diff options
| author | Anton Blanchard <anton@ozlabs.org> | 2019-05-09 10:35:45 +1000 |
|---|---|---|
| committer | David Gibson <david@gibson.dropbear.id.au> | 2019-05-29 11:39:45 +1000 |
| commit | e04c5dd139a319a97d50e29c0a84b5c630e6e740 (patch) | |
| tree | 791c22698b3de02c9b6c2f0b0d4e7b130ac7592c /target/ppc | |
| parent | f81d69fcea571af19de01377d2b474a675f573d6 (diff) | |
| download | qemu-e04c5dd139a319a97d50e29c0a84b5c630e6e740.zip qemu-e04c5dd139a319a97d50e29c0a84b5c630e6e740.tar.gz qemu-e04c5dd139a319a97d50e29c0a84b5c630e6e740.tar.bz2 | |
target/ppc: Optimise VSX_LOAD_SCALAR_DS and VSX_VECTOR_LOAD_STORE
A few small optimisations:
In VSX_LOAD_SCALAR_DS() we can don't need to read the VSR via
get_cpu_vsrh().
Split VSX_VECTOR_LOAD_STORE() into two functions. Loads only need to
write the VSRs (set_cpu_vsr*()) and stores only need to read the VSRs
(get_cpu_vsr*())
Thanks to Mark Cave-Ayland for the suggestions.
Signed-off-by: Anton Blanchard <anton@ozlabs.org>
Message-Id: <20190509103545.4a7fa71a@kryten>
Reviewed-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Diffstat (limited to 'target/ppc')
| -rw-r--r-- | target/ppc/translate/vsx-impl.inc.c | 68 |
1 files changed, 58 insertions, 10 deletions
diff --git a/target/ppc/translate/vsx-impl.inc.c b/target/ppc/translate/vsx-impl.inc.c index 4b8f6ce..c39829c 100644 --- a/target/ppc/translate/vsx-impl.inc.c +++ b/target/ppc/translate/vsx-impl.inc.c @@ -227,7 +227,7 @@ static void gen_lxvb16x(DisasContext *ctx) tcg_temp_free_i64(xtl); } -#define VSX_VECTOR_LOAD_STORE(name, op, indexed) \ +#define VSX_VECTOR_LOAD(name, op, indexed) \ static void gen_##name(DisasContext *ctx) \ { \ int xt; \ @@ -254,8 +254,6 @@ static void gen_##name(DisasContext *ctx) \ } \ xth = tcg_temp_new_i64(); \ xtl = tcg_temp_new_i64(); \ - get_cpu_vsrh(xth, xt); \ - get_cpu_vsrl(xtl, xt); \ gen_set_access_type(ctx, ACCESS_INT); \ EA = tcg_temp_new(); \ if (indexed) { \ @@ -281,10 +279,61 @@ static void gen_##name(DisasContext *ctx) \ tcg_temp_free_i64(xtl); \ } -VSX_VECTOR_LOAD_STORE(lxv, ld_i64, 0) -VSX_VECTOR_LOAD_STORE(stxv, st_i64, 0) -VSX_VECTOR_LOAD_STORE(lxvx, ld_i64, 1) -VSX_VECTOR_LOAD_STORE(stxvx, st_i64, 1) +VSX_VECTOR_LOAD(lxv, ld_i64, 0) +VSX_VECTOR_LOAD(lxvx, ld_i64, 1) + +#define VSX_VECTOR_STORE(name, op, indexed) \ +static void gen_##name(DisasContext *ctx) \ +{ \ + int xt; \ + TCGv EA; \ + TCGv_i64 xth; \ + TCGv_i64 xtl; \ + \ + if (indexed) { \ + xt = xT(ctx->opcode); \ + } else { \ + xt = DQxT(ctx->opcode); \ + } \ + \ + if (xt < 32) { \ + if (unlikely(!ctx->vsx_enabled)) { \ + gen_exception(ctx, POWERPC_EXCP_VSXU); \ + return; \ + } \ + } else { \ + if (unlikely(!ctx->altivec_enabled)) { \ + gen_exception(ctx, POWERPC_EXCP_VPU); \ + return; \ + } \ + } \ + xth = tcg_temp_new_i64(); \ + xtl = tcg_temp_new_i64(); \ + get_cpu_vsrh(xth, xt); \ + get_cpu_vsrl(xtl, xt); \ + gen_set_access_type(ctx, ACCESS_INT); \ + EA = tcg_temp_new(); \ + if (indexed) { \ + gen_addr_reg_index(ctx, EA); \ + } else { \ + gen_addr_imm_index(ctx, EA, 0x0F); \ + } \ + if (ctx->le_mode) { \ + tcg_gen_qemu_##op(xtl, EA, ctx->mem_idx, MO_LEQ); \ + tcg_gen_addi_tl(EA, EA, 8); \ + tcg_gen_qemu_##op(xth, EA, ctx->mem_idx, MO_LEQ); \ + } else { \ + tcg_gen_qemu_##op(xth, EA, ctx->mem_idx, MO_BEQ); \ + tcg_gen_addi_tl(EA, EA, 8); \ + tcg_gen_qemu_##op(xtl, EA, ctx->mem_idx, MO_BEQ); \ + } \ + tcg_temp_free(EA); \ + tcg_temp_free_i64(xth); \ + tcg_temp_free_i64(xtl); \ +} + +VSX_VECTOR_STORE(stxv, st_i64, 0) +VSX_VECTOR_STORE(stxvx, st_i64, 1) #ifdef TARGET_PPC64 #define VSX_VECTOR_LOAD_STORE_LENGTH(name) \ @@ -329,7 +378,6 @@ static void gen_##name(DisasContext *ctx) \ return; \ } \ xth = tcg_temp_new_i64(); \ - get_cpu_vsrh(xth, rD(ctx->opcode) + 32); \ gen_set_access_type(ctx, ACCESS_INT); \ EA = tcg_temp_new(); \ gen_addr_imm_index(ctx, EA, 0x03); \ @@ -513,8 +561,8 @@ static void gen_##name(DisasContext *ctx) \ tcg_temp_free_i64(xth); \ } -VSX_LOAD_SCALAR_DS(stxsd, st64_i64) -VSX_LOAD_SCALAR_DS(stxssp, st32fs) +VSX_STORE_SCALAR_DS(stxsd, st64_i64) +VSX_STORE_SCALAR_DS(stxssp, st32fs) static void gen_mfvsrwz(DisasContext *ctx) { |