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Supporting find first bit instructions

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fbh: Find the first significant bit searching from the high bits
in src0 and store the result in dst.

fbl: Find the first 1 bit searching from the low bits in src0
and store the result in dst.
This commit is contained in:
Homer Hsing 2012-09-14 08:56:36 +08:00 committed by Damien Lespiau
parent b094cd8648
commit 9e711a4f2c
3 changed files with 6 additions and 2 deletions
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2
assembler/src/brw_defines.h
View File

@ -603,6 +603,8 @@
#define BRW_OPCODE_MAC 72
#define BRW_OPCODE_MACH 73
#define BRW_OPCODE_LZD 74
#define BRW_OPCODE_FBH 75
#define BRW_OPCODE_FBL 76
#define BRW_OPCODE_CBIT 77
#define BRW_OPCODE_ADDC 78
#define BRW_OPCODE_SAD2 80

4
assembler/src/gram.y
View File

@ -115,7 +115,7 @@ void set_direct_src_operand(struct src_operand *src, struct direct_reg *reg,
%token <integer> MOV FRC RNDU RNDD RNDE RNDZ NOT LZD
%token <integer> MUL MAC MACH LINE SAD2 SADA2 DP4 DPH DP3 DP2
%token <integer> AVG ADD SEL AND OR XOR SHR SHL ASR CMP CMPN PLN
%token <integer> ADDC BFI1 BFREV CBIT F16TO32 F32TO16
%token <integer> ADDC BFI1 BFREV CBIT F16TO32 F32TO16 FBH FBL
%token <integer> SEND NOP JMPI IF IFF WHILE ELSE BREAK CONT HALT MSAVE
%token <integer> PUSH MREST POP WAIT DO ENDIF ILLEGAL
%token <integer> MATH_INST
@ -418,7 +418,7 @@ unaryinstruction:
;
unaryop: MOV | FRC | RNDU | RNDD | RNDE | RNDZ | NOT | LZD | BFREV | CBIT
| F16TO32 | F32TO16
| F16TO32 | F32TO16 | FBH | FBL
;
binaryinstruction:

2
assembler/src/lex.l
View File

@ -84,6 +84,8 @@ yylval.integer = BRW_CHANNEL_W;
"lzd" { yylval.integer = BRW_OPCODE_LZD; return LZD; }
"f16to32" { yylval.integer = BRW_OPCODE_F16TO32; return F16TO32; }
"f32to16" { yylval.integer = BRW_OPCODE_F32TO16; return F32TO16; }
"fbh" { yylval.integer = BRW_OPCODE_FBH; return FBH; }
"fbl" { yylval.integer = BRW_OPCODE_FBL; return FBL; }
"mad" { yylval.integer = BRW_OPCODE_MAD; return MAD; }
"lrp" { yylval.integer = BRW_OPCODE_LRP; return LRP; }