OpenE2K/qemu-e2k
13
4
Fork 0
Code Issues 4 Pull Requests Projects 2 Releases Activity

target-ppc: improve stxvw4x implementation

Browse Source 
Manipulate data and store 8bytes instead of 4bytes.

Vector (32-bit elements):
+----------+----------+----------+----------+
| 00112233 | 44556677 | 8899AABB | CCDDEEFF |
+----------+----------+----------+----------+

Store results in following:

Big-Endian Storage
+-------------+-------------+-------------+-------------+
| 00 11 22 33 | 44 55 66 77 | 88 99 AA BB | CC DD EE FF |
+-------------+-------------+-------------+-------------+

Little-Endian Storage
+-------------+-------------+-------------+-------------+
| 33 22 11 00 | 77 66 55 44 | BB AA 99 88 | FF EE DD CC |
+-------------+-------------+-------------+-------------+

Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Nikunj A Dadhania 2016-09-29 00:11:56 +05:30 committed by David Gibson
parent f34001ec96
commit 0aec21d8fa
1 changed files with 19 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

33
target-ppc/translate/vsx-impl.inc.c
View File

@ -146,7 +146,8 @@ static void gen_stxvd2x(DisasContext *ctx)
static void gen_stxvw4x(DisasContext *ctx)
{
TCGv_i64 tmp;
TCGv_i64 xsh = cpu_vsrh(xS(ctx->opcode));
TCGv_i64 xsl = cpu_vsrl(xS(ctx->opcode));
TCGv EA;
if (unlikely(!ctx->vsx_enabled)) {
gen_exception(ctx, POWERPC_EXCP_VSXU);
@ -155,21 +156,25 @@ static void gen_stxvw4x(DisasContext *ctx)
gen_set_access_type(ctx, ACCESS_INT);
EA = tcg_temp_new();
gen_addr_reg_index(ctx, EA);
tmp = tcg_temp_new_i64();
tcg_gen_shri_i64(tmp, cpu_vsrh(xS(ctx->opcode)), 32);
gen_qemu_st32_i64(ctx, tmp, EA);
tcg_gen_addi_tl(EA, EA, 4);
gen_qemu_st32_i64(ctx, cpu_vsrh(xS(ctx->opcode)), EA);
tcg_gen_shri_i64(tmp, cpu_vsrl(xS(ctx->opcode)), 32);
tcg_gen_addi_tl(EA, EA, 4);
gen_qemu_st32_i64(ctx, tmp, EA);
tcg_gen_addi_tl(EA, EA, 4);
gen_qemu_st32_i64(ctx, cpu_vsrl(xS(ctx->opcode)), EA);
if (ctx->le_mode) {
TCGv_i64 t0 = tcg_temp_new_i64();
TCGv_i64 t1 = tcg_temp_new_i64();
tcg_gen_shri_i64(t0, xsh, 32);
tcg_gen_deposit_i64(t1, t0, xsh, 32, 32);
tcg_gen_qemu_st_i64(t1, EA, ctx->mem_idx, MO_LEQ);
tcg_gen_addi_tl(EA, EA, 8);
tcg_gen_shri_i64(t0, xsl, 32);
tcg_gen_deposit_i64(t1, t0, xsl, 32, 32);
tcg_gen_qemu_st_i64(t1, EA, ctx->mem_idx, MO_LEQ);
tcg_temp_free_i64(t0);
tcg_temp_free_i64(t1);
} else {
tcg_gen_qemu_st_i64(xsh, EA, ctx->mem_idx, MO_BEQ);
tcg_gen_addi_tl(EA, EA, 8);
tcg_gen_qemu_st_i64(xsl, EA, ctx->mem_idx, MO_BEQ);
}
tcg_temp_free(EA);
tcg_temp_free_i64(tmp);
}
#define MV_VSRW(name, tcgop1, tcgop2, target, source) \