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authorRichard Henderson <rth@twiddle.net>2015-08-31 13:01:47 -0700
committerRichard Henderson <rth@twiddle.net>2015-10-07 20:36:48 +1100
commit2bf2e019ed0a6349220620240c0ba807846793b9 (patch)
tree35ec1e70f1d8967253a47523ebe6273a0edb6a6b /target-sparc
parentbfa31b765798139804ce9e5e35c7e142d233df31 (diff)
downloadqemu-arm-2bf2e019ed0a6349220620240c0ba807846793b9.tar.gz
target-sparc: Split out gen_branch_n
Unify three copies of this code from different branch types. Fix the case when npc == DYNAMIC_PC, i.e. a branch within a delay slot. Reviewed-by: Aurelien Jarno <aurelien@aurel32.net> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'target-sparc')
-rw-r--r--target-sparc/translate.c55
1 files changed, 28 insertions, 27 deletions
diff --git a/target-sparc/translate.c b/target-sparc/translate.c
index cbc90d8246..c6a8d86400 100644
--- a/target-sparc/translate.c
+++ b/target-sparc/translate.c
@@ -970,6 +970,31 @@ static void gen_branch_a(DisasContext *dc, target_ulong pc1)
dc->is_br = 1;
}
+static void gen_branch_n(DisasContext *dc, target_ulong pc1)
+{
+ target_ulong npc = dc->npc;
+
+ if (likely(npc != DYNAMIC_PC)) {
+ dc->pc = npc;
+ dc->jump_pc[0] = pc1;
+ dc->jump_pc[1] = npc + 4;
+ dc->npc = JUMP_PC;
+ } else {
+ TCGv t, z;
+
+ tcg_gen_mov_tl(cpu_pc, cpu_npc);
+
+ tcg_gen_addi_tl(cpu_npc, cpu_npc, 4);
+ t = tcg_const_tl(pc1);
+ z = tcg_const_tl(0);
+ tcg_gen_movcond_tl(TCG_COND_NE, cpu_npc, cpu_cond, z, t, cpu_npc);
+ tcg_temp_free(t);
+ tcg_temp_free(z);
+
+ dc->pc = DYNAMIC_PC;
+ }
+}
+
static inline void gen_generic_branch(DisasContext *dc)
{
TCGv npc0 = tcg_const_tl(dc->jump_pc[0]);
@@ -1402,15 +1427,7 @@ static void do_branch(DisasContext *dc, int32_t offset, uint32_t insn, int cc)
if (a) {
gen_branch_a(dc, target);
} else {
- dc->pc = dc->npc;
- dc->jump_pc[0] = target;
- if (unlikely(dc->npc == DYNAMIC_PC)) {
- dc->jump_pc[1] = DYNAMIC_PC;
- tcg_gen_addi_tl(cpu_pc, cpu_npc, 4);
- } else {
- dc->jump_pc[1] = dc->npc + 4;
- dc->npc = JUMP_PC;
- }
+ gen_branch_n(dc, target);
}
}
}
@@ -1450,15 +1467,7 @@ static void do_fbranch(DisasContext *dc, int32_t offset, uint32_t insn, int cc)
if (a) {
gen_branch_a(dc, target);
} else {
- dc->pc = dc->npc;
- dc->jump_pc[0] = target;
- if (unlikely(dc->npc == DYNAMIC_PC)) {
- dc->jump_pc[1] = DYNAMIC_PC;
- tcg_gen_addi_tl(cpu_pc, cpu_npc, 4);
- } else {
- dc->jump_pc[1] = dc->npc + 4;
- dc->npc = JUMP_PC;
- }
+ gen_branch_n(dc, target);
}
}
}
@@ -1478,15 +1487,7 @@ static void do_branch_reg(DisasContext *dc, int32_t offset, uint32_t insn,
if (a) {
gen_branch_a(dc, target);
} else {
- dc->pc = dc->npc;
- dc->jump_pc[0] = target;
- if (unlikely(dc->npc == DYNAMIC_PC)) {
- dc->jump_pc[1] = DYNAMIC_PC;
- tcg_gen_addi_tl(cpu_pc, cpu_npc, 4);
- } else {
- dc->jump_pc[1] = dc->npc + 4;
- dc->npc = JUMP_PC;
- }
+ gen_branch_n(dc, target);
}
}