MIPS: math-emu: Add support for the MIPS R6 RINT FPU instruction
MIPS R6 introduced the following instruction:
Floating-Point Round to Integral
Scalar floating-point round to integral floating point value.
RINT.fmt: FPR[fd] = round_int(FPR[fs])
Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/10958/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/math-emu/cp1emu.c b/arch/mips/math-emu/cp1emu.c
index 54964b3..a348cbe 100644
--- a/arch/mips/math-emu/cp1emu.c
+++ b/arch/mips/math-emu/cp1emu.c
@@ -1791,6 +1791,18 @@
break;
}
+ case frint_op: {
+ union ieee754sp fs;
+
+ if (!cpu_has_mips_r6)
+ return SIGILL;
+
+ SPFROMREG(fs, MIPSInst_FS(ir));
+ rv.l = ieee754sp_tlong(fs);
+ rv.s = ieee754sp_flong(rv.l);
+ goto copcsr;
+ }
+
case fabs_op:
handler.u = ieee754sp_abs;
goto scopuop;
@@ -2037,6 +2049,18 @@
break;
}
+ case frint_op: {
+ union ieee754dp fs;
+
+ if (!cpu_has_mips_r6)
+ return SIGILL;
+
+ DPFROMREG(fs, MIPSInst_FS(ir));
+ rv.l = ieee754dp_tlong(fs);
+ rv.d = ieee754dp_flong(rv.l);
+ goto copcsr;
+ }
+
case fabs_op:
handler.u = ieee754dp_abs;
goto dcopuop;