target/loongarch: Implement vfcmp
This patch includes:
- VFCMP.cond.{S/D}.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Song Gao <gaosong@loongson.cn>
Message-Id: <20230504122810.4094787-37-gaosong@loongson.cn>
diff --git a/target/loongarch/lsx_helper.c b/target/loongarch/lsx_helper.c
index 21d9714..da9eccc 100644
--- a/target/loongarch/lsx_helper.c
+++ b/target/loongarch/lsx_helper.c
@@ -2660,3 +2660,57 @@
VCMPI(vslti_hu, 16, UH, VSLT)
VCMPI(vslti_wu, 32, UW, VSLT)
VCMPI(vslti_du, 64, UD, VSLT)
+
+static uint64_t vfcmp_common(CPULoongArchState *env,
+ FloatRelation cmp, uint32_t flags)
+{
+ uint64_t ret = 0;
+
+ switch (cmp) {
+ case float_relation_less:
+ ret = (flags & FCMP_LT);
+ break;
+ case float_relation_equal:
+ ret = (flags & FCMP_EQ);
+ break;
+ case float_relation_greater:
+ ret = (flags & FCMP_GT);
+ break;
+ case float_relation_unordered:
+ ret = (flags & FCMP_UN);
+ break;
+ default:
+ g_assert_not_reached();
+ }
+
+ if (ret) {
+ ret = -1;
+ }
+
+ return ret;
+}
+
+#define VFCMP(NAME, BIT, E, FN) \
+void HELPER(NAME)(CPULoongArchState *env, \
+ uint32_t vd, uint32_t vj, uint32_t vk, uint32_t flags) \
+{ \
+ int i; \
+ VReg t; \
+ VReg *Vd = &(env->fpr[vd].vreg); \
+ VReg *Vj = &(env->fpr[vj].vreg); \
+ VReg *Vk = &(env->fpr[vk].vreg); \
+ \
+ vec_clear_cause(env); \
+ for (i = 0; i < LSX_LEN/BIT ; i++) { \
+ FloatRelation cmp; \
+ cmp = FN(Vj->E(i), Vk->E(i), &env->fp_status); \
+ t.E(i) = vfcmp_common(env, cmp, flags); \
+ vec_update_fcsr0(env, GETPC()); \
+ } \
+ *Vd = t; \
+}
+
+VFCMP(vfcmp_c_s, 32, UW, float32_compare_quiet)
+VFCMP(vfcmp_s_s, 32, UW, float32_compare)
+VFCMP(vfcmp_c_d, 64, UD, float64_compare_quiet)
+VFCMP(vfcmp_s_d, 64, UD, float64_compare)
