Add smoke coverage for Octeon QMAC and QMACS fixed-point accumulator
instruction paths.
The coverage exercises normal accumulation, saturating accumulation, and
the sticky saturation flag.
Signed-off-by: James Hilliard <james.hilliard1@gmail.com>
---
Changes v12 -> v13:
- Add QMAC/QMACS smoke coverage.
---
tests/tcg/mips/user/isa/octeon/octeon-insns.c | 40 +++++++++++++++++++++++++++
1 file changed, 40 insertions(+)
diff --git a/tests/tcg/mips/user/isa/octeon/octeon-insns.c b/tests/tcg/mips/user/isa/octeon/octeon-insns.c
index 6480c8532a..6fffc82010 100644
--- a/tests/tcg/mips/user/isa/octeon/octeon-insns.c
+++ b/tests/tcg/mips/user/isa/octeon/octeon-insns.c
@@ -129,6 +129,43 @@ static uint64_t octeon_vmm0(uint64_t mpl0, uint64_t p0,
return rd;
}
+static uint64_t octeon_qmac_lo(uint64_t rs, uint64_t rt, uint64_t lo)
+{
+ uint64_t rd;
+
+ asm volatile(
+ "move $8, %[rs]\n\t"
+ "move $9, %[rt]\n\t"
+ "mtlo %[lo]\n\t"
+ "mthi $0\n\t"
+ ".word 0x710904d2\n\t" /* qmac.03 $8, $9 */
+ "mflo %[rd]\n\t"
+ : [rd] "=r" (rd)
+ : [rs] "r" (rs), [rt] "r" (rt), [lo] "r" (lo)
+ : "$8", "$9");
+
+ return rd;
+}
+
+static uint64_t octeon_qmacs_state(uint64_t rs, uint64_t rt, uint64_t lo)
+{
+ uint64_t hi, rd;
+
+ asm volatile(
+ "move $8, %[rs]\n\t"
+ "move $9, %[rt]\n\t"
+ "mtlo %[lo]\n\t"
+ "mthi $0\n\t"
+ ".word 0x71090012\n\t" /* qmacs.00 $8, $9 */
+ "mfhi %[hi]\n\t"
+ "mflo %[rd]\n\t"
+ : [hi] "=r" (hi), [rd] "=r" (rd)
+ : [rs] "r" (rs), [rt] "r" (rt), [lo] "r" (lo)
+ : "$8", "$9");
+
+ return ((hi & 1) << 32) | (rd & 0xffffffff);
+}
+
static uint64_t octeon_vmm0_zeroes_mpl1(void)
{
uint64_t rd;
@@ -355,6 +392,9 @@ int main(void)
assert(octeon_seq(0xabc, 0xdef) == 0);
assert(octeon_sne(0xabc, 0xabc) == 0);
assert(octeon_sne(0xabc, 0xdef) == 1);
+ assert(octeon_qmac_lo(0x0003000000000000ULL, 2, 1) == 13);
+ assert(octeon_qmacs_state(1, 1, 0x7ffffffe) == 0x17fffffffULL);
+ assert(octeon_qmacs_state(0x8000, 0x8000, 0) == 0x17fffffffULL);
assert(octeon_vmulu(5, 7, 11) == 46);
assert(octeon_vmm0(5, 13, 7, 11) == 59);
assert(octeon_vmm0_zeroes_mpl1() == 0);
--
2.54.0