) > > diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h > index cd5c77114a4..3b985f6218d 100644 > --- a/target/riscv/cpu.h > +++ b/target/riscv/cpu.h > @@ -105,10 +105,10 @@ typedef struct CPURISCVState CPURISCVState; > > #define RV_VLEN_MAX 256 > > -FIELD(VTYPE, VLMUL, 0, 2) > -FIELD(VTYPE, VSEW, 2, 3) > -FIELD(VTYPE, VEDIV, 5, 2) > -FIELD(VTYPE, RESERVED, 7, sizeof(target_ulong) * 8 - 9) > +FIELD(VTYPE, VLMUL, 0, 3) > +FIELD(VTYPE, VSEW, 3, 3) > +FIELD(VTYPE, VEDIV, 8, 2) > +FIELD(VTYPE, RESERVED, 10, sizeof(target_ulong) * 8 - 11) > FIELD(VTYPE, VILL, sizeof(target_ulong) * 8 - 1, 1) > > struct CPURISCVState { > @@ -380,11 +380,12 @@ typedef RISCVCPU ArchCPU; > #include "exec/cpu-all.h" > > FIELD(TB_FLAGS, VL_EQ_VLMAX, 2, 1) > -FIELD(TB_FLAGS, LMUL, 3, 2) > -FIELD(TB_FLAGS, SEW, 5, 3) > -FIELD(TB_FLAGS, VILL, 8, 1) > +FIELD(TB_FLAGS, LMUL, 3, 3) > +FIELD(TB_FLAGS, SEW, 6, 3) > +/* Skip MSTATUS_VS (0x600) fields */ > +FIELD(TB_FLAGS, VILL, 11, 1) > /* Is a Hypervisor instruction load/store allowed? */ > -FIELD(TB_FLAGS, HLSX, 9, 1) > +FIELD(TB_FLAGS, HLSX, 12, 1) > > bool riscv_cpu_is_32bit(CPURISCVState *env); > > diff --git a/target/riscv/translate.c b/target/riscv/translate.c > index 18e198bf8a6..d9b3b37f698 100644 > --- a/target/riscv/translate.c > +++ b/target/riscv/translate.c > @@ -60,7 +60,19 @@ typedef struct DisasContext { > bool hlsx; > /* vector extension */ > bool vill; > - uint8_t lmul; > + /* > + * Encode LMUL to lmul as follows: > + * LMUL vlmul lmul > + * 1 000 0 > + * 2 001 1 > + * 4 010 2 > + * 8 011 3 > + * - 100 - > + * 1/8 101 -3 > + * 1/4 110 -2 > + * 1/2 111 -1 > + */ > + int8_t lmul; > uint8_t sew; > uint16_t vlen; > bool vl_eq_vlmax; > @@ -843,7 +855,7 @@ static void riscv_tr_init_disas_context(DisasContextBase *dcbase, CPUState *cs) > ctx->hlsx = FIELD_EX32(tb_flags, TB_FLAGS, HLSX); > ctx->vill = FIELD_EX32(tb_flags, TB_FLAGS, VILL); > ctx->sew = FIELD_EX32(tb_flags, TB_FLAGS, SEW); > - ctx->lmul = FIELD_EX32(tb_flags, TB_FLAGS, LMUL); > + ctx->lmul = sextract32(FIELD_EX32(tb_flags, TB_FLAGS, LMUL), 0, 3); > ctx->vl_eq_vlmax = FIELD_EX32(tb_flags, TB_FLAGS, VL_EQ_VLMAX); > } > > diff --git a/target/riscv/vector_helper.c b/target/riscv/vector_helper.c > index 12301e943e6..aa8348ea25a 100644 > --- a/target/riscv/vector_helper.c > +++ b/target/riscv/vector_helper.c > @@ -86,9 +86,21 @@ static inline uint32_t vext_vm(uint32_t desc) > return FIELD_EX32(simd_data(desc), VDATA, VM); > } > > -static inline uint32_t vext_lmul(uint32_t desc) > +/* > + * Encode LMUL to lmul as following: > + * LMUL vlmul lmul > + * 1 000 0 > + * 2 001 1 > + * 4 010 2 > + * 8 011 3 > + * - 100 - > + * 1/8 101 -3 > + * 1/4 110 -2 > + * 1/2 111 -1 > + */ > +static inline int32_t vext_lmul(uint32_t desc) > { > - return FIELD_EX32(simd_data(desc), VDATA, LMUL); > + return sextract32(FIELD_EX32(simd_data(desc), VDATA, LMUL), 0, 3); > } > > static uint32_t vext_wd(uint32_t desc) > -- > 2.17.1 > >
diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h index cd5c77114a4..3b985f6218d 100644 --- a/target/riscv/cpu.h +++ b/target/riscv/cpu.h @@ -105,10 +105,10 @@ typedef struct CPURISCVState CPURISCVState; #define RV_VLEN_MAX 256 -FIELD(VTYPE, VLMUL, 0, 2) -FIELD(VTYPE, VSEW, 2, 3) -FIELD(VTYPE, VEDIV, 5, 2) -FIELD(VTYPE, RESERVED, 7, sizeof(target_ulong) * 8 - 9) +FIELD(VTYPE, VLMUL, 0, 3) +FIELD(VTYPE, VSEW, 3, 3) +FIELD(VTYPE, VEDIV, 8, 2) +FIELD(VTYPE, RESERVED, 10, sizeof(target_ulong) * 8 - 11) FIELD(VTYPE, VILL, sizeof(target_ulong) * 8 - 1, 1) struct CPURISCVState { @@ -380,11 +380,12 @@ typedef RISCVCPU ArchCPU; #include "exec/cpu-all.h" FIELD(TB_FLAGS, VL_EQ_VLMAX, 2, 1) -FIELD(TB_FLAGS, LMUL, 3, 2) -FIELD(TB_FLAGS, SEW, 5, 3) -FIELD(TB_FLAGS, VILL, 8, 1) +FIELD(TB_FLAGS, LMUL, 3, 3) +FIELD(TB_FLAGS, SEW, 6, 3) +/* Skip MSTATUS_VS (0x600) fields */ +FIELD(TB_FLAGS, VILL, 11, 1) /* Is a Hypervisor instruction load/store allowed? */ -FIELD(TB_FLAGS, HLSX, 9, 1) +FIELD(TB_FLAGS, HLSX, 12, 1) bool riscv_cpu_is_32bit(CPURISCVState *env); diff --git a/target/riscv/translate.c b/target/riscv/translate.c index 18e198bf8a6..d9b3b37f698 100644 --- a/target/riscv/translate.c +++ b/target/riscv/translate.c @@ -60,7 +60,19 @@ typedef struct DisasContext { bool hlsx; /* vector extension */ bool vill; - uint8_t lmul; + /* + * Encode LMUL to lmul as follows: + * LMUL vlmul lmul + * 1 000 0 + * 2 001 1 + * 4 010 2 + * 8 011 3 + * - 100 - + * 1/8 101 -3 + * 1/4 110 -2 + * 1/2 111 -1 + */ + int8_t lmul; uint8_t sew; uint16_t vlen; bool vl_eq_vlmax; @@ -843,7 +855,7 @@ static void riscv_tr_init_disas_context(DisasContextBase *dcbase, CPUState *cs) ctx->hlsx = FIELD_EX32(tb_flags, TB_FLAGS, HLSX); ctx->vill = FIELD_EX32(tb_flags, TB_FLAGS, VILL); ctx->sew = FIELD_EX32(tb_flags, TB_FLAGS, SEW); - ctx->lmul = FIELD_EX32(tb_flags, TB_FLAGS, LMUL); + ctx->lmul = sextract32(FIELD_EX32(tb_flags, TB_FLAGS, LMUL), 0, 3); ctx->vl_eq_vlmax = FIELD_EX32(tb_flags, TB_FLAGS, VL_EQ_VLMAX); } diff --git a/target/riscv/vector_helper.c b/target/riscv/vector_helper.c index 12301e943e6..aa8348ea25a 100644 --- a/target/riscv/vector_helper.c +++ b/target/riscv/vector_helper.c @@ -86,9 +86,21 @@ static inline uint32_t vext_vm(uint32_t desc) return FIELD_EX32(simd_data(desc), VDATA, VM); } -static inline uint32_t vext_lmul(uint32_t desc) +/* + * Encode LMUL to lmul as following: + * LMUL vlmul lmul + * 1 000 0 + * 2 001 1 + * 4 010 2 + * 8 011 3 + * - 100 - + * 1/8 101 -3 + * 1/4 110 -2 + * 1/2 111 -1 + */ +static inline int32_t vext_lmul(uint32_t desc) { - return FIELD_EX32(simd_data(desc), VDATA, LMUL); + return sextract32(FIELD_EX32(simd_data(desc), VDATA, LMUL), 0, 3); } static uint32_t vext_wd(uint32_t desc)