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| author | Markos Chandras <markos.chandras@imgtec.com> | 2015-08-13 09:56:31 +0200 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2015-09-03 12:08:13 +0200 |
| commit | e24c3bec3e8e254a3784b3e4c97bd3a76fbcc807 (patch) | |
| tree | 51e9c089ebaa5f7e29b8ef07bbdb01e72ee96fda /arch/mips/math-emu/cp1emu.c | |
| parent | 130fe357ee895421a4aefef7b1285bf52f295afe (diff) | |
| download | linux-e24c3bec3e8e254a3784b3e4c97bd3a76fbcc807.tar.bz2 | |
MIPS: math-emu: Add support for the MIPS R6 MADDF FPU instruction
MIPS R6 introduced the following instruction:
Floating Point Fused Multiply Add:
MADDF.fmt To perform a fused multiply-add of FP values.
MADDF.fmt: FPR[fd] = FPR[fd] + (FPR[fs] x FPR[ft])
Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/10956/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/math-emu/cp1emu.c')
| -rw-r--r-- | arch/mips/math-emu/cp1emu.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/arch/mips/math-emu/cp1emu.c b/arch/mips/math-emu/cp1emu.c index 8978d52adf0e..67390ec2c2f8 100644 --- a/arch/mips/math-emu/cp1emu.c +++ b/arch/mips/math-emu/cp1emu.c @@ -1765,6 +1765,19 @@ static int fpu_emu(struct pt_regs *xcp, struct mips_fpu_struct *ctx, rv.w = 0; break; + case fmaddf_op: { + union ieee754sp ft, fs, fd; + + if (!cpu_has_mips_r6) + return SIGILL; + + SPFROMREG(ft, MIPSInst_FT(ir)); + SPFROMREG(fs, MIPSInst_FS(ir)); + SPFROMREG(fd, MIPSInst_FD(ir)); + rv.s = ieee754sp_maddf(fd, fs, ft); + break; + } + case fabs_op: handler.u = ieee754sp_abs; goto scopuop; @@ -1985,6 +1998,19 @@ copcsr: rv.l = 0; break; + case fmaddf_op: { + union ieee754dp ft, fs, fd; + + if (!cpu_has_mips_r6) + return SIGILL; + + DPFROMREG(ft, MIPSInst_FT(ir)); + DPFROMREG(fs, MIPSInst_FS(ir)); + DPFROMREG(fd, MIPSInst_FD(ir)); + rv.d = ieee754dp_maddf(fd, fs, ft); + break; + } + case fabs_op: handler.u = ieee754dp_abs; goto dcopuop; |