From: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
Date: Sat, 10 Jul 2021 11:11:19 +0000 (+0100)
Subject: add ffadds decoding:
X-Git-Tag: xlen-bcd~309
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=d56cf499ec0ffc07a0bd0428c9271c2c26d83905;p=openpower-isa.git

add ffadds decoding:
- SVP64 trans manual creation of opcode with XO=0b01101
- add to power enums ISA list
- add to minor 59 and SVP64 CSV
---

diff --git a/openpower/isatables/RM-1P-2S1D.csv b/openpower/isatables/RM-1P-2S1D.csv
index 93ebb9ea..19b6f61e 100644
--- a/openpower/isatables/RM-1P-2S1D.csv
+++ b/openpower/isatables/RM-1P-2S1D.csv
@@ -79,6 +79,7 @@ divduo,,1P,EXTRA3,d:RT;d:CR0,s:RA,s:RB,0,RA,RB,0,RT,0,CR0,0
 divwuo,,1P,EXTRA3,d:RT;d:CR0,s:RA,s:RB,0,RA,RB,0,RT,0,CR0,0
 divdo,,1P,EXTRA3,d:RT;d:CR0,s:RA,s:RB,0,RA,RB,0,RT,0,CR0,0
 divwo,,1P,EXTRA3,d:RT;d:CR0,s:RA,s:RB,0,RA,RB,0,RT,0,CR0,0
+ffadds,,1P,EXTRA3,d:FRT;d:CR1,s:FRA,s:FRB,0,FRA,FRB,0,FRT,0,CR1,0
 fdivs,,1P,EXTRA3,d:FRT;d:CR1,s:FRA,s:FRB,0,FRA,FRB,0,FRT,0,CR1,0
 fsubs,,1P,EXTRA3,d:FRT;d:CR1,s:FRA,s:FRB,0,FRA,FRB,0,FRT,0,CR1,0
 fadds,,1P,EXTRA3,d:FRT;d:CR1,s:FRA,s:FRB,0,FRA,FRB,0,FRT,0,CR1,0
diff --git a/openpower/isatables/minor_59.csv b/openpower/isatables/minor_59.csv
index 0891f0a3..1605a58d 100644
--- a/openpower/isatables/minor_59.csv
+++ b/openpower/isatables/minor_59.csv
@@ -16,3 +16,4 @@ opcode,unit,internal op,in1,in2,in3,out,CR in,CR out,inv A,inv out,cry in,cry ou
 -----00101,FPU,OP_FP_MADD,FRA,FRB,FRC,FRT,NONE,CR1,0,0,ZERO,0,NONE,0,0,0,0,1,0,RC,0,0,ffmadds,A,
 -----00110,FPU,OP_FP_MADD,FRA,FRB,FRC,FRT,NONE,CR1,0,0,ZERO,0,NONE,0,0,0,0,1,0,RC,0,0,ffnmsubs,A,
 -----00111,FPU,OP_FP_MADD,FRA,FRB,FRC,FRT,NONE,CR1,0,0,ZERO,0,NONE,0,0,0,0,1,0,RC,0,0,ffnmadds,A,
+-----01101,FPU,OP_FPOP,FRA,FRB,NONE,FRT,NONE,CR1,0,0,ZERO,0,NONE,0,0,0,0,1,0,RC,0,0,ffadds,A,
diff --git a/src/openpower/decoder/power_enums.py b/src/openpower/decoder/power_enums.py
index 41d712e2..48e437ba 100644
--- a/src/openpower/decoder/power_enums.py
+++ b/src/openpower/decoder/power_enums.py
@@ -242,6 +242,7 @@ _insns = [
     "fadd", "fadds", "fsub", "fsubs",                   # FP add / sub
     "fcfids", "fcfidus", "fsqrts", "fres", "frsqrtes",  # FP stuff
     "fmsubs", "fmadds", "fnmsubs", "fnmadds",           # FP 3-arg
+    "ffadds", "ffsubs", "ffmuls", "ffdivs",             # FFT FP 2-arg
     "ffmsubs", "ffmadds", "ffnmsubs", "ffnmadds",       # FFT FP 3-arg
     "fmul", "fmuls", "fdiv", "fdivs",                   # FP mul / div
     "fmr", "fabs", "fnabs", "fneg", "fcpsgn",           # FP move/abs/neg
diff --git a/src/openpower/sv/trans/svp64.py b/src/openpower/sv/trans/svp64.py
index 1c12ea7f..f3b13879 100644
--- a/src/openpower/sv/trans/svp64.py
+++ b/src/openpower/sv/trans/svp64.py
@@ -813,7 +813,17 @@ class SVP64Asm:
             opcode |= int(v30b_newfields[1]) << (32-16) # FRA
             opcode |= int(v30b_newfields[2]) << (32-21) # FRB
             opcode |= int(v30b_newfields[3]) << (32-26) # FRC
-            opcode |= 5 << (32-31)   # bits 26-30
+            opcode |= 0b00101 << (32-31)   # bits 26-30
+            if rc:
+                opcode |= 1  # Rc, bit 31.
+            yield ".long 0x%x" % opcode
+        # argh, sv.ffadds etc. need to be done manually
+        if v30b_op == 'ffadds':
+            opcode = 59 << (32-6)    # bits 0..6 (MSB0)
+            opcode |= int(v30b_newfields[0]) << (32-11) # FRT
+            opcode |= int(v30b_newfields[1]) << (32-16) # FRA
+            opcode |= int(v30b_newfields[2]) << (32-21) # FRB
+            opcode |= 0b01101 << (32-31)   # bits 26-30
             if rc:
                 opcode |= 1  # Rc, bit 31.
             yield ".long 0x%x" % opcode
@@ -973,6 +983,7 @@ if __name__ == '__main__':
     lst = [
              'sv.fmadds 0.v, 8.v, 16.v, 4.v',
              'svremap 8, 1, 1, 1',
+             'sv.fadds 0.v, 8.v, 4.v',
             ]
     isa = SVP64Asm(lst, macros=macros)
     print ("list", list(isa))