sim-card
/
qemu
Archived
10
0
Fork 0
Code Releases Activity

target-ppc: optimize slw/srw/sld/srd 

Remove a temp local variable and a jump by computing a mask with shifts.

Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Aurelien Jarno 2009-09-18 16:56:30 +02:00
parent 155a8ad308
commit 7fd6bf7dae
1 changed files with 49 additions and 49 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

98
target-ppc/translate.c
View File

@ -1786,21 +1786,24 @@ GEN_PPC64_R4(rldimi, 0x1E, 0x06);
/* slw & slw. */
static void gen_slw(DisasContext *ctx)
{
TCGv t0;
int l1, l2;
l1 = gen_new_label();
l2 = gen_new_label();
TCGv t0, t1;
t0 = tcg_temp_local_new();
tcg_gen_andi_tl(t0, cpu_gpr[rB(ctx->opcode)], 0x3f);
tcg_gen_brcondi_tl(TCG_COND_LT, t0, 0x20, l1);
tcg_gen_movi_tl(cpu_gpr[rA(ctx->opcode)], 0);
tcg_gen_br(l2);
gen_set_label(l1);
tcg_gen_shl_tl(cpu_gpr[rA(ctx->opcode)], cpu_gpr[rS(ctx->opcode)], t0);
tcg_gen_ext32u_tl(cpu_gpr[rA(ctx->opcode)], cpu_gpr[rA(ctx->opcode)]);
gen_set_label(l2);
t0 = tcg_temp_new();
/* AND rS with a mask that is 0 when rB >= 0x20 */
#if defined(TARGET_PPC64)
tcg_gen_shli_tl(t0, cpu_gpr[rB(ctx->opcode)], 0x3a);
tcg_gen_sari_tl(t0, t0, 0x3f);
#else
tcg_gen_shli_tl(t0, cpu_gpr[rB(ctx->opcode)], 0x1a);
tcg_gen_sari_tl(t0, t0, 0x1f);
#endif
tcg_gen_andc_tl(t0, cpu_gpr[rS(ctx->opcode)], t0);
t1 = tcg_temp_new();
tcg_gen_andi_tl(t1, cpu_gpr[rB(ctx->opcode)], 0x1f);
tcg_gen_shl_tl(cpu_gpr[rA(ctx->opcode)], t0, t1);
tcg_temp_free(t1);
tcg_temp_free(t0);
tcg_gen_ext32u_tl(cpu_gpr[rA(ctx->opcode)], cpu_gpr[rA(ctx->opcode)]);
if (unlikely(Rc(ctx->opcode) != 0))
gen_set_Rc0(ctx, cpu_gpr[rA(ctx->opcode)]);
}
@ -1848,21 +1851,22 @@ static void gen_srawi(DisasContext *ctx)
static void gen_srw(DisasContext *ctx)
{
TCGv t0, t1;
int l1, l2;
l1 = gen_new_label();
l2 = gen_new_label();
t0 = tcg_temp_local_new();
tcg_gen_andi_tl(t0, cpu_gpr[rB(ctx->opcode)], 0x3f);
tcg_gen_brcondi_tl(TCG_COND_LT, t0, 0x20, l1);
tcg_gen_movi_tl(cpu_gpr[rA(ctx->opcode)], 0);
tcg_gen_br(l2);
gen_set_label(l1);
t0 = tcg_temp_new();
/* AND rS with a mask that is 0 when rB >= 0x20 */
#if defined(TARGET_PPC64)
tcg_gen_shli_tl(t0, cpu_gpr[rB(ctx->opcode)], 0x3a);
tcg_gen_sari_tl(t0, t0, 0x3f);
#else
tcg_gen_shli_tl(t0, cpu_gpr[rB(ctx->opcode)], 0x1a);
tcg_gen_sari_tl(t0, t0, 0x1f);
#endif
tcg_gen_andc_tl(t0, cpu_gpr[rS(ctx->opcode)], t0);
tcg_gen_ext32u_tl(t0, t0);
t1 = tcg_temp_new();
tcg_gen_ext32u_tl(t1, cpu_gpr[rS(ctx->opcode)]);
tcg_gen_shr_tl(cpu_gpr[rA(ctx->opcode)], t1, t0);
tcg_gen_andi_tl(t1, cpu_gpr[rB(ctx->opcode)], 0x1f);
tcg_gen_shr_tl(cpu_gpr[rA(ctx->opcode)], t0, t1);
tcg_temp_free(t1);
gen_set_label(l2);
tcg_temp_free(t0);
if (unlikely(Rc(ctx->opcode) != 0))
gen_set_Rc0(ctx, cpu_gpr[rA(ctx->opcode)]);
@ -1872,19 +1876,17 @@ static void gen_srw(DisasContext *ctx)
/* sld & sld. */
static void gen_sld(DisasContext *ctx)
{
TCGv t0;
int l1, l2;
l1 = gen_new_label();
l2 = gen_new_label();
TCGv t0, t1;
t0 = tcg_temp_local_new();
tcg_gen_andi_tl(t0, cpu_gpr[rB(ctx->opcode)], 0x7f);
tcg_gen_brcondi_tl(TCG_COND_LT, t0, 0x40, l1);
tcg_gen_movi_tl(cpu_gpr[rA(ctx->opcode)], 0);
tcg_gen_br(l2);
gen_set_label(l1);
tcg_gen_shl_tl(cpu_gpr[rA(ctx->opcode)], cpu_gpr[rS(ctx->opcode)], t0);
gen_set_label(l2);
t0 = tcg_temp_new();
/* AND rS with a mask that is 0 when rB >= 0x40 */
tcg_gen_shli_tl(t0, cpu_gpr[rB(ctx->opcode)], 0x39);
tcg_gen_sari_tl(t0, t0, 0x3f);
tcg_gen_andc_tl(t0, cpu_gpr[rS(ctx->opcode)], t0);
t1 = tcg_temp_new();
tcg_gen_andi_tl(t1, cpu_gpr[rB(ctx->opcode)], 0x3f);
tcg_gen_shl_tl(cpu_gpr[rA(ctx->opcode)], t0, t1);
tcg_temp_free(t1);
tcg_temp_free(t0);
if (unlikely(Rc(ctx->opcode) != 0))
gen_set_Rc0(ctx, cpu_gpr[rA(ctx->opcode)]);
@ -1939,19 +1941,17 @@ static void gen_sradi1(DisasContext *ctx)
/* srd & srd. */
static void gen_srd(DisasContext *ctx)
{
TCGv t0;
int l1, l2;
l1 = gen_new_label();
l2 = gen_new_label();
TCGv t0, t1;
t0 = tcg_temp_local_new();
tcg_gen_andi_tl(t0, cpu_gpr[rB(ctx->opcode)], 0x7f);
tcg_gen_brcondi_tl(TCG_COND_LT, t0, 0x40, l1);
tcg_gen_movi_tl(cpu_gpr[rA(ctx->opcode)], 0);
tcg_gen_br(l2);
gen_set_label(l1);
tcg_gen_shr_tl(cpu_gpr[rA(ctx->opcode)], cpu_gpr[rS(ctx->opcode)], t0);
gen_set_label(l2);
t0 = tcg_temp_new();
/* AND rS with a mask that is 0 when rB >= 0x40 */
tcg_gen_shli_tl(t0, cpu_gpr[rB(ctx->opcode)], 0x39);
tcg_gen_sari_tl(t0, t0, 0x3f);
tcg_gen_andc_tl(t0, cpu_gpr[rS(ctx->opcode)], t0);
t1 = tcg_temp_new();
tcg_gen_andi_tl(t1, cpu_gpr[rB(ctx->opcode)], 0x3f);
tcg_gen_shr_tl(cpu_gpr[rA(ctx->opcode)], t0, t1);
tcg_temp_free(t1);
tcg_temp_free(t0);
if (unlikely(Rc(ctx->opcode) != 0))
gen_set_Rc0(ctx, cpu_gpr[rA(ctx->opcode)]);