From 4e9561b20e2f5c1170704a81ec7e1ac961ba5e68 Mon Sep 17 00:00:00 2001 From: Markos Chandras Date: Thu, 13 Aug 2015 09:56:35 +0200 Subject: MIPS: math-emu: Add support for the MIPS R6 MIN{, A} FPU instruction MIPS R6 introduced the following instruction: Scalar Floating-Point Minimum and Scalar Floating-Point argument with Minimum Absolute Value MIN.fmt writes the minimum value of the inputs fs and ft to the destination fd. MINA.fmt takes input arguments fs and ft and writes the argument with the minimum absolute value to the destination fd. Signed-off-by: Markos Chandras Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/10960/ Signed-off-by: Ralf Baechle --- arch/mips/math-emu/cp1emu.c | 48 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) (limited to 'arch/mips/math-emu/cp1emu.c') diff --git a/arch/mips/math-emu/cp1emu.c b/arch/mips/math-emu/cp1emu.c index b65b4ea60232..f397bdfd93fb 100644 --- a/arch/mips/math-emu/cp1emu.c +++ b/arch/mips/math-emu/cp1emu.c @@ -1815,6 +1815,30 @@ static int fpu_emu(struct pt_regs *xcp, struct mips_fpu_struct *ctx, break; } + case fmin_op: { + union ieee754sp fs, ft; + + if (!cpu_has_mips_r6) + return SIGILL; + + SPFROMREG(ft, MIPSInst_FT(ir)); + SPFROMREG(fs, MIPSInst_FS(ir)); + rv.s = ieee754sp_fmin(fs, ft); + break; + } + + case fmina_op: { + union ieee754sp fs, ft; + + if (!cpu_has_mips_r6) + return SIGILL; + + SPFROMREG(ft, MIPSInst_FT(ir)); + SPFROMREG(fs, MIPSInst_FS(ir)); + rv.s = ieee754sp_fmina(fs, ft); + break; + } + case fabs_op: handler.u = ieee754sp_abs; goto scopuop; @@ -2085,6 +2109,30 @@ copcsr: break; } + case fmin_op: { + union ieee754dp fs, ft; + + if (!cpu_has_mips_r6) + return SIGILL; + + DPFROMREG(ft, MIPSInst_FT(ir)); + DPFROMREG(fs, MIPSInst_FS(ir)); + rv.d = ieee754dp_fmin(fs, ft); + break; + } + + case fmina_op: { + union ieee754dp fs, ft; + + if (!cpu_has_mips_r6) + return SIGILL; + + DPFROMREG(ft, MIPSInst_FT(ir)); + DPFROMREG(fs, MIPSInst_FS(ir)); + rv.d = ieee754dp_fmina(fs, ft); + break; + } + case fabs_op: handler.u = ieee754dp_abs; goto dcopuop; -- cgit v1.2.3