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target/ppc: Implement Vector Insert Word from GPR using Immediate insns 

Implements the following PowerISA v3.1 instructions:
vinsw: Vector Insert Word from GPR using immediate-specified index
vinsd: Vector Insert Doubleword from GPR using immediate-specified
       index

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Matheus Ferst <matheus.ferst@eldorado.org.br>
Message-Id: <20211104123719.323713-7-matheus.ferst@eldorado.org.br>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Matheus Ferst 2021-11-04 09:37:00 -03:00 committed by David Gibson
parent 2cc12af399
commit 23832ae6d5
2 changed files with 43 additions and 0 deletions
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6
target/ppc/insn32.decode
View File

@ -44,6 +44,9 @@
&VX vrt vra vrb
@VX ...... vrt:5 vra:5 vrb:5 .......... . &VX
&VX_uim4 vrt uim vrb
@VX_uim4 ...... vrt:5 . uim:4 vrb:5 ........... &VX_uim4
&X rt ra rb
@X ...... rt:5 ra:5 rb:5 .......... . &X
@ -353,5 +356,8 @@ VINSWRX 000100 ..... ..... ..... 01110001111 @VX
VINSDLX 000100 ..... ..... ..... 01011001111 @VX
VINSDRX 000100 ..... ..... ..... 01111001111 @VX
VINSW 000100 ..... - .... ..... 00011001111 @VX_uim4
VINSD 000100 ..... - .... ..... 00111001111 @VX_uim4
VSLDBI 000100 ..... ..... ..... 00 ... 010110 @VN
VSRDBI 000100 ..... ..... ..... 01 ... 010110 @VN

37
target/ppc/translate/vmx-impl.c.inc
View File

@ -1278,6 +1278,40 @@ static bool do_vinsx_VX(DisasContext *ctx, arg_VX *a, int size, bool right,
return ok;
}
static bool do_vins_VX_uim4(DisasContext *ctx, arg_VX_uim4 *a, int size,
void (*gen_helper)(TCGv_ptr, TCGv_ptr, TCGv_i64, TCGv))
{
bool ok;
TCGv_i64 val;
REQUIRE_INSNS_FLAGS2(ctx, ISA310);
REQUIRE_VECTOR(ctx);
if (a->uim > (16 - size)) {
/*
* PowerISA v3.1 says that the resulting value is undefined in this
* case, so just log a guest error and leave VRT unchanged. The
* real hardware would do a partial insert, e.g. if VRT is zeroed and
* RB is 0x12345678, executing "vinsw VRT,RB,14" results in
* VRT = 0x0000...00001234, but we don't bother to reproduce this
* behavior as software shouldn't rely on it.
*/
qemu_log_mask(LOG_GUEST_ERROR, "Invalid index for VINS* at"
" 0x" TARGET_FMT_lx ", UIM = %d > %d\n", ctx->cia, a->uim,
16 - size);
return true;
}
val = tcg_temp_new_i64();
tcg_gen_extu_tl_i64(val, cpu_gpr[a->vrb]);
ok = do_vinsx(ctx, a->vrt, size, false, tcg_constant_tl(a->uim), val,
gen_helper);
tcg_temp_free_i64(val);
return ok;
}
TRANS(VINSBLX, do_vinsx_VX, 1, false, gen_helper_VINSBLX)
TRANS(VINSHLX, do_vinsx_VX, 2, false, gen_helper_VINSHLX)
TRANS(VINSWLX, do_vinsx_VX, 4, false, gen_helper_VINSWLX)
@ -1288,6 +1322,9 @@ TRANS(VINSHRX, do_vinsx_VX, 2, true, gen_helper_VINSHLX)
TRANS(VINSWRX, do_vinsx_VX, 4, true, gen_helper_VINSWLX)
TRANS(VINSDRX, do_vinsx_VX, 8, true, gen_helper_VINSDLX)
TRANS(VINSW, do_vins_VX_uim4, 4, gen_helper_VINSWLX)
TRANS(VINSD, do_vins_VX_uim4, 8, gen_helper_VINSDLX)
static void gen_vsldoi(DisasContext *ctx)
{
TCGv_ptr ra, rb, rd;