recoding.S revision 12771:75508af5d8dc 
1# See LICENSE for license details.
2
3#*****************************************************************************
4# recoding.S
5#-----------------------------------------------------------------------------
6#
7# Test corner cases of John Hauser's microarchitectural recoding scheme.
8# There are twice as many recoded values as IEEE-754 values; some of these
9# extras are redundant (e.g. Inf) and others are illegal (subnormals with
10# too many bits set).
11#
12
13#include "riscv_test.h"
14#include "test_macros.h"
15
16RVTEST_RV64UF
17RVTEST_CODE_BEGIN
18
19  # Make sure infinities with different mantissas compare as equal.
20  flw f0, minf, a0
21  flw f1, three, a0
22  fmul.s f1, f1, f0
23  TEST_CASE( 2, a0, 1, feq.s a0, f0, f1)
24  TEST_CASE( 3, a0, 1, fle.s a0, f0, f1)
25  TEST_CASE( 4, a0, 0, flt.s a0, f0, f1)
26
27  # Likewise, but for zeroes.
28  fcvt.s.w f0, x0
29  li a0, 1
30  fcvt.s.w f1, a0
31  fmul.s f1, f1, f0
32  TEST_CASE(5, a0, 1, feq.s a0, f0, f1)
33  TEST_CASE(6, a0, 1, fle.s a0, f0, f1)
34  TEST_CASE(7, a0, 0, flt.s a0, f0, f1)
35
36  TEST_PASSFAIL
37
38RVTEST_CODE_END
39
40  .data
41RVTEST_DATA_BEGIN
42
43minf: .float -Inf
44three: .float 3.0
45
46RVTEST_DATA_END
47