Add test for FP recoding corner cases

diff --git a/isa/rv64uf/Makefrag b/isa/rv64uf/Makefrag
index c29d4f4f9bd1965e195d43b00d94dca866672ab3..d604a857f0ac9e72ae0d6a614ab61a29a0726114 100644 (file)
--- a/isa/rv64uf/Makefrag
+++ b/isa/rv64uf/Makefrag
@@ -4,7 +4,7 @@
 
 rv64uf_sc_tests = \
        fadd fdiv fclass fcmp fcvt fcvt_w fmadd fmin fsgnj \
-       ldst move structural \
+       ldst move structural recoding \
 
 rv64uf_sc_vec_tests = \
        fadd fcmp fcvt fcvt_w fmadd fmin fsgnj \

diff --git a/isa/rv64uf/recoding.S b/isa/rv64uf/recoding.S
new file mode 100644 (file)
index 0000000..dee7f6d
--- /dev/null
+++ b/isa/rv64uf/recoding.S
@@ -0,0 +1,36 @@
+# See LICENSE for license details.
+
+#*****************************************************************************
+# recoding.S
+#-----------------------------------------------------------------------------
+#
+# Test corner cases of John Hauser's microarchitectural recoding scheme.
+#
+
+#include "riscv_test.h"
+#include "test_macros.h"
+
+RVTEST_RV64UF
+RVTEST_CODE_BEGIN
+
+  # Infinity has a redundant internal form in Rocket.
+  # Make sure two different internal infinities compare as equal.
+  li TESTNUM, 8
+  flw f0, minf, a0
+  flw f1, three, a0
+  fmul.s f1, f1, f0
+  TEST_CASE( 8, a0, 1, feq.s a0, f0, f1)
+  TEST_CASE( 9, a0, 1, fle.s a0, f0, f1)
+  TEST_CASE(10, a0, 0, flt.s a0, f0, f1)
+
+  TEST_PASSFAIL
+
+RVTEST_CODE_END
+
+  .data
+RVTEST_DATA_BEGIN
+
+minf: .float -Inf
+three: .float 3.0
+
+RVTEST_DATA_END