From cb71f8342883992ee51f54275d4cee897a4f1745 Mon Sep 17 00:00:00 2001 From: Luke Kenneth Casson Leighton Date: Sat, 15 May 2021 20:09:54 +0100 Subject: [PATCH] FP mul test, correct pseudocode to use FRC --- openpower/isa/fparith.mdwn | 12 ++++++------ src/openpower/decoder/isa/test_caller_fp.py | 17 +++++++++++++++++ 2 files changed, 23 insertions(+), 6 deletions(-) diff --git a/openpower/isa/fparith.mdwn b/openpower/isa/fparith.mdwn index 7bd434c8..2ce6a2cd 100644 --- a/openpower/isa/fparith.mdwn +++ b/openpower/isa/fparith.mdwn @@ -78,12 +78,12 @@ Special Registers Altered: A-Form -* fmuls FRT,FRA,FRB (Rc=0) -* fmuls. FRT,FRA,FRB (Rc=0) +* fmuls FRT,FRA,FRC (Rc=0) +* fmuls. FRT,FRA,FRC (Rc=0) Pseudo-code: - FRT <- FPMUL32(FRA, FRB) + FRT <- FPMUL32(FRA, FRC) Special Registers Altered: @@ -96,12 +96,12 @@ Special Registers Altered: A-Form -* fmul FRT,FRA,FRB (Rc=0) -* fmul. FRT,FRA,FRB (Rc=0) +* fmul FRT,FRA,FRC (Rc=0) +* fmul. FRT,FRA,FRC (Rc=0) Pseudo-code: - FRT <- FPMUL64(FRA, FRB) + FRT <- FPMUL64(FRA, FRC) Special Registers Altered: diff --git a/src/openpower/decoder/isa/test_caller_fp.py b/src/openpower/decoder/isa/test_caller_fp.py index a0635fc1..c2cbd4dd 100644 --- a/src/openpower/decoder/isa/test_caller_fp.py +++ b/src/openpower/decoder/isa/test_caller_fp.py @@ -178,6 +178,23 @@ class DecoderTestCase(FHDLTestCase): self.assertEqual(sim.fpr(2), SelectableInt(0xC02399999999999A, 64)) self.assertEqual(sim.fpr(3), SelectableInt(0xC006666666666668, 64)) + def test_fp_mul(self): + """>>> lst = ["fmul 3, 1, 2", + ] + """ + lst = ["fmul 3, 1, 2", # 7.0 * -9.8 = -68.6 + ] + + fprs = [0] * 32 + fprs[1] = 0x401C000000000000 # 7.0 + fprs[2] = 0xC02399999999999A # -9.8 + + with Program(lst, bigendian=False) as program: + sim = self.run_tst_program(program, initial_fprs=fprs) + self.assertEqual(sim.fpr(1), SelectableInt(0x401C000000000000, 64)) + self.assertEqual(sim.fpr(2), SelectableInt(0xC02399999999999A, 64)) + self.assertEqual(sim.fpr(3), SelectableInt(0xC051266666666667, 64)) + def run_tst_program(self, prog, initial_regs=None, initial_mem=None, initial_fprs=None): -- 2.30.2