From: James Hilliard <[email protected]> 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 <[email protected]> Reviewed-by: Richard Henderson <[email protected]> Message-ID: <20260608-mips-octeon-missing-insns-v2-v16-21-daef7a0d8...@gmail.com> Signed-off-by: Philippe Mathieu-Daudé <[email protected]> --- 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 6480c8532a1..6fffc820103 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); -- 2.53.0
