target-arm: Introduce DisasCompare

Split arm_gen_test_cc into 3 functions, so that it can be reused
for non-branch TCG comparisons.

Backports commit 6c2c63d3a02c79e9035ca0370cc549d0f938a4dd from qemu

qemu/aarch64.h

@@ -120,6 +120,7 @@
 #define arm_excp_target_el arm_excp_target_el_aarch64
 #define arm_excp_unmasked arm_excp_unmasked_aarch64
 #define arm_feature arm_feature_aarch64
+#define arm_free_cc arm_free_cc_aarch64
 #define arm_generate_debug_exceptions arm_generate_debug_exceptions_aarch64
 #define gen_intermediate_code gen_intermediate_code_aarch64
 #define gen_intermediate_code_pc gen_intermediate_code_pc_aarch64
@@ -130,6 +131,7 @@
 #define arm_is_psci_call arm_is_psci_call_aarch64
 #define arm_is_secure arm_is_secure_aarch64
 #define arm_is_secure_below_el3 arm_is_secure_below_el3_aarch64
+#define arm_jump_cc arm_jump_cc_aarch64
 #define arm_ldl_code arm_ldl_code_aarch64
 #define arm_lduw_code arm_lduw_code_aarch64
 #define arm_log_exception arm_log_exception_aarch64
@@ -139,6 +141,7 @@
 #define restore_state_to_opc restore_state_to_opc_aarch64
 #define arm_rmode_to_sf arm_rmode_to_sf_aarch64
 #define arm_singlestep_active arm_singlestep_active_aarch64
+#define arm_test_cc arm_test_cc_aarch64
 #define tlb_fill tlb_fill_aarch64
 #define tlb_flush tlb_flush_aarch64
 #define tlb_flush_page tlb_flush_page_aarch64

qemu/aarch64eb.h

@@ -120,6 +120,7 @@
 #define arm_excp_target_el arm_excp_target_el_aarch64eb
 #define arm_excp_unmasked arm_excp_unmasked_aarch64eb
 #define arm_feature arm_feature_aarch64eb
+#define arm_free_cc arm_free_cc_aarch64eb
 #define arm_generate_debug_exceptions arm_generate_debug_exceptions_aarch64eb
 #define gen_intermediate_code gen_intermediate_code_aarch64eb
 #define gen_intermediate_code_pc gen_intermediate_code_pc_aarch64eb
@@ -130,6 +131,7 @@
 #define arm_is_psci_call arm_is_psci_call_aarch64eb
 #define arm_is_secure arm_is_secure_aarch64eb
 #define arm_is_secure_below_el3 arm_is_secure_below_el3_aarch64eb
+#define arm_jump_cc arm_jump_cc_aarch64eb
 #define arm_ldl_code arm_ldl_code_aarch64eb
 #define arm_lduw_code arm_lduw_code_aarch64eb
 #define arm_log_exception arm_log_exception_aarch64eb
@@ -139,6 +141,7 @@
 #define restore_state_to_opc restore_state_to_opc_aarch64eb
 #define arm_rmode_to_sf arm_rmode_to_sf_aarch64eb
 #define arm_singlestep_active arm_singlestep_active_aarch64eb
+#define arm_test_cc arm_test_cc_aarch64eb
 #define tlb_fill tlb_fill_aarch64eb
 #define tlb_flush tlb_flush_aarch64eb
 #define tlb_flush_page tlb_flush_page_aarch64eb

qemu/arm.h

@@ -120,6 +120,7 @@
 #define arm_excp_target_el arm_excp_target_el_arm
 #define arm_excp_unmasked arm_excp_unmasked_arm
 #define arm_feature arm_feature_arm
+#define arm_free_cc arm_free_cc_arm
 #define arm_generate_debug_exceptions arm_generate_debug_exceptions_arm
 #define gen_intermediate_code gen_intermediate_code_arm
 #define gen_intermediate_code_pc gen_intermediate_code_pc_arm
@@ -130,6 +131,7 @@
 #define arm_is_psci_call arm_is_psci_call_arm
 #define arm_is_secure arm_is_secure_arm
 #define arm_is_secure_below_el3 arm_is_secure_below_el3_arm
+#define arm_jump_cc arm_jump_cc_arm
 #define arm_ldl_code arm_ldl_code_arm
 #define arm_lduw_code arm_lduw_code_arm
 #define arm_log_exception arm_log_exception_arm
@@ -139,6 +141,7 @@
 #define restore_state_to_opc restore_state_to_opc_arm
 #define arm_rmode_to_sf arm_rmode_to_sf_arm
 #define arm_singlestep_active arm_singlestep_active_arm
+#define arm_test_cc arm_test_cc_arm
 #define tlb_fill tlb_fill_arm
 #define tlb_flush tlb_flush_arm
 #define tlb_flush_page tlb_flush_page_arm

qemu/armeb.h

@@ -120,6 +120,7 @@
 #define arm_excp_target_el arm_excp_target_el_armeb
 #define arm_excp_unmasked arm_excp_unmasked_armeb
 #define arm_feature arm_feature_armeb
+#define arm_free_cc arm_free_cc_armeb
 #define arm_generate_debug_exceptions arm_generate_debug_exceptions_armeb
 #define gen_intermediate_code gen_intermediate_code_armeb
 #define gen_intermediate_code_pc gen_intermediate_code_pc_armeb
@@ -130,6 +131,7 @@
 #define arm_is_psci_call arm_is_psci_call_armeb
 #define arm_is_secure arm_is_secure_armeb
 #define arm_is_secure_below_el3 arm_is_secure_below_el3_armeb
+#define arm_jump_cc arm_jump_cc_armeb
 #define arm_ldl_code arm_ldl_code_armeb
 #define arm_lduw_code arm_lduw_code_armeb
 #define arm_log_exception arm_log_exception_armeb
@@ -139,6 +141,7 @@
 #define restore_state_to_opc restore_state_to_opc_armeb
 #define arm_rmode_to_sf arm_rmode_to_sf_armeb
 #define arm_singlestep_active arm_singlestep_active_armeb
+#define arm_test_cc arm_test_cc_armeb
 #define tlb_fill tlb_fill_armeb
 #define tlb_flush tlb_flush_armeb
 #define tlb_flush_page tlb_flush_page_armeb

qemu/header_gen.py

@@ -126,6 +126,7 @@ symbols = (
     'arm_excp_target_el',
     'arm_excp_unmasked',
     'arm_feature',
+    'arm_free_cc',
     'arm_generate_debug_exceptions',
     'gen_intermediate_code',
     'gen_intermediate_code_pc',
@@ -136,6 +137,7 @@ symbols = (
     'arm_is_psci_call',
     'arm_is_secure',
     'arm_is_secure_below_el3',
+    'arm_jump_cc',
     'arm_ldl_code',
     'arm_lduw_code',
     'arm_log_exception',
@@ -145,6 +147,7 @@ symbols = (
     'restore_state_to_opc',
     'arm_rmode_to_sf',
     'arm_singlestep_active',
+    'arm_test_cc',
     'tlb_fill',
     'tlb_flush',
     'tlb_flush_page',

qemu/m68k.h

@@ -120,6 +120,7 @@
 #define arm_excp_target_el arm_excp_target_el_m68k
 #define arm_excp_unmasked arm_excp_unmasked_m68k
 #define arm_feature arm_feature_m68k
+#define arm_free_cc arm_free_cc_m68k
 #define arm_generate_debug_exceptions arm_generate_debug_exceptions_m68k
 #define gen_intermediate_code gen_intermediate_code_m68k
 #define gen_intermediate_code_pc gen_intermediate_code_pc_m68k
@@ -130,6 +131,7 @@
 #define arm_is_psci_call arm_is_psci_call_m68k
 #define arm_is_secure arm_is_secure_m68k
 #define arm_is_secure_below_el3 arm_is_secure_below_el3_m68k
+#define arm_jump_cc arm_jump_cc_m68k
 #define arm_ldl_code arm_ldl_code_m68k
 #define arm_lduw_code arm_lduw_code_m68k
 #define arm_log_exception arm_log_exception_m68k
@@ -139,6 +141,7 @@
 #define restore_state_to_opc restore_state_to_opc_m68k
 #define arm_rmode_to_sf arm_rmode_to_sf_m68k
 #define arm_singlestep_active arm_singlestep_active_m68k
+#define arm_test_cc arm_test_cc_m68k
 #define tlb_fill tlb_fill_m68k
 #define tlb_flush tlb_flush_m68k
 #define tlb_flush_page tlb_flush_page_m68k

qemu/mips.h

@@ -120,6 +120,7 @@
 #define arm_excp_target_el arm_excp_target_el_mips
 #define arm_excp_unmasked arm_excp_unmasked_mips
 #define arm_feature arm_feature_mips
+#define arm_free_cc arm_free_cc_mips
 #define arm_generate_debug_exceptions arm_generate_debug_exceptions_mips
 #define gen_intermediate_code gen_intermediate_code_mips
 #define gen_intermediate_code_pc gen_intermediate_code_pc_mips
@@ -130,6 +131,7 @@
 #define arm_is_psci_call arm_is_psci_call_mips
 #define arm_is_secure arm_is_secure_mips
 #define arm_is_secure_below_el3 arm_is_secure_below_el3_mips
+#define arm_jump_cc arm_jump_cc_mips
 #define arm_ldl_code arm_ldl_code_mips
 #define arm_lduw_code arm_lduw_code_mips
 #define arm_log_exception arm_log_exception_mips
@@ -139,6 +141,7 @@
 #define restore_state_to_opc restore_state_to_opc_mips
 #define arm_rmode_to_sf arm_rmode_to_sf_mips
 #define arm_singlestep_active arm_singlestep_active_mips
+#define arm_test_cc arm_test_cc_mips
 #define tlb_fill tlb_fill_mips
 #define tlb_flush tlb_flush_mips
 #define tlb_flush_page tlb_flush_page_mips

qemu/mips64.h

@@ -120,6 +120,7 @@
 #define arm_excp_target_el arm_excp_target_el_mips64
 #define arm_excp_unmasked arm_excp_unmasked_mips64
 #define arm_feature arm_feature_mips64
+#define arm_free_cc arm_free_cc_mips64
 #define arm_generate_debug_exceptions arm_generate_debug_exceptions_mips64
 #define gen_intermediate_code gen_intermediate_code_mips64
 #define gen_intermediate_code_pc gen_intermediate_code_pc_mips64
@@ -130,6 +131,7 @@
 #define arm_is_psci_call arm_is_psci_call_mips64
 #define arm_is_secure arm_is_secure_mips64
 #define arm_is_secure_below_el3 arm_is_secure_below_el3_mips64
+#define arm_jump_cc arm_jump_cc_mips64
 #define arm_ldl_code arm_ldl_code_mips64
 #define arm_lduw_code arm_lduw_code_mips64
 #define arm_log_exception arm_log_exception_mips64
@@ -139,6 +141,7 @@
 #define restore_state_to_opc restore_state_to_opc_mips64
 #define arm_rmode_to_sf arm_rmode_to_sf_mips64
 #define arm_singlestep_active arm_singlestep_active_mips64
+#define arm_test_cc arm_test_cc_mips64
 #define tlb_fill tlb_fill_mips64
 #define tlb_flush tlb_flush_mips64
 #define tlb_flush_page tlb_flush_page_mips64

qemu/mips64el.h

@@ -120,6 +120,7 @@
 #define arm_excp_target_el arm_excp_target_el_mips64el
 #define arm_excp_unmasked arm_excp_unmasked_mips64el
 #define arm_feature arm_feature_mips64el
+#define arm_free_cc arm_free_cc_mips64el
 #define arm_generate_debug_exceptions arm_generate_debug_exceptions_mips64el
 #define gen_intermediate_code gen_intermediate_code_mips64el
 #define gen_intermediate_code_pc gen_intermediate_code_pc_mips64el
@@ -130,6 +131,7 @@
 #define arm_is_psci_call arm_is_psci_call_mips64el
 #define arm_is_secure arm_is_secure_mips64el
 #define arm_is_secure_below_el3 arm_is_secure_below_el3_mips64el
+#define arm_jump_cc arm_jump_cc_mips64el
 #define arm_ldl_code arm_ldl_code_mips64el
 #define arm_lduw_code arm_lduw_code_mips64el
 #define arm_log_exception arm_log_exception_mips64el
@@ -139,6 +141,7 @@
 #define restore_state_to_opc restore_state_to_opc_mips64el
 #define arm_rmode_to_sf arm_rmode_to_sf_mips64el
 #define arm_singlestep_active arm_singlestep_active_mips64el
+#define arm_test_cc arm_test_cc_mips64el
 #define tlb_fill tlb_fill_mips64el
 #define tlb_flush tlb_flush_mips64el
 #define tlb_flush_page tlb_flush_page_mips64el

qemu/mipsel.h

@@ -120,6 +120,7 @@
 #define arm_excp_target_el arm_excp_target_el_mipsel
 #define arm_excp_unmasked arm_excp_unmasked_mipsel
 #define arm_feature arm_feature_mipsel
+#define arm_free_cc arm_free_cc_mipsel
 #define arm_generate_debug_exceptions arm_generate_debug_exceptions_mipsel
 #define gen_intermediate_code gen_intermediate_code_mipsel
 #define gen_intermediate_code_pc gen_intermediate_code_pc_mipsel
@@ -130,6 +131,7 @@
 #define arm_is_psci_call arm_is_psci_call_mipsel
 #define arm_is_secure arm_is_secure_mipsel
 #define arm_is_secure_below_el3 arm_is_secure_below_el3_mipsel
+#define arm_jump_cc arm_jump_cc_mipsel
 #define arm_ldl_code arm_ldl_code_mipsel
 #define arm_lduw_code arm_lduw_code_mipsel
 #define arm_log_exception arm_log_exception_mipsel
@@ -139,6 +141,7 @@
 #define restore_state_to_opc restore_state_to_opc_mipsel
 #define arm_rmode_to_sf arm_rmode_to_sf_mipsel
 #define arm_singlestep_active arm_singlestep_active_mipsel
+#define arm_test_cc arm_test_cc_mipsel
 #define tlb_fill tlb_fill_mipsel
 #define tlb_flush tlb_flush_mipsel
 #define tlb_flush_page tlb_flush_page_mipsel

qemu/powerpc.h

@@ -120,6 +120,7 @@
 #define arm_excp_target_el arm_excp_target_el_powerpc
 #define arm_excp_unmasked arm_excp_unmasked_powerpc
 #define arm_feature arm_feature_powerpc
+#define arm_free_cc arm_free_cc_powerpc
 #define arm_generate_debug_exceptions arm_generate_debug_exceptions_powerpc
 #define gen_intermediate_code gen_intermediate_code_powerpc
 #define gen_intermediate_code_pc gen_intermediate_code_pc_powerpc
@@ -130,6 +131,7 @@
 #define arm_is_psci_call arm_is_psci_call_powerpc
 #define arm_is_secure arm_is_secure_powerpc
 #define arm_is_secure_below_el3 arm_is_secure_below_el3_powerpc
+#define arm_jump_cc arm_jump_cc_powerpc
 #define arm_ldl_code arm_ldl_code_powerpc
 #define arm_lduw_code arm_lduw_code_powerpc
 #define arm_log_exception arm_log_exception_powerpc
@@ -139,6 +141,7 @@
 #define restore_state_to_opc restore_state_to_opc_powerpc
 #define arm_rmode_to_sf arm_rmode_to_sf_powerpc
 #define arm_singlestep_active arm_singlestep_active_powerpc
+#define arm_test_cc arm_test_cc_powerpc
 #define tlb_fill tlb_fill_powerpc
 #define tlb_flush tlb_flush_powerpc
 #define tlb_flush_page tlb_flush_page_powerpc

qemu/sparc.h

@@ -120,6 +120,7 @@
 #define arm_excp_target_el arm_excp_target_el_sparc
 #define arm_excp_unmasked arm_excp_unmasked_sparc
 #define arm_feature arm_feature_sparc
+#define arm_free_cc arm_free_cc_sparc
 #define arm_generate_debug_exceptions arm_generate_debug_exceptions_sparc
 #define gen_intermediate_code gen_intermediate_code_sparc
 #define gen_intermediate_code_pc gen_intermediate_code_pc_sparc
@@ -130,6 +131,7 @@
 #define arm_is_psci_call arm_is_psci_call_sparc
 #define arm_is_secure arm_is_secure_sparc
 #define arm_is_secure_below_el3 arm_is_secure_below_el3_sparc
+#define arm_jump_cc arm_jump_cc_sparc
 #define arm_ldl_code arm_ldl_code_sparc
 #define arm_lduw_code arm_lduw_code_sparc
 #define arm_log_exception arm_log_exception_sparc
@@ -139,6 +141,7 @@
 #define restore_state_to_opc restore_state_to_opc_sparc
 #define arm_rmode_to_sf arm_rmode_to_sf_sparc
 #define arm_singlestep_active arm_singlestep_active_sparc
+#define arm_test_cc arm_test_cc_sparc
 #define tlb_fill tlb_fill_sparc
 #define tlb_flush tlb_flush_sparc
 #define tlb_flush_page tlb_flush_page_sparc

qemu/sparc64.h

@@ -120,6 +120,7 @@
 #define arm_excp_target_el arm_excp_target_el_sparc64
 #define arm_excp_unmasked arm_excp_unmasked_sparc64
 #define arm_feature arm_feature_sparc64
+#define arm_free_cc arm_free_cc_sparc64
 #define arm_generate_debug_exceptions arm_generate_debug_exceptions_sparc64
 #define gen_intermediate_code gen_intermediate_code_sparc64
 #define gen_intermediate_code_pc gen_intermediate_code_pc_sparc64
@@ -130,6 +131,7 @@
 #define arm_is_psci_call arm_is_psci_call_sparc64
 #define arm_is_secure arm_is_secure_sparc64
 #define arm_is_secure_below_el3 arm_is_secure_below_el3_sparc64
+#define arm_jump_cc arm_jump_cc_sparc64
 #define arm_ldl_code arm_ldl_code_sparc64
 #define arm_lduw_code arm_lduw_code_sparc64
 #define arm_log_exception arm_log_exception_sparc64
@@ -139,6 +141,7 @@
 #define restore_state_to_opc restore_state_to_opc_sparc64
 #define arm_rmode_to_sf arm_rmode_to_sf_sparc64
 #define arm_singlestep_active arm_singlestep_active_sparc64
+#define arm_test_cc arm_test_cc_sparc64
 #define tlb_fill tlb_fill_sparc64
 #define tlb_flush tlb_flush_sparc64
 #define tlb_flush_page tlb_flush_page_sparc64

qemu/target-arm/translate.c

@@ -736,81 +736,104 @@ static void gen_thumb2_parallel_addsub(DisasContext *s, int op1, int op2, TCGv_i
 #undef PAS_OP
 
 /*
- * generate a conditional branch based on ARM condition code cc.
+ * Generate a conditional based on ARM condition code cc.
  * This is common between ARM and Aarch64 targets.
  */
-void arm_gen_test_cc(TCGContext *tcg_ctx, int cc, TCGLabel *label)
+void arm_test_cc(TCGContext *tcg_ctx, DisasCompare *cmp, int cc)
 {
-    TCGv_i32 tmp;
+    TCGv_i32 value;
-    TCGLabel *inv;
+    TCGCond cond;
+    bool global = true;
 
     switch (cc) {
     case 0: /* eq: Z */
-        tcg_gen_brcondi_i32(tcg_ctx, TCG_COND_EQ, tcg_ctx->cpu_ZF, 0, label);
-        break;
     case 1: /* ne: !Z */
-        tcg_gen_brcondi_i32(tcg_ctx, TCG_COND_NE, tcg_ctx->cpu_ZF, 0, label);
+        cond = TCG_COND_EQ;
+        value = tcg_ctx->cpu_ZF;
         break;
+
     case 2: /* cs: C */
-        tcg_gen_brcondi_i32(tcg_ctx, TCG_COND_NE, tcg_ctx->cpu_CF, 0, label);
-        break;
     case 3: /* cc: !C */
-        tcg_gen_brcondi_i32(tcg_ctx, TCG_COND_EQ, tcg_ctx->cpu_CF, 0, label);
+        cond = TCG_COND_NE;
+        value = tcg_ctx->cpu_CF;
         break;
+
     case 4: /* mi: N */
-        tcg_gen_brcondi_i32(tcg_ctx, TCG_COND_LT, tcg_ctx->cpu_NF, 0, label);
-        break;
     case 5: /* pl: !N */
-        tcg_gen_brcondi_i32(tcg_ctx, TCG_COND_GE, tcg_ctx->cpu_NF, 0, label);
+        cond = TCG_COND_LT;
+        value = tcg_ctx->cpu_NF;
         break;
+
     case 6: /* vs: V */
-        tcg_gen_brcondi_i32(tcg_ctx, TCG_COND_LT, tcg_ctx->cpu_VF, 0, label);
-        break;
     case 7: /* vc: !V */
-        tcg_gen_brcondi_i32(tcg_ctx, TCG_COND_GE, tcg_ctx->cpu_VF, 0, label);
+        cond = TCG_COND_LT;
+        value = tcg_ctx->cpu_VF;
         break;
+
     case 8: /* hi: C && !Z */
-        inv = gen_new_label(tcg_ctx);
+    case 9: /* ls: !C || Z -> !(C && !Z) */
-        tcg_gen_brcondi_i32(tcg_ctx, TCG_COND_EQ, tcg_ctx->cpu_CF, 0, inv);
+        cond = TCG_COND_NE;
-        tcg_gen_brcondi_i32(tcg_ctx, TCG_COND_NE, tcg_ctx->cpu_ZF, 0, label);
+        value = tcg_temp_new_i32(tcg_ctx);
-        gen_set_label(tcg_ctx, inv);
+        global = false;
-        break;
+        /* CF is 1 for C, so -CF is an all-bits-set mask for C;
-    case 9: /* ls: !C || Z */
+           ZF is non-zero for !Z; so AND the two subexpressions.  */
-        tcg_gen_brcondi_i32(tcg_ctx, TCG_COND_EQ, tcg_ctx->cpu_CF, 0, label);
+        tcg_gen_neg_i32(tcg_ctx, value, tcg_ctx->cpu_CF);
-        tcg_gen_brcondi_i32(tcg_ctx, TCG_COND_EQ, tcg_ctx->cpu_ZF, 0, label);
+        tcg_gen_and_i32(tcg_ctx, value, value, tcg_ctx->cpu_ZF);
         break;
+
     case 10: /* ge: N == V -> N ^ V == 0 */
-        tmp = tcg_temp_new_i32(tcg_ctx);
-        tcg_gen_xor_i32(tcg_ctx, tmp, tcg_ctx->cpu_VF, tcg_ctx->cpu_NF);
-        tcg_gen_brcondi_i32(tcg_ctx, TCG_COND_GE, tmp, 0, label);
-        tcg_temp_free_i32(tcg_ctx, tmp);
-        break;
     case 11: /* lt: N != V -> N ^ V != 0 */
-        tmp = tcg_temp_new_i32(tcg_ctx);
+        /* Since we're only interested in the sign bit, == 0 is >= 0.  */
-        tcg_gen_xor_i32(tcg_ctx, tmp, tcg_ctx->cpu_VF, tcg_ctx->cpu_NF);
+        cond = TCG_COND_GE;
-        tcg_gen_brcondi_i32(tcg_ctx, TCG_COND_LT, tmp, 0, label);
+        value = tcg_temp_new_i32(tcg_ctx);
-        tcg_temp_free_i32(tcg_ctx, tmp);
+        global = false;
+        tcg_gen_xor_i32(tcg_ctx, value, tcg_ctx->cpu_VF, tcg_ctx->cpu_NF);
         break;
+
     case 12: /* gt: !Z && N == V */
-        inv = gen_new_label(tcg_ctx);
-        tcg_gen_brcondi_i32(tcg_ctx, TCG_COND_EQ, tcg_ctx->cpu_ZF, 0, inv);
-        tmp = tcg_temp_new_i32(tcg_ctx);
-        tcg_gen_xor_i32(tcg_ctx, tmp, tcg_ctx->cpu_VF, tcg_ctx->cpu_NF);
-        tcg_gen_brcondi_i32(tcg_ctx, TCG_COND_GE, tmp, 0, label);
-        tcg_temp_free_i32(tcg_ctx, tmp);
-        gen_set_label(tcg_ctx, inv);
-        break;
     case 13: /* le: Z || N != V */
-        tcg_gen_brcondi_i32(tcg_ctx, TCG_COND_EQ, tcg_ctx->cpu_ZF, 0, label);
+        cond = TCG_COND_NE;
-        tmp = tcg_temp_new_i32(tcg_ctx);
+        value = tcg_temp_new_i32(tcg_ctx);
-        tcg_gen_xor_i32(tcg_ctx, tmp, tcg_ctx->cpu_VF, tcg_ctx->cpu_NF);
+        global = false;
-        tcg_gen_brcondi_i32(tcg_ctx, TCG_COND_LT, tmp, 0, label);
+        /* (N == V) is equal to the sign bit of ~(NF ^ VF).  Propagate
-        tcg_temp_free_i32(tcg_ctx, tmp);
+         * the sign bit then AND with ZF to yield the result.  */
+        tcg_gen_xor_i32(tcg_ctx, value, tcg_ctx->cpu_VF, tcg_ctx->cpu_NF);
+        tcg_gen_sari_i32(tcg_ctx, value, value, 31);
+        tcg_gen_andc_i32(tcg_ctx, value, tcg_ctx->cpu_ZF, value);
         break;
+
     default:
         fprintf(stderr, "Bad condition code 0x%x\n", cc);
         abort();
     }
+
+    if (cc & 1) {
+        cond = tcg_invert_cond(cond);
+    }
+
+    cmp->cond = cond;
+    cmp->value = value;
+    cmp->value_global = global;
+}
+
+void arm_free_cc(TCGContext *tcg_ctx, DisasCompare *cmp)
+{
+    if (!cmp->value_global) {
+        tcg_temp_free_i32(tcg_ctx, cmp->value);
+    }
+}
+
+void arm_jump_cc(TCGContext *tcg_ctx, DisasCompare *cmp, TCGLabel *label)
+{
+    tcg_gen_brcondi_i32(tcg_ctx, cmp->cond, cmp->value, 0, label);
+}
+
+void arm_gen_test_cc(TCGContext *tcg_ctx, int cc, TCGLabel *label)
+{
+    DisasCompare cmp;
+    arm_test_cc(tcg_ctx, &cmp, cc);
+    arm_jump_cc(tcg_ctx, &cmp, label);
+    arm_free_cc(tcg_ctx, &cmp);
 }
 
 static const uint8_t table_logic_cc[16] = {

qemu/target-arm/translate.h

@@ -62,6 +62,11 @@ typedef struct DisasContext {
     struct uc_struct *uc;
 } DisasContext;
 
+typedef struct DisasCompare {
+    TCGCond cond;
+    TCGv_i32 value;
+    bool value_global;
+} DisasCompare;
 
 static inline int arm_dc_feature(DisasContext *dc, int feature)
 {
@@ -111,6 +116,9 @@ static inline void gen_a64_set_pc_im(uint64_t val)
 }
 #endif
 
+void arm_test_cc(TCGContext *tcg_ctx, DisasCompare *cmp, int cc);
+void arm_free_cc(TCGContext *tcg_ctx, DisasCompare *cmp);
+void arm_jump_cc(TCGContext *tcg_ctx, DisasCompare *cmp, TCGLabel *label);
 void arm_gen_test_cc(TCGContext *tcg_ctx, int cc, TCGLabel *label);
 
 #endif /* TARGET_ARM_TRANSLATE_H */

qemu/x86_64.h

@@ -120,6 +120,7 @@
 #define arm_excp_target_el arm_excp_target_el_x86_64
 #define arm_excp_unmasked arm_excp_unmasked_x86_64
 #define arm_feature arm_feature_x86_64
+#define arm_free_cc arm_free_cc_x86_64
 #define arm_generate_debug_exceptions arm_generate_debug_exceptions_x86_64
 #define gen_intermediate_code gen_intermediate_code_x86_64
 #define gen_intermediate_code_pc gen_intermediate_code_pc_x86_64
@@ -130,6 +131,7 @@
 #define arm_is_psci_call arm_is_psci_call_x86_64
 #define arm_is_secure arm_is_secure_x86_64
 #define arm_is_secure_below_el3 arm_is_secure_below_el3_x86_64
+#define arm_jump_cc arm_jump_cc_x86_64
 #define arm_ldl_code arm_ldl_code_x86_64
 #define arm_lduw_code arm_lduw_code_x86_64
 #define arm_log_exception arm_log_exception_x86_64
@@ -139,6 +141,7 @@
 #define restore_state_to_opc restore_state_to_opc_x86_64
 #define arm_rmode_to_sf arm_rmode_to_sf_x86_64
 #define arm_singlestep_active arm_singlestep_active_x86_64
+#define arm_test_cc arm_test_cc_x86_64
 #define tlb_fill tlb_fill_x86_64
 #define tlb_flush tlb_flush_x86_64
 #define tlb_flush_page tlb_flush_page_x86_64