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panfrost/midgard: Add ilzcnt op

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Used for implementing findLSB/MSB

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
This commit is contained in:
Alyssa Rosenzweig 2019-04-05 05:34:03 +00:00
parent 2e7555b14b
commit 6cba9acb75
2 changed files with 3 additions and 0 deletions
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1
src/gallium/drivers/panfrost/midgard/helpers.h
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@ -253,6 +253,7 @@ static unsigned alu_opcode_props[256] = {
[midgard_alu_op_iand] = UNITS_ADD, /* XXX: Test case where it's right on smul but not sadd */
[midgard_alu_op_ior] = UNITS_ADD,
[midgard_alu_op_ixor] = UNITS_ADD,
[midgard_alu_op_ilzcnt] = UNITS_ADD,
[midgard_alu_op_inot] = UNITS_MOST,
[midgard_alu_op_ishl] = UNITS_ADD,
[midgard_alu_op_iasr] = UNITS_ADD,

2
src/gallium/drivers/panfrost/midgard/midgard.h
View file

@ -85,6 +85,7 @@ typedef enum {
midgard_alu_op_inot = 0x72,
midgard_alu_op_iandnot = 0x74, /* (a, b) -> a & ~b, used for not/b2f */
midgard_alu_op_ixor = 0x76,
midgard_alu_op_ilzcnt = 0x78, /* Number of zeroes on left. 31 - ilzcnt(x) = findMSB(x) */
midgard_alu_op_imov = 0x7B,
midgard_alu_op_iabs = 0x7C,
midgard_alu_op_feq = 0x80,
@ -499,6 +500,7 @@ static char *alu_opcode_names[256] = {
[midgard_alu_op_inot] = "inot",
[midgard_alu_op_iandnot] = "iandnot",
[midgard_alu_op_ixor] = "ixor",
[midgard_alu_op_ilzcnt] = "ilzcnt",
[midgard_alu_op_feq] = "feq",
[midgard_alu_op_fne] = "fne",
[midgard_alu_op_flt] = "flt",